Vendor import of llvm trunk r241361:vendor/llvm/llvm-trunk-r241361

https://llvm.org/svn/llvm-project/llvm/trunk@241361

440 files changed, 4707 insertions, 2211 deletions

diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index a790203434b7..5013f295f5c7 100644
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -1038,7 +1038,9 @@ public:
   /// the validity of the less-than relationship.
   ///
   /// \returns true if *this < RHS when considered unsigned.
-  bool ult(uint64_t RHS) const { return ult(APInt(getBitWidth(), RHS)); }
+  bool ult(uint64_t RHS) const {
+    return getActiveBits() > 64 ? false : getZExtValue() < RHS;
+  }
 
   /// \brief Signed less than comparison
   ///
@@ -1054,7 +1056,9 @@ public:
   /// the validity of the less-than relationship.
   ///
   /// \returns true if *this < RHS when considered signed.
-  bool slt(uint64_t RHS) const { return slt(APInt(getBitWidth(), RHS)); }
+  bool slt(int64_t RHS) const {
+    return getMinSignedBits() > 64 ? isNegative() : getSExtValue() < RHS;
+  }
 
   /// \brief Unsigned less or equal comparison
   ///
@@ -1070,7 +1074,7 @@ public:
   /// the validity of the less-or-equal relationship.
   ///
   /// \returns true if *this <= RHS when considered unsigned.
-  bool ule(uint64_t RHS) const { return ule(APInt(getBitWidth(), RHS)); }
+  bool ule(uint64_t RHS) const { return !ugt(RHS); }
 
   /// \brief Signed less or equal comparison
   ///
@@ -1086,7 +1090,7 @@ public:
   /// validity of the less-or-equal relationship.
   ///
   /// \returns true if *this <= RHS when considered signed.
-  bool sle(uint64_t RHS) const { return sle(APInt(getBitWidth(), RHS)); }
+  bool sle(uint64_t RHS) const { return !sgt(RHS); }
 
   /// \brief Unsigned greather than comparison
   ///
@@ -1102,7 +1106,9 @@ public:
   /// the validity of the greater-than relationship.
   ///
   /// \returns true if *this > RHS when considered unsigned.
-  bool ugt(uint64_t RHS) const { return ugt(APInt(getBitWidth(), RHS)); }
+  bool ugt(uint64_t RHS) const {
+    return getActiveBits() > 64 ? true : getZExtValue() > RHS;
+  }
 
   /// \brief Signed greather than comparison
   ///
@@ -1118,7 +1124,9 @@ public:
   /// the validity of the greater-than relationship.
   ///
   /// \returns true if *this > RHS when considered signed.
-  bool sgt(uint64_t RHS) const { return sgt(APInt(getBitWidth(), RHS)); }
+  bool sgt(int64_t RHS) const {
+    return getMinSignedBits() > 64 ? !isNegative() : getSExtValue() > RHS;
+  }
 
   /// \brief Unsigned greater or equal comparison
   ///
@@ -1134,7 +1142,7 @@ public:
   /// the validity of the greater-or-equal relationship.
   ///
   /// \returns true if *this >= RHS when considered unsigned.
-  bool uge(uint64_t RHS) const { return uge(APInt(getBitWidth(), RHS)); }
+  bool uge(uint64_t RHS) const { return !ult(RHS); }
 
   /// \brief Signed greather or equal comparison
   ///
@@ -1150,7 +1158,7 @@ public:
   /// the validity of the greater-or-equal relationship.
   ///
   /// \returns true if *this >= RHS when considered signed.
-  bool sge(uint64_t RHS) const { return sge(APInt(getBitWidth(), RHS)); }
+  bool sge(int64_t RHS) const { return !slt(RHS); }
 
   /// This operation tests if there are any pairs of corresponding bits
   /// between this APInt and RHS that are both set.
@@ -1896,11 +1904,11 @@ inline APInt Xor(const APInt &LHS, const APInt &RHS) { return LHS ^ RHS; }
 /// Performs a bitwise complement operation on APInt.
 inline APInt Not(const APInt &APIVal) { return ~APIVal; }
 
-} // namespace APIntOps
+} // End of APIntOps namespace
 
 // See friend declaration above. This additional declaration is required in
 // order to compile LLVM with IBM xlC compiler.
 hash_code hash_value(const APInt &Arg);
-} // namespace llvm
+} // End of llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/APSInt.h b/include/llvm/ADT/APSInt.h
index 91ccda22f2f0..a187515f8592 100644
--- a/include/llvm/ADT/APSInt.h
+++ b/include/llvm/ADT/APSInt.h
@@ -33,6 +33,15 @@ public:
   explicit APSInt(APInt I, bool isUnsigned = true)
    : APInt(std::move(I)), IsUnsigned(isUnsigned) {}
 
+  /// Construct an APSInt from a string representation.
+  ///
+  /// This constructor interprets the string \p Str using the radix of 10.
+  /// The interpretation stops at the end of the string. The bit width of the
+  /// constructed APSInt is determined automatically.
+  ///
+  /// \param Str the string to be interpreted.
+  explicit APSInt(StringRef Str);
+
   APSInt &operator=(APInt RHS) {
     // Retain our current sign.
     APInt::operator=(std::move(RHS));
diff --git a/include/llvm/ADT/ArrayRef.h b/include/llvm/ADT/ArrayRef.h
index 397e2ee1f6e4..c8795fd89e33 100644
--- a/include/llvm/ADT/ArrayRef.h
+++ b/include/llvm/ADT/ArrayRef.h
@@ -286,6 +286,11 @@ namespace llvm {
       return MutableArrayRef<T>(data()+N, M);
     }
 
+    MutableArrayRef<T> drop_back(unsigned N) const {
+      assert(this->size() >= N && "Dropping more elements than exist");
+      return slice(0, this->size() - N);
+    }
+
     /// @}
     /// @name Operator Overloads
     /// @{
@@ -361,6 +366,6 @@ namespace llvm {
   template <typename T> struct isPodLike<ArrayRef<T> > {
     static const bool value = true;
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/ADT/BitVector.h b/include/llvm/ADT/BitVector.h
index e57171de9cd7..f58dd7356c7d 100644
--- a/include/llvm/ADT/BitVector.h
+++ b/include/llvm/ADT/BitVector.h
@@ -568,7 +568,7 @@ private:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 namespace std {
   /// Implement std::swap in terms of BitVector swap.
diff --git a/include/llvm/ADT/DenseMap.h b/include/llvm/ADT/DenseMap.h
index bf58becd722d..27f73157a29f 100644
--- a/include/llvm/ADT/DenseMap.h
+++ b/include/llvm/ADT/DenseMap.h
@@ -42,7 +42,7 @@ struct DenseMapPair : public std::pair<KeyT, ValueT> {
   ValueT &getSecond() { return std::pair<KeyT, ValueT>::second; }
   const ValueT &getSecond() const { return std::pair<KeyT, ValueT>::second; }
 };
-} // namespace detail
+}
 
 template <
     typename KeyT, typename ValueT, typename KeyInfoT = DenseMapInfo<KeyT>,
diff --git a/include/llvm/ADT/DenseMapInfo.h b/include/llvm/ADT/DenseMapInfo.h
index 6f17a647b63d..b0a053072079 100644
--- a/include/llvm/ADT/DenseMapInfo.h
+++ b/include/llvm/ADT/DenseMapInfo.h
@@ -14,6 +14,8 @@
 #ifndef LLVM_ADT_DENSEMAPINFO_H
 #define LLVM_ADT_DENSEMAPINFO_H
 
+#include "llvm/ADT/Hashing.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/PointerLikeTypeTraits.h"
 #include "llvm/Support/type_traits.h"
 
@@ -163,6 +165,31 @@ struct DenseMapInfo<std::pair<T, U> > {
   }
 };
 
+// Provide DenseMapInfo for StringRefs.
+template <> struct DenseMapInfo<StringRef> {
+  static inline StringRef getEmptyKey() {
+    return StringRef(reinterpret_cast<const char *>(~static_cast<uintptr_t>(0)),
+                     0);
+  }
+  static inline StringRef getTombstoneKey() {
+    return StringRef(reinterpret_cast<const char *>(~static_cast<uintptr_t>(1)),
+                     0);
+  }
+  static unsigned getHashValue(StringRef Val) {
+    assert(Val.data() != getEmptyKey().data() && "Cannot hash the empty key!");
+    assert(Val.data() != getTombstoneKey().data() &&
+           "Cannot hash the tombstone key!");
+    return (unsigned)(hash_value(Val));
+  }
+  static bool isEqual(StringRef LHS, StringRef RHS) {
+    if (RHS.data() == getEmptyKey().data())
+      return LHS.data() == getEmptyKey().data();
+    if (RHS.data() == getTombstoneKey().data())
+      return LHS.data() == getTombstoneKey().data();
+    return LHS == RHS;
+  }
+};
+
 } // end namespace llvm
 
 #endif
diff --git a/include/llvm/ADT/DenseSet.h b/include/llvm/ADT/DenseSet.h
index b1631be77ad9..d34024005dfe 100644
--- a/include/llvm/ADT/DenseSet.h
+++ b/include/llvm/ADT/DenseSet.h
@@ -32,7 +32,7 @@ public:
   DenseSetEmpty &getSecond() { return *this; }
   const DenseSetEmpty &getSecond() const { return *this; }
 };
-} // namespace detail
+}
 
 /// DenseSet - This implements a dense probed hash-table based set.
 template<typename ValueT, typename ValueInfoT = DenseMapInfo<ValueT> >
diff --git a/include/llvm/ADT/DepthFirstIterator.h b/include/llvm/ADT/DepthFirstIterator.h
index 01bbe1a2dcf9..d79b9acacfa9 100644
--- a/include/llvm/ADT/DepthFirstIterator.h
+++ b/include/llvm/ADT/DepthFirstIterator.h
@@ -288,6 +288,6 @@ iterator_range<idf_ext_iterator<T, SetTy>> inverse_depth_first_ext(const T& G,
   return make_range(idf_ext_begin(G, S), idf_ext_end(G, S));
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/EquivalenceClasses.h b/include/llvm/ADT/EquivalenceClasses.h
index 6e87dbd96ba7..d6a26f88e67d 100644
--- a/include/llvm/ADT/EquivalenceClasses.h
+++ b/include/llvm/ADT/EquivalenceClasses.h
@@ -278,6 +278,6 @@ public:
   };
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/GraphTraits.h b/include/llvm/ADT/GraphTraits.h
index 21bf23b92af4..823caef7647e 100644
--- a/include/llvm/ADT/GraphTraits.h
+++ b/include/llvm/ADT/GraphTraits.h
@@ -101,6 +101,6 @@ struct GraphTraits<Inverse<Inverse<T> > > {
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/IndexedMap.h b/include/llvm/ADT/IndexedMap.h
index ae9c695ec12f..5ba85c027920 100644
--- a/include/llvm/ADT/IndexedMap.h
+++ b/include/llvm/ADT/IndexedMap.h
@@ -80,6 +80,6 @@ template <typename T, typename ToIndexT = llvm::identity<unsigned> >
     }
   };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/IntEqClasses.h b/include/llvm/ADT/IntEqClasses.h
index 9dbc228383e8..8e75c48e3764 100644
--- a/include/llvm/ADT/IntEqClasses.h
+++ b/include/llvm/ADT/IntEqClasses.h
@@ -83,6 +83,6 @@ public:
   void uncompress();
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/Optional.h b/include/llvm/ADT/Optional.h
index dd484979aedc..855ab890392e 100644
--- a/include/llvm/ADT/Optional.h
+++ b/include/llvm/ADT/Optional.h
@@ -204,6 +204,6 @@ void operator>=(const Optional<T> &X, const Optional<U> &Y);
 template<typename T, typename U>
 void operator>(const Optional<T> &X, const Optional<U> &Y);
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/PointerUnion.h b/include/llvm/ADT/PointerUnion.h
index 3c63a522e1c7..f27b81113ec5 100644
--- a/include/llvm/ADT/PointerUnion.h
+++ b/include/llvm/ADT/PointerUnion.h
@@ -507,6 +507,6 @@ namespace llvm {
                                   RHS.template get<U>()));
     }
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/ADT/PostOrderIterator.h b/include/llvm/ADT/PostOrderIterator.h
index 059d7b001194..759a2db24f2a 100644
--- a/include/llvm/ADT/PostOrderIterator.h
+++ b/include/llvm/ADT/PostOrderIterator.h
@@ -295,6 +295,6 @@ public:
   rpo_iterator end() { return Blocks.rend(); }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/PriorityQueue.h b/include/llvm/ADT/PriorityQueue.h
index 869ef815b06e..827d0b346e59 100644
--- a/include/llvm/ADT/PriorityQueue.h
+++ b/include/llvm/ADT/PriorityQueue.h
@@ -79,6 +79,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/SCCIterator.h b/include/llvm/ADT/SCCIterator.h
index dc78274fb5f5..bc74416ac88b 100644
--- a/include/llvm/ADT/SCCIterator.h
+++ b/include/llvm/ADT/SCCIterator.h
@@ -240,6 +240,6 @@ template <class T> scc_iterator<Inverse<T> > scc_end(const Inverse<T> &G) {
   return scc_iterator<Inverse<T> >::end(G);
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/STLExtras.h b/include/llvm/ADT/STLExtras.h
index 14204c130af6..b68345a1dcf6 100644
--- a/include/llvm/ADT/STLExtras.h
+++ b/include/llvm/ADT/STLExtras.h
@@ -417,6 +417,6 @@ template <typename T> struct deref {
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/SetOperations.h b/include/llvm/ADT/SetOperations.h
index b5f41776caf0..71f5db380f6e 100644
--- a/include/llvm/ADT/SetOperations.h
+++ b/include/llvm/ADT/SetOperations.h
@@ -66,6 +66,6 @@ void set_subtract(S1Ty &S1, const S2Ty &S2) {
     S1.erase(*SI);
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/SetVector.h b/include/llvm/ADT/SetVector.h
index f15f4f7ac245..a7fd408c854a 100644
--- a/include/llvm/ADT/SetVector.h
+++ b/include/llvm/ADT/SetVector.h
@@ -225,7 +225,7 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 // vim: sw=2 ai
 #endif
diff --git a/include/llvm/ADT/SmallBitVector.h b/include/llvm/ADT/SmallBitVector.h
index a74b7bf68d25..ae3d645396fd 100644
--- a/include/llvm/ADT/SmallBitVector.h
+++ b/include/llvm/ADT/SmallBitVector.h
@@ -588,7 +588,7 @@ operator^(const SmallBitVector &LHS, const SmallBitVector &RHS) {
   return Result;
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 namespace std {
   /// Implement std::swap in terms of BitVector swap.
diff --git a/include/llvm/ADT/SmallPtrSet.h b/include/llvm/ADT/SmallPtrSet.h
index 0d1635ae01e9..3e3c9c154ef4 100644
--- a/include/llvm/ADT/SmallPtrSet.h
+++ b/include/llvm/ADT/SmallPtrSet.h
@@ -334,7 +334,7 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 namespace std {
   /// Implement std::swap in terms of SmallPtrSet swap.
diff --git a/include/llvm/ADT/SmallString.h b/include/llvm/ADT/SmallString.h
index 92cd6892621c..e569f54481a2 100644
--- a/include/llvm/ADT/SmallString.h
+++ b/include/llvm/ADT/SmallString.h
@@ -292,6 +292,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/ADT/SmallVector.h b/include/llvm/ADT/SmallVector.h
index b334ac0423a0..5b208b76a21f 100644
--- a/include/llvm/ADT/SmallVector.h
+++ b/include/llvm/ADT/SmallVector.h
@@ -924,7 +924,7 @@ static inline size_t capacity_in_bytes(const SmallVector<T, N> &X) {
   return X.capacity_in_bytes();
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 namespace std {
   /// Implement std::swap in terms of SmallVector swap.
@@ -940,6 +940,6 @@ namespace std {
   swap(llvm::SmallVector<T, N> &LHS, llvm::SmallVector<T, N> &RHS) {
     LHS.swap(RHS);
   }
-} // namespace std
+}
 
 #endif
diff --git a/include/llvm/ADT/Statistic.h b/include/llvm/ADT/Statistic.h
index 264c6b54eccd..d98abc375e8a 100644
--- a/include/llvm/ADT/Statistic.h
+++ b/include/llvm/ADT/Statistic.h
@@ -176,6 +176,6 @@ void PrintStatistics();
 /// \brief Print statistics to the given output stream.
 void PrintStatistics(raw_ostream &OS);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/StringExtras.h b/include/llvm/ADT/StringExtras.h
index 5e8c072761af..0992f5d4a549 100644
--- a/include/llvm/ADT/StringExtras.h
+++ b/include/llvm/ADT/StringExtras.h
@@ -207,6 +207,6 @@ inline std::string join(IteratorT Begin, IteratorT End, StringRef Separator) {
   return join_impl(Begin, End, Separator, tag());
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/StringMap.h b/include/llvm/ADT/StringMap.h
index c8ece8fb307d..8721c73b95b1 100644
--- a/include/llvm/ADT/StringMap.h
+++ b/include/llvm/ADT/StringMap.h
@@ -447,6 +447,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/ADT/StringRef.h b/include/llvm/ADT/StringRef.h
index 163ec6361944..95660a49f1f1 100644
--- a/include/llvm/ADT/StringRef.h
+++ b/include/llvm/ADT/StringRef.h
@@ -566,6 +566,6 @@ namespace llvm {
   // StringRefs can be treated like a POD type.
   template <typename T> struct isPodLike;
   template <> struct isPodLike<StringRef> { static const bool value = true; };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/ADT/StringSet.h b/include/llvm/ADT/StringSet.h
index 7c5247692225..3e0cc200b6dd 100644
--- a/include/llvm/ADT/StringSet.h
+++ b/include/llvm/ADT/StringSet.h
@@ -29,6 +29,6 @@ namespace llvm {
       return base::insert(std::make_pair(Key, '\0'));
     }
   };
-} // namespace llvm
+}
 
 #endif // LLVM_ADT_STRINGSET_H
diff --git a/include/llvm/ADT/Triple.h b/include/llvm/ADT/Triple.h
index cb6edc8c3e95..06f5870119c8 100644
--- a/include/llvm/ADT/Triple.h
+++ b/include/llvm/ADT/Triple.h
@@ -85,7 +85,9 @@ public:
     spir64,     // SPIR: standard portable IR for OpenCL 64-bit version
     kalimba,    // Kalimba: generic kalimba
     shave,      // SHAVE: Movidius vector VLIW processors
-    LastArchType = shave
+    wasm32,     // WebAssembly with 32-bit pointers
+    wasm64,     // WebAssembly with 64-bit pointers
+    LastArchType = wasm64
   };
   enum SubArchType {
     NoSubArch,
@@ -609,7 +611,7 @@ public:
   /// @}
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 
 #endif
diff --git a/include/llvm/ADT/Twine.h b/include/llvm/ADT/Twine.h
index db4a5be54917..db0bf4b68de8 100644
--- a/include/llvm/ADT/Twine.h
+++ b/include/llvm/ADT/Twine.h
@@ -537,6 +537,6 @@ namespace llvm {
   }
 
   /// @}
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/ADT/edit_distance.h b/include/llvm/ADT/edit_distance.h
index 5fc4beea782e..c2b2041242aa 100644
--- a/include/llvm/ADT/edit_distance.h
+++ b/include/llvm/ADT/edit_distance.h
@@ -97,6 +97,6 @@ unsigned ComputeEditDistance(ArrayRef<T> FromArray, ArrayRef<T> ToArray,
   return Result;
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/ilist.h b/include/llvm/ADT/ilist.h
index 4f101674e716..a7b9306b3a73 100644
--- a/include/llvm/ADT/ilist.h
+++ b/include/llvm/ADT/ilist.h
@@ -655,7 +655,7 @@ struct ilist : public iplist<NodeTy> {
   void resize(size_type newsize) { resize(newsize, NodeTy()); }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 namespace std {
   // Ensure that swap uses the fast list swap...
diff --git a/include/llvm/ADT/ilist_node.h b/include/llvm/ADT/ilist_node.h
index 14ca26bffd33..26d0b55e4093 100644
--- a/include/llvm/ADT/ilist_node.h
+++ b/include/llvm/ADT/ilist_node.h
@@ -101,6 +101,6 @@ public:
   /// @}
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ADT/iterator.h b/include/llvm/ADT/iterator.h
index 28728cac0f57..c30792892703 100644
--- a/include/llvm/ADT/iterator.h
+++ b/include/llvm/ADT/iterator.h
@@ -162,6 +162,8 @@ protected:
           int>::type = 0)
       : I(std::forward<U &&>(u)) {}
 
+  const WrappedIteratorT &wrapped() const { return I; }
+
 public:
   typedef DifferenceTypeT difference_type;
 
@@ -239,6 +241,6 @@ struct pointee_iterator
   T &operator*() const { return **this->I; }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/ADT/iterator_range.h b/include/llvm/ADT/iterator_range.h
index 009b7161aada..523a86f02e08 100644
--- a/include/llvm/ADT/iterator_range.h
+++ b/include/llvm/ADT/iterator_range.h
@@ -51,6 +51,6 @@ template <class T> iterator_range<T> make_range(T x, T y) {
 template <typename T> iterator_range<T> make_range(std::pair<T, T> p) {
   return iterator_range<T>(std::move(p.first), std::move(p.second));
 }
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/AliasAnalysis.h b/include/llvm/Analysis/AliasAnalysis.h
index 7f037fb5e813..f4c1167314a1 100644
--- a/include/llvm/Analysis/AliasAnalysis.h
+++ b/include/llvm/Analysis/AliasAnalysis.h
@@ -56,6 +56,34 @@ class MemTransferInst;
 class MemIntrinsic;
 class DominatorTree;
 
+/// The possible results of an alias query.
+///
+/// These results are always computed between two MemoryLocation objects as
+/// a query to some alias analysis.
+///
+/// Note that these are unscoped enumerations because we would like to support
+/// implicitly testing a result for the existence of any possible aliasing with
+/// a conversion to bool, but an "enum class" doesn't support this. The
+/// canonical names from the literature are suffixed and unique anyways, and so
+/// they serve as global constants in LLVM for these results.
+///
+/// See docs/AliasAnalysis.html for more information on the specific meanings
+/// of these values.
+enum AliasResult {
+  /// The two locations do not alias at all.
+  ///
+  /// This value is arranged to convert to false, while all other values
+  /// convert to true. This allows a boolean context to convert the result to
+  /// a binary flag indicating whether there is the possibility of aliasing.
+  NoAlias = 0,
+  /// The two locations may or may not alias. This is the least precise result.
+  MayAlias,
+  /// The two locations alias, but only due to a partial overlap.
+  PartialAlias,
+  /// The two locations precisely alias each other.
+  MustAlias,
+};
+
 class AliasAnalysis {
 protected:
   const DataLayout *DL;
@@ -95,22 +123,6 @@ public:
   /// Alias Queries...
   ///
 
-  /// Alias analysis result - Either we know for sure that it does not alias, we
-  /// know for sure it must alias, or we don't know anything: The two pointers
-  /// _might_ alias.  This enum is designed so you can do things like:
-  ///     if (AA.alias(P1, P2)) { ... }
-  /// to check to see if two pointers might alias.
-  ///
-  /// See docs/AliasAnalysis.html for more information on the specific meanings
-  /// of these values.
-  ///
-  enum AliasResult {
-    NoAlias = 0,        ///< No dependencies.
-    MayAlias,           ///< Anything goes.
-    PartialAlias,       ///< Pointers differ, but pointees overlap.
-    MustAlias           ///< Pointers are equal.
-  };
-
   /// alias - The main low level interface to the alias analysis implementation.
   /// Returns an AliasResult indicating whether the two pointers are aliased to
   /// each other.  This is the interface that must be implemented by specific
@@ -558,6 +570,6 @@ bool isIdentifiedObject(const Value *V);
 /// IdentifiedObjects.
 bool isIdentifiedFunctionLocal(const Value *V);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/AliasSetTracker.h b/include/llvm/Analysis/AliasSetTracker.h
index ba2eae903da6..881699d09225 100644
--- a/include/llvm/Analysis/AliasSetTracker.h
+++ b/include/llvm/Analysis/AliasSetTracker.h
@@ -117,24 +117,30 @@ class AliasSet : public ilist_node<AliasSet> {
   // AliasSets forwarding to it.
   unsigned RefCount : 28;
 
-  /// AccessType - Keep track of whether this alias set merely refers to the
-  /// locations of memory, whether it modifies the memory, or whether it does
-  /// both.  The lattice goes from "NoModRef" to either Refs or Mods, then to
-  /// ModRef as necessary.
+  /// The kinds of access this alias set models.
   ///
-  enum AccessType {
-    NoModRef = 0, Refs = 1,         // Ref = bit 1
-    Mods     = 2, ModRef = 3        // Mod = bit 2
+  /// We keep track of whether this alias set merely refers to the locations of
+  /// memory (and not any particular access), whether it modifies or references
+  /// the memory, or whether it does both. The lattice goes from "NoAccess" to
+  /// either RefAccess or ModAccess, then to ModRefAccess as necessary.
+  enum AccessLattice {
+    NoAccess = 0,
+    RefAccess = 1,
+    ModAccess = 2,
+    ModRefAccess = RefAccess | ModAccess
   };
-  unsigned AccessTy : 2;
+  unsigned Access : 2;
 
-  /// AliasType - Keep track the relationships between the pointers in the set.
-  /// Lattice goes from MustAlias to MayAlias.
+  /// The kind of alias relationship between pointers of the set.
   ///
-  enum AliasType {
-    MustAlias = 0, MayAlias = 1
+  /// These represent conservatively correct alias results between any members
+  /// of the set. We represent these independently of the values of alias
+  /// results in order to pack it into a single bit. Lattice goes from
+  /// MustAlias to MayAlias.
+  enum AliasLattice {
+    SetMustAlias = 0, SetMayAlias = 1
   };
-  unsigned AliasTy : 1;
+  unsigned Alias : 1;
 
   // Volatile - True if this alias set contains volatile loads or stores.
   bool Volatile : 1;
@@ -153,10 +159,10 @@ class AliasSet : public ilist_node<AliasSet> {
   
 public:
   /// Accessors...
-  bool isRef() const { return AccessTy & Refs; }
-  bool isMod() const { return AccessTy & Mods; }
-  bool isMustAlias() const { return AliasTy == MustAlias; }
-  bool isMayAlias()  const { return AliasTy == MayAlias; }
+  bool isRef() const { return Access & RefAccess; }
+  bool isMod() const { return Access & ModAccess; }
+  bool isMustAlias() const { return Alias == SetMustAlias; }
+  bool isMayAlias()  const { return Alias == SetMayAlias; }
 
   // isVolatile - Return true if this alias set contains volatile loads or
   // stores.
@@ -218,7 +224,7 @@ private:
   friend struct ilist_sentinel_traits<AliasSet>;
   AliasSet()
     : PtrList(nullptr), PtrListEnd(&PtrList), Forward(nullptr), RefCount(0),
-      AccessTy(NoModRef), AliasTy(MustAlias), Volatile(false) {
+      Access(NoAccess), Alias(SetMustAlias), Volatile(false) {
   }
 
   AliasSet(const AliasSet &AS) = delete;
@@ -419,11 +425,11 @@ private:
   }
 
   AliasSet &addPointer(Value *P, uint64_t Size, const AAMDNodes &AAInfo,
-                       AliasSet::AccessType E,
+                       AliasSet::AccessLattice E,
                        bool &NewSet) {
     NewSet = false;
     AliasSet &AS = getAliasSetForPointer(P, Size, AAInfo, &NewSet);
-    AS.AccessTy |= E;
+    AS.Access |= E;
     return AS;
   }
   AliasSet *findAliasSetForPointer(const Value *Ptr, uint64_t Size,
@@ -437,6 +443,6 @@ inline raw_ostream& operator<<(raw_ostream &OS, const AliasSetTracker &AST) {
   return OS;
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/BlockFrequencyInfo.h b/include/llvm/Analysis/BlockFrequencyInfo.h
index 382c080a2c03..f27c32df9283 100644
--- a/include/llvm/Analysis/BlockFrequencyInfo.h
+++ b/include/llvm/Analysis/BlockFrequencyInfo.h
@@ -63,6 +63,6 @@ public:
 
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/BlockFrequencyInfoImpl.h b/include/llvm/Analysis/BlockFrequencyInfoImpl.h
index bf24f66cbca9..32d96090f456 100644
--- a/include/llvm/Analysis/BlockFrequencyInfoImpl.h
+++ b/include/llvm/Analysis/BlockFrequencyInfoImpl.h
@@ -628,7 +628,7 @@ void IrreducibleGraph::addEdges(const BlockNode &Node,
   else
     addBlockEdges(*this, Irr, OuterLoop);
 }
-} // namespace bfi_detail
+}
 
 /// \brief Shared implementation for block frequency analysis.
 ///
@@ -1133,7 +1133,7 @@ template <class BT> struct BlockEdgesAdder {
       G.addEdge(Irr, BFI.getNode(*I), OuterLoop);
   }
 };
-} // namespace bfi_detail
+}
 template <class BT>
 void BlockFrequencyInfoImpl<BT>::computeIrreducibleMass(
     LoopData *OuterLoop, std::list<LoopData>::iterator Insert) {
diff --git a/include/llvm/Analysis/BranchProbabilityInfo.h b/include/llvm/Analysis/BranchProbabilityInfo.h
index f2ca3e0d07cf..9d867567ba29 100644
--- a/include/llvm/Analysis/BranchProbabilityInfo.h
+++ b/include/llvm/Analysis/BranchProbabilityInfo.h
@@ -158,6 +158,6 @@ private:
   bool calcInvokeHeuristics(BasicBlock *BB);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/CFG.h b/include/llvm/Analysis/CFG.h
index f837cb4f59cb..7c4df780198c 100644
--- a/include/llvm/Analysis/CFG.h
+++ b/include/llvm/Analysis/CFG.h
@@ -78,6 +78,17 @@ bool isPotentiallyReachable(const BasicBlock *From, const BasicBlock *To,
                             const DominatorTree *DT = nullptr,
                             const LoopInfo *LI = nullptr);
 
-} // namespace llvm
+/// \brief Determine whether there is at least one path from a block in
+/// 'Worklist' to 'StopBB', returning true if uncertain.
+///
+/// Determine whether there is a path from at least one block in Worklist to
+/// StopBB within a single function. Returns false only if we can prove that
+/// once any block in 'Worklist' has been reached then 'StopBB' can not be
+/// executed. Conservatively returns true.
+bool isPotentiallyReachableFromMany(SmallVectorImpl<BasicBlock *> &Worklist,
+                                    BasicBlock *StopBB,
+                                    const DominatorTree *DT = nullptr,
+                                    const LoopInfo *LI = nullptr);
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/CFGPrinter.h b/include/llvm/Analysis/CFGPrinter.h
index 0cc4e5d33975..035764837e6f 100644
--- a/include/llvm/Analysis/CFGPrinter.h
+++ b/include/llvm/Analysis/CFGPrinter.h
@@ -119,7 +119,7 @@ struct DOTGraphTraits<const Function*> : public DefaultDOTGraphTraits {
     return "";
   }
 };
-} // namespace llvm
+} // End llvm namespace
 
 namespace llvm {
   class FunctionPass;
diff --git a/include/llvm/Analysis/CGSCCPassManager.h b/include/llvm/Analysis/CGSCCPassManager.h
index 42f0e651ec94..6a406cd24402 100644
--- a/include/llvm/Analysis/CGSCCPassManager.h
+++ b/include/llvm/Analysis/CGSCCPassManager.h
@@ -485,6 +485,6 @@ CGSCCToFunctionPassAdaptor<FunctionPassT>
 createCGSCCToFunctionPassAdaptor(FunctionPassT Pass) {
   return CGSCCToFunctionPassAdaptor<FunctionPassT>(std::move(Pass));
 }
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/CallGraph.h b/include/llvm/Analysis/CallGraph.h
index ed52e864a059..662ae0e6363c 100644
--- a/include/llvm/Analysis/CallGraph.h
+++ b/include/llvm/Analysis/CallGraph.h
@@ -481,6 +481,6 @@ struct GraphTraits<const CallGraph *> : public GraphTraits<
   static const CallGraphNode &CGdereference(PairTy P) { return *P.second; }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/CallGraphSCCPass.h b/include/llvm/Analysis/CallGraphSCCPass.h
index 94fa5bd7fb2a..667e1715775f 100644
--- a/include/llvm/Analysis/CallGraphSCCPass.h
+++ b/include/llvm/Analysis/CallGraphSCCPass.h
@@ -102,6 +102,6 @@ public:
   iterator end() const { return Nodes.end(); }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/CodeMetrics.h b/include/llvm/Analysis/CodeMetrics.h
index 6ab83aefe81b..2f5969129e02 100644
--- a/include/llvm/Analysis/CodeMetrics.h
+++ b/include/llvm/Analysis/CodeMetrics.h
@@ -102,6 +102,6 @@ struct CodeMetrics {
                                      SmallPtrSetImpl<const Value *> &EphValues);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/ConstantFolding.h b/include/llvm/Analysis/ConstantFolding.h
index a0d5eaba9c7b..541a2109af6c 100644
--- a/include/llvm/Analysis/ConstantFolding.h
+++ b/include/llvm/Analysis/ConstantFolding.h
@@ -97,6 +97,6 @@ bool canConstantFoldCallTo(const Function *F);
 /// with the specified arguments, returning null if unsuccessful.
 Constant *ConstantFoldCall(Function *F, ArrayRef<Constant *> Operands,
                            const TargetLibraryInfo *TLI = nullptr);
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/DomPrinter.h b/include/llvm/Analysis/DomPrinter.h
index 1402d7749d79..0ed28994995a 100644
--- a/include/llvm/Analysis/DomPrinter.h
+++ b/include/llvm/Analysis/DomPrinter.h
@@ -25,6 +25,6 @@ namespace llvm {
   FunctionPass *createPostDomOnlyPrinterPass();
   FunctionPass *createPostDomViewerPass();
   FunctionPass *createPostDomOnlyViewerPass();
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/DominanceFrontier.h b/include/llvm/Analysis/DominanceFrontier.h
index 0cdd73e01630..996700efdb60 100644
--- a/include/llvm/Analysis/DominanceFrontier.h
+++ b/include/llvm/Analysis/DominanceFrontier.h
@@ -205,6 +205,6 @@ public:
 EXTERN_TEMPLATE_INSTANTIATION(class DominanceFrontierBase<BasicBlock>);
 EXTERN_TEMPLATE_INSTANTIATION(class ForwardDominanceFrontierBase<BasicBlock>);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/DominanceFrontierImpl.h b/include/llvm/Analysis/DominanceFrontierImpl.h
index 4904f93c17ac..629ae3809045 100644
--- a/include/llvm/Analysis/DominanceFrontierImpl.h
+++ b/include/llvm/Analysis/DominanceFrontierImpl.h
@@ -221,6 +221,6 @@ ForwardDominanceFrontierBase<BlockT>::calculate(const DomTreeT &DT,
   return *Result;
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/IVUsers.h b/include/llvm/Analysis/IVUsers.h
index 2ad0ae74eb10..ae9c1f5bd9ac 100644
--- a/include/llvm/Analysis/IVUsers.h
+++ b/include/llvm/Analysis/IVUsers.h
@@ -178,6 +178,6 @@ protected:
 
 Pass *createIVUsersPass();
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/InlineCost.h b/include/llvm/Analysis/InlineCost.h
index 57da1325ec35..79ed74d82411 100644
--- a/include/llvm/Analysis/InlineCost.h
+++ b/include/llvm/Analysis/InlineCost.h
@@ -36,7 +36,7 @@ namespace InlineConstants {
   /// Do not inline functions which allocate this many bytes on the stack
   /// when the caller is recursive.
   const unsigned TotalAllocaSizeRecursiveCaller = 1024;
-} // namespace InlineConstants
+}
 
 /// \brief Represents the cost of inlining a function.
 ///
@@ -138,6 +138,6 @@ public:
   bool isInlineViable(Function &Callee);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/Interval.h b/include/llvm/Analysis/Interval.h
index cbdb0c033499..01eba3f16c01 100644
--- a/include/llvm/Analysis/Interval.h
+++ b/include/llvm/Analysis/Interval.h
@@ -145,6 +145,6 @@ template <> struct GraphTraits<Inverse<Interval*> > {
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/IntervalIterator.h b/include/llvm/Analysis/IntervalIterator.h
index 5ec50d46a9e7..655ce2dab413 100644
--- a/include/llvm/Analysis/IntervalIterator.h
+++ b/include/llvm/Analysis/IntervalIterator.h
@@ -263,6 +263,6 @@ inline interval_part_interval_iterator intervals_end(IntervalPartition &IP) {
   return interval_part_interval_iterator();
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/IntervalPartition.h b/include/llvm/Analysis/IntervalPartition.h
index 2176d0c509f1..274be2bdcfa9 100644
--- a/include/llvm/Analysis/IntervalPartition.h
+++ b/include/llvm/Analysis/IntervalPartition.h
@@ -106,6 +106,6 @@ private:
   void updatePredecessors(Interval *Int);
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/IteratedDominanceFrontier.h b/include/llvm/Analysis/IteratedDominanceFrontier.h
index eea0d81a8889..5a339f10f50f 100644
--- a/include/llvm/Analysis/IteratedDominanceFrontier.h
+++ b/include/llvm/Analysis/IteratedDominanceFrontier.h
@@ -92,5 +92,5 @@ private:
   const SmallPtrSetImpl<BasicBlock *> *DefBlocks;
   SmallVector<BasicBlock *, 32> PHIBlocks;
 };
-} // namespace llvm
+}
 #endif
diff --git a/include/llvm/Analysis/JumpInstrTableInfo.h b/include/llvm/Analysis/JumpInstrTableInfo.h
index ea331a4f516a..b6dad478cdf2 100644
--- a/include/llvm/Analysis/JumpInstrTableInfo.h
+++ b/include/llvm/Analysis/JumpInstrTableInfo.h
@@ -66,6 +66,6 @@ private:
 /// bound specifies the maximum number of bytes needed to represent an
 /// unconditional jump or a trap instruction in the back end currently in use.
 ModulePass *createJumpInstrTableInfoPass(unsigned Bound);
-} // namespace llvm
+}
 
 #endif /* LLVM_ANALYSIS_JUMPINSTRTABLEINFO_H */
diff --git a/include/llvm/Analysis/LazyCallGraph.h b/include/llvm/Analysis/LazyCallGraph.h
index af4861ff35bf..b0b9068de34b 100644
--- a/include/llvm/Analysis/LazyCallGraph.h
+++ b/include/llvm/Analysis/LazyCallGraph.h
@@ -569,6 +569,6 @@ public:
   static StringRef name() { return "LazyCallGraphPrinterPass"; }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/LibCallAliasAnalysis.h b/include/llvm/Analysis/LibCallAliasAnalysis.h
index a4b7e5d871fe..6589ac13c746 100644
--- a/include/llvm/Analysis/LibCallAliasAnalysis.h
+++ b/include/llvm/Analysis/LibCallAliasAnalysis.h
@@ -66,6 +66,6 @@ namespace llvm {
                                        ImmutableCallSite CS,
                                        const MemoryLocation &Loc);
   };
-} // namespace llvm
+}  // End of llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/Lint.h b/include/llvm/Analysis/Lint.h
index 79cd82ff1337..7c88b137ec3b 100644
--- a/include/llvm/Analysis/Lint.h
+++ b/include/llvm/Analysis/Lint.h
@@ -44,6 +44,6 @@ void lintFunction(
   const Function &F  ///< The function to be checked
 );
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/Loads.h b/include/llvm/Analysis/Loads.h
index c8a6e4a0e1d7..42667d2af14a 100644
--- a/include/llvm/Analysis/Loads.h
+++ b/include/llvm/Analysis/Loads.h
@@ -52,6 +52,6 @@ Value *FindAvailableLoadedValue(Value *Ptr, BasicBlock *ScanBB,
                                 AliasAnalysis *AA = nullptr,
                                 AAMDNodes *AATags = nullptr);
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/LoopAccessAnalysis.h b/include/llvm/Analysis/LoopAccessAnalysis.h
index 0f3c73147e11..7b635a8b4960 100644
--- a/include/llvm/Analysis/LoopAccessAnalysis.h
+++ b/include/llvm/Analysis/LoopAccessAnalysis.h
@@ -555,6 +555,6 @@ private:
   DominatorTree *DT;
   LoopInfo *LI;
 };
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/LoopInfo.h b/include/llvm/Analysis/LoopInfo.h
index 7bfebab46e20..bbcde8d9721a 100644
--- a/include/llvm/Analysis/LoopInfo.h
+++ b/include/llvm/Analysis/LoopInfo.h
@@ -763,6 +763,6 @@ public:
   void getAnalysisUsage(AnalysisUsage &AU) const override;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/LoopInfoImpl.h b/include/llvm/Analysis/LoopInfoImpl.h
index b8f80df34bf9..f5cc856f6247 100644
--- a/include/llvm/Analysis/LoopInfoImpl.h
+++ b/include/llvm/Analysis/LoopInfoImpl.h
@@ -535,6 +535,6 @@ void LoopInfoBase<BlockT, LoopT>::verify() const {
 #endif
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/LoopPass.h b/include/llvm/Analysis/LoopPass.h
index 57ad79319756..8650000fcfb6 100644
--- a/include/llvm/Analysis/LoopPass.h
+++ b/include/llvm/Analysis/LoopPass.h
@@ -169,6 +169,6 @@ private:
   Loop *CurrentLoop;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/MemoryBuiltins.h b/include/llvm/Analysis/MemoryBuiltins.h
index 557d6fcc0cb9..805a43dfb070 100644
--- a/include/llvm/Analysis/MemoryBuiltins.h
+++ b/include/llvm/Analysis/MemoryBuiltins.h
@@ -262,6 +262,6 @@ public:
   SizeOffsetEvalType visitInstruction(Instruction &I);
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/MemoryDependenceAnalysis.h b/include/llvm/Analysis/MemoryDependenceAnalysis.h
index 9c50ae08f986..511898071c22 100644
--- a/include/llvm/Analysis/MemoryDependenceAnalysis.h
+++ b/include/llvm/Analysis/MemoryDependenceAnalysis.h
@@ -445,6 +445,6 @@ namespace llvm {
 
   };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/MemoryLocation.h b/include/llvm/Analysis/MemoryLocation.h
index ea69633a922c..426b49a3ecd7 100644
--- a/include/llvm/Analysis/MemoryLocation.h
+++ b/include/llvm/Analysis/MemoryLocation.h
@@ -137,6 +137,6 @@ template <> struct DenseMapInfo<MemoryLocation> {
     return LHS == RHS;
   }
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/Passes.h b/include/llvm/Analysis/Passes.h
index ffaf871cf9e5..d112ab1823b4 100644
--- a/include/llvm/Analysis/Passes.h
+++ b/include/llvm/Analysis/Passes.h
@@ -173,6 +173,6 @@ namespace llvm {
   //
   FunctionPass *createMemDerefPrinter();
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/PostDominators.h b/include/llvm/Analysis/PostDominators.h
index f654652a97c3..0f7e2b88d2d7 100644
--- a/include/llvm/Analysis/PostDominators.h
+++ b/include/llvm/Analysis/PostDominators.h
@@ -112,6 +112,6 @@ template <> struct GraphTraits<PostDominatorTree*>
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/PtrUseVisitor.h b/include/llvm/Analysis/PtrUseVisitor.h
index 8b5b90a3402e..6e61fc3be384 100644
--- a/include/llvm/Analysis/PtrUseVisitor.h
+++ b/include/llvm/Analysis/PtrUseVisitor.h
@@ -280,6 +280,6 @@ protected:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/RegionInfo.h b/include/llvm/Analysis/RegionInfo.h
index 22fd1dfc0e78..7ceb086ee0a1 100644
--- a/include/llvm/Analysis/RegionInfo.h
+++ b/include/llvm/Analysis/RegionInfo.h
@@ -906,5 +906,5 @@ EXTERN_TEMPLATE_INSTANTIATION(class RegionBase<RegionTraits<Function>>);
 EXTERN_TEMPLATE_INSTANTIATION(class RegionNodeBase<RegionTraits<Function>>);
 EXTERN_TEMPLATE_INSTANTIATION(class RegionInfoBase<RegionTraits<Function>>);
 
-} // namespace llvm
+} // End llvm namespace
 #endif
diff --git a/include/llvm/Analysis/RegionPass.h b/include/llvm/Analysis/RegionPass.h
index 5866fc5abc8c..bd51c49e87db 100644
--- a/include/llvm/Analysis/RegionPass.h
+++ b/include/llvm/Analysis/RegionPass.h
@@ -123,6 +123,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/ScalarEvolution.h b/include/llvm/Analysis/ScalarEvolution.h
index 1c814084c090..d47cab829ced 100644
--- a/include/llvm/Analysis/ScalarEvolution.h
+++ b/include/llvm/Analysis/ScalarEvolution.h
@@ -954,6 +954,86 @@ namespace llvm {
     void print(raw_ostream &OS, const Module* = nullptr) const override;
     void verifyAnalysis() const override;
 
+    /// Collect parametric terms occurring in step expressions.
+    void collectParametricTerms(const SCEV *Expr,
+                                SmallVectorImpl<const SCEV *> &Terms);
+
+
+
+    /// Return in Subscripts the access functions for each dimension in Sizes.
+    void computeAccessFunctions(const SCEV *Expr,
+                                SmallVectorImpl<const SCEV *> &Subscripts,
+                                SmallVectorImpl<const SCEV *> &Sizes);
+
+    /// Split this SCEVAddRecExpr into two vectors of SCEVs representing the
+    /// subscripts and sizes of an array access.
+    ///
+    /// The delinearization is a 3 step process: the first two steps compute the
+    /// sizes of each subscript and the third step computes the access functions
+    /// for the delinearized array:
+    ///
+    /// 1. Find the terms in the step functions
+    /// 2. Compute the array size
+    /// 3. Compute the access function: divide the SCEV by the array size
+    ///    starting with the innermost dimensions found in step 2. The Quotient
+    ///    is the SCEV to be divided in the next step of the recursion. The
+    ///    Remainder is the subscript of the innermost dimension. Loop over all
+    ///    array dimensions computed in step 2.
+    ///
+    /// To compute a uniform array size for several memory accesses to the same
+    /// object, one can collect in step 1 all the step terms for all the memory
+    /// accesses, and compute in step 2 a unique array shape. This guarantees
+    /// that the array shape will be the same across all memory accesses.
+    ///
+    /// FIXME: We could derive the result of steps 1 and 2 from a description of
+    /// the array shape given in metadata.
+    ///
+    /// Example:
+    ///
+    /// A[][n][m]
+    ///
+    /// for i
+    ///   for j
+    ///     for k
+    ///       A[j+k][2i][5i] =
+    ///
+    /// The initial SCEV:
+    ///
+    /// A[{{{0,+,2*m+5}_i, +, n*m}_j, +, n*m}_k]
+    ///
+    /// 1. Find the different terms in the step functions:
+    /// -> [2*m, 5, n*m, n*m]
+    ///
+    /// 2. Compute the array size: sort and unique them
+    /// -> [n*m, 2*m, 5]
+    /// find the GCD of all the terms = 1
+    /// divide by the GCD and erase constant terms
+    /// -> [n*m, 2*m]
+    /// GCD = m
+    /// divide by GCD -> [n, 2]
+    /// remove constant terms
+    /// -> [n]
+    /// size of the array is A[unknown][n][m]
+    ///
+    /// 3. Compute the access function
+    /// a. Divide {{{0,+,2*m+5}_i, +, n*m}_j, +, n*m}_k by the innermost size m
+    /// Quotient: {{{0,+,2}_i, +, n}_j, +, n}_k
+    /// Remainder: {{{0,+,5}_i, +, 0}_j, +, 0}_k
+    /// The remainder is the subscript of the innermost array dimension: [5i].
+    ///
+    /// b. Divide Quotient: {{{0,+,2}_i, +, n}_j, +, n}_k by next outer size n
+    /// Quotient: {{{0,+,0}_i, +, 1}_j, +, 1}_k
+    /// Remainder: {{{0,+,2}_i, +, 0}_j, +, 0}_k
+    /// The Remainder is the subscript of the next array dimension: [2i].
+    ///
+    /// The subscript of the outermost dimension is the Quotient: [j+k].
+    ///
+    /// Overall, we have: A[][n][m], and the access function: A[j+k][2i][5i].
+    void delinearize(const SCEV *Expr,
+                     SmallVectorImpl<const SCEV *> &Subscripts,
+                     SmallVectorImpl<const SCEV *> &Sizes,
+                     const SCEV *ElementSize);
+
   private:
     /// Compute the backedge taken count knowing the interval difference, the
     /// stride and presence of the equality in the comparison.
@@ -981,6 +1061,6 @@ namespace llvm {
     /// to locate them all and call their destructors.
     SCEVUnknown *FirstUnknown;
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/ScalarEvolutionExpander.h b/include/llvm/Analysis/ScalarEvolutionExpander.h
index 83493fad713b..8ec2078258d1 100644
--- a/include/llvm/Analysis/ScalarEvolutionExpander.h
+++ b/include/llvm/Analysis/ScalarEvolutionExpander.h
@@ -275,6 +275,6 @@ namespace llvm {
     Value *expandIVInc(PHINode *PN, Value *StepV, const Loop *L,
                        Type *ExpandTy, Type *IntTy, bool useSubtract);
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/ScalarEvolutionExpressions.h b/include/llvm/Analysis/ScalarEvolutionExpressions.h
index 14feeed5c5dd..da24de281d47 100644
--- a/include/llvm/Analysis/ScalarEvolutionExpressions.h
+++ b/include/llvm/Analysis/ScalarEvolutionExpressions.h
@@ -356,84 +356,6 @@ namespace llvm {
     static inline bool classof(const SCEV *S) {
       return S->getSCEVType() == scAddRecExpr;
     }
-
-    /// Collect parametric terms occurring in step expressions.
-    void collectParametricTerms(ScalarEvolution &SE,
-                                SmallVectorImpl<const SCEV *> &Terms) const;
-
-    /// Return in Subscripts the access functions for each dimension in Sizes.
-    void computeAccessFunctions(ScalarEvolution &SE,
-                                SmallVectorImpl<const SCEV *> &Subscripts,
-                                SmallVectorImpl<const SCEV *> &Sizes) const;
-
-    /// Split this SCEVAddRecExpr into two vectors of SCEVs representing the
-    /// subscripts and sizes of an array access.
-    ///
-    /// The delinearization is a 3 step process: the first two steps compute the
-    /// sizes of each subscript and the third step computes the access functions
-    /// for the delinearized array:
-    ///
-    /// 1. Find the terms in the step functions
-    /// 2. Compute the array size
-    /// 3. Compute the access function: divide the SCEV by the array size
-    ///    starting with the innermost dimensions found in step 2. The Quotient
-    ///    is the SCEV to be divided in the next step of the recursion. The
-    ///    Remainder is the subscript of the innermost dimension. Loop over all
-    ///    array dimensions computed in step 2.
-    ///
-    /// To compute a uniform array size for several memory accesses to the same
-    /// object, one can collect in step 1 all the step terms for all the memory
-    /// accesses, and compute in step 2 a unique array shape. This guarantees
-    /// that the array shape will be the same across all memory accesses.
-    ///
-    /// FIXME: We could derive the result of steps 1 and 2 from a description of
-    /// the array shape given in metadata.
-    ///
-    /// Example:
-    ///
-    /// A[][n][m]
-    ///
-    /// for i
-    ///   for j
-    ///     for k
-    ///       A[j+k][2i][5i] =
-    ///
-    /// The initial SCEV:
-    ///
-    /// A[{{{0,+,2*m+5}_i, +, n*m}_j, +, n*m}_k]
-    ///
-    /// 1. Find the different terms in the step functions:
-    /// -> [2*m, 5, n*m, n*m]
-    ///
-    /// 2. Compute the array size: sort and unique them
-    /// -> [n*m, 2*m, 5]
-    /// find the GCD of all the terms = 1
-    /// divide by the GCD and erase constant terms
-    /// -> [n*m, 2*m]
-    /// GCD = m
-    /// divide by GCD -> [n, 2]
-    /// remove constant terms
-    /// -> [n]
-    /// size of the array is A[unknown][n][m]
-    ///
-    /// 3. Compute the access function
-    /// a. Divide {{{0,+,2*m+5}_i, +, n*m}_j, +, n*m}_k by the innermost size m
-    /// Quotient: {{{0,+,2}_i, +, n}_j, +, n}_k
-    /// Remainder: {{{0,+,5}_i, +, 0}_j, +, 0}_k
-    /// The remainder is the subscript of the innermost array dimension: [5i].
-    ///
-    /// b. Divide Quotient: {{{0,+,2}_i, +, n}_j, +, n}_k by next outer size n
-    /// Quotient: {{{0,+,0}_i, +, 1}_j, +, 1}_k
-    /// Remainder: {{{0,+,2}_i, +, 0}_j, +, 0}_k
-    /// The Remainder is the subscript of the next array dimension: [2i].
-    ///
-    /// The subscript of the outermost dimension is the Quotient: [j+k].
-    ///
-    /// Overall, we have: A[][n][m], and the access function: A[j+k][2i][5i].
-    void delinearize(ScalarEvolution &SE,
-                     SmallVectorImpl<const SCEV *> &Subscripts,
-                     SmallVectorImpl<const SCEV *> &Sizes,
-                     const SCEV *ElementSize) const;
   };
 
   //===--------------------------------------------------------------------===//
@@ -829,6 +751,6 @@ static inline const SCEV *apply(const SCEV *Scev, LoopToScevMapT &Map,
   return SCEVApplyRewriter::rewrite(Scev, Map, SE);
 }
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/ScalarEvolutionNormalization.h b/include/llvm/Analysis/ScalarEvolutionNormalization.h
index 4133864cc3c3..7c6423a21cfa 100644
--- a/include/llvm/Analysis/ScalarEvolutionNormalization.h
+++ b/include/llvm/Analysis/ScalarEvolutionNormalization.h
@@ -73,6 +73,6 @@ const SCEV *TransformForPostIncUse(TransformKind Kind,
                                    ScalarEvolution &SE,
                                    DominatorTree &DT);
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/TargetFolder.h b/include/llvm/Analysis/TargetFolder.h
index 0e17a58069d7..12bf9fe78a47 100644
--- a/include/llvm/Analysis/TargetFolder.h
+++ b/include/llvm/Analysis/TargetFolder.h
@@ -265,6 +265,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/TargetTransformInfo.h b/include/llvm/Analysis/TargetTransformInfo.h
index d863b4f76880..bb6e266b1f5b 100644
--- a/include/llvm/Analysis/TargetTransformInfo.h
+++ b/include/llvm/Analysis/TargetTransformInfo.h
@@ -519,6 +519,11 @@ public:
   Value *getOrCreateResultFromMemIntrinsic(IntrinsicInst *Inst,
                                            Type *ExpectedType) const;
 
+  /// \returns True if the two functions have compatible attributes for inlining
+  /// purposes.
+  bool hasCompatibleFunctionAttributes(const Function *Caller,
+                                       const Function *Callee) const;
+
   /// @}
 
 private:
@@ -619,6 +624,8 @@ public:
                                   MemIntrinsicInfo &Info) = 0;
   virtual Value *getOrCreateResultFromMemIntrinsic(IntrinsicInst *Inst,
                                                    Type *ExpectedType) = 0;
+  virtual bool hasCompatibleFunctionAttributes(const Function *Caller,
+                                               const Function *Callee) const = 0;
 };
 
 template <typename T>
@@ -804,6 +811,10 @@ public:
                                            Type *ExpectedType) override {
     return Impl.getOrCreateResultFromMemIntrinsic(Inst, ExpectedType);
   }
+  bool hasCompatibleFunctionAttributes(const Function *Caller,
+                                       const Function *Callee) const override {
+    return Impl.hasCompatibleFunctionAttributes(Caller, Callee);
+  }
 };
 
 template <typename T>
@@ -908,6 +919,6 @@ public:
 /// clients.
 ImmutablePass *createTargetTransformInfoWrapperPass(TargetIRAnalysis TIRA);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Analysis/TargetTransformInfoImpl.h b/include/llvm/Analysis/TargetTransformInfoImpl.h
index 59b95a8da1e8..403175acae02 100644
--- a/include/llvm/Analysis/TargetTransformInfoImpl.h
+++ b/include/llvm/Analysis/TargetTransformInfoImpl.h
@@ -335,6 +335,14 @@ public:
                                            Type *ExpectedType) {
     return nullptr;
   }
+
+  bool hasCompatibleFunctionAttributes(const Function *Caller,
+                                       const Function *Callee) const {
+    return (Caller->getFnAttribute("target-cpu") ==
+            Callee->getFnAttribute("target-cpu")) &&
+           (Caller->getFnAttribute("target-features") ==
+            Callee->getFnAttribute("target-features"));
+  }
 };
 
 /// \brief CRTP base class for use as a mix-in that aids implementing
@@ -446,6 +454,6 @@ public:
         U->getNumOperands() == 1 ? U->getOperand(0)->getType() : nullptr);
   }
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Analysis/VectorUtils.h b/include/llvm/Analysis/VectorUtils.h
new file mode 100644
index 000000000000..aa538ecc0137
--- /dev/null
+++ b/include/llvm/Analysis/VectorUtils.h
@@ -0,0 +1,56 @@
+//===- llvm/Transforms/Utils/VectorUtils.h - Vector utilities -*- C++ -*-=====//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines some vectorizer utilities.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_UTILS_VECTORUTILS_H
+#define LLVM_TRANSFORMS_UTILS_VECTORUTILS_H
+
+#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Intrinsics.h"
+
+namespace llvm {
+
+/// \brief Identify if the intrinsic is trivially vectorizable.
+/// This method returns true if the intrinsic's argument types are all
+/// scalars for the scalar form of the intrinsic and all vectors for
+/// the vector form of the intrinsic.
+bool isTriviallyVectorizable(Intrinsic::ID ID);
+
+/// \brief Identifies if the intrinsic has a scalar operand. It checks for
+/// ctlz,cttz and powi special intrinsics whose argument is scalar.
+bool hasVectorInstrinsicScalarOpd(Intrinsic::ID ID, unsigned ScalarOpdIdx);
+
+/// \brief Identify if call has a unary float signature
+/// It returns input intrinsic ID if call has a single argument,
+/// argument type and call instruction type should be floating
+/// point type and call should only reads memory.
+/// else return not_intrinsic.
+Intrinsic::ID checkUnaryFloatSignature(const CallInst &I,
+                                       Intrinsic::ID ValidIntrinsicID);
+
+/// \brief Identify if call has a binary float signature
+/// It returns input intrinsic ID if call has two arguments,
+/// arguments type and call instruction type should be floating
+/// point type and call should only reads memory.
+/// else return not_intrinsic.
+Intrinsic::ID checkBinaryFloatSignature(const CallInst &I,
+                                        Intrinsic::ID ValidIntrinsicID);
+
+/// \brief Returns intrinsic ID for call.
+/// For the input call instruction it finds mapping intrinsic and returns
+/// its intrinsic ID, in case it does not found it return not_intrinsic.
+Intrinsic::ID getIntrinsicIDForCall(CallInst *CI, const TargetLibraryInfo *TLI);
+
+} // llvm namespace
+
+#endif
diff --git a/include/llvm/AsmParser/Parser.h b/include/llvm/AsmParser/Parser.h
index 0c37a9b57069..52151409f946 100644
--- a/include/llvm/AsmParser/Parser.h
+++ b/include/llvm/AsmParser/Parser.h
@@ -18,55 +18,67 @@
 
 namespace llvm {
 
+class LLVMContext;
 class Module;
+struct SlotMapping;
 class SMDiagnostic;
-class LLVMContext;
 
 /// This function is the main interface to the LLVM Assembly Parser. It parses
 /// an ASCII file that (presumably) contains LLVM Assembly code. It returns a
 /// Module (intermediate representation) with the corresponding features. Note
 /// that this does not verify that the generated Module is valid, so you should
 /// run the verifier after parsing the file to check that it is okay.
-/// @brief Parse LLVM Assembly from a file
-/// @param Filename The name of the file to parse
-/// @param Error Error result info.
-/// @param Context Context in which to allocate globals info.
+/// \brief Parse LLVM Assembly from a file
+/// \param Filename The name of the file to parse
+/// \param Error Error result info.
+/// \param Context Context in which to allocate globals info.
+/// \param Slots The optional slot mapping that will be initialized during
+///              parsing.
 std::unique_ptr<Module> parseAssemblyFile(StringRef Filename,
                                           SMDiagnostic &Error,
-                                          LLVMContext &Context);
+                                          LLVMContext &Context,
+                                          SlotMapping *Slots = nullptr);
 
 /// The function is a secondary interface to the LLVM Assembly Parser. It parses
 /// an ASCII string that (presumably) contains LLVM Assembly code. It returns a
 /// Module (intermediate representation) with the corresponding features. Note
 /// that this does not verify that the generated Module is valid, so you should
 /// run the verifier after parsing the file to check that it is okay.
-/// @brief Parse LLVM Assembly from a string
-/// @param AsmString The string containing assembly
-/// @param Error Error result info.
-/// @param Context Context in which to allocate globals info.
+/// \brief Parse LLVM Assembly from a string
+/// \param AsmString The string containing assembly
+/// \param Error Error result info.
+/// \param Context Context in which to allocate globals info.
+/// \param Slots The optional slot mapping that will be initialized during
+///              parsing.
 std::unique_ptr<Module> parseAssemblyString(StringRef AsmString,
                                             SMDiagnostic &Error,
-                                            LLVMContext &Context);
+                                            LLVMContext &Context,
+                                            SlotMapping *Slots = nullptr);
 
 /// parseAssemblyFile and parseAssemblyString are wrappers around this function.
-/// @brief Parse LLVM Assembly from a MemoryBuffer.
-/// @param F The MemoryBuffer containing assembly
-/// @param Err Error result info.
-/// @param Context Context in which to allocate globals info.
+/// \brief Parse LLVM Assembly from a MemoryBuffer.
+/// \param F The MemoryBuffer containing assembly
+/// \param Err Error result info.
+/// \param Slots The optional slot mapping that will be initialized during
+///              parsing.
 std::unique_ptr<Module> parseAssembly(MemoryBufferRef F, SMDiagnostic &Err,
-                                      LLVMContext &Context);
+                                      LLVMContext &Context,
+                                      SlotMapping *Slots = nullptr);
 
 /// This function is the low-level interface to the LLVM Assembly Parser.
 /// This is kept as an independent function instead of being inlined into
 /// parseAssembly for the convenience of interactive users that want to add
 /// recently parsed bits to an existing module.
 ///
-/// @param F The MemoryBuffer containing assembly
-/// @param M The module to add data to.
-/// @param Err Error result info.
-/// @return true on error.
-bool parseAssemblyInto(MemoryBufferRef F, Module &M, SMDiagnostic &Err);
+/// \param F The MemoryBuffer containing assembly
+/// \param M The module to add data to.
+/// \param Err Error result info.
+/// \param Slots The optional slot mapping that will be initialized during
+///              parsing.
+/// \return true on error.
+bool parseAssemblyInto(MemoryBufferRef F, Module &M, SMDiagnostic &Err,
+                       SlotMapping *Slots = nullptr);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/AsmParser/SlotMapping.h b/include/llvm/AsmParser/SlotMapping.h
new file mode 100644
index 000000000000..c5f61d25c3a8
--- /dev/null
+++ b/include/llvm/AsmParser/SlotMapping.h
@@ -0,0 +1,34 @@
+//===-- SlotMapping.h - Slot number mapping for unnamed values --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the declaration of the SlotMapping struct.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ASMPARSER_SLOTMAPPING_H
+#define LLVM_ASMPARSER_SLOTMAPPING_H
+
+#include "llvm/IR/TrackingMDRef.h"
+#include <map>
+#include <vector>
+
+namespace llvm {
+
+class GlobalValue;
+
+/// This struct contains the mapping from the slot numbers to unnamed metadata
+/// nodes and global values.
+struct SlotMapping {
+  std::vector<GlobalValue *> GlobalValues;
+  std::map<unsigned, TrackingMDNodeRef> MetadataNodes;
+};
+
+} // end namespace llvm
+
+#endif
diff --git a/include/llvm/Bitcode/BitCodes.h b/include/llvm/Bitcode/BitCodes.h
index 6b23eb966ed9..96c420151858 100644
--- a/include/llvm/Bitcode/BitCodes.h
+++ b/include/llvm/Bitcode/BitCodes.h
@@ -77,7 +77,7 @@ namespace bitc {
                                       //                             [id, name]
   };
 
-} // namespace bitc
+} // End bitc namespace
 
 /// BitCodeAbbrevOp - This describes one or more operands in an abbreviation.
 /// This is actually a union of two different things:
@@ -180,6 +180,6 @@ public:
     OperandList.push_back(OpInfo);
   }
 };
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Bitcode/BitcodeWriterPass.h b/include/llvm/Bitcode/BitcodeWriterPass.h
index cc742f19b590..ae915c688ba0 100644
--- a/include/llvm/Bitcode/BitcodeWriterPass.h
+++ b/include/llvm/Bitcode/BitcodeWriterPass.h
@@ -56,6 +56,6 @@ public:
   static StringRef name() { return "BitcodeWriterPass"; }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Bitcode/BitstreamReader.h b/include/llvm/Bitcode/BitstreamReader.h
index 9201daf936d7..4c040a7f3e22 100644
--- a/include/llvm/Bitcode/BitstreamReader.h
+++ b/include/llvm/Bitcode/BitstreamReader.h
@@ -512,6 +512,6 @@ public:
   bool ReadBlockInfoBlock();
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Bitcode/BitstreamWriter.h b/include/llvm/Bitcode/BitstreamWriter.h
index eef6076d6a45..9f23023a1419 100644
--- a/include/llvm/Bitcode/BitstreamWriter.h
+++ b/include/llvm/Bitcode/BitstreamWriter.h
@@ -520,6 +520,6 @@ public:
 };
 
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Bitcode/LLVMBitCodes.h b/include/llvm/Bitcode/LLVMBitCodes.h
index 41aa148b2564..605c4172dd87 100644
--- a/include/llvm/Bitcode/LLVMBitCodes.h
+++ b/include/llvm/Bitcode/LLVMBitCodes.h
@@ -167,6 +167,7 @@ namespace bitc {
     METADATA_EXPRESSION    = 29,  // [distinct, n x element]
     METADATA_OBJC_PROPERTY = 30,  // [distinct, name, file, line, ...]
     METADATA_IMPORTED_ENTITY=31,  // [distinct, tag, scope, entity, line, name]
+    METADATA_MODULE=32,           // [distinct, scope, name, ...]
   };
 
   // The constants block (CONSTANTS_BLOCK_ID) describes emission for each
@@ -416,7 +417,7 @@ namespace bitc {
     COMDAT_SELECTION_KIND_SAME_SIZE = 5,
   };
 
-} // namespace bitc
-} // namespace llvm
+} // End bitc namespace
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Bitcode/ReaderWriter.h b/include/llvm/Bitcode/ReaderWriter.h
index d158569b810a..6797aa133c42 100644
--- a/include/llvm/Bitcode/ReaderWriter.h
+++ b/include/llvm/Bitcode/ReaderWriter.h
@@ -166,7 +166,7 @@ namespace llvm {
     }
   };
 
-} // namespace llvm
+} // End llvm namespace
 
 namespace std {
 template <> struct is_error_code_enum<llvm::BitcodeError> : std::true_type {};
diff --git a/include/llvm/CodeGen/Analysis.h b/include/llvm/CodeGen/Analysis.h
index 96e955467010..c4b94ede4f55 100644
--- a/include/llvm/CodeGen/Analysis.h
+++ b/include/llvm/CodeGen/Analysis.h
@@ -115,6 +115,6 @@ bool returnTypeIsEligibleForTailCall(const Function *F,
 // or we are in LTO.
 bool canBeOmittedFromSymbolTable(const GlobalValue *GV);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/AsmPrinter.h b/include/llvm/CodeGen/AsmPrinter.h
index 8a0989f1782c..fe7efae325c4 100644
--- a/include/llvm/CodeGen/AsmPrinter.h
+++ b/include/llvm/CodeGen/AsmPrinter.h
@@ -535,6 +535,6 @@ private:
   void EmitXXStructorList(const Constant *List, bool isCtor);
   GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy &C);
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/BasicTTIImpl.h b/include/llvm/CodeGen/BasicTTIImpl.h
index cb61cc7fd50e..3e464f4f1e5a 100644
--- a/include/llvm/CodeGen/BasicTTIImpl.h
+++ b/include/llvm/CodeGen/BasicTTIImpl.h
@@ -830,6 +830,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/CalcSpillWeights.h b/include/llvm/CodeGen/CalcSpillWeights.h
index 7c9019063080..91fb0a9d7e77 100644
--- a/include/llvm/CodeGen/CalcSpillWeights.h
+++ b/include/llvm/CodeGen/CalcSpillWeights.h
@@ -74,6 +74,6 @@ namespace llvm {
                                      const MachineBlockFrequencyInfo &MBFI,
                                      VirtRegAuxInfo::NormalizingFn norm =
                                          normalizeSpillWeight);
-} // namespace llvm
+}
 
 #endif // LLVM_CODEGEN_CALCSPILLWEIGHTS_H
diff --git a/include/llvm/CodeGen/CommandFlags.h b/include/llvm/CodeGen/CommandFlags.h
index 3c3f770f92b5..554511d6f4ab 100644
--- a/include/llvm/CodeGen/CommandFlags.h
+++ b/include/llvm/CodeGen/CommandFlags.h
@@ -17,6 +17,8 @@
 #define LLVM_CODEGEN_COMMANDFLAGS_H
 
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Intrinsics.h"
 #include "llvm/IR/Module.h"
 #include "llvm/MC/MCTargetOptionsCommandFlags.h"
 #include "llvm//MC/SubtargetFeature.h"
@@ -249,7 +251,6 @@ static inline TargetOptions InitTargetOptionsFromCodeGenFlags() {
   Options.NoZerosInBSS = DontPlaceZerosInBSS;
   Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
   Options.StackAlignmentOverride = OverrideStackAlignment;
-  Options.TrapFuncName = TrapFuncName;
   Options.PositionIndependentExecutable = EnablePIE;
   Options.UseInitArray = !UseCtors;
   Options.DataSections = DataSections;
@@ -320,6 +321,16 @@ static inline void setFunctionAttributes(StringRef CPU, StringRef Features,
                                        "disable-tail-calls",
                                        toStringRef(DisableTailCalls));
 
+    if (TrapFuncName.getNumOccurrences() > 0)
+      for (auto &B : F)
+        for (auto &I : B)
+          if (auto *Call = dyn_cast<CallInst>(&I))
+            if (const auto *F = Call->getCalledFunction())
+              if (F->getIntrinsicID() == Intrinsic::debugtrap ||
+                  F->getIntrinsicID() == Intrinsic::trap)
+                Call->addAttribute(llvm::AttributeSet::FunctionIndex,
+                                   "trap-func-name", TrapFuncName);
+
     // Let NewAttrs override Attrs.
     NewAttrs = Attrs.addAttributes(Ctx, AttributeSet::FunctionIndex, NewAttrs);
     F.setAttributes(NewAttrs);
diff --git a/include/llvm/CodeGen/DFAPacketizer.h b/include/llvm/CodeGen/DFAPacketizer.h
index ccff3883f2bb..c44a7e0b6736 100644
--- a/include/llvm/CodeGen/DFAPacketizer.h
+++ b/include/llvm/CodeGen/DFAPacketizer.h
@@ -91,7 +91,7 @@ public:
 // API call is made to prune the dependence.
 class VLIWPacketizerList {
 protected:
-  const MachineFunction &MF;
+  MachineFunction &MF;
   const TargetInstrInfo *TII;
 
   // The VLIW Scheduler.
@@ -159,6 +159,6 @@ public:
   }
 
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/DIE.h b/include/llvm/CodeGen/DIE.h
index 1ea3217978d1..f07712a676da 100644
--- a/include/llvm/CodeGen/DIE.h
+++ b/include/llvm/CodeGen/DIE.h
@@ -15,6 +15,8 @@
 #define LLVM_LIB_CODEGEN_ASMPRINTER_DIE_H
 
 #include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/PointerIntPair.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/CodeGen/DwarfStringPoolEntry.h"
 #include "llvm/Support/Dwarf.h"
@@ -436,11 +438,11 @@ public:
 
   /// EmitValue - Emit value via the Dwarf writer.
   ///
-  void EmitValue(const AsmPrinter *AP, dwarf::Form Form) const;
+  void EmitValue(const AsmPrinter *AP) const;
 
   /// SizeOf - Return the size of a value in bytes.
   ///
-  unsigned SizeOf(const AsmPrinter *AP, dwarf::Form Form) const;
+  unsigned SizeOf(const AsmPrinter *AP) const;
 
 #ifndef NDEBUG
   void print(raw_ostream &O) const;
@@ -448,10 +450,179 @@ public:
 #endif
 };
 
+struct IntrusiveBackListNode {
+  PointerIntPair<IntrusiveBackListNode *, 1> Next;
+  IntrusiveBackListNode() : Next(this, true) {}
+
+  IntrusiveBackListNode *getNext() const {
+    return Next.getInt() ? nullptr : Next.getPointer();
+  }
+};
+
+struct IntrusiveBackListBase {
+  typedef IntrusiveBackListNode Node;
+  Node *Last = nullptr;
+
+  bool empty() const { return !Last; }
+  void push_back(Node &N) {
+    assert(N.Next.getPointer() == &N && "Expected unlinked node");
+    assert(N.Next.getInt() == true && "Expected unlinked node");
+
+    if (Last) {
+      N.Next = Last->Next;
+      Last->Next.setPointerAndInt(&N, false);
+    }
+    Last = &N;
+  }
+};
+
+template <class T> class IntrusiveBackList : IntrusiveBackListBase {
+public:
+  using IntrusiveBackListBase::empty;
+  void push_back(T &N) { IntrusiveBackListBase::push_back(N); }
+  T &back() { return *static_cast<T *>(Last); }
+  const T &back() const { return *static_cast<T *>(Last); }
+
+  class const_iterator;
+  class iterator
+      : public iterator_facade_base<iterator, std::forward_iterator_tag, T> {
+    friend class const_iterator;
+    Node *N = nullptr;
+
+  public:
+    iterator() = default;
+    explicit iterator(T *N) : N(N) {}
+
+    iterator &operator++() {
+      N = N->getNext();
+      return *this;
+    }
+
+    explicit operator bool() const { return N; }
+    T &operator*() const { return *static_cast<T *>(N); }
+
+    bool operator==(const iterator &X) const { return N == X.N; }
+    bool operator!=(const iterator &X) const { return N != X.N; }
+  };
+
+  class const_iterator
+      : public iterator_facade_base<const_iterator, std::forward_iterator_tag,
+                                    const T> {
+    const Node *N = nullptr;
+
+  public:
+    const_iterator() = default;
+    // Placate MSVC by explicitly scoping 'iterator'.
+    const_iterator(typename IntrusiveBackList<T>::iterator X) : N(X.N) {}
+    explicit const_iterator(const T *N) : N(N) {}
+
+    const_iterator &operator++() {
+      N = N->getNext();
+      return *this;
+    }
+
+    explicit operator bool() const { return N; }
+    const T &operator*() const { return *static_cast<const T *>(N); }
+
+    bool operator==(const const_iterator &X) const { return N == X.N; }
+    bool operator!=(const const_iterator &X) const { return N != X.N; }
+  };
+
+  iterator begin() {
+    return Last ? iterator(static_cast<T *>(Last->Next.getPointer())) : end();
+  }
+  const_iterator begin() const {
+    return const_cast<IntrusiveBackList *>(this)->begin();
+  }
+  iterator end() { return iterator(); }
+  const_iterator end() const { return const_iterator(); }
+
+  static iterator toIterator(T &N) { return iterator(&N); }
+  static const_iterator toIterator(const T &N) { return const_iterator(&N); }
+};
+
+/// A list of DIE values.
+///
+/// This is a singly-linked list, but instead of reversing the order of
+/// insertion, we keep a pointer to the back of the list so we can push in
+/// order.
+///
+/// There are two main reasons to choose a linked list over a customized
+/// vector-like data structure.
+///
+///  1. For teardown efficiency, we want DIEs to be BumpPtrAllocated.  Using a
+///     linked list here makes this way easier to accomplish.
+///  2. Carrying an extra pointer per \a DIEValue isn't expensive.  45% of DIEs
+///     have 2 or fewer values, and 90% have 5 or fewer.  A vector would be
+///     over-allocated by 50% on average anyway, the same cost as the
+///     linked-list node.
+class DIEValueList {
+  struct Node : IntrusiveBackListNode {
+    DIEValue V;
+    explicit Node(DIEValue V) : V(V) {}
+  };
+
+  typedef IntrusiveBackList<Node> ListTy;
+  ListTy List;
+
+public:
+  bool empty() const { return List.empty(); }
+
+  class const_iterator;
+  class iterator
+      : public iterator_adaptor_base<iterator, ListTy::iterator,
+                                     std::forward_iterator_tag, DIEValue> {
+    friend class const_iterator;
+    typedef iterator_adaptor_base<iterator, ListTy::iterator,
+                                  std::forward_iterator_tag,
+                                  DIEValue> iterator_adaptor;
+
+  public:
+    iterator() = default;
+    explicit iterator(ListTy::iterator X) : iterator_adaptor(X) {}
+
+    explicit operator bool() const { return bool(wrapped()); }
+    DIEValue &operator*() const { return wrapped()->V; }
+  };
+
+  class const_iterator
+      : public iterator_adaptor_base<const_iterator, ListTy::const_iterator,
+                                     std::forward_iterator_tag,
+                                     const DIEValue> {
+    typedef iterator_adaptor_base<const_iterator, ListTy::const_iterator,
+                                  std::forward_iterator_tag,
+                                  const DIEValue> iterator_adaptor;
+
+  public:
+    const_iterator() = default;
+    const_iterator(DIEValueList::iterator X) : iterator_adaptor(X.wrapped()) {}
+    explicit const_iterator(ListTy::const_iterator X) : iterator_adaptor(X) {}
+
+    explicit operator bool() const { return bool(wrapped()); }
+    const DIEValue &operator*() const { return wrapped()->V; }
+  };
+
+  iterator insert(BumpPtrAllocator &Alloc, DIEValue V) {
+    List.push_back(*new (Alloc) Node(V));
+    return iterator(ListTy::toIterator(List.back()));
+  }
+  template <class... Ts>
+  iterator emplace(BumpPtrAllocator &Alloc, Ts &&... Args) {
+    return insert(Alloc, DIEValue(std::forward<Ts>(Args)...));
+  }
+
+  iterator begin() { return iterator(List.begin()); }
+  iterator end() { return iterator(List.end()); }
+  const_iterator begin() const { return const_iterator(List.begin()); }
+  const_iterator end() const { return const_iterator(List.end()); }
+};
+
 //===--------------------------------------------------------------------===//
 /// DIE - A structured debug information entry.  Has an abbreviation which
 /// describes its organization.
-class DIE {
+class DIE : IntrusiveBackListNode {
+  friend class IntrusiveBackList<DIE>;
+
 protected:
   /// Offset - Offset in debug info section.
   ///
@@ -468,27 +639,24 @@ protected:
   dwarf::Tag Tag = (dwarf::Tag)0;
 
   /// Children DIEs.
-  ///
-  // This can't be a vector<DIE> because pointer validity is requirent for the
-  // Parent pointer and DIEEntry.
-  // It can't be a list<DIE> because some clients need pointer validity before
-  // the object has been added to any child list
-  // (eg: DwarfUnit::constructVariableDIE). These aren't insurmountable, but may
-  // be more convoluted than beneficial.
-  std::vector<std::unique_ptr<DIE>> Children;
+  IntrusiveBackList<DIE> Children;
 
-  DIE *Parent;
+  DIE *Parent = nullptr;
 
   /// Attribute values.
   ///
-  SmallVector<DIEValue, 12> Values;
+  DIEValueList Values;
 
 protected:
-  DIE() : Offset(0), Size(0), Parent(nullptr) {}
+  DIE() : Offset(0), Size(0) {}
+
+private:
+  explicit DIE(dwarf::Tag Tag) : Offset(0), Size(0), Tag(Tag) {}
 
 public:
-  explicit DIE(dwarf::Tag Tag)
-      : Offset(0), Size(0), Tag(Tag), Parent(nullptr) {}
+  static DIE *get(BumpPtrAllocator &Alloc, dwarf::Tag Tag) {
+    return new (Alloc) DIE(Tag);
+  }
 
   // Accessors.
   unsigned getAbbrevNumber() const { return AbbrevNumber; }
@@ -497,26 +665,32 @@ public:
   unsigned getSize() const { return Size; }
   bool hasChildren() const { return !Children.empty(); }
 
-  typedef std::vector<std::unique_ptr<DIE>>::const_iterator child_iterator;
+  typedef IntrusiveBackList<DIE>::iterator child_iterator;
+  typedef IntrusiveBackList<DIE>::const_iterator const_child_iterator;
   typedef iterator_range<child_iterator> child_range;
+  typedef iterator_range<const_child_iterator> const_child_range;
 
-  child_range children() const {
+  child_range children() {
+    return llvm::make_range(Children.begin(), Children.end());
+  }
+  const_child_range children() const {
     return llvm::make_range(Children.begin(), Children.end());
   }
 
-  typedef SmallVectorImpl<DIEValue>::const_iterator value_iterator;
+  typedef DIEValueList::iterator value_iterator;
   typedef iterator_range<value_iterator> value_range;
 
-  value_iterator values_begin() const { return Values.begin(); }
-  value_iterator values_end() const { return Values.end(); }
-  value_range values() const {
-    return llvm::make_range(values_begin(), values_end());
+  value_range values() {
+    return llvm::make_range(Values.begin(), Values.end());
   }
 
-  void setValue(unsigned I, DIEValue New) {
-    assert(I < Values.size());
-    Values[I] = New;
+  typedef DIEValueList::const_iterator const_value_iterator;
+  typedef iterator_range<const_value_iterator> const_value_range;
+
+  const_value_range values() const {
+    return llvm::make_range(Values.begin(), Values.end());
   }
+
   DIE *getParent() const { return Parent; }
 
   /// Generate the abbreviation for this DIE.
@@ -539,19 +713,21 @@ public:
 
   /// addValue - Add a value and attributes to a DIE.
   ///
-  void addValue(DIEValue Value) { Values.push_back(Value); }
+  value_iterator addValue(BumpPtrAllocator &Alloc, DIEValue Value) {
+    return Values.insert(Alloc, Value);
+  }
   template <class T>
-  void addValue(dwarf::Attribute Attribute, dwarf::Form Form, T &&Value) {
-    Values.emplace_back(Attribute, Form, std::forward<T>(Value));
+  value_iterator addValue(BumpPtrAllocator &Alloc, dwarf::Attribute Attribute,
+                          dwarf::Form Form, T &&Value) {
+    return Values.emplace(Alloc, Attribute, Form, std::forward<T>(Value));
   }
 
-  /// addChild - Add a child to the DIE.
-  ///
-  DIE &addChild(std::unique_ptr<DIE> Child) {
-    assert(!Child->getParent());
+  /// Add a child to the DIE.
+  DIE &addChild(DIE *Child) {
+    assert(!Child->getParent() && "Child should be orphaned");
     Child->Parent = this;
-    Children.push_back(std::move(Child));
-    return *Children.back();
+    Children.push_back(*Child);
+    return Children.back();
   }
 
   /// Find a value in the DIE with the attribute given.
@@ -635,6 +811,6 @@ public:
 #endif
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/FastISel.h b/include/llvm/CodeGen/FastISel.h
index 1dca2ce1ab22..f04a7cd69664 100644
--- a/include/llvm/CodeGen/FastISel.h
+++ b/include/llvm/CodeGen/FastISel.h
@@ -69,7 +69,7 @@ public:
     unsigned NumFixedArgs;
     CallingConv::ID CallConv;
     const Value *Callee;
-    const char *SymName;
+    MCSymbol *Symbol;
     ArgListTy Args;
     ImmutableCallSite *CS;
     MachineInstr *Call;
@@ -88,7 +88,7 @@ public:
         : RetTy(nullptr), RetSExt(false), RetZExt(false), IsVarArg(false),
           IsInReg(false), DoesNotReturn(false), IsReturnValueUsed(true),
           IsTailCall(false), NumFixedArgs(-1), CallConv(CallingConv::C),
-          Callee(nullptr), SymName(nullptr), CS(nullptr), Call(nullptr),
+          Callee(nullptr), Symbol(nullptr), CS(nullptr), Call(nullptr),
           ResultReg(0), NumResultRegs(0), IsPatchPoint(false) {}
 
     CallLoweringInfo &setCallee(Type *ResultTy, FunctionType *FuncTy,
@@ -114,12 +114,12 @@ public:
     }
 
     CallLoweringInfo &setCallee(Type *ResultTy, FunctionType *FuncTy,
-                                const char *Target, ArgListTy &&ArgsList,
+                                MCSymbol *Target, ArgListTy &&ArgsList,
                                 ImmutableCallSite &Call,
                                 unsigned FixedArgs = ~0U) {
       RetTy = ResultTy;
       Callee = Call.getCalledValue();
-      SymName = Target;
+      Symbol = Target;
 
       IsInReg = Call.paramHasAttr(0, Attribute::InReg);
       DoesNotReturn = Call.doesNotReturn();
@@ -148,11 +148,16 @@ public:
       return *this;
     }
 
-    CallLoweringInfo &setCallee(CallingConv::ID CC, Type *ResultTy,
+    CallLoweringInfo &setCallee(const DataLayout &DL, MCContext &Ctx,
+                                CallingConv::ID CC, Type *ResultTy,
                                 const char *Target, ArgListTy &&ArgsList,
+                                unsigned FixedArgs = ~0U);
+
+    CallLoweringInfo &setCallee(CallingConv::ID CC, Type *ResultTy,
+                                MCSymbol *Target, ArgListTy &&ArgsList,
                                 unsigned FixedArgs = ~0U) {
       RetTy = ResultTy;
-      SymName = Target;
+      Symbol = Target;
       CallConv = CC;
       Args = std::move(ArgsList);
       NumFixedArgs = (FixedArgs == ~0U) ? Args.size() : FixedArgs;
@@ -504,7 +509,9 @@ protected:
 
   CmpInst::Predicate optimizeCmpPredicate(const CmpInst *CI) const;
 
-  bool lowerCallTo(const CallInst *CI, const char *SymName, unsigned NumArgs);
+  bool lowerCallTo(const CallInst *CI, MCSymbol *Symbol, unsigned NumArgs);
+  bool lowerCallTo(const CallInst *CI, const char *SymbolName,
+                   unsigned NumArgs);
   bool lowerCallTo(CallLoweringInfo &CLI);
 
   bool isCommutativeIntrinsic(IntrinsicInst const *II) {
diff --git a/include/llvm/CodeGen/FaultMaps.h b/include/llvm/CodeGen/FaultMaps.h
index d5c2feefaa67..f4b646322143 100644
--- a/include/llvm/CodeGen/FaultMaps.h
+++ b/include/llvm/CodeGen/FaultMaps.h
@@ -1,4 +1,4 @@
-//===------------------- FaultMaps.h - StackMaps ----------------*- C++ -*-===//
+//===------------------- FaultMaps.h - The "FaultMaps" section --*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -12,6 +12,8 @@
 
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Format.h"
 
 #include <vector>
 #include <map>
@@ -68,6 +70,151 @@ private:
 
   void emitFunctionInfo(const MCSymbol *FnLabel, const FunctionFaultInfos &FFI);
 };
+
+/// A parser for the __llvm_faultmaps section generated by the FaultMaps class
+/// above.  This parser is version locked with with the __llvm_faultmaps section
+/// generated by the version of LLVM that includes it.  No guarantees are made
+/// with respect to forward or backward compatibility.
+class FaultMapParser {
+  typedef uint8_t FaultMapVersionType;
+  static const size_t FaultMapVersionOffset = 0;
+
+  typedef uint8_t Reserved0Type;
+  static const size_t Reserved0Offset =
+      FaultMapVersionOffset + sizeof(FaultMapVersionType);
+
+  typedef uint16_t Reserved1Type;
+  static const size_t Reserved1Offset = Reserved0Offset + sizeof(Reserved0Type);
+
+  typedef uint32_t NumFunctionsType;
+  static const size_t NumFunctionsOffset =
+      Reserved1Offset + sizeof(Reserved1Type);
+
+  static const size_t FunctionInfosOffset =
+      NumFunctionsOffset + sizeof(NumFunctionsType);
+
+  const uint8_t *P;
+  const uint8_t *E;
+
+  template <typename T> static T read(const uint8_t *P, const uint8_t *E) {
+    assert(P + sizeof(T) <= E && "out of bounds read!");
+    return support::endian::read<T, support::little, 1>(P);
+  }
+
+public:
+  class FunctionFaultInfoAccessor {
+    typedef uint32_t FaultKindType;
+    static const size_t FaultKindOffset = 0;
+
+    typedef uint32_t FaultingPCOffsetType;
+    static const size_t FaultingPCOffsetOffset =
+        FaultKindOffset + sizeof(FaultKindType);
+
+    typedef uint32_t HandlerPCOffsetType;
+    static const size_t HandlerPCOffsetOffset =
+        FaultingPCOffsetOffset + sizeof(FaultingPCOffsetType);
+
+    const uint8_t *P;
+    const uint8_t *E;
+
+  public:
+    static const size_t Size =
+        HandlerPCOffsetOffset + sizeof(HandlerPCOffsetType);
+
+    explicit FunctionFaultInfoAccessor(const uint8_t *P, const uint8_t *E)
+        : P(P), E(E) {}
+
+    FaultKindType getFaultKind() const {
+      return read<FaultKindType>(P + FaultKindOffset, E);
+    }
+
+    FaultingPCOffsetType getFaultingPCOffset() const {
+      return read<FaultingPCOffsetType>(P + FaultingPCOffsetOffset, E);
+    }
+
+    HandlerPCOffsetType getHandlerPCOffset() const {
+      return read<HandlerPCOffsetType>(P + HandlerPCOffsetOffset, E);
+    }
+  };
+
+  class FunctionInfoAccessor {
+    typedef uint64_t FunctionAddrType;
+    static const size_t FunctionAddrOffset = 0;
+
+    typedef uint32_t NumFaultingPCsType;
+    static const size_t NumFaultingPCsOffset =
+        FunctionAddrOffset + sizeof(FunctionAddrType);
+
+    typedef uint32_t ReservedType;
+    static const size_t ReservedOffset =
+        NumFaultingPCsOffset + sizeof(NumFaultingPCsType);
+
+    static const size_t FunctionFaultInfosOffset =
+        ReservedOffset + sizeof(ReservedType);
+
+    static const size_t FunctionInfoHeaderSize = FunctionFaultInfosOffset;
+
+    const uint8_t *P;
+    const uint8_t *E;
+
+  public:
+    FunctionInfoAccessor() : P(nullptr), E(nullptr) {}
+
+    explicit FunctionInfoAccessor(const uint8_t *P, const uint8_t *E)
+        : P(P), E(E) {}
+
+    FunctionAddrType getFunctionAddr() const {
+      return read<FunctionAddrType>(P + FunctionAddrOffset, E);
+    }
+
+    NumFaultingPCsType getNumFaultingPCs() const {
+      return read<NumFaultingPCsType>(P + NumFaultingPCsOffset, E);
+    }
+
+    FunctionFaultInfoAccessor getFunctionFaultInfoAt(uint32_t Index) const {
+      assert(Index < getNumFaultingPCs() && "index out of bounds!");
+      const uint8_t *Begin = P + FunctionFaultInfosOffset +
+                             FunctionFaultInfoAccessor::Size * Index;
+      return FunctionFaultInfoAccessor(Begin, E);
+    }
+
+    FunctionInfoAccessor getNextFunctionInfo() const {
+      size_t MySize = FunctionInfoHeaderSize +
+                      getNumFaultingPCs() * FunctionFaultInfoAccessor::Size;
+
+      const uint8_t *Begin = P + MySize;
+      assert(Begin < E && "out of bounds!");
+      return FunctionInfoAccessor(Begin, E);
+    }
+  };
+
+  explicit FaultMapParser(const uint8_t *Begin, const uint8_t *End)
+      : P(Begin), E(End) {}
+
+  FaultMapVersionType getFaultMapVersion() const {
+    auto Version = read<FaultMapVersionType>(P + FaultMapVersionOffset, E);
+    assert(Version == 1 && "only version 1 supported!");
+    return Version;
+  }
+
+  NumFunctionsType getNumFunctions() const {
+    return read<NumFunctionsType>(P + NumFunctionsOffset, E);
+  }
+
+  FunctionInfoAccessor getFirstFunctionInfo() const {
+    const uint8_t *Begin = P + FunctionInfosOffset;
+    return FunctionInfoAccessor(Begin, E);
+  }
+};
+
+raw_ostream &
+operator<<(raw_ostream &OS, const FaultMapParser::FunctionFaultInfoAccessor &);
+
+raw_ostream &operator<<(raw_ostream &OS,
+                        const FaultMapParser::FunctionInfoAccessor &);
+
+raw_ostream &operator<<(raw_ostream &OS, const FaultMapParser &);
+
 } // namespace llvm
 
 #endif
diff --git a/include/llvm/CodeGen/GCMetadata.h b/include/llvm/CodeGen/GCMetadata.h
index b34f67a023ca..e883bd196ea3 100644
--- a/include/llvm/CodeGen/GCMetadata.h
+++ b/include/llvm/CodeGen/GCMetadata.h
@@ -201,6 +201,6 @@ public:
   /// will soon change.
   GCFunctionInfo &getFunctionInfo(const Function &F);
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/GCMetadataPrinter.h b/include/llvm/CodeGen/GCMetadataPrinter.h
index e451cd276346..220847029113 100644
--- a/include/llvm/CodeGen/GCMetadataPrinter.h
+++ b/include/llvm/CodeGen/GCMetadataPrinter.h
@@ -59,6 +59,6 @@ public:
 
   virtual ~GCMetadataPrinter();
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/GCStrategy.h b/include/llvm/CodeGen/GCStrategy.h
index 2a4dabb01b9b..a1b8e895898f 100644
--- a/include/llvm/CodeGen/GCStrategy.h
+++ b/include/llvm/CodeGen/GCStrategy.h
@@ -172,6 +172,6 @@ public:
 /// register your GCMetadataPrinter subclass with the
 /// GCMetadataPrinterRegistery as well.
 typedef Registry<GCStrategy> GCRegistry;
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/GCs.h b/include/llvm/CodeGen/GCs.h
index 5418fff0b592..5207f801c84e 100644
--- a/include/llvm/CodeGen/GCs.h
+++ b/include/llvm/CodeGen/GCs.h
@@ -41,6 +41,6 @@ void linkErlangGCPrinter();
 void linkShadowStackGC();
 
 void linkStatepointExampleGC();
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/ISDOpcodes.h b/include/llvm/CodeGen/ISDOpcodes.h
index 5a1cf59024bf..c7237fd55b27 100644
--- a/include/llvm/CodeGen/ISDOpcodes.h
+++ b/include/llvm/CodeGen/ISDOpcodes.h
@@ -124,6 +124,8 @@ namespace ISD {
     TargetExternalSymbol,
     TargetBlockAddress,
 
+    MCSymbol,
+
     /// TargetIndex - Like a constant pool entry, but with completely
     /// target-dependent semantics. Holds target flags, a 32-bit index, and a
     /// 64-bit index. Targets can use this however they like.
@@ -890,8 +892,8 @@ namespace ISD {
     CVT_INVALID /// Marker - Invalid opcode
   };
 
-} // namespace ISD
+} // end llvm::ISD namespace
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/IntrinsicLowering.h b/include/llvm/CodeGen/IntrinsicLowering.h
index a76464522aaa..9e6ab7d45977 100644
--- a/include/llvm/CodeGen/IntrinsicLowering.h
+++ b/include/llvm/CodeGen/IntrinsicLowering.h
@@ -54,6 +54,6 @@ namespace llvm {
     /// simple integer bswap.
     static bool LowerToByteSwap(CallInst *CI);
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/LatencyPriorityQueue.h b/include/llvm/CodeGen/LatencyPriorityQueue.h
index cc33f3491242..f347f66e0981 100644
--- a/include/llvm/CodeGen/LatencyPriorityQueue.h
+++ b/include/llvm/CodeGen/LatencyPriorityQueue.h
@@ -93,6 +93,6 @@ private:
     void AdjustPriorityOfUnscheduledPreds(SUnit *SU);
     SUnit *getSingleUnscheduledPred(SUnit *SU);
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/LexicalScopes.h b/include/llvm/CodeGen/LexicalScopes.h
index 7478c3a678af..7d7e48af2a0f 100644
--- a/include/llvm/CodeGen/LexicalScopes.h
+++ b/include/llvm/CodeGen/LexicalScopes.h
@@ -252,6 +252,6 @@ private:
   LexicalScope *CurrentFnLexicalScope;
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/LiveInterval.h b/include/llvm/CodeGen/LiveInterval.h
index ea44ab10792b..9b8b91c9b80e 100644
--- a/include/llvm/CodeGen/LiveInterval.h
+++ b/include/llvm/CodeGen/LiveInterval.h
@@ -866,5 +866,5 @@ namespace llvm {
 
   };
 
-} // namespace llvm
+}
 #endif
diff --git a/include/llvm/CodeGen/LiveIntervalAnalysis.h b/include/llvm/CodeGen/LiveIntervalAnalysis.h
index 9d688412897c..9673f80e0856 100644
--- a/include/llvm/CodeGen/LiveIntervalAnalysis.h
+++ b/include/llvm/CodeGen/LiveIntervalAnalysis.h
@@ -444,6 +444,6 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
 
     class HMEditor;
   };
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/LivePhysRegs.h b/include/llvm/CodeGen/LivePhysRegs.h
index 6ffd3eeea351..6475e7b4af37 100644
--- a/include/llvm/CodeGen/LivePhysRegs.h
+++ b/include/llvm/CodeGen/LivePhysRegs.h
@@ -116,19 +116,15 @@ public:
   void stepForward(const MachineInstr &MI,
         SmallVectorImpl<std::pair<unsigned, const MachineOperand*>> &Clobbers);
 
-  /// \brief Adds all live-in registers of basic block @p MBB.
-  void addLiveIns(const MachineBasicBlock *MBB) {
-    for (MachineBasicBlock::livein_iterator LI = MBB->livein_begin(),
-         LE = MBB->livein_end(); LI != LE; ++LI)
-      addReg(*LI);
-  }
-
-  /// \brief Adds all live-out registers of basic block @p MBB.
-  void addLiveOuts(const MachineBasicBlock *MBB) {
-    for (MachineBasicBlock::const_succ_iterator SI = MBB->succ_begin(),
-         SE = MBB->succ_end(); SI != SE; ++SI)
-      addLiveIns(*SI);
-  }
+  /// \brief Adds all live-in registers of basic block @p MBB; After prologue/
+  /// epilogue insertion \p AddPristines should be set to true to insert the
+  /// pristine registers.
+  void addLiveIns(const MachineBasicBlock *MBB, bool AddPristines = false);
+
+  /// \brief Adds all live-out registers of basic block @p MBB; After prologue/
+  /// epilogue insertion \p AddPristines should be set to true to insert the
+  /// pristine registers.
+  void addLiveOuts(const MachineBasicBlock *MBB, bool AddPristines = false);
 
   typedef SparseSet<unsigned>::const_iterator const_iterator;
   const_iterator begin() const { return LiveRegs.begin(); }
diff --git a/include/llvm/CodeGen/LiveRangeEdit.h b/include/llvm/CodeGen/LiveRangeEdit.h
index f04efc3d9f78..c97c636abbb4 100644
--- a/include/llvm/CodeGen/LiveRangeEdit.h
+++ b/include/llvm/CodeGen/LiveRangeEdit.h
@@ -228,6 +228,6 @@ public:
                                 const MachineBlockFrequencyInfo&);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/LiveStackAnalysis.h b/include/llvm/CodeGen/LiveStackAnalysis.h
index b4808ab1f1d4..f495507c66ec 100644
--- a/include/llvm/CodeGen/LiveStackAnalysis.h
+++ b/include/llvm/CodeGen/LiveStackAnalysis.h
@@ -95,6 +95,6 @@ namespace llvm {
     /// print - Implement the dump method.
     void print(raw_ostream &O, const Module* = nullptr) const override;
   };
-} // namespace llvm
+}
 
 #endif /* LLVM_CODEGEN_LIVESTACK_ANALYSIS_H */
diff --git a/include/llvm/CodeGen/LiveVariables.h b/include/llvm/CodeGen/LiveVariables.h
index 334e8c5eab6c..55b97dc3e71d 100644
--- a/include/llvm/CodeGen/LiveVariables.h
+++ b/include/llvm/CodeGen/LiveVariables.h
@@ -306,6 +306,6 @@ public:
   void setPHIJoin(unsigned Reg) { PHIJoins.set(Reg); }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MIRYamlMapping.h b/include/llvm/CodeGen/MIRYamlMapping.h
index b1fe47a17a2d..a6ffeb382978 100644
--- a/include/llvm/CodeGen/MIRYamlMapping.h
+++ b/include/llvm/CodeGen/MIRYamlMapping.h
@@ -25,22 +25,84 @@
 namespace llvm {
 namespace yaml {
 
+/// A wrapper around std::string which contains a source range that's being
+/// set during parsing.
+struct StringValue {
+  std::string Value;
+  SMRange SourceRange;
+
+  StringValue() {}
+  StringValue(std::string Value) : Value(std::move(Value)) {}
+
+  bool operator==(const StringValue &Other) const {
+    return Value == Other.Value;
+  }
+};
+
+template <> struct ScalarTraits<StringValue> {
+  static void output(const StringValue &S, void *, llvm::raw_ostream &OS) {
+    OS << S.Value;
+  }
+
+  static StringRef input(StringRef Scalar, void *Ctx, StringValue &S) {
+    S.Value = Scalar.str();
+    if (const auto *Node =
+            reinterpret_cast<yaml::Input *>(Ctx)->getCurrentNode())
+      S.SourceRange = Node->getSourceRange();
+    return "";
+  }
+
+  static bool mustQuote(StringRef Scalar) { return needsQuotes(Scalar); }
+};
+
+struct FlowStringValue : StringValue {
+  FlowStringValue() {}
+  FlowStringValue(std::string Value) : StringValue(Value) {}
+};
+
+template <> struct ScalarTraits<FlowStringValue> {
+  static void output(const FlowStringValue &S, void *, llvm::raw_ostream &OS) {
+    return ScalarTraits<StringValue>::output(S, nullptr, OS);
+  }
+
+  static StringRef input(StringRef Scalar, void *Ctx, FlowStringValue &S) {
+    return ScalarTraits<StringValue>::input(Scalar, Ctx, S);
+  }
+
+  static bool mustQuote(StringRef Scalar) { return needsQuotes(Scalar); }
+};
+
+} // end namespace yaml
+} // end namespace llvm
+
+LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::yaml::StringValue)
+LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(llvm::yaml::FlowStringValue)
+
+namespace llvm {
+namespace yaml {
+
 struct MachineBasicBlock {
+  unsigned ID;
   std::string Name;
   unsigned Alignment = 0;
   bool IsLandingPad = false;
   bool AddressTaken = false;
-  // TODO: Serialize the successors and liveins.
-  // TODO: Serialize machine instructions.
+  // TODO: Serialize the successor weights and liveins.
+  std::vector<FlowStringValue> Successors;
+
+  std::vector<StringValue> Instructions;
 };
 
 template <> struct MappingTraits<MachineBasicBlock> {
   static void mapping(IO &YamlIO, MachineBasicBlock &MBB) {
+    YamlIO.mapRequired("id", MBB.ID);
     YamlIO.mapOptional("name", MBB.Name,
                        std::string()); // Don't print out an empty name.
     YamlIO.mapOptional("alignment", MBB.Alignment);
     YamlIO.mapOptional("isLandingPad", MBB.IsLandingPad);
     YamlIO.mapOptional("addressTaken", MBB.AddressTaken);
+    YamlIO.mapOptional("successors", MBB.Successors);
+    YamlIO.mapOptional("instructions", MBB.Instructions);
   }
 };
 
@@ -57,6 +119,13 @@ struct MachineFunction {
   unsigned Alignment = 0;
   bool ExposesReturnsTwice = false;
   bool HasInlineAsm = false;
+  // Register information
+  bool IsSSA = false;
+  bool TracksRegLiveness = false;
+  bool TracksSubRegLiveness = false;
+  // TODO: Serialize virtual register definitions.
+  // TODO: Serialize the various register masks.
+  // TODO: Serialize live in registers.
 
   std::vector<MachineBasicBlock> BasicBlocks;
 };
@@ -67,6 +136,9 @@ template <> struct MappingTraits<MachineFunction> {
     YamlIO.mapOptional("alignment", MF.Alignment);
     YamlIO.mapOptional("exposesReturnsTwice", MF.ExposesReturnsTwice);
     YamlIO.mapOptional("hasInlineAsm", MF.HasInlineAsm);
+    YamlIO.mapOptional("isSSA", MF.IsSSA);
+    YamlIO.mapOptional("tracksRegLiveness", MF.TracksRegLiveness);
+    YamlIO.mapOptional("tracksSubRegLiveness", MF.TracksSubRegLiveness);
     YamlIO.mapOptional("body", MF.BasicBlocks);
   }
 };
diff --git a/include/llvm/CodeGen/MachineBasicBlock.h b/include/llvm/CodeGen/MachineBasicBlock.h
index 619894c077ce..5e5f45cae8fb 100644
--- a/include/llvm/CodeGen/MachineBasicBlock.h
+++ b/include/llvm/CodeGen/MachineBasicBlock.h
@@ -461,16 +461,27 @@ public:
   /// instruction of this basic block. If a terminator does not exist,
   /// it returns end()
   iterator getFirstTerminator();
-  const_iterator getFirstTerminator() const;
+  const_iterator getFirstTerminator() const {
+    return const_cast<MachineBasicBlock *>(this)->getFirstTerminator();
+  }
 
   /// getFirstInstrTerminator - Same getFirstTerminator but it ignores bundles
   /// and return an instr_iterator instead.
   instr_iterator getFirstInstrTerminator();
 
+  /// getFirstNonDebugInstr - returns an iterator to the first non-debug
+  /// instruction in the basic block, or end()
+  iterator getFirstNonDebugInstr();
+  const_iterator getFirstNonDebugInstr() const {
+    return const_cast<MachineBasicBlock *>(this)->getFirstNonDebugInstr();
+  }
+
   /// getLastNonDebugInstr - returns an iterator to the last non-debug
   /// instruction in the basic block, or end()
   iterator getLastNonDebugInstr();
-  const_iterator getLastNonDebugInstr() const;
+  const_iterator getLastNonDebugInstr() const {
+    return const_cast<MachineBasicBlock *>(this)->getLastNonDebugInstr();
+  }
 
   /// SplitCriticalEdge - Split the critical edge from this block to the
   /// given successor block, and return the newly created block, or null
@@ -649,6 +660,8 @@ public:
   // Debugging methods.
   void dump() const;
   void print(raw_ostream &OS, SlotIndexes* = nullptr) const;
+  void print(raw_ostream &OS, ModuleSlotTracker &MST,
+             SlotIndexes * = nullptr) const;
 
   // Printing method used by LoopInfo.
   void printAsOperand(raw_ostream &OS, bool PrintType = true) const;
@@ -801,6 +814,6 @@ public:
   MachineBasicBlock::iterator getInitial() { return I; }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineBlockFrequencyInfo.h b/include/llvm/CodeGen/MachineBlockFrequencyInfo.h
index 9d0a069a0b22..feb394e7a69e 100644
--- a/include/llvm/CodeGen/MachineBlockFrequencyInfo.h
+++ b/include/llvm/CodeGen/MachineBlockFrequencyInfo.h
@@ -66,6 +66,6 @@ public:
 
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/MachineBranchProbabilityInfo.h b/include/llvm/CodeGen/MachineBranchProbabilityInfo.h
index da6ea1dbfe40..7ba749559c0f 100644
--- a/include/llvm/CodeGen/MachineBranchProbabilityInfo.h
+++ b/include/llvm/CodeGen/MachineBranchProbabilityInfo.h
@@ -84,7 +84,7 @@ public:
                                     const MachineBasicBlock *Dst) const;
 };
 
-} // namespace llvm
+}
 
 
 #endif
diff --git a/include/llvm/CodeGen/MachineConstantPool.h b/include/llvm/CodeGen/MachineConstantPool.h
index 8a915fb428c3..c619afb83333 100644
--- a/include/llvm/CodeGen/MachineConstantPool.h
+++ b/include/llvm/CodeGen/MachineConstantPool.h
@@ -174,6 +174,6 @@ public:
   void dump() const;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineDominanceFrontier.h b/include/llvm/CodeGen/MachineDominanceFrontier.h
index f8dd2cd34a82..4131194a0c0f 100644
--- a/include/llvm/CodeGen/MachineDominanceFrontier.h
+++ b/include/llvm/CodeGen/MachineDominanceFrontier.h
@@ -104,6 +104,6 @@ public:
   void getAnalysisUsage(AnalysisUsage &AU) const override;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/MachineDominators.h b/include/llvm/CodeGen/MachineDominators.h
index 6518114f1952..4428fa618fb0 100644
--- a/include/llvm/CodeGen/MachineDominators.h
+++ b/include/llvm/CodeGen/MachineDominators.h
@@ -270,6 +270,6 @@ template <> struct GraphTraits<MachineDominatorTree*>
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/MachineFrameInfo.h b/include/llvm/CodeGen/MachineFrameInfo.h
index ac92a4b07915..0f5a4b1b09ec 100644
--- a/include/llvm/CodeGen/MachineFrameInfo.h
+++ b/include/llvm/CodeGen/MachineFrameInfo.h
@@ -600,6 +600,6 @@ public:
   void dump(const MachineFunction &MF) const;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h
index d838cad82b0d..94610cabf566 100644
--- a/include/llvm/CodeGen/MachineFunction.h
+++ b/include/llvm/CodeGen/MachineFunction.h
@@ -546,6 +546,6 @@ template <> struct GraphTraits<Inverse<const MachineFunction*> > :
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineFunctionAnalysis.h b/include/llvm/CodeGen/MachineFunctionAnalysis.h
index 576e72bcc002..4c0f5e63ea1d 100644
--- a/include/llvm/CodeGen/MachineFunctionAnalysis.h
+++ b/include/llvm/CodeGen/MachineFunctionAnalysis.h
@@ -50,6 +50,6 @@ private:
   void getAnalysisUsage(AnalysisUsage &AU) const override;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineFunctionPass.h b/include/llvm/CodeGen/MachineFunctionPass.h
index 0e09c90a9a5a..50a1f6e96217 100644
--- a/include/llvm/CodeGen/MachineFunctionPass.h
+++ b/include/llvm/CodeGen/MachineFunctionPass.h
@@ -54,6 +54,6 @@ private:
   bool runOnFunction(Function &F) override;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index 0313e93f551d..de7e0a29ea0d 100644
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -1105,6 +1105,8 @@ public:
   // Debugging support
   //
   void print(raw_ostream &OS, bool SkipOpers = false) const;
+  void print(raw_ostream &OS, ModuleSlotTracker &MST,
+             bool SkipOpers = false) const;
   void dump() const;
 
   //===--------------------------------------------------------------------===//
@@ -1235,6 +1237,6 @@ inline raw_ostream& operator<<(raw_ostream &OS, const MachineInstr &MI) {
   return OS;
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineInstrBuilder.h b/include/llvm/CodeGen/MachineInstrBuilder.h
index 0778ff453c38..4f68f38b7bbf 100644
--- a/include/llvm/CodeGen/MachineInstrBuilder.h
+++ b/include/llvm/CodeGen/MachineInstrBuilder.h
@@ -40,7 +40,7 @@ namespace RegState {
     ImplicitDefine = Implicit | Define,
     ImplicitKill   = Implicit | Kill
   };
-} // namespace RegState
+}
 
 class MachineInstrBuilder {
   MachineFunction *MF;
@@ -185,8 +185,9 @@ public:
     return *this;
   }
 
-  const MachineInstrBuilder &addSym(MCSymbol *Sym) const {
-    MI->addOperand(*MF, MachineOperand::CreateMCSymbol(Sym));
+  const MachineInstrBuilder &addSym(MCSymbol *Sym,
+                                    unsigned char TargetFlags = 0) const {
+    MI->addOperand(*MF, MachineOperand::CreateMCSymbol(Sym, TargetFlags));
     return *this;
   }
 
@@ -502,6 +503,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineInstrBundle.h b/include/llvm/CodeGen/MachineInstrBundle.h
index edebfa63b8b9..122022486345 100644
--- a/include/llvm/CodeGen/MachineInstrBundle.h
+++ b/include/llvm/CodeGen/MachineInstrBundle.h
@@ -247,6 +247,6 @@ public:
   const MachineOperand *operator->() const { return &deref(); }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineJumpTableInfo.h b/include/llvm/CodeGen/MachineJumpTableInfo.h
index b59b58522264..adcd1d0de63d 100644
--- a/include/llvm/CodeGen/MachineJumpTableInfo.h
+++ b/include/llvm/CodeGen/MachineJumpTableInfo.h
@@ -125,6 +125,6 @@ public:
   void dump() const;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineLoopInfo.h b/include/llvm/CodeGen/MachineLoopInfo.h
index 8c245ae3080f..438ef2e37255 100644
--- a/include/llvm/CodeGen/MachineLoopInfo.h
+++ b/include/llvm/CodeGen/MachineLoopInfo.h
@@ -186,6 +186,6 @@ template <> struct GraphTraits<MachineLoop*> {
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineMemOperand.h b/include/llvm/CodeGen/MachineMemOperand.h
index 9962ff9dbc01..a73b92f9a252 100644
--- a/include/llvm/CodeGen/MachineMemOperand.h
+++ b/include/llvm/CodeGen/MachineMemOperand.h
@@ -27,6 +27,7 @@ namespace llvm {
 class FoldingSetNodeID;
 class MDNode;
 class raw_ostream;
+class ModuleSlotTracker;
 
 /// MachinePointerInfo - This class contains a discriminated union of
 /// information about pointers in memory operands, relating them back to LLVM IR
@@ -200,6 +201,12 @@ public:
   ///
   void Profile(FoldingSetNodeID &ID) const;
 
+  /// Support for operator<<.
+  /// @{
+  void print(raw_ostream &OS) const;
+  void print(raw_ostream &OS, ModuleSlotTracker &MST) const;
+  /// @}
+
   friend bool operator==(const MachineMemOperand &LHS,
                          const MachineMemOperand &RHS) {
     return LHS.getValue() == RHS.getValue() &&
@@ -219,8 +226,11 @@ public:
   }
 };
 
-raw_ostream &operator<<(raw_ostream &OS, const MachineMemOperand &MRO);
+inline raw_ostream &operator<<(raw_ostream &OS, const MachineMemOperand &MRO) {
+  MRO.print(OS);
+  return OS;
+}
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineModuleInfo.h b/include/llvm/CodeGen/MachineModuleInfo.h
index 5faf8de28ee6..ccaa83a238a6 100644
--- a/include/llvm/CodeGen/MachineModuleInfo.h
+++ b/include/llvm/CodeGen/MachineModuleInfo.h
@@ -284,12 +284,14 @@ public:
   /// getAddrLabelSymbol - Return the symbol to be used for the specified basic
   /// block when its address is taken.  This cannot be its normal LBB label
   /// because the block may be accessed outside its containing function.
-  MCSymbol *getAddrLabelSymbol(const BasicBlock *BB);
+  MCSymbol *getAddrLabelSymbol(const BasicBlock *BB) {
+    return getAddrLabelSymbolToEmit(BB).front();
+  }
 
   /// getAddrLabelSymbolToEmit - Return the symbol to be used for the specified
   /// basic block when its address is taken.  If other blocks were RAUW'd to
   /// this one, we may have to emit them as well, return the whole set.
-  std::vector<MCSymbol*> getAddrLabelSymbolToEmit(const BasicBlock *BB);
+  ArrayRef<MCSymbol *> getAddrLabelSymbolToEmit(const BasicBlock *BB);
 
   /// takeDeletedSymbolsForFunction - If the specified function has had any
   /// references to address-taken blocks generated, but the block got deleted,
@@ -441,6 +443,6 @@ public:
 
 }; // End class MachineModuleInfo
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineOperand.h b/include/llvm/CodeGen/MachineOperand.h
index 8c8ce71253e6..c43e47c36d06 100644
--- a/include/llvm/CodeGen/MachineOperand.h
+++ b/include/llvm/CodeGen/MachineOperand.h
@@ -27,6 +27,7 @@ class MachineBasicBlock;
 class MachineInstr;
 class MachineRegisterInfo;
 class MDNode;
+class ModuleSlotTracker;
 class TargetMachine;
 class TargetRegisterInfo;
 class hash_code;
@@ -218,6 +219,8 @@ public:
   void clearParent() { ParentMI = nullptr; }
 
   void print(raw_ostream &os, const TargetRegisterInfo *TRI = nullptr) const;
+  void print(raw_ostream &os, ModuleSlotTracker &MST,
+             const TargetRegisterInfo *TRI = nullptr) const;
 
   //===--------------------------------------------------------------------===//
   // Accessors that tell you what kind of MachineOperand you're looking at.
@@ -450,11 +453,12 @@ public:
     return Contents.CFIIndex;
   }
 
-  /// getOffset - Return the offset from the symbol in this operand. This always
-  /// returns 0 for ExternalSymbol operands.
+  /// Return the offset from the symbol in this operand. This always returns 0
+  /// for ExternalSymbol operands.
   int64_t getOffset() const {
-    assert((isGlobal() || isSymbol() || isCPI() || isTargetIndex() ||
-            isBlockAddress()) && "Wrong MachineOperand accessor");
+    assert((isGlobal() || isSymbol() || isMCSymbol() || isCPI() ||
+            isTargetIndex() || isBlockAddress()) &&
+           "Wrong MachineOperand accessor");
     return int64_t(uint64_t(Contents.OffsetedInfo.OffsetHi) << 32) |
            SmallContents.OffsetLo;
   }
@@ -512,8 +516,9 @@ public:
   }
 
   void setOffset(int64_t Offset) {
-    assert((isGlobal() || isSymbol() || isCPI() || isTargetIndex() ||
-            isBlockAddress()) && "Wrong MachineOperand accessor");
+    assert((isGlobal() || isSymbol() || isMCSymbol() || isCPI() ||
+            isTargetIndex() || isBlockAddress()) &&
+           "Wrong MachineOperand accessor");
     SmallContents.OffsetLo = unsigned(Offset);
     Contents.OffsetedInfo.OffsetHi = int(Offset >> 32);
   }
@@ -703,9 +708,12 @@ public:
     return Op;
   }
 
-  static MachineOperand CreateMCSymbol(MCSymbol *Sym) {
+  static MachineOperand CreateMCSymbol(MCSymbol *Sym,
+                                       unsigned char TargetFlags = 0) {
     MachineOperand Op(MachineOperand::MO_MCSymbol);
     Op.Contents.Sym = Sym;
+    Op.setOffset(0);
+    Op.setTargetFlags(TargetFlags);
     return Op;
   }
 
@@ -741,6 +749,6 @@ inline raw_ostream &operator<<(raw_ostream &OS, const MachineOperand& MO) {
   // See friend declaration above. This additional declaration is required in
   // order to compile LLVM with IBM xlC compiler.
   hash_code hash_value(const MachineOperand &MO);
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineRegionInfo.h b/include/llvm/CodeGen/MachineRegionInfo.h
index 794f1d6a4d60..cf49c297c288 100644
--- a/include/llvm/CodeGen/MachineRegionInfo.h
+++ b/include/llvm/CodeGen/MachineRegionInfo.h
@@ -176,6 +176,6 @@ EXTERN_TEMPLATE_INSTANTIATION(class RegionBase<RegionTraits<MachineFunction>>);
 EXTERN_TEMPLATE_INSTANTIATION(class RegionNodeBase<RegionTraits<MachineFunction>>);
 EXTERN_TEMPLATE_INSTANTIATION(class RegionInfoBase<RegionTraits<MachineFunction>>);
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/MachineRegisterInfo.h b/include/llvm/CodeGen/MachineRegisterInfo.h
index c17ad38a177b..e5b837aeea28 100644
--- a/include/llvm/CodeGen/MachineRegisterInfo.h
+++ b/include/llvm/CodeGen/MachineRegisterInfo.h
@@ -1036,6 +1036,6 @@ getPressureSets(unsigned RegUnit) const {
   return PSetIterator(RegUnit, this);
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineSSAUpdater.h b/include/llvm/CodeGen/MachineSSAUpdater.h
index dad0c4620805..5f988ad86320 100644
--- a/include/llvm/CodeGen/MachineSSAUpdater.h
+++ b/include/llvm/CodeGen/MachineSSAUpdater.h
@@ -111,6 +111,6 @@ private:
   MachineSSAUpdater(const MachineSSAUpdater&) = delete;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/MachineValueType.h b/include/llvm/CodeGen/MachineValueType.h
index a3eea5b34072..a728df354677 100644
--- a/include/llvm/CodeGen/MachineValueType.h
+++ b/include/llvm/CodeGen/MachineValueType.h
@@ -644,6 +644,6 @@ class MVT {
     /// @}
   };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/PBQPRAConstraint.h b/include/llvm/CodeGen/PBQPRAConstraint.h
index 832c043e2f5b..833b9bad613f 100644
--- a/include/llvm/CodeGen/PBQPRAConstraint.h
+++ b/include/llvm/CodeGen/PBQPRAConstraint.h
@@ -64,6 +64,6 @@ private:
   void anchor() override;
 };
 
-} // namespace llvm
+}
 
 #endif /* LLVM_CODEGEN_PBQPRACONSTRAINT_H */
diff --git a/include/llvm/CodeGen/Passes.h b/include/llvm/CodeGen/Passes.h
index 3aeec2ac9cab..538c995a7b44 100644
--- a/include/llvm/CodeGen/Passes.h
+++ b/include/llvm/CodeGen/Passes.h
@@ -637,7 +637,12 @@ namespace llvm {
   /// createForwardControlFlowIntegrityPass - This pass adds control-flow
   /// integrity.
   ModulePass *createForwardControlFlowIntegrityPass();
-} // namespace llvm
+
+  /// InterleavedAccess Pass - This pass identifies and matches interleaved
+  /// memory accesses to target specific intrinsics.
+  ///
+  FunctionPass *createInterleavedAccessPass(const TargetMachine *TM);
+} // End llvm namespace
 
 /// Target machine pass initializer for passes with dependencies. Use with
 /// INITIALIZE_TM_PASS_END.
diff --git a/include/llvm/CodeGen/PseudoSourceValue.h b/include/llvm/CodeGen/PseudoSourceValue.h
index e0ec72f1afa2..a518b6233250 100644
--- a/include/llvm/CodeGen/PseudoSourceValue.h
+++ b/include/llvm/CodeGen/PseudoSourceValue.h
@@ -29,8 +29,7 @@ namespace llvm {
   /// space), or constant pool.
   class PseudoSourceValue {
   private:
-    friend raw_ostream &llvm::operator<<(raw_ostream &OS,
-                                         const MachineMemOperand &MMO);
+    friend class MachineMemOperand; // For printCustom().
 
     /// printCustom - Implement printing for PseudoSourceValue. This is called
     /// from Value::print or Value's operator<<.
@@ -106,6 +105,6 @@ namespace llvm {
 
     int getFrameIndex() const { return FI; }
   };
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/RegisterScavenging.h b/include/llvm/CodeGen/RegisterScavenging.h
index b2e31fa9a1a1..df3fd34e0af6 100644
--- a/include/llvm/CodeGen/RegisterScavenging.h
+++ b/include/llvm/CodeGen/RegisterScavenging.h
@@ -184,6 +184,6 @@ private:
 
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/ResourcePriorityQueue.h b/include/llvm/CodeGen/ResourcePriorityQueue.h
index d1ea9ffff9e6..0097e0472e5c 100644
--- a/include/llvm/CodeGen/ResourcePriorityQueue.h
+++ b/include/llvm/CodeGen/ResourcePriorityQueue.h
@@ -131,6 +131,6 @@ private:
     unsigned numberRCValPredInSU (SUnit *SU, unsigned RCId);
     unsigned numberRCValSuccInSU (SUnit *SU, unsigned RCId);
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/RuntimeLibcalls.h b/include/llvm/CodeGen/RuntimeLibcalls.h
index 34adde592950..2be5de640e29 100644
--- a/include/llvm/CodeGen/RuntimeLibcalls.h
+++ b/include/llvm/CodeGen/RuntimeLibcalls.h
@@ -429,7 +429,7 @@ namespace RTLIB {
   /// Return the SYNC_FETCH_AND_* value for the given opcode and type, or
   /// UNKNOWN_LIBCALL if there is none.
   Libcall getATOMIC(unsigned Opc, MVT VT);
-} // namespace RTLIB
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/CodeGen/ScheduleDAG.h b/include/llvm/CodeGen/ScheduleDAG.h
index 9b5d59c28105..839131416560 100644
--- a/include/llvm/CodeGen/ScheduleDAG.h
+++ b/include/llvm/CodeGen/ScheduleDAG.h
@@ -748,6 +748,6 @@ namespace llvm {
     reverse_iterator rend() { return Index2Node.rend(); }
     const_reverse_iterator rend() const { return Index2Node.rend(); }
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/ScheduleHazardRecognizer.h b/include/llvm/CodeGen/ScheduleHazardRecognizer.h
index ef872a2b9100..8a40e7212ff6 100644
--- a/include/llvm/CodeGen/ScheduleHazardRecognizer.h
+++ b/include/llvm/CodeGen/ScheduleHazardRecognizer.h
@@ -106,6 +106,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/ScoreboardHazardRecognizer.h b/include/llvm/CodeGen/ScoreboardHazardRecognizer.h
index 5911cfbefc81..ab14c2de32b0 100644
--- a/include/llvm/CodeGen/ScoreboardHazardRecognizer.h
+++ b/include/llvm/CodeGen/ScoreboardHazardRecognizer.h
@@ -121,6 +121,6 @@ public:
   void RecedeCycle() override;
 };
 
-} // namespace llvm
+}
 
 #endif //!LLVM_CODEGEN_SCOREBOARDHAZARDRECOGNIZER_H
diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index aa50dea25765..c2b1243ee26e 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -495,6 +495,8 @@ public:
   SDValue getExternalSymbol(const char *Sym, SDLoc dl, EVT VT);
   SDValue getTargetExternalSymbol(const char *Sym, EVT VT,
                                   unsigned char TargetFlags = 0);
+  SDValue getMCSymbol(MCSymbol *Sym, EVT VT);
+
   SDValue getValueType(EVT);
   SDValue getRegister(unsigned Reg, EVT VT);
   SDValue getRegisterMask(const uint32_t *RegMask);
@@ -1278,6 +1280,7 @@ private:
   StringMap<SDNode*> ExternalSymbols;
 
   std::map<std::pair<std::string, unsigned char>,SDNode*> TargetExternalSymbols;
+  DenseMap<MCSymbol *, SDNode *> MCSymbols;
 };
 
 template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> {
diff --git a/include/llvm/CodeGen/SelectionDAGISel.h b/include/llvm/CodeGen/SelectionDAGISel.h
index dc4fa2b68488..a011e4c338c4 100644
--- a/include/llvm/CodeGen/SelectionDAGISel.h
+++ b/include/llvm/CodeGen/SelectionDAGISel.h
@@ -301,6 +301,6 @@ private:
 
 };
 
-} // namespace llvm
+}
 
 #endif /* LLVM_CODEGEN_SELECTIONDAGISEL_H */
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 4b65eaa4f209..619119096d20 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -89,7 +89,7 @@ namespace ISD {
   /// Return true if the node has at least one operand
   /// and all operands of the specified node are ISD::UNDEF.
   bool allOperandsUndef(const SDNode *N);
-} // namespace ISD
+}  // end llvm:ISD namespace
 
 //===----------------------------------------------------------------------===//
 /// Unlike LLVM values, Selection DAG nodes may return multiple
@@ -579,6 +579,23 @@ public:
   op_iterator op_end() const { return OperandList+NumOperands; }
   ArrayRef<SDUse> ops() const { return makeArrayRef(op_begin(), op_end()); }
 
+  /// Iterator for directly iterating over the operand SDValue's.
+  struct value_op_iterator
+      : iterator_adaptor_base<value_op_iterator, op_iterator,
+                              std::random_access_iterator_tag, SDValue,
+                              ptrdiff_t, value_op_iterator *,
+                              value_op_iterator *> {
+    explicit value_op_iterator(SDUse *U = nullptr)
+      : iterator_adaptor_base(U) {}
+
+    const SDValue &operator*() const { return I->get(); }
+  };
+
+  iterator_range<value_op_iterator> op_values() const {
+    return iterator_range<value_op_iterator>(value_op_iterator(op_begin()),
+                                             value_op_iterator(op_end()));
+  }
+
   SDVTList getVTList() const {
     SDVTList X = { ValueList, NumValues };
     return X;
@@ -1810,6 +1827,21 @@ public:
   }
 };
 
+class MCSymbolSDNode : public SDNode {
+  MCSymbol *Symbol;
+
+  friend class SelectionDAG;
+  MCSymbolSDNode(MCSymbol *Symbol, EVT VT)
+      : SDNode(ISD::MCSymbol, 0, DebugLoc(), getSDVTList(VT)), Symbol(Symbol) {}
+
+public:
+  MCSymbol *getMCSymbol() const { return Symbol; }
+
+  static bool classof(const SDNode *N) {
+    return N->getOpcode() == ISD::MCSymbol;
+  }
+};
+
 class CondCodeSDNode : public SDNode {
   ISD::CondCode Condition;
   friend class SelectionDAG;
@@ -2268,8 +2300,8 @@ namespace ISD {
     return isa<StoreSDNode>(N) &&
       cast<StoreSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
   }
-} // namespace ISD
+}
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/SlotIndexes.h b/include/llvm/CodeGen/SlotIndexes.h
index 5f213979b61b..9d6d6f5b1be0 100644
--- a/include/llvm/CodeGen/SlotIndexes.h
+++ b/include/llvm/CodeGen/SlotIndexes.h
@@ -705,6 +705,6 @@ namespace llvm {
   struct IntervalMapInfo<SlotIndex> : IntervalMapHalfOpenInfo<SlotIndex> {
   };
 
-} // namespace llvm
+}
 
 #endif // LLVM_CODEGEN_SLOTINDEXES_H
diff --git a/include/llvm/CodeGen/StackMaps.h b/include/llvm/CodeGen/StackMaps.h
index ba2740452069..46a773f74aac 100644
--- a/include/llvm/CodeGen/StackMaps.h
+++ b/include/llvm/CodeGen/StackMaps.h
@@ -255,6 +255,6 @@ private:
   void debug() { print(dbgs()); }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h b/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
index 9a1b63f91bd4..10c099d2c2f5 100644
--- a/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
+++ b/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
@@ -90,10 +90,6 @@ public:
   ~TargetLoweringObjectFileMachO() override {}
   TargetLoweringObjectFileMachO();
 
-  /// Extract the dependent library name from a linker option string. Returns
-  /// StringRef() if the option does not specify a library.
-  StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const override;
-
   /// Emit the module flags that specify the garbage collection information.
   void emitModuleFlags(MCStreamer &Streamer,
                        ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
@@ -150,10 +146,6 @@ public:
   MCSection *getSectionForJumpTable(const Function &F, Mangler &Mang,
                                     const TargetMachine &TM) const override;
 
-  /// Extract the dependent library name from a linker option string. Returns
-  /// StringRef() if the option does not specify a library.
-  StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const override;
-
   /// Emit Obj-C garbage collection and linker options. Only linker option
   /// emission is implemented for COFF.
   void emitModuleFlags(MCStreamer &Streamer,
@@ -164,6 +156,9 @@ public:
                                   const MCSymbol *KeySym) const override;
   MCSection *getStaticDtorSection(unsigned Priority,
                                   const MCSymbol *KeySym) const override;
+
+  void emitLinkerFlagsForGlobal(raw_ostream &OS, const GlobalValue *GV,
+                                const Mangler &Mang) const override;
 };
 
 } // end namespace llvm
diff --git a/include/llvm/CodeGen/ValueTypes.h b/include/llvm/CodeGen/ValueTypes.h
index e02d7db3f50e..e1a9fd38290b 100644
--- a/include/llvm/CodeGen/ValueTypes.h
+++ b/include/llvm/CodeGen/ValueTypes.h
@@ -361,6 +361,6 @@ namespace llvm {
     unsigned getExtendedSizeInBits() const;
   };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/VirtRegMap.h b/include/llvm/CodeGen/VirtRegMap.h
index 5b771d068fb8..d7e92094877d 100644
--- a/include/llvm/CodeGen/VirtRegMap.h
+++ b/include/llvm/CodeGen/VirtRegMap.h
@@ -185,6 +185,6 @@ namespace llvm {
     VRM.print(OS);
     return OS;
   }
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/CodeGen/WinEHFuncInfo.h b/include/llvm/CodeGen/WinEHFuncInfo.h
index 5c1b3dfa48aa..291f3905512c 100644
--- a/include/llvm/CodeGen/WinEHFuncInfo.h
+++ b/include/llvm/CodeGen/WinEHFuncInfo.h
@@ -161,5 +161,5 @@ struct WinEHFuncInfo {
 void calculateWinCXXEHStateNumbers(const Function *ParentFn,
                                    WinEHFuncInfo &FuncInfo);
 
-} // namespace llvm
+}
 #endif // LLVM_CODEGEN_WINEHFUNCINFO_H
diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index 1712e5860895..b9fd4504ad76 100644
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -125,9 +125,6 @@
 /* Define if you have the libdl library or equivalent. */
 #cmakedefine HAVE_LIBDL ${HAVE_LIBDL}
 
-/* Define to 1 if you have the `imagehlp' library (-limagehlp). */
-#cmakedefine HAVE_LIBIMAGEHLP ${HAVE_LIBIMAGEHLP}
-
 /* Define to 1 if you have the `m' library (-lm). */
 #undef HAVE_LIBM
 
diff --git a/include/llvm/Config/config.h.in b/include/llvm/Config/config.h.in
index 49d1b1f8a6f1..09706499ea30 100644
--- a/include/llvm/Config/config.h.in
+++ b/include/llvm/Config/config.h.in
@@ -137,9 +137,6 @@
 /* Define if libedit is available on this platform. */
 #undef HAVE_LIBEDIT
 
-/* Define to 1 if you have the `imagehlp' library (-limagehlp). */
-#undef HAVE_LIBIMAGEHLP
-
 /* Define to 1 if you have the `m' library (-lm). */
 #undef HAVE_LIBM
 
diff --git a/include/llvm/DebugInfo/DIContext.h b/include/llvm/DebugInfo/DIContext.h
index 8e5794dd746e..871e60c56b13 100644
--- a/include/llvm/DebugInfo/DIContext.h
+++ b/include/llvm/DebugInfo/DIContext.h
@@ -172,6 +172,6 @@ public:
   virtual std::unique_ptr<LoadedObjectInfo> clone() const = 0;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h b/include/llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h
index 72f304a740a4..6ab5d5ce6f6e 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h
@@ -57,6 +57,6 @@ private:
   AttributeSpecVector AttributeSpecs;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h b/include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h
index f89143854e68..47dbf5fd4f56 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h
@@ -49,6 +49,6 @@ public:
   void dump(raw_ostream &OS) const;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFCompileUnit.h b/include/llvm/DebugInfo/DWARF/DWARFCompileUnit.h
index 9f7527fc66ea..743f9c696e9e 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFCompileUnit.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFCompileUnit.h
@@ -26,6 +26,6 @@ public:
   ~DWARFCompileUnit() override;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFContext.h b/include/llvm/DebugInfo/DWARF/DWARFContext.h
index 0e29ad6102e6..423c0d32f1b5 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFContext.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFContext.h
@@ -295,6 +295,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h b/include/llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h
index 88519ce62875..21142089da6b 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h
@@ -58,6 +58,6 @@ private:
   void clear();
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFDebugArangeSet.h b/include/llvm/DebugInfo/DWARF/DWARFDebugArangeSet.h
index 15850b2a6f2c..837a8e63469e 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFDebugArangeSet.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFDebugArangeSet.h
@@ -65,6 +65,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFDebugAranges.h b/include/llvm/DebugInfo/DWARF/DWARFDebugAranges.h
index 58359fa9efbf..791f010a8892 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFDebugAranges.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFDebugAranges.h
@@ -82,6 +82,6 @@ private:
   DenseSet<uint32_t> ParsedCUOffsets;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h b/include/llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h
index 3cbae4119781..f29d5fe9ecde 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h
@@ -155,6 +155,6 @@ struct DWARFDebugInfoEntryInlinedChain {
   const DWARFUnit *U;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFDebugLine.h b/include/llvm/DebugInfo/DWARF/DWARFDebugLine.h
index e728d59ebb84..93e7c790ccf9 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFDebugLine.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFDebugLine.h
@@ -248,6 +248,6 @@ private:
   LineTableMapTy LineTableMap;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h b/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h
index 6a3f2adeb8f7..bd44c2e5aab9 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h
@@ -76,6 +76,6 @@ public:
   void parse(DataExtractor data);
   void dump(raw_ostream &OS) const;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFFormValue.h b/include/llvm/DebugInfo/DWARF/DWARFFormValue.h
index 2d6bb0e00537..7ddcc0d81d59 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFFormValue.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFFormValue.h
@@ -91,6 +91,6 @@ private:
   void dumpString(raw_ostream &OS, const DWARFUnit *U) const;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/DWARF/DWARFTypeUnit.h b/include/llvm/DebugInfo/DWARF/DWARFTypeUnit.h
index de853c35cd89..f24e27819da2 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFTypeUnit.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFTypeUnit.h
@@ -32,7 +32,7 @@ protected:
   bool extractImpl(DataExtractor debug_info, uint32_t *offset_ptr) override;
 };
 
-} // namespace llvm
+}
 
 #endif
 
diff --git a/include/llvm/DebugInfo/DWARF/DWARFUnit.h b/include/llvm/DebugInfo/DWARF/DWARFUnit.h
index 54209cff57b5..5604b93f2205 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFUnit.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFUnit.h
@@ -279,6 +279,6 @@ private:
   const DWARFDebugInfoEntryMinimal *getSubprogramForAddress(uint64_t Address);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h b/include/llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h
index 8a06d55392d9..b5fa8c33414d 100644
--- a/include/llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h
+++ b/include/llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h
@@ -54,6 +54,6 @@ private:
 
   std::unique_ptr<IPDBEnumSymbols> Enumerator;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/IPDBDataStream.h b/include/llvm/DebugInfo/PDB/IPDBDataStream.h
index 429cd7e7ef74..808a0f3ec3a9 100644
--- a/include/llvm/DebugInfo/PDB/IPDBDataStream.h
+++ b/include/llvm/DebugInfo/PDB/IPDBDataStream.h
@@ -32,6 +32,6 @@ public:
   virtual void reset() = 0;
   virtual IPDBDataStream *clone() const = 0;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/IPDBEnumChildren.h b/include/llvm/DebugInfo/PDB/IPDBEnumChildren.h
index 5001a95c25de..645ac96e23a5 100644
--- a/include/llvm/DebugInfo/PDB/IPDBEnumChildren.h
+++ b/include/llvm/DebugInfo/PDB/IPDBEnumChildren.h
@@ -28,6 +28,6 @@ public:
   virtual void reset() = 0;
   virtual MyType *clone() const = 0;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/IPDBLineNumber.h b/include/llvm/DebugInfo/PDB/IPDBLineNumber.h
index 30036df42c91..92cd58d86649 100644
--- a/include/llvm/DebugInfo/PDB/IPDBLineNumber.h
+++ b/include/llvm/DebugInfo/PDB/IPDBLineNumber.h
@@ -31,6 +31,6 @@ public:
   virtual uint32_t getCompilandId() const = 0;
   virtual bool isStatement() const = 0;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/IPDBSession.h b/include/llvm/DebugInfo/PDB/IPDBSession.h
index 1dca9117134d..a130a38a6538 100644
--- a/include/llvm/DebugInfo/PDB/IPDBSession.h
+++ b/include/llvm/DebugInfo/PDB/IPDBSession.h
@@ -56,6 +56,6 @@ public:
 
   virtual std::unique_ptr<IPDBEnumDataStreams> getDebugStreams() const = 0;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/IPDBSourceFile.h b/include/llvm/DebugInfo/PDB/IPDBSourceFile.h
index 8081ea5d7712..55000eff02f0 100644
--- a/include/llvm/DebugInfo/PDB/IPDBSourceFile.h
+++ b/include/llvm/DebugInfo/PDB/IPDBSourceFile.h
@@ -32,6 +32,6 @@ public:
   virtual PDB_Checksum getChecksumType() const = 0;
   virtual std::unique_ptr<IPDBEnumSymbols> getCompilands() const = 0;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/PDBContext.h b/include/llvm/DebugInfo/PDB/PDBContext.h
index 3b4a77ec721f..2bb97463f90d 100644
--- a/include/llvm/DebugInfo/PDB/PDBContext.h
+++ b/include/llvm/DebugInfo/PDB/PDBContext.h
@@ -55,6 +55,6 @@ private:
   std::string getFunctionName(uint64_t Address, DINameKind NameKind) const;
   std::unique_ptr<IPDBSession> Session;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/PDBExtras.h b/include/llvm/DebugInfo/PDB/PDBExtras.h
index 64f9694147df..48ce1c127196 100644
--- a/include/llvm/DebugInfo/PDB/PDBExtras.h
+++ b/include/llvm/DebugInfo/PDB/PDBExtras.h
@@ -33,6 +33,6 @@ raw_ostream &operator<<(raw_ostream &OS, const PDB_UniqueId &Id);
 raw_ostream &operator<<(raw_ostream &OS, const Variant &Value);
 raw_ostream &operator<<(raw_ostream &OS, const VersionInfo &Version);
 raw_ostream &operator<<(raw_ostream &OS, const TagStats &Stats);
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/PDBSymDumper.h b/include/llvm/DebugInfo/PDB/PDBSymDumper.h
index ffd31a55116d..65110f39366f 100644
--- a/include/llvm/DebugInfo/PDB/PDBSymDumper.h
+++ b/include/llvm/DebugInfo/PDB/PDBSymDumper.h
@@ -56,6 +56,6 @@ public:
 private:
   bool RequireImpl;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/DebugInfo/PDB/PDBSymbolAnnotation.h b/include/llvm/DebugInfo/PDB/PDBSymbolAnnotation.h
index bd85e600a17b..c055dd7f3d49 100644
--- a/include/llvm/DebugInfo/PDB/PDBSymbolAnnotation.h
+++ b/include/llvm/DebugInfo/PDB/PDBSymbolAnnotation.h
@@ -34,6 +34,6 @@ public:
   // FORWARD_SYMBOL_METHOD(getValue)
   FORWARD_SYMBOL_METHOD(getVirtualAddress)
 };
-} // namespace llvm
+}
 
 #endif // LLVM_DEBUGINFO_PDB_PDBSYMBOLANNOTATION_H
diff --git a/include/llvm/DebugInfo/PDB/PDBSymbolBlock.h b/include/llvm/DebugInfo/PDB/PDBSymbolBlock.h
index 67821793561d..2ca12501d9f6 100644
--- a/include/llvm/DebugInfo/PDB/PDBSymbolBlock.h
+++ b/include/llvm/DebugInfo/PDB/PDBSymbolBlock.h
@@ -36,6 +36,6 @@ public:
   FORWARD_SYMBOL_METHOD(getSymIndexId)
   FORWARD_SYMBOL_METHOD(getVirtualAddress)
 };
-} // namespace llvm
+}
 
 #endif // LLVM_DEBUGINFO_PDB_PDBSYMBOLBLOCK_H
diff --git a/include/llvm/DebugInfo/PDB/PDBSymbolCompiland.h b/include/llvm/DebugInfo/PDB/PDBSymbolCompiland.h
index d92830fe3fec..f8c796ae5bdc 100644
--- a/include/llvm/DebugInfo/PDB/PDBSymbolCompiland.h
+++ b/include/llvm/DebugInfo/PDB/PDBSymbolCompiland.h
@@ -33,6 +33,6 @@ public:
   FORWARD_SYMBOL_METHOD(getSourceFileName)
   FORWARD_SYMBOL_METHOD(getSymIndexId)
 };
-} // namespace llvm
+}
 
 #endif // LLVM_DEBUGINFO_PDB_PDBSYMBOLCOMPILAND_H
diff --git a/include/llvm/ExecutionEngine/ExecutionEngine.h b/include/llvm/ExecutionEngine/ExecutionEngine.h
index f86490b55bdc..e8af601d83b6 100644
--- a/include/llvm/ExecutionEngine/ExecutionEngine.h
+++ b/include/llvm/ExecutionEngine/ExecutionEngine.h
@@ -634,6 +634,6 @@ public:
 // Create wrappers for C Binding types (see CBindingWrapping.h).
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ExecutionEngine, LLVMExecutionEngineRef)
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/ExecutionEngine/GenericValue.h b/include/llvm/ExecutionEngine/GenericValue.h
index ea5ddfc3274e..0e92f79eba8f 100644
--- a/include/llvm/ExecutionEngine/GenericValue.h
+++ b/include/llvm/ExecutionEngine/GenericValue.h
@@ -49,5 +49,5 @@ struct GenericValue {
 inline GenericValue PTOGV(void *P) { return GenericValue(P); }
 inline void* GVTOP(const GenericValue &GV) { return GV.PointerVal; }
 
-} // namespace llvm
+} // End llvm namespace.
 #endif
diff --git a/include/llvm/ExecutionEngine/MCJIT.h b/include/llvm/ExecutionEngine/MCJIT.h
index 294f11d332c2..66ddb7cdb875 100644
--- a/include/llvm/ExecutionEngine/MCJIT.h
+++ b/include/llvm/ExecutionEngine/MCJIT.h
@@ -33,6 +33,6 @@ namespace {
       LLVMLinkInMCJIT();
     }
   } ForceMCJITLinking;
-} // namespace
+}
 
 #endif
diff --git a/include/llvm/ExecutionEngine/ObjectCache.h b/include/llvm/ExecutionEngine/ObjectCache.h
index 1084de82a49b..cc01a4e58999 100644
--- a/include/llvm/ExecutionEngine/ObjectCache.h
+++ b/include/llvm/ExecutionEngine/ObjectCache.h
@@ -35,6 +35,6 @@ public:
   virtual std::unique_ptr<MemoryBuffer> getObject(const Module* M) = 0;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h b/include/llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h
index 4c515dbfa8e8..9694b80d1928 100644
--- a/include/llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h
+++ b/include/llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h
@@ -241,11 +241,10 @@ private:
   }
 
   static std::string Mangle(StringRef Name, const DataLayout &DL) {
-    Mangler M(&DL);
     std::string MangledName;
     {
       raw_string_ostream MangledNameStream(MangledName);
-      M.getNameWithPrefix(MangledNameStream, Name);
+      Mangler::getNameWithPrefix(MangledNameStream, Name, DL);
     }
     return MangledName;
   }
diff --git a/include/llvm/ExecutionEngine/Orc/LazyEmittingLayer.h b/include/llvm/ExecutionEngine/Orc/LazyEmittingLayer.h
index 71c83f7e05f6..93ba02b38706 100644
--- a/include/llvm/ExecutionEngine/Orc/LazyEmittingLayer.h
+++ b/include/llvm/ExecutionEngine/Orc/LazyEmittingLayer.h
@@ -193,7 +193,7 @@ private:
       auto Symbols = llvm::make_unique<StringMap<const GlobalValue*>>();
 
       for (const auto &M : Ms) {
-        Mangler Mang(&M->getDataLayout());
+        Mangler Mang;
 
         for (const auto &V : M->globals())
           if (auto GV = addGlobalValue(*Symbols, V, Mang, SearchName,
diff --git a/include/llvm/ExecutionEngine/Orc/NullResolver.h b/include/llvm/ExecutionEngine/Orc/NullResolver.h
new file mode 100644
index 000000000000..1560c6d86e0f
--- /dev/null
+++ b/include/llvm/ExecutionEngine/Orc/NullResolver.h
@@ -0,0 +1,36 @@
+//===------ NullResolver.h - Reject symbol lookup requests ------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//   Defines a RuntimeDyld::SymbolResolver subclass that rejects all symbol
+// resolution requests, for clients that have no cross-object fixups.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_ORC_NULLRESOLVER_H
+#define LLVM_EXECUTIONENGINE_ORC_NULLRESOLVER_H
+
+#include "llvm/ExecutionEngine/RuntimeDyld.h"
+
+namespace llvm {
+namespace orc {
+
+/// SymbolResolver impliementation that rejects all resolution requests.
+/// Useful for clients that have no cross-object fixups.
+class NullResolver : public RuntimeDyld::SymbolResolver {
+public:
+  RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) final;
+
+  RuntimeDyld::SymbolInfo
+  findSymbolInLogicalDylib(const std::string &Name) final;
+};
+
+} // End namespace orc.
+} // End namespace llvm.
+
+#endif // LLVM_EXECUTIONENGINE_ORC_NULLRESOLVER_H
diff --git a/include/llvm/ExecutionEngine/Orc/ObjectTransformLayer.h b/include/llvm/ExecutionEngine/Orc/ObjectTransformLayer.h
new file mode 100644
index 000000000000..7af662085474
--- /dev/null
+++ b/include/llvm/ExecutionEngine/Orc/ObjectTransformLayer.h
@@ -0,0 +1,112 @@
+//===- ObjectTransformLayer.h - Run all objects through functor -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Run all objects passed in through a user supplied functor.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
+#define LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
+
+#include "JITSymbol.h"
+
+namespace llvm {
+namespace orc {
+
+/// @brief Object mutating layer.
+///
+///   This layer accepts sets of ObjectFiles (via addObjectSet). It
+/// immediately applies the user supplied functor to each object, then adds
+/// the set of transformed objects to the layer below.
+template <typename BaseLayerT, typename TransformFtor>
+class ObjectTransformLayer {
+public:
+  /// @brief Handle to a set of added objects.
+  typedef typename BaseLayerT::ObjSetHandleT ObjSetHandleT;
+
+  /// @brief Construct an ObjectTransformLayer with the given BaseLayer
+  ObjectTransformLayer(BaseLayerT &BaseLayer,
+                       TransformFtor Transform = TransformFtor())
+      : BaseLayer(BaseLayer), Transform(std::move(Transform)) {}
+
+  /// @brief Apply the transform functor to each object in the object set, then
+  ///        add the resulting set of objects to the base layer, along with the
+  ///        memory manager and symbol resolver.
+  ///
+  /// @return A handle for the added objects.
+  template <typename ObjSetT, typename MemoryManagerPtrT,
+            typename SymbolResolverPtrT>
+  ObjSetHandleT addObjectSet(ObjSetT &Objects, MemoryManagerPtrT MemMgr,
+                             SymbolResolverPtrT Resolver) {
+
+    for (auto I = Objects.begin(), E = Objects.end(); I != E; ++I)
+      *I = Transform(std::move(*I));
+
+    return BaseLayer.addObjectSet(Objects, std::move(MemMgr),
+                                  std::move(Resolver));
+  }
+
+  /// @brief Remove the object set associated with the handle H.
+  void removeObjectSet(ObjSetHandleT H) { BaseLayer.removeObjectSet(H); }
+
+  /// @brief Search for the given named symbol.
+  /// @param Name The name of the symbol to search for.
+  /// @param ExportedSymbolsOnly If true, search only for exported symbols.
+  /// @return A handle for the given named symbol, if it exists.
+  JITSymbol findSymbol(const std::string &Name, bool ExportedSymbolsOnly) {
+    return BaseLayer.findSymbol(Name, ExportedSymbolsOnly);
+  }
+
+  /// @brief Get the address of the given symbol in the context of the set of
+  ///        objects represented by the handle H. This call is forwarded to the
+  ///        base layer's implementation.
+  /// @param H The handle for the object set to search in.
+  /// @param Name The name of the symbol to search for.
+  /// @param ExportedSymbolsOnly If true, search only for exported symbols.
+  /// @return A handle for the given named symbol, if it is found in the
+  ///         given object set.
+  JITSymbol findSymbolIn(ObjSetHandleT H, const std::string &Name,
+                         bool ExportedSymbolsOnly) {
+    return BaseLayer.findSymbolIn(H, Name, ExportedSymbolsOnly);
+  }
+
+  /// @brief Immediately emit and finalize the object set represented by the
+  ///        given handle.
+  /// @param H Handle for object set to emit/finalize.
+  void emitAndFinalize(ObjSetHandleT H) { BaseLayer.emitAndFinalize(H); }
+
+  /// @brief Map section addresses for the objects associated with the handle H.
+  void mapSectionAddress(ObjSetHandleT H, const void *LocalAddress,
+                         TargetAddress TargetAddr) {
+    BaseLayer.mapSectionAddress(H, LocalAddress, TargetAddr);
+  }
+
+  // Ownership hack.
+  // FIXME: Remove this as soon as RuntimeDyldELF can apply relocations without
+  //        referencing the original object.
+  template <typename OwningMBSet>
+  void takeOwnershipOfBuffers(ObjSetHandleT H, OwningMBSet MBs) {
+    BaseLayer.takeOwnershipOfBuffers(H, std::move(MBs));
+  }
+
+  /// @brief Access the transform functor directly.
+  TransformFtor &getTransform() { return Transform; }
+
+  /// @brief Access the mumate functor directly.
+  const TransformFtor &getTransform() const { return Transform; }
+
+private:
+  BaseLayerT &BaseLayer;
+  TransformFtor Transform;
+};
+
+} // End namespace orc.
+} // End namespace llvm.
+
+#endif // LLVM_EXECUTIONENGINE_ORC_OBJECTTRANSFORMLAYER_H
diff --git a/include/llvm/ExecutionEngine/SectionMemoryManager.h b/include/llvm/ExecutionEngine/SectionMemoryManager.h
index bbf996842188..0b0dcb021f14 100644
--- a/include/llvm/ExecutionEngine/SectionMemoryManager.h
+++ b/include/llvm/ExecutionEngine/SectionMemoryManager.h
@@ -100,7 +100,7 @@ private:
   MemoryGroup RODataMem;
 };
 
-} // namespace llvm
+}
 
 #endif // LLVM_EXECUTION_ENGINE_SECTION_MEMORY_MANAGER_H
 
diff --git a/include/llvm/IR/Argument.h b/include/llvm/IR/Argument.h
index 12c8df570cce..fc04fe71cbf0 100644
--- a/include/llvm/IR/Argument.h
+++ b/include/llvm/IR/Argument.h
@@ -131,6 +131,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/AssemblyAnnotationWriter.h b/include/llvm/IR/AssemblyAnnotationWriter.h
index 1ae30188770c..19e32a2dcdcc 100644
--- a/include/llvm/IR/AssemblyAnnotationWriter.h
+++ b/include/llvm/IR/AssemblyAnnotationWriter.h
@@ -58,6 +58,6 @@ public:
   virtual void printInfoComment(const Value &, formatted_raw_ostream &) {}
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Attributes.h b/include/llvm/IR/Attributes.h
index 1d92d187d54e..366bf709ab16 100644
--- a/include/llvm/IR/Attributes.h
+++ b/include/llvm/IR/Attributes.h
@@ -575,6 +575,6 @@ AttrBuilder typeIncompatible(const Type *Ty);
 
 } // end AttributeFuncs namespace
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/IR/AutoUpgrade.h b/include/llvm/IR/AutoUpgrade.h
index 9ecabec63f65..a4b3c410c4f6 100644
--- a/include/llvm/IR/AutoUpgrade.h
+++ b/include/llvm/IR/AutoUpgrade.h
@@ -66,6 +66,6 @@ namespace llvm {
 
   /// Upgrade a metadata string constant in place.
   void UpgradeMDStringConstant(std::string &String);
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/BasicBlock.h b/include/llvm/IR/BasicBlock.h
index b0fad4f2981f..66581bfedbe6 100644
--- a/include/llvm/IR/BasicBlock.h
+++ b/include/llvm/IR/BasicBlock.h
@@ -346,6 +346,6 @@ inline BasicBlock *ilist_traits<BasicBlock>::createSentinel() const {
 // Create wrappers for C Binding types (see CBindingWrapping.h).
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(BasicBlock, LLVMBasicBlockRef)
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/CFG.h b/include/llvm/IR/CFG.h
index e6e21b4b3be1..f78220a52033 100644
--- a/include/llvm/IR/CFG.h
+++ b/include/llvm/IR/CFG.h
@@ -396,6 +396,6 @@ template <> struct GraphTraits<Inverse<const Function*> > :
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/CallSite.h b/include/llvm/IR/CallSite.h
index 0270caaaf137..dd2903e807e1 100644
--- a/include/llvm/IR/CallSite.h
+++ b/include/llvm/IR/CallSite.h
@@ -38,6 +38,7 @@ class CallInst;
 class InvokeInst;
 
 template <typename FunTy = const Function,
+          typename BBTy = const BasicBlock,
           typename ValTy = const Value,
           typename UserTy = const User,
           typename InstrTy = const Instruction,
@@ -82,6 +83,9 @@ public:
   InstrTy *operator->() const { return I.getPointer(); }
   explicit operator bool() const { return I.getPointer(); }
 
+  /// Get the basic block containing the call site
+  BBTy* getParent() const { return getInstruction()->getParent(); }
+
   /// getCalledValue - Return the pointer to function that is being called.
   ///
   ValTy *getCalledValue() const {
@@ -189,6 +193,20 @@ public:
   else                                   \
     cast<InvokeInst>(II)->METHOD
 
+  unsigned getNumArgOperands() const {
+    CALLSITE_DELEGATE_GETTER(getNumArgOperands());
+  }
+
+  ValTy *getArgOperand(unsigned i) const { 
+    CALLSITE_DELEGATE_GETTER(getArgOperand(i));
+  }
+
+  bool isInlineAsm() const { 
+    if (isCall())
+      return cast<CallInst>(getInstruction())->isInlineAsm();
+    return false;
+  }
+
   /// getCallingConv/setCallingConv - get or set the calling convention of the
   /// call.
   CallingConv::ID getCallingConv() const {
@@ -366,8 +384,9 @@ private:
   }
 };
 
-class CallSite : public CallSiteBase<Function, Value, User, Instruction,
-                                     CallInst, InvokeInst, User::op_iterator> {
+class CallSite : public CallSiteBase<Function, BasicBlock, Value, User,
+                                     Instruction, CallInst, InvokeInst,
+                                     User::op_iterator> {
 public:
   CallSite() {}
   CallSite(CallSiteBase B) : CallSiteBase(B) {}
@@ -397,6 +416,6 @@ public:
   ImmutableCallSite(CallSite CS) : CallSiteBase(CS.getInstruction()) {}
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/CallingConv.h b/include/llvm/IR/CallingConv.h
index 846e58c714c3..9872e6ec794d 100644
--- a/include/llvm/IR/CallingConv.h
+++ b/include/llvm/IR/CallingConv.h
@@ -146,8 +146,8 @@ namespace CallingConv {
     /// in SSE registers.
     X86_VectorCall = 80
   };
-} // namespace CallingConv
+} // End CallingConv namespace
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Comdat.h b/include/llvm/IR/Comdat.h
index 50b11be6c818..4d4c15fb68cd 100644
--- a/include/llvm/IR/Comdat.h
+++ b/include/llvm/IR/Comdat.h
@@ -61,6 +61,6 @@ inline raw_ostream &operator<<(raw_ostream &OS, const Comdat &C) {
   return OS;
 }
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Constant.h b/include/llvm/IR/Constant.h
index 7db09d0b108f..019b4343a133 100644
--- a/include/llvm/IR/Constant.h
+++ b/include/llvm/IR/Constant.h
@@ -47,9 +47,6 @@ protected:
   Constant(Type *ty, ValueTy vty, Use *Ops, unsigned NumOps)
     : User(ty, vty, Ops, NumOps) {}
 
-  void destroyConstantImpl();
-  void replaceUsesOfWithOnConstantImpl(Constant *Replacement);
-
 public:
   /// isNullValue - Return true if this is the value that would be returned by
   /// getNullValue.
@@ -126,14 +123,14 @@ public:
   /// vector of constant integers, all equal, and the common value is returned.
   const APInt &getUniqueInteger() const;
 
-  /// destroyConstant - Called if some element of this constant is no longer
-  /// valid.  At this point only other constants may be on the use_list for this
+  /// Called if some element of this constant is no longer valid.
+  /// At this point only other constants may be on the use_list for this
   /// constant.  Any constants on our Use list must also be destroy'd.  The
   /// implementation must be sure to remove the constant from the list of
-  /// available cached constants.  Implementations should call
-  /// destroyConstantImpl as the last thing they do, to destroy all users and
-  /// delete this.
-  virtual void destroyConstant() { llvm_unreachable("Not reached!"); }
+  /// available cached constants.  Implementations should implement
+  /// destroyConstantImpl to remove constants from any pools/maps they are
+  /// contained it.
+  void destroyConstant();
 
   //// Methods for support type inquiry through isa, cast, and dyn_cast:
   static inline bool classof(const Value *V) {
@@ -141,8 +138,8 @@ public:
            V->getValueID() <= ConstantLastVal;
   }
 
-  /// replaceUsesOfWithOnConstant - This method is a special form of
-  /// User::replaceUsesOfWith (which does not work on constants) that does work
+  /// This method is a special form of User::replaceUsesOfWith
+  /// (which does not work on constants) that does work
   /// on constants.  Basically this method goes through the trouble of building
   /// a new constant that is equivalent to the current one, with all uses of
   /// From replaced with uses of To.  After this construction is completed, all
@@ -151,15 +148,7 @@ public:
   /// use Value::replaceAllUsesWith, which automatically dispatches to this
   /// method as needed.
   ///
-  virtual void replaceUsesOfWithOnConstant(Value *, Value *, Use *) {
-    // Provide a default implementation for constants (like integers) that
-    // cannot use any other values.  This cannot be called at runtime, but needs
-    // to be here to avoid link errors.
-    assert(getNumOperands() == 0 && "replaceUsesOfWithOnConstant must be "
-           "implemented for all constants that have operands!");
-    llvm_unreachable("Constants that do not have operands cannot be using "
-                     "'From'!");
-  }
+  void handleOperandChange(Value *, Value *, Use *);
 
   static Constant *getNullValue(Type* Ty);
 
@@ -187,6 +176,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/ConstantFolder.h b/include/llvm/IR/ConstantFolder.h
index 4e87cd052afd..fb6ca3b3184c 100644
--- a/include/llvm/IR/ConstantFolder.h
+++ b/include/llvm/IR/ConstantFolder.h
@@ -240,6 +240,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/ConstantRange.h b/include/llvm/IR/ConstantRange.h
index 8a7488e13125..9ded3ca36a70 100644
--- a/include/llvm/IR/ConstantRange.h
+++ b/include/llvm/IR/ConstantRange.h
@@ -273,6 +273,6 @@ inline raw_ostream &operator<<(raw_ostream &OS, const ConstantRange &CR) {
   return OS;
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Constants.h b/include/llvm/IR/Constants.h
index b2ef77b2c3ec..0c7a84fc8bfe 100644
--- a/include/llvm/IR/Constants.h
+++ b/include/llvm/IR/Constants.h
@@ -50,6 +50,11 @@ class ConstantInt : public Constant {
   ConstantInt(const ConstantInt &) = delete;
   ConstantInt(IntegerType *Ty, const APInt& V);
   APInt Val;
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   // allocate space for exactly zero operands
   void *operator new(size_t s) {
@@ -231,6 +236,11 @@ class ConstantFP : public Constant {
   void *operator new(size_t, unsigned) = delete;
   ConstantFP(const ConstantFP &) = delete;
   friend class LLVMContextImpl;
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   ConstantFP(Type *Ty, const APFloat& V);
 protected:
@@ -297,6 +307,11 @@ public:
 class ConstantAggregateZero : public Constant {
   void *operator new(size_t, unsigned) = delete;
   ConstantAggregateZero(const ConstantAggregateZero &) = delete;
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   explicit ConstantAggregateZero(Type *ty)
     : Constant(ty, ConstantAggregateZeroVal, nullptr, 0) {}
@@ -308,8 +323,6 @@ protected:
 public:
   static ConstantAggregateZero *get(Type *Ty);
 
-  void destroyConstant() override;
-
   /// getSequentialElement - If this CAZ has array or vector type, return a zero
   /// with the right element type.
   Constant *getSequentialElement() const;
@@ -343,6 +356,11 @@ public:
 class ConstantArray : public Constant {
   friend struct ConstantAggrKeyType<ConstantArray>;
   ConstantArray(const ConstantArray &) = delete;
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   ConstantArray(ArrayType *T, ArrayRef<Constant *> Val);
 public:
@@ -363,9 +381,6 @@ public:
     return cast<ArrayType>(Value::getType());
   }
 
-  void destroyConstant() override;
-  void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) override;
-
   /// Methods for support type inquiry through isa, cast, and dyn_cast:
   static bool classof(const Value *V) {
     return V->getValueID() == ConstantArrayVal;
@@ -385,6 +400,11 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantArray, Constant)
 class ConstantStruct : public Constant {
   friend struct ConstantAggrKeyType<ConstantStruct>;
   ConstantStruct(const ConstantStruct &) = delete;
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   ConstantStruct(StructType *T, ArrayRef<Constant *> Val);
 public:
@@ -421,9 +441,6 @@ public:
     return cast<StructType>(Value::getType());
   }
 
-  void destroyConstant() override;
-  void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) override;
-
   /// Methods for support type inquiry through isa, cast, and dyn_cast:
   static bool classof(const Value *V) {
     return V->getValueID() == ConstantStructVal;
@@ -444,6 +461,11 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantStruct, Constant)
 class ConstantVector : public Constant {
   friend struct ConstantAggrKeyType<ConstantVector>;
   ConstantVector(const ConstantVector &) = delete;
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   ConstantVector(VectorType *T, ArrayRef<Constant *> Val);
 public:
@@ -472,9 +494,6 @@ public:
   /// elements have the same value, return that value. Otherwise return NULL.
   Constant *getSplatValue() const;
 
-  void destroyConstant() override;
-  void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) override;
-
   /// Methods for support type inquiry through isa, cast, and dyn_cast:
   static bool classof(const Value *V) {
     return V->getValueID() == ConstantVectorVal;
@@ -494,6 +513,11 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantVector, Constant)
 class ConstantPointerNull : public Constant {
   void *operator new(size_t, unsigned) = delete;
   ConstantPointerNull(const ConstantPointerNull &) = delete;
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   explicit ConstantPointerNull(PointerType *T)
     : Constant(T,
@@ -508,8 +532,6 @@ public:
   /// get() - Static factory methods - Return objects of the specified value
   static ConstantPointerNull *get(PointerType *T);
 
-  void destroyConstant() override;
-
   /// getType - Specialize the getType() method to always return an PointerType,
   /// which reduces the amount of casting needed in parts of the compiler.
   ///
@@ -545,6 +567,11 @@ class ConstantDataSequential : public Constant {
   ConstantDataSequential *Next;
   void *operator new(size_t, unsigned) = delete;
   ConstantDataSequential(const ConstantDataSequential &) = delete;
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   explicit ConstantDataSequential(Type *ty, ValueTy VT, const char *Data)
     : Constant(ty, VT, nullptr, 0), DataElements(Data), Next(nullptr) {}
@@ -635,8 +662,6 @@ public:
   /// host endianness of the data elements.
   StringRef getRawDataValues() const;
 
-  void destroyConstant() override;
-
   /// Methods for support type inquiry through isa, cast, and dyn_cast:
   ///
   static bool classof(const Value *V) {
@@ -778,6 +803,11 @@ class BlockAddress : public Constant {
   void *operator new(size_t, unsigned) = delete;
   void *operator new(size_t s) { return User::operator new(s, 2); }
   BlockAddress(Function *F, BasicBlock *BB);
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 public:
   /// get - Return a BlockAddress for the specified function and basic block.
   static BlockAddress *get(Function *F, BasicBlock *BB);
@@ -798,9 +828,6 @@ public:
   Function *getFunction() const { return (Function*)Op<0>().get(); }
   BasicBlock *getBasicBlock() const { return (BasicBlock*)Op<1>().get(); }
 
-  void destroyConstant() override;
-  void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) override;
-
   /// Methods for support type inquiry through isa, cast, and dyn_cast:
   static inline bool classof(const Value *V) {
     return V->getValueID() == BlockAddressVal;
@@ -825,6 +852,10 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(BlockAddress, Value)
 class ConstantExpr : public Constant {
   friend struct ConstantExprKeyType;
 
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   ConstantExpr(Type *ty, unsigned Opcode, Use *Ops, unsigned NumOps)
     : Constant(ty, ConstantExprVal, Ops, NumOps) {
@@ -1156,9 +1187,6 @@ public:
   /// would make it harder to remove ConstantExprs altogether.
   Instruction *getAsInstruction();
 
-  void destroyConstant() override;
-  void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) override;
-
   /// Methods for support type inquiry through isa, cast, and dyn_cast:
   static inline bool classof(const Value *V) {
     return V->getValueID() == ConstantExprVal;
@@ -1192,6 +1220,11 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantExpr, Constant)
 class UndefValue : public Constant {
   void *operator new(size_t, unsigned) = delete;
   UndefValue(const UndefValue &) = delete;
+
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   explicit UndefValue(Type *T) : Constant(T, UndefValueVal, nullptr, 0) {}
 protected:
@@ -1224,14 +1257,12 @@ public:
   /// \brief Return the number of elements in the array, vector, or struct.
   unsigned getNumElements() const;
 
-  void destroyConstant() override;
-
   /// Methods for support type inquiry through isa, cast, and dyn_cast:
   static bool classof(const Value *V) {
     return V->getValueID() == UndefValueVal;
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/DIBuilder.h b/include/llvm/IR/DIBuilder.h
index 997113191d19..d6296b622aab 100644
--- a/include/llvm/IR/DIBuilder.h
+++ b/include/llvm/IR/DIBuilder.h
@@ -36,14 +36,9 @@ namespace llvm {
     Module &M;
     LLVMContext &VMContext;
 
-    TempMDTuple TempEnumTypes;
-    TempMDTuple TempRetainTypes;
-    TempMDTuple TempSubprograms;
-    TempMDTuple TempGVs;
-    TempMDTuple TempImportedModules;
-
-    Function *DeclareFn;     // llvm.dbg.declare
-    Function *ValueFn;       // llvm.dbg.value
+    DICompileUnit *CUNode;   ///< The one compile unit created by this DIBuiler.
+    Function *DeclareFn;     ///< llvm.dbg.declare
+    Function *ValueFn;       ///< llvm.dbg.value
 
     SmallVector<Metadata *, 4> AllEnumTypes;
     /// Track the RetainTypes, since they can be updated later on.
@@ -566,6 +561,20 @@ namespace llvm {
     DINamespace *createNameSpace(DIScope *Scope, StringRef Name, DIFile *File,
                                  unsigned LineNo);
 
+    /// createModule - This creates new descriptor for a module
+    /// with the specified parent scope.
+    /// @param Scope       Parent scope
+    /// @param Name        Name of this module
+    /// @param ConfigurationMacros
+    ///                    A space-separated shell-quoted list of -D macro
+    ///                    definitions as they would appear on a command line.
+    /// @param IncludePath The path to the module map file.
+    /// @param ISysRoot    The clang system root (value of -isysroot).
+    DIModule *createModule(DIScope *Scope, StringRef Name,
+                           StringRef ConfigurationMacros,
+                           StringRef IncludePath,
+                           StringRef ISysRoot);
+
     /// createLexicalBlockFile - This creates a descriptor for a lexical
     /// block with a new file attached. This merely extends the existing
     /// lexical block as it crosses a file.
@@ -598,6 +607,13 @@ namespace llvm {
     DIImportedEntity *createImportedModule(DIScope *Context,
                                            DIImportedEntity *NS, unsigned Line);
 
+    /// \brief Create a descriptor for an imported module.
+    /// @param Context The scope this module is imported into
+    /// @param M The module being imported here
+    /// @param Line Line number
+    DIImportedEntity *createImportedModule(DIScope *Context, DIModule *M,
+                                           unsigned Line);
+
     /// \brief Create a descriptor for an imported function.
     /// @param Context The scope this module is imported into
     /// @param Decl The declaration (or definition) of a function, type, or
diff --git a/include/llvm/IR/DataLayout.h b/include/llvm/IR/DataLayout.h
index 81cf66509042..892d6c9936c0 100644
--- a/include/llvm/IR/DataLayout.h
+++ b/include/llvm/IR/DataLayout.h
@@ -222,7 +222,9 @@ public:
   /// This representation is in the same format accepted by the string
   /// constructor above. This should not be used to compare two DataLayout as
   /// different string can represent the same layout.
-  std::string getStringRepresentation() const { return StringRepresentation; }
+  const std::string &getStringRepresentation() const {
+    return StringRepresentation;
+  }
 
   /// \brief Test if the DataLayout was constructed from an empty string.
   bool isDefault() const { return StringRepresentation.empty(); }
@@ -542,6 +544,6 @@ inline uint64_t DataLayout::getTypeSizeInBits(Type *Ty) const {
   }
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/DebugInfoMetadata.h b/include/llvm/IR/DebugInfoMetadata.h
index 03dd90159468..5c99300c35c7 100644
--- a/include/llvm/IR/DebugInfoMetadata.h
+++ b/include/llvm/IR/DebugInfoMetadata.h
@@ -218,6 +218,7 @@ public:
     case DILocalVariableKind:
     case DIObjCPropertyKind:
     case DIImportedEntityKind:
+    case DIModuleKind:
       return true;
     }
   }
@@ -443,6 +444,7 @@ public:
     case DILexicalBlockKind:
     case DILexicalBlockFileKind:
     case DINamespaceKind:
+    case DIModuleKind:
       return true;
     }
   }
@@ -1083,12 +1085,21 @@ public:
   /// deleted on a uniquing collision.  In practice, uniquing collisions on \a
   /// DICompileUnit should be fairly rare.
   /// @{
+  void replaceEnumTypes(DISubprogramArray N) {
+    replaceOperandWith(4, N.get());
+  }
+  void replaceRetainedTypes(DISubprogramArray N) {
+    replaceOperandWith(5, N.get());
+  }
   void replaceSubprograms(DISubprogramArray N) {
     replaceOperandWith(6, N.get());
   }
   void replaceGlobalVariables(DIGlobalVariableArray N) {
     replaceOperandWith(7, N.get());
   }
+  void replaceImportedEntities(DIGlobalVariableArray N) {
+    replaceOperandWith(8, N.get());
+  }
   /// @}
 
   static bool classof(const Metadata *MD) {
@@ -1623,6 +1634,66 @@ public:
   }
 };
 
+/// \brief A (clang) module that has been imported by the compile unit.
+///
+class DIModule : public DIScope {
+  friend class LLVMContextImpl;
+  friend class MDNode;
+
+  DIModule(LLVMContext &Context, StorageType Storage, ArrayRef<Metadata *> Ops)
+      : DIScope(Context, DIModuleKind, Storage, dwarf::DW_TAG_module, Ops) {}
+  ~DIModule() {}
+
+  static DIModule *getImpl(LLVMContext &Context, DIScope *Scope,
+                           StringRef Name, StringRef ConfigurationMacros,
+                           StringRef IncludePath, StringRef ISysRoot,
+                           StorageType Storage, bool ShouldCreate = true) {
+    return getImpl(Context, Scope, getCanonicalMDString(Context, Name),
+                   getCanonicalMDString(Context, ConfigurationMacros),
+		   getCanonicalMDString(Context, IncludePath),
+		   getCanonicalMDString(Context, ISysRoot),
+                   Storage, ShouldCreate);
+  }
+  static DIModule *getImpl(LLVMContext &Context, Metadata *Scope,
+                           MDString *Name, MDString *ConfigurationMacros,
+			   MDString *IncludePath, MDString *ISysRoot,
+			   StorageType Storage, bool ShouldCreate = true);
+
+  TempDIModule cloneImpl() const {
+    return getTemporary(getContext(), getScope(), getName(),
+                        getConfigurationMacros(), getIncludePath(),
+                        getISysRoot());
+  }
+
+public:
+  DEFINE_MDNODE_GET(DIModule, (DIScope *Scope, StringRef Name,
+			       StringRef ConfigurationMacros, StringRef IncludePath,
+			       StringRef ISysRoot),
+                    (Scope, Name, ConfigurationMacros, IncludePath, ISysRoot))
+  DEFINE_MDNODE_GET(DIModule,
+                    (Metadata *Scope, MDString *Name, MDString *ConfigurationMacros,
+		     MDString *IncludePath, MDString *ISysRoot),
+                    (Scope, Name, ConfigurationMacros, IncludePath, ISysRoot))
+
+  TempDIModule clone() const { return cloneImpl(); }
+
+  DIScope *getScope() const { return cast_or_null<DIScope>(getRawScope()); }
+  StringRef getName() const { return getStringOperand(1); }
+  StringRef getConfigurationMacros() const { return getStringOperand(2); }
+  StringRef getIncludePath() const { return getStringOperand(3); }
+  StringRef getISysRoot() const { return getStringOperand(4); }
+
+  Metadata *getRawScope() const { return getOperand(0); }
+  MDString *getRawName() const { return getOperandAs<MDString>(1); }
+  MDString *getRawConfigurationMacros() const { return getOperandAs<MDString>(2); }
+  MDString *getRawIncludePath() const { return getOperandAs<MDString>(3); }
+  MDString *getRawISysRoot() const { return getOperandAs<MDString>(4); }
+
+  static bool classof(const Metadata *MD) {
+    return MD->getMetadataID() == DIModuleKind;
+  }
+};
+
 /// \brief Base class for template parameters.
 class DITemplateParameter : public DINode {
 protected:
diff --git a/include/llvm/IR/DerivedTypes.h b/include/llvm/IR/DerivedTypes.h
index 9f2671a08dc1..4a94499b4cf5 100644
--- a/include/llvm/IR/DerivedTypes.h
+++ b/include/llvm/IR/DerivedTypes.h
@@ -477,6 +477,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Dominators.h b/include/llvm/IR/Dominators.h
index 93f5ede5fc9c..c1f208e3d72f 100644
--- a/include/llvm/IR/Dominators.h
+++ b/include/llvm/IR/Dominators.h
@@ -230,6 +230,6 @@ public:
   void print(raw_ostream &OS, const Module *M = nullptr) const override;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Function.h b/include/llvm/IR/Function.h
index f66ac0b69b4b..02ea056de39b 100644
--- a/include/llvm/IR/Function.h
+++ b/include/llvm/IR/Function.h
@@ -618,6 +618,6 @@ struct OperandTraits<Function> : public OptionalOperandTraits<Function> {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(Function, Value)
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/GVMaterializer.h b/include/llvm/IR/GVMaterializer.h
index 433de3feecdc..1d6c9157f0b8 100644
--- a/include/llvm/IR/GVMaterializer.h
+++ b/include/llvm/IR/GVMaterializer.h
@@ -59,6 +59,6 @@ public:
   virtual std::vector<StructType *> getIdentifiedStructTypes() const = 0;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/GlobalAlias.h b/include/llvm/IR/GlobalAlias.h
index 2316749584c6..ce73b7af8ca1 100644
--- a/include/llvm/IR/GlobalAlias.h
+++ b/include/llvm/IR/GlobalAlias.h
@@ -118,6 +118,6 @@ struct OperandTraits<GlobalAlias> :
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalAlias, Constant)
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/GlobalObject.h b/include/llvm/IR/GlobalObject.h
index 5f58c9c6a52c..f0552410b61d 100644
--- a/include/llvm/IR/GlobalObject.h
+++ b/include/llvm/IR/GlobalObject.h
@@ -71,6 +71,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/GlobalValue.h b/include/llvm/IR/GlobalValue.h
index 5e1c5ffe9b13..f2379705d460 100644
--- a/include/llvm/IR/GlobalValue.h
+++ b/include/llvm/IR/GlobalValue.h
@@ -90,6 +90,10 @@ private:
   // (19 + 3 + 2 + 1 + 2 + 5) == 32.
   unsigned SubClassData : GlobalValueSubClassDataBits;
 
+  friend class Constant;
+  void destroyConstantImpl();
+  Value *handleOperandChangeImpl(Value *From, Value *To, Use *U);
+
 protected:
   /// \brief The intrinsic ID for this subclass (which must be a Function).
   ///
@@ -334,9 +338,6 @@ public:
 
 /// @}
 
-  /// Override from Constant class.
-  void destroyConstant() override;
-
   /// Return true if the primary definition of this global value is outside of
   /// the current translation unit.
   bool isDeclaration() const;
@@ -367,6 +368,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/GlobalVariable.h b/include/llvm/IR/GlobalVariable.h
index 4269a70666f7..a0159830ba3b 100644
--- a/include/llvm/IR/GlobalVariable.h
+++ b/include/llvm/IR/GlobalVariable.h
@@ -45,7 +45,6 @@ class GlobalVariable : public GlobalObject, public ilist_node<GlobalVariable> {
                                                // can change from its initial
                                                // value before global
                                                // initializers are run?
-
 public:
   // allocate space for exactly one operand
   void *operator new(size_t s) {
@@ -166,10 +165,6 @@ public:
   ///
   void eraseFromParent() override;
 
-  /// Override Constant's implementation of this method so we can
-  /// replace constant initializers.
-  void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) override;
-
   // Methods for support type inquiry through isa, cast, and dyn_cast:
   static inline bool classof(const Value *V) {
     return V->getValueID() == Value::GlobalVariableVal;
@@ -183,6 +178,6 @@ struct OperandTraits<GlobalVariable> :
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalVariable, Value)
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/IRBuilder.h b/include/llvm/IR/IRBuilder.h
index 0472ec553ce4..e6b5393c3397 100644
--- a/include/llvm/IR/IRBuilder.h
+++ b/include/llvm/IR/IRBuilder.h
@@ -101,19 +101,8 @@ public:
   void SetInsertPoint(BasicBlock *TheBB, BasicBlock::iterator IP) {
     BB = TheBB;
     InsertPt = IP;
-  }
-
-  /// \brief Find the nearest point that dominates this use, and specify that
-  /// created instructions should be inserted at this point.
-  void SetInsertPoint(Use &U) {
-    Instruction *UseInst = cast<Instruction>(U.getUser());
-    if (PHINode *Phi = dyn_cast<PHINode>(UseInst)) {
-      BasicBlock *PredBB = Phi->getIncomingBlock(U);
-      assert(U != PredBB->getTerminator() && "critical edge not split");
-      SetInsertPoint(PredBB, PredBB->getTerminator());
-      return;
-    }
-    SetInsertPoint(UseInst);
+    if (IP != TheBB->end())
+      SetCurrentDebugLocation(IP->getDebugLoc());
   }
 
   /// \brief Set location information used by debugging information.
@@ -550,13 +539,6 @@ public:
   explicit IRBuilder(Instruction *IP, MDNode *FPMathTag = nullptr)
     : IRBuilderBase(IP->getContext(), FPMathTag), Folder() {
     SetInsertPoint(IP);
-    SetCurrentDebugLocation(IP->getDebugLoc());
-  }
-
-  explicit IRBuilder(Use &U, MDNode *FPMathTag = nullptr)
-    : IRBuilderBase(U->getContext(), FPMathTag), Folder() {
-    SetInsertPoint(U);
-    SetCurrentDebugLocation(cast<Instruction>(U.getUser())->getDebugLoc());
   }
 
   IRBuilder(BasicBlock *TheBB, BasicBlock::iterator IP, const T& F,
@@ -1679,6 +1661,6 @@ public:
 // Create wrappers for C Binding types (see CBindingWrapping.h).
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(IRBuilder<>, LLVMBuilderRef)
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/IRPrintingPasses.h b/include/llvm/IR/IRPrintingPasses.h
index 3969c838758f..5f1d56f7e831 100644
--- a/include/llvm/IR/IRPrintingPasses.h
+++ b/include/llvm/IR/IRPrintingPasses.h
@@ -83,6 +83,6 @@ public:
   static StringRef name() { return "PrintFunctionPass"; }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/InlineAsm.h b/include/llvm/IR/InlineAsm.h
index b5174c81b160..08b51021116c 100644
--- a/include/llvm/IR/InlineAsm.h
+++ b/include/llvm/IR/InlineAsm.h
@@ -358,6 +358,6 @@ public:
 
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/InstIterator.h b/include/llvm/IR/InstIterator.h
index a73d4898c142..f3ce6490fb66 100644
--- a/include/llvm/IR/InstIterator.h
+++ b/include/llvm/IR/InstIterator.h
@@ -153,6 +153,6 @@ inline iterator_range<const_inst_iterator> inst_range(const Function &F) {
   return iterator_range<const_inst_iterator>(inst_begin(F), inst_end(F));
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/InstVisitor.h b/include/llvm/IR/InstVisitor.h
index 0eb337e816ba..581e860b8382 100644
--- a/include/llvm/IR/InstVisitor.h
+++ b/include/llvm/IR/InstVisitor.h
@@ -284,6 +284,6 @@ private:
 
 #undef DELEGATE
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/InstrTypes.h b/include/llvm/IR/InstrTypes.h
index 9df70436a825..b791ded0e194 100644
--- a/include/llvm/IR/InstrTypes.h
+++ b/include/llvm/IR/InstrTypes.h
@@ -139,7 +139,11 @@ protected:
                  const Twine &Name, Instruction *InsertBefore);
   BinaryOperator(BinaryOps iType, Value *S1, Value *S2, Type *Ty,
                  const Twine &Name, BasicBlock *InsertAtEnd);
-  BinaryOperator *clone_impl() const override;
+
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  BinaryOperator *cloneImpl() const;
+
 public:
   // allocate space for exactly two operands
   void *operator new(size_t s) {
@@ -894,6 +898,6 @@ struct OperandTraits<CmpInst> : public FixedNumOperandTraits<CmpInst, 2> {
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CmpInst, Value)
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Instruction.h b/include/llvm/IR/Instruction.h
index 6fea926e7e9f..6e3de1f13545 100644
--- a/include/llvm/IR/Instruction.h
+++ b/include/llvm/IR/Instruction.h
@@ -509,8 +509,10 @@ protected:
               Instruction *InsertBefore = nullptr);
   Instruction(Type *Ty, unsigned iType, Use *Ops, unsigned NumOps,
               BasicBlock *InsertAtEnd);
-  virtual Instruction *clone_impl() const = 0;
 
+private:
+  /// Create a copy of this instruction.
+  Instruction *cloneImpl() const;
 };
 
 inline Instruction *ilist_traits<Instruction>::createSentinel() const {
@@ -536,6 +538,6 @@ public:
   enum { NumLowBitsAvailable = 2 };
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Instructions.h b/include/llvm/IR/Instructions.h
index 369b7db0d295..c5890f01ea70 100644
--- a/include/llvm/IR/Instructions.h
+++ b/include/llvm/IR/Instructions.h
@@ -22,6 +22,7 @@
 #include "llvm/IR/Attributes.h"
 #include "llvm/IR/CallingConv.h"
 #include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Function.h"
 #include "llvm/IR/InstrTypes.h"
 #include "llvm/Support/ErrorHandling.h"
 #include <iterator>
@@ -76,7 +77,10 @@ class AllocaInst : public UnaryInstruction {
   Type *AllocatedType;
 
 protected:
-  AllocaInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  AllocaInst *cloneImpl() const;
+
 public:
   explicit AllocaInst(Type *Ty, Value *ArraySize = nullptr,
                       const Twine &Name = "",
@@ -173,7 +177,10 @@ private:
 class LoadInst : public UnaryInstruction {
   void AssertOK();
 protected:
-  LoadInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  LoadInst *cloneImpl() const;
+
 public:
   LoadInst(Value *Ptr, const Twine &NameStr, Instruction *InsertBefore);
   LoadInst(Value *Ptr, const Twine &NameStr, BasicBlock *InsertAtEnd);
@@ -310,7 +317,10 @@ class StoreInst : public Instruction {
   void *operator new(size_t, unsigned) = delete;
   void AssertOK();
 protected:
-  StoreInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  StoreInst *cloneImpl() const;
+
 public:
   // allocate space for exactly two operands
   void *operator new(size_t s) {
@@ -436,7 +446,10 @@ class FenceInst : public Instruction {
   void *operator new(size_t, unsigned) = delete;
   void Init(AtomicOrdering Ordering, SynchronizationScope SynchScope);
 protected:
-  FenceInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  FenceInst *cloneImpl() const;
+
 public:
   // allocate space for exactly zero operands
   void *operator new(size_t s) {
@@ -505,7 +518,10 @@ class AtomicCmpXchgInst : public Instruction {
             AtomicOrdering SuccessOrdering, AtomicOrdering FailureOrdering,
             SynchronizationScope SynchScope);
 protected:
-  AtomicCmpXchgInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  AtomicCmpXchgInst *cloneImpl() const;
+
 public:
   // allocate space for exactly three operands
   void *operator new(size_t s) {
@@ -658,7 +674,10 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(AtomicCmpXchgInst, Value)
 class AtomicRMWInst : public Instruction {
   void *operator new(size_t, unsigned) = delete;
 protected:
-  AtomicRMWInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  AtomicRMWInst *cloneImpl() const;
+
 public:
   /// This enumeration lists the possible modifications atomicrmw can make.  In
   /// the descriptions, 'p' is the pointer to the instruction's memory location,
@@ -827,7 +846,10 @@ class GetElementPtrInst : public Instruction {
                            const Twine &NameStr, BasicBlock *InsertAtEnd);
 
 protected:
-  GetElementPtrInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  GetElementPtrInst *cloneImpl() const;
+
 public:
   static GetElementPtrInst *Create(Type *PointeeType, Value *Ptr,
                                    ArrayRef<Value *> IdxList,
@@ -1078,8 +1100,11 @@ class ICmpInst: public CmpInst {
   }
 
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical ICmpInst
-  ICmpInst *clone_impl() const override;
+  ICmpInst *cloneImpl() const;
+
 public:
   /// \brief Constructor with insert-before-instruction semantics.
   ICmpInst(
@@ -1210,8 +1235,11 @@ public:
 /// \brief Represents a floating point comparison operator.
 class FCmpInst: public CmpInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical FCmpInst
-  FCmpInst *clone_impl() const override;
+  FCmpInst *cloneImpl() const;
+
 public:
   /// \brief Constructor with insert-before-instruction semantics.
   FCmpInst(
@@ -1350,7 +1378,10 @@ class CallInst : public Instruction {
                     Instruction *InsertBefore);
   CallInst(Value *F, const Twine &NameStr, BasicBlock *InsertAtEnd);
 protected:
-  CallInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  CallInst *cloneImpl() const;
+
 public:
   static CallInst *Create(Value *Func,
                           ArrayRef<Value *> Args,
@@ -1478,6 +1509,9 @@ public:
   /// addAttribute - adds the attribute to the list of attributes.
   void addAttribute(unsigned i, Attribute::AttrKind attr);
 
+  /// addAttribute - adds the attribute to the list of attributes.
+  void addAttribute(unsigned i, StringRef Kind, StringRef Value);
+
   /// removeAttribute - removes the attribute from the list of attributes.
   void removeAttribute(unsigned i, Attribute attr);
 
@@ -1495,6 +1529,11 @@ public:
     return hasFnAttrImpl(A);
   }
 
+  /// \brief Determine whether this call has the given attribute.
+  bool hasFnAttr(StringRef A) const {
+    return hasFnAttrImpl(A);
+  }
+
   /// \brief Determine whether the call or the callee has the given attributes.
   bool paramHasAttr(unsigned i, Attribute::AttrKind A) const;
 
@@ -1621,7 +1660,14 @@ public:
   }
 private:
 
-  bool hasFnAttrImpl(Attribute::AttrKind A) const;
+  template<typename AttrKind>
+  bool hasFnAttrImpl(AttrKind A) const {
+    if (AttributeList.hasAttribute(AttributeSet::FunctionIndex, A))
+      return true;
+    if (const Function *F = getCalledFunction())
+      return F->getAttributes().hasAttribute(AttributeSet::FunctionIndex, A);
+    return false;
+  }
 
   // Shadow Instruction::setInstructionSubclassData with a private forwarding
   // method so that subclasses cannot accidentally use it.
@@ -1687,7 +1733,10 @@ class SelectInst : public Instruction {
     setName(NameStr);
   }
 protected:
-  SelectInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  SelectInst *cloneImpl() const;
+
 public:
   static SelectInst *Create(Value *C, Value *S1, Value *S2,
                             const Twine &NameStr = "",
@@ -1742,7 +1791,9 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(SelectInst, Value)
 ///
 class VAArgInst : public UnaryInstruction {
 protected:
-  VAArgInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  VAArgInst *cloneImpl() const;
 
 public:
   VAArgInst(Value *List, Type *Ty, const Twine &NameStr = "",
@@ -1782,7 +1833,9 @@ class ExtractElementInst : public Instruction {
   ExtractElementInst(Value *Vec, Value *Idx, const Twine &NameStr,
                      BasicBlock *InsertAtEnd);
 protected:
-  ExtractElementInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  ExtractElementInst *cloneImpl() const;
 
 public:
   static ExtractElementInst *Create(Value *Vec, Value *Idx,
@@ -1843,7 +1896,9 @@ class InsertElementInst : public Instruction {
   InsertElementInst(Value *Vec, Value *NewElt, Value *Idx,
                     const Twine &NameStr, BasicBlock *InsertAtEnd);
 protected:
-  InsertElementInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  InsertElementInst *cloneImpl() const;
 
 public:
   static InsertElementInst *Create(Value *Vec, Value *NewElt, Value *Idx,
@@ -1896,7 +1951,9 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(InsertElementInst, Value)
 ///
 class ShuffleVectorInst : public Instruction {
 protected:
-  ShuffleVectorInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  ShuffleVectorInst *cloneImpl() const;
 
 public:
   // allocate space for exactly three operands
@@ -1997,7 +2054,9 @@ class ExtractValueInst : public UnaryInstruction {
     return User::operator new(s, 1);
   }
 protected:
-  ExtractValueInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  ExtractValueInst *cloneImpl() const;
 
 public:
   static ExtractValueInst *Create(Value *Agg,
@@ -2111,7 +2170,10 @@ class InsertValueInst : public Instruction {
   InsertValueInst(Value *Agg, Value *Val, unsigned Idx,
                   const Twine &NameStr, BasicBlock *InsertAtEnd);
 protected:
-  InsertValueInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  InsertValueInst *cloneImpl() const;
+
 public:
   // allocate space for exactly two operands
   void *operator new(size_t s) {
@@ -2252,7 +2314,10 @@ protected:
     User::allocHungoffUses(N, /* IsPhi */ true);
   }
 
-  PHINode *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  PHINode *cloneImpl() const;
+
 public:
   /// Constructors - NumReservedValues is a hint for the number of incoming
   /// edges that this phi node will have (use 0 if you really have no idea).
@@ -2445,7 +2510,10 @@ private:
                           const Twine &NameStr, BasicBlock *InsertAtEnd);
 
 protected:
-  LandingPadInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  LandingPadInst *cloneImpl() const;
+
 public:
   /// Constructors - NumReservedClauses is a hint for the number of incoming
   /// clauses that this landingpad will have (use 0 if you really have no idea).
@@ -2538,7 +2606,10 @@ private:
   ReturnInst(LLVMContext &C, Value *retVal, BasicBlock *InsertAtEnd);
   explicit ReturnInst(LLVMContext &C, BasicBlock *InsertAtEnd);
 protected:
-  ReturnInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  ReturnInst *cloneImpl() const;
+
 public:
   static ReturnInst* Create(LLVMContext &C, Value *retVal = nullptr,
                             Instruction *InsertBefore = nullptr) {
@@ -2610,7 +2681,10 @@ class BranchInst : public TerminatorInst {
   BranchInst(BasicBlock *IfTrue, BasicBlock *IfFalse, Value *Cond,
              BasicBlock *InsertAtEnd);
 protected:
-  BranchInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  BranchInst *cloneImpl() const;
+
 public:
   static BranchInst *Create(BasicBlock *IfTrue,
                             Instruction *InsertBefore = nullptr) {
@@ -2717,7 +2791,10 @@ class SwitchInst : public TerminatorInst {
   SwitchInst(Value *Value, BasicBlock *Default, unsigned NumCases,
              BasicBlock *InsertAtEnd);
 protected:
-  SwitchInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  SwitchInst *cloneImpl() const;
+
 public:
 
   // -2
@@ -3022,7 +3099,10 @@ class IndirectBrInst : public TerminatorInst {
   /// autoinserts at the end of the specified BasicBlock.
   IndirectBrInst(Value *Address, unsigned NumDests, BasicBlock *InsertAtEnd);
 protected:
-  IndirectBrInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  IndirectBrInst *cloneImpl() const;
+
 public:
   static IndirectBrInst *Create(Value *Address, unsigned NumDests,
                                 Instruction *InsertBefore = nullptr) {
@@ -3129,7 +3209,10 @@ class InvokeInst : public TerminatorInst {
                     ArrayRef<Value *> Args, unsigned Values,
                     const Twine &NameStr, BasicBlock *InsertAtEnd);
 protected:
-  InvokeInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  InvokeInst *cloneImpl() const;
+
 public:
   static InvokeInst *Create(Value *Func,
                             BasicBlock *IfNormal, BasicBlock *IfException,
@@ -3424,7 +3507,10 @@ class ResumeInst : public TerminatorInst {
   explicit ResumeInst(Value *Exn, Instruction *InsertBefore=nullptr);
   ResumeInst(Value *Exn, BasicBlock *InsertAtEnd);
 protected:
-  ResumeInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  ResumeInst *cloneImpl() const;
+
 public:
   static ResumeInst *Create(Value *Exn, Instruction *InsertBefore = nullptr) {
     return new(1) ResumeInst(Exn, InsertBefore);
@@ -3473,7 +3559,9 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ResumeInst, Value)
 class UnreachableInst : public TerminatorInst {
   void *operator new(size_t, unsigned) = delete;
 protected:
-  UnreachableInst *clone_impl() const override;
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
+  UnreachableInst *cloneImpl() const;
 
 public:
   // allocate space for exactly zero operands
@@ -3505,8 +3593,10 @@ private:
 /// \brief This class represents a truncation of integer types.
 class TruncInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical TruncInst
-  TruncInst *clone_impl() const override;
+  TruncInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3541,8 +3631,10 @@ public:
 /// \brief This class represents zero extension of integer types.
 class ZExtInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical ZExtInst
-  ZExtInst *clone_impl() const override;
+  ZExtInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3577,8 +3669,10 @@ public:
 /// \brief This class represents a sign extension of integer types.
 class SExtInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical SExtInst
-  SExtInst *clone_impl() const override;
+  SExtInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3613,8 +3707,10 @@ public:
 /// \brief This class represents a truncation of floating point types.
 class FPTruncInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical FPTruncInst
-  FPTruncInst *clone_impl() const override;
+  FPTruncInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3649,8 +3745,10 @@ public:
 /// \brief This class represents an extension of floating point types.
 class FPExtInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical FPExtInst
-  FPExtInst *clone_impl() const override;
+  FPExtInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3685,8 +3783,10 @@ public:
 /// \brief This class represents a cast unsigned integer to floating point.
 class UIToFPInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical UIToFPInst
-  UIToFPInst *clone_impl() const override;
+  UIToFPInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3721,8 +3821,10 @@ public:
 /// \brief This class represents a cast from signed integer to floating point.
 class SIToFPInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical SIToFPInst
-  SIToFPInst *clone_impl() const override;
+  SIToFPInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3757,8 +3859,10 @@ public:
 /// \brief This class represents a cast from floating point to unsigned integer
 class FPToUIInst  : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical FPToUIInst
-  FPToUIInst *clone_impl() const override;
+  FPToUIInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3793,8 +3897,10 @@ public:
 /// \brief This class represents a cast from floating point to signed integer.
 class FPToSIInst  : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical FPToSIInst
-  FPToSIInst *clone_impl() const override;
+  FPToSIInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3845,8 +3951,10 @@ public:
     BasicBlock *InsertAtEnd       ///< The block to insert the instruction into
   );
 
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical IntToPtrInst
-  IntToPtrInst *clone_impl() const override;
+  IntToPtrInst *cloneImpl() const;
 
   /// \brief Returns the address space of this instruction's pointer type.
   unsigned getAddressSpace() const {
@@ -3869,8 +3977,10 @@ public:
 /// \brief This class represents a cast from a pointer to an integer
 class PtrToIntInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical PtrToIntInst
-  PtrToIntInst *clone_impl() const override;
+  PtrToIntInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3917,8 +4027,10 @@ public:
 /// \brief This class represents a no-op cast from one type to another.
 class BitCastInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical BitCastInst
-  BitCastInst *clone_impl() const override;
+  BitCastInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3954,8 +4066,10 @@ public:
 /// one address space to another.
 class AddrSpaceCastInst : public CastInst {
 protected:
+  // Note: Instruction needs to be a friend here to call cloneImpl.
+  friend class Instruction;
   /// \brief Clone an identical AddrSpaceCastInst
-  AddrSpaceCastInst *clone_impl() const override;
+  AddrSpaceCastInst *cloneImpl() const;
 
 public:
   /// \brief Constructor with insert-before-instruction semantics
@@ -3983,6 +4097,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/IntrinsicInst.h b/include/llvm/IR/IntrinsicInst.h
index 102cbef3b680..2c8b6eb6f39a 100644
--- a/include/llvm/IR/IntrinsicInst.h
+++ b/include/llvm/IR/IntrinsicInst.h
@@ -372,6 +372,6 @@ namespace llvm {
       return cast<ConstantInt>(const_cast<Value *>(getArgOperand(3)));
     }
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/Intrinsics.h b/include/llvm/IR/Intrinsics.h
index 01781d51bec1..43b8325107fa 100644
--- a/include/llvm/IR/Intrinsics.h
+++ b/include/llvm/IR/Intrinsics.h
@@ -126,8 +126,8 @@ namespace Intrinsic {
   /// of IITDescriptors.
   void getIntrinsicInfoTableEntries(ID id, SmallVectorImpl<IITDescriptor> &T);
 
-} // namespace Intrinsic
+} // End Intrinsic namespace
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/IntrinsicsARM.td b/include/llvm/IR/IntrinsicsARM.td
index ce758e257312..1dff80878592 100644
--- a/include/llvm/IR/IntrinsicsARM.td
+++ b/include/llvm/IR/IntrinsicsARM.td
@@ -83,11 +83,9 @@ def int_arm_vcvtru    : Intrinsic<[llvm_float_ty], [llvm_anyfloat_ty],
 
 // Move to coprocessor
 def int_arm_mcr : GCCBuiltin<"__builtin_arm_mcr">,
-                  MSBuiltin<"_MoveToCoprocessor">,
    Intrinsic<[], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty,
                   llvm_i32_ty, llvm_i32_ty, llvm_i32_ty], []>;
 def int_arm_mcr2 : GCCBuiltin<"__builtin_arm_mcr2">,
-                   MSBuiltin<"_MoveToCoprocessor2">,
    Intrinsic<[], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty,
                   llvm_i32_ty, llvm_i32_ty, llvm_i32_ty], []>;
 
diff --git a/include/llvm/IR/IntrinsicsPowerPC.td b/include/llvm/IR/IntrinsicsPowerPC.td
index d680085eaf32..05adc5a757be 100644
--- a/include/llvm/IR/IntrinsicsPowerPC.td
+++ b/include/llvm/IR/IntrinsicsPowerPC.td
@@ -687,6 +687,32 @@ def int_ppc_vsx_xsmindp : PowerPC_VSX_Sca_DDD_Intrinsic<"xsmindp">;
 // Vector divide.
 def int_ppc_vsx_xvdivdp : PowerPC_VSX_Vec_DDD_Intrinsic<"xvdivdp">;
 def int_ppc_vsx_xvdivsp : PowerPC_VSX_Vec_FFF_Intrinsic<"xvdivsp">;
+
+// Vector round-to-infinity (ceil)
+def int_ppc_vsx_xvrspip :
+      Intrinsic<[llvm_v4f32_ty], [llvm_v4f32_ty], [IntrNoMem]>;
+def int_ppc_vsx_xvrdpip :
+      Intrinsic<[llvm_v2f64_ty], [llvm_v2f64_ty], [IntrNoMem]>;
+
+// Vector compare
+def int_ppc_vsx_xvcmpeqdp :
+      PowerPC_VSX_Intrinsic<"xvcmpeqdp", [llvm_v2i64_ty],
+                            [llvm_v2f64_ty, llvm_v2f64_ty], [IntrNoMem]>;
+def int_ppc_vsx_xvcmpeqsp :
+      PowerPC_VSX_Intrinsic<"xvcmpeqsp", [llvm_v4i32_ty],
+                            [llvm_v4f32_ty, llvm_v4f32_ty], [IntrNoMem]>;
+def int_ppc_vsx_xvcmpgedp :
+      PowerPC_VSX_Intrinsic<"xvcmpgedp", [llvm_v2i64_ty],
+                            [llvm_v2f64_ty, llvm_v2f64_ty], [IntrNoMem]>;
+def int_ppc_vsx_xvcmpgesp :
+      PowerPC_VSX_Intrinsic<"xvcmpgesp", [llvm_v4i32_ty],
+                            [llvm_v4f32_ty, llvm_v4f32_ty], [IntrNoMem]>;
+def int_ppc_vsx_xvcmpgtdp :
+      PowerPC_VSX_Intrinsic<"xvcmpgtdp", [llvm_v2i64_ty],
+                            [llvm_v2f64_ty, llvm_v2f64_ty], [IntrNoMem]>;
+def int_ppc_vsx_xvcmpgtsp :
+      PowerPC_VSX_Intrinsic<"xvcmpgtsp", [llvm_v4i32_ty],
+                            [llvm_v4f32_ty, llvm_v4f32_ty], [IntrNoMem]>;
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/include/llvm/IR/IntrinsicsX86.td b/include/llvm/IR/IntrinsicsX86.td
index 1bed31c842bb..b90825db93cd 100644
--- a/include/llvm/IR/IntrinsicsX86.td
+++ b/include/llvm/IR/IntrinsicsX86.td
@@ -21,9 +21,17 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
 // SEH intrinsics for Windows
 let TargetPrefix = "x86" in {
   def int_x86_seh_lsda : Intrinsic<[llvm_ptr_ty], [llvm_ptr_ty], [IntrNoMem]>;
-  def int_x86_seh_exceptioninfo : Intrinsic<[llvm_ptr_ty],
-                                            [llvm_ptr_ty, llvm_ptr_ty],
-					    [IntrReadMem]>;
+
+  // Restores the frame, base, and stack pointers as necessary after recovering
+  // from an exception. Any block resuming control flow in the parent function
+  // should call this before accessing any stack memory.
+  def int_x86_seh_restoreframe : Intrinsic<[], [], []>;
+
+  // Given a pointer to the end of an EH registration object, returns the true
+  // parent frame address that can be used with llvm.framerecover.
+  def int_x86_seh_recoverfp : Intrinsic<[llvm_ptr_ty],
+                                        [llvm_ptr_ty, llvm_ptr_ty],
+                                        [IntrNoMem]>;
 }
 
 //===----------------------------------------------------------------------===//
@@ -1132,28 +1140,292 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
         Intrinsic<[llvm_v8i32_ty], [llvm_v8i32_ty,
                   llvm_v8i32_ty, llvm_i8_ty], [IntrNoMem]>;
 
-  def int_x86_avx512_mask_vpermt_d_512:
+  def int_x86_avx512_mask_vpermi2var_d_128 : 
+       GCCBuiltin<"__builtin_ia32_vpermi2vard128_mask">,
+        Intrinsic<[llvm_v4i32_ty],
+        [llvm_v4i32_ty, llvm_v4i32_ty, llvm_v4i32_ty, llvm_i8_ty],
+        [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_d_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2vard256_mask">,
+          Intrinsic<[llvm_v8i32_ty],
+          [llvm_v8i32_ty, llvm_v8i32_ty, llvm_v8i32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_d_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2vard512_mask">,
+          Intrinsic<[llvm_v16i32_ty],
+          [llvm_v16i32_ty, llvm_v16i32_ty, llvm_v16i32_ty, llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_hi_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varhi128_mask">,
+          Intrinsic<[llvm_v8i16_ty],
+          [llvm_v8i16_ty, llvm_v8i16_ty, llvm_v8i16_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_hi_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varhi256_mask">,
+          Intrinsic<[llvm_v16i16_ty],
+          [llvm_v16i16_ty, llvm_v16i16_ty, llvm_v16i16_ty, llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_hi_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varhi512_mask">,
+          Intrinsic<[llvm_v32i16_ty],
+          [llvm_v32i16_ty, llvm_v32i16_ty, llvm_v32i16_ty, llvm_i32_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_pd_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varpd128_mask">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2i64_ty, llvm_v2f64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_pd_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varpd256_mask">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4i64_ty, llvm_v4f64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_pd_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varpd512_mask">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8i64_ty, llvm_v8f64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_ps_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varps128_mask">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4i32_ty, llvm_v4f32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_ps_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varps256_mask">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8i32_ty, llvm_v8f32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_ps_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varps512_mask">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16i32_ty, llvm_v16f32_ty, llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_q_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varq128_mask">,
+          Intrinsic<[llvm_v2i64_ty],
+          [llvm_v2i64_ty, llvm_v2i64_ty, llvm_v2i64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_q_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varq256_mask">,
+          Intrinsic<[llvm_v4i64_ty],
+          [llvm_v4i64_ty, llvm_v4i64_ty, llvm_v4i64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermi2var_q_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermi2varq512_mask">,
+          Intrinsic<[llvm_v8i64_ty],
+          [llvm_v8i64_ty, llvm_v8i64_ty, llvm_v8i64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_d_512:
         GCCBuiltin<"__builtin_ia32_vpermt2vard512_mask">,
         Intrinsic<[llvm_v16i32_ty], [llvm_v16i32_ty,
                   llvm_v16i32_ty, llvm_v16i32_ty, llvm_i16_ty], [IntrNoMem]>;
 
-  def int_x86_avx512_mask_vpermt_q_512:
+  def int_x86_avx512_mask_vpermt2var_q_512:
         GCCBuiltin<"__builtin_ia32_vpermt2varq512_mask">,
         Intrinsic<[llvm_v8i64_ty], [llvm_v8i64_ty,
                   llvm_v8i64_ty, llvm_v8i64_ty, llvm_i8_ty], [IntrNoMem]>;
 
-  def int_x86_avx512_mask_vpermt_ps_512:
+  def int_x86_avx512_mask_vpermt2var_ps_512:
         GCCBuiltin<"__builtin_ia32_vpermt2varps512_mask">,
         Intrinsic<[llvm_v16f32_ty], [llvm_v16i32_ty,
                   llvm_v16f32_ty, llvm_v16f32_ty, llvm_i16_ty], [IntrNoMem]>;
 
-  def int_x86_avx512_mask_vpermt_pd_512:
+  def int_x86_avx512_mask_vpermt2var_pd_512:
         GCCBuiltin<"__builtin_ia32_vpermt2varpd512_mask">,
         Intrinsic<[llvm_v8f64_ty], [llvm_v8i64_ty,
                   llvm_v8f64_ty, llvm_v8f64_ty, llvm_i8_ty], [IntrNoMem]>;
 
+  def int_x86_avx512_mask_vpermt2var_d_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2vard128_mask">,
+          Intrinsic<[llvm_v4i32_ty],
+          [llvm_v4i32_ty, llvm_v4i32_ty, llvm_v4i32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_d_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2vard128_maskz">,
+          Intrinsic<[llvm_v4i32_ty],
+          [llvm_v4i32_ty, llvm_v4i32_ty, llvm_v4i32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_d_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2vard256_mask">,
+          Intrinsic<[llvm_v8i32_ty],
+          [llvm_v8i32_ty, llvm_v8i32_ty, llvm_v8i32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_d_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2vard256_maskz">,
+          Intrinsic<[llvm_v8i32_ty],
+          [llvm_v8i32_ty, llvm_v8i32_ty, llvm_v8i32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_d_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2vard512_maskz">,
+          Intrinsic<[llvm_v16i32_ty],
+          [llvm_v16i32_ty, llvm_v16i32_ty, llvm_v16i32_ty, llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_hi_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varhi128_mask">,
+          Intrinsic<[llvm_v8i16_ty],
+          [llvm_v8i16_ty, llvm_v8i16_ty, llvm_v8i16_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_hi_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varhi128_maskz">,
+          Intrinsic<[llvm_v8i16_ty],
+          [llvm_v8i16_ty, llvm_v8i16_ty, llvm_v8i16_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_hi_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varhi256_mask">,
+          Intrinsic<[llvm_v16i16_ty],
+          [llvm_v16i16_ty, llvm_v16i16_ty, llvm_v16i16_ty, llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_hi_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varhi256_maskz">,
+          Intrinsic<[llvm_v16i16_ty],
+          [llvm_v16i16_ty, llvm_v16i16_ty, llvm_v16i16_ty, llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_hi_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varhi512_mask">,
+          Intrinsic<[llvm_v32i16_ty],
+          [llvm_v32i16_ty, llvm_v32i16_ty, llvm_v32i16_ty, llvm_i32_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_hi_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varhi512_maskz">,
+          Intrinsic<[llvm_v32i16_ty],
+          [llvm_v32i16_ty, llvm_v32i16_ty, llvm_v32i16_ty, llvm_i32_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_pd_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varpd128_mask">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2i64_ty, llvm_v2f64_ty, llvm_v2f64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_pd_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varpd128_maskz">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2i64_ty, llvm_v2f64_ty, llvm_v2f64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_pd_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varpd256_mask">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4i64_ty, llvm_v4f64_ty, llvm_v4f64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_pd_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varpd256_maskz">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4i64_ty, llvm_v4f64_ty, llvm_v4f64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_pd_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varpd512_maskz">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8i64_ty, llvm_v8f64_ty, llvm_v8f64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_ps_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varps128_mask">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4i32_ty, llvm_v4f32_ty, llvm_v4f32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_ps_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varps128_maskz">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4i32_ty, llvm_v4f32_ty, llvm_v4f32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_ps_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varps256_mask">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8i32_ty, llvm_v8f32_ty, llvm_v8f32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_ps_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varps256_maskz">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8i32_ty, llvm_v8f32_ty, llvm_v8f32_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_ps_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varps512_maskz">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16i32_ty, llvm_v16f32_ty, llvm_v16f32_ty, llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_q_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varq128_mask">,
+          Intrinsic<[llvm_v2i64_ty],
+          [llvm_v2i64_ty, llvm_v2i64_ty, llvm_v2i64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_q_128 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varq128_maskz">,
+          Intrinsic<[llvm_v2i64_ty],
+          [llvm_v2i64_ty, llvm_v2i64_ty, llvm_v2i64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vpermt2var_q_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varq256_mask">,
+          Intrinsic<[llvm_v4i64_ty],
+          [llvm_v4i64_ty, llvm_v4i64_ty, llvm_v4i64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_q_256 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varq256_maskz">,
+          Intrinsic<[llvm_v4i64_ty],
+          [llvm_v4i64_ty, llvm_v4i64_ty, llvm_v4i64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vpermt2var_q_512 : 
+        GCCBuiltin<"__builtin_ia32_vpermt2varq512_maskz">,
+          Intrinsic<[llvm_v8i64_ty],
+          [llvm_v8i64_ty, llvm_v8i64_ty, llvm_v8i64_ty, llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pshuf_b_128 : 
+        GCCBuiltin<"__builtin_ia32_pshufb128_mask">,
+          Intrinsic<[llvm_v16i8_ty],
+          [llvm_v16i8_ty, llvm_v16i8_ty, llvm_v16i8_ty,  llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pshuf_b_256 : 
+        GCCBuiltin<"__builtin_ia32_pshufb256_mask">,
+          Intrinsic<[llvm_v32i8_ty],
+          [llvm_v32i8_ty, llvm_v32i8_ty, llvm_v32i8_ty,  llvm_i32_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pshuf_b_512 : 
+        GCCBuiltin<"__builtin_ia32_pshufb512_mask">,
+          Intrinsic<[llvm_v64i8_ty],
+          [llvm_v64i8_ty, llvm_v64i8_ty, llvm_v64i8_ty,  llvm_i64_ty],
+          [IntrNoMem]>;
 }
 
+
 // Vector blend
 let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
   def int_x86_avx_blendv_pd_256 : GCCBuiltin<"__builtin_ia32_blendvpd256">,
@@ -1718,12 +1990,78 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
               Intrinsic<[llvm_v16i16_ty], [llvm_v16i16_ty], [IntrNoMem]>;
   def int_x86_avx2_pabs_d : GCCBuiltin<"__builtin_ia32_pabsd256">,
               Intrinsic<[llvm_v8i32_ty], [llvm_v8i32_ty], [IntrNoMem]>;
-  def int_x86_avx512_mask_pabs_d_512 : GCCBuiltin<"__builtin_ia32_pabsd512_mask">,
-              Intrinsic<[llvm_v16i32_ty], [llvm_v16i32_ty, llvm_v16i32_ty,
-                                           llvm_i16_ty], [IntrNoMem]>;
-  def int_x86_avx512_mask_pabs_q_512 : GCCBuiltin<"__builtin_ia32_pabsq512_mask">,
-              Intrinsic<[llvm_v8i64_ty], [llvm_v8i64_ty, llvm_v8i64_ty,
-                                          llvm_i8_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_b_128 : 
+       GCCBuiltin<"__builtin_ia32_pabsb128_mask">,
+        Intrinsic<[llvm_v16i8_ty],
+        [llvm_v16i8_ty, llvm_v16i8_ty,  llvm_i16_ty],
+        [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_b_256 : 
+        GCCBuiltin<"__builtin_ia32_pabsb256_mask">,
+          Intrinsic<[llvm_v32i8_ty],
+          [llvm_v32i8_ty, llvm_v32i8_ty,  llvm_i32_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_b_512 : 
+        GCCBuiltin<"__builtin_ia32_pabsb512_mask">,
+          Intrinsic<[llvm_v64i8_ty],
+          [llvm_v64i8_ty, llvm_v64i8_ty,  llvm_i64_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_d_128 : 
+        GCCBuiltin<"__builtin_ia32_pabsd128_mask">,
+          Intrinsic<[llvm_v4i32_ty],
+          [llvm_v4i32_ty, llvm_v4i32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_d_256 : 
+        GCCBuiltin<"__builtin_ia32_pabsd256_mask">,
+          Intrinsic<[llvm_v8i32_ty],
+          [llvm_v8i32_ty, llvm_v8i32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_d_512 : 
+        GCCBuiltin<"__builtin_ia32_pabsd512_mask">,
+          Intrinsic<[llvm_v16i32_ty],
+          [llvm_v16i32_ty, llvm_v16i32_ty,  llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_q_128 : 
+        GCCBuiltin<"__builtin_ia32_pabsq128_mask">,
+          Intrinsic<[llvm_v2i64_ty],
+          [llvm_v2i64_ty, llvm_v2i64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_q_256 : 
+        GCCBuiltin<"__builtin_ia32_pabsq256_mask">,
+          Intrinsic<[llvm_v4i64_ty],
+          [llvm_v4i64_ty, llvm_v4i64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_q_512 : 
+        GCCBuiltin<"__builtin_ia32_pabsq512_mask">,
+          Intrinsic<[llvm_v8i64_ty],
+          [llvm_v8i64_ty, llvm_v8i64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_w_128 : 
+        GCCBuiltin<"__builtin_ia32_pabsw128_mask">,
+          Intrinsic<[llvm_v8i16_ty],
+          [llvm_v8i16_ty, llvm_v8i16_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_w_256 : 
+        GCCBuiltin<"__builtin_ia32_pabsw256_mask">,
+          Intrinsic<[llvm_v16i16_ty],
+          [llvm_v16i16_ty, llvm_v16i16_ty,  llvm_i16_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_pabs_w_512 : 
+        GCCBuiltin<"__builtin_ia32_pabsw512_mask">,
+          Intrinsic<[llvm_v32i16_ty],
+          [llvm_v32i16_ty, llvm_v32i16_ty,  llvm_i32_ty],
+          [IntrNoMem]>;
 }
 
 // Horizontal arithmetic ops
@@ -2120,36 +2458,7 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
               Intrinsic<[llvm_v4f64_ty],
                         [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty],
                         [IntrNoMem]>;
-  def int_x86_fma_mask_vfmadd_ps_512 : GCCBuiltin<"__builtin_ia32_vfmaddps512_mask">,
-              Intrinsic<[llvm_v16f32_ty],
-                        [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,
-                         llvm_i16_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmadd_ps_256 : GCCBuiltin<"__builtin_ia32_vfmaddps256_mask">,
-              Intrinsic<[llvm_v8f32_ty],
-                        [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmadd_ps_128 : GCCBuiltin<"__builtin_ia32_vfmaddps128_mask">,
-              Intrinsic<[llvm_v4f32_ty],
-                        [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmadd_pd_512 : GCCBuiltin<"__builtin_ia32_vfmaddpd512_mask">,
-              Intrinsic<[llvm_v8f64_ty],
-                        [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,
-                         llvm_i8_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmadd_pd_256 : GCCBuiltin<"__builtin_ia32_vfmaddpd256_mask">,
-              Intrinsic<[llvm_v4f64_ty],
-                        [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmadd_pd_128 : GCCBuiltin<"__builtin_ia32_vfmaddpd128_mask">,
-              Intrinsic<[llvm_v2f64_ty],
-                        [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
+
   def int_x86_fma_vfmsub_ss : GCCBuiltin<"__builtin_ia32_vfmsubss">,
               Intrinsic<[llvm_v4f32_ty],
                         [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty],
@@ -2174,36 +2483,6 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
               Intrinsic<[llvm_v4f64_ty],
                         [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty],
                         [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsub_ps_512 : GCCBuiltin<"__builtin_ia32_vfmsubps512_mask">,
-              Intrinsic<[llvm_v16f32_ty],
-                        [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,
-                         llvm_i16_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsub_ps_256 : GCCBuiltin<"__builtin_ia32_vfmsubps256_mask">,
-              Intrinsic<[llvm_v8f32_ty],
-                        [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsub_ps_128 : GCCBuiltin<"__builtin_ia32_vfmsubps128_mask">,
-              Intrinsic<[llvm_v4f32_ty],
-                        [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsub_pd_512 : GCCBuiltin<"__builtin_ia32_vfmsubpd512_mask">,
-              Intrinsic<[llvm_v8f64_ty],
-                        [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,
-                         llvm_i8_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsub_pd_256 : GCCBuiltin<"__builtin_ia32_vfmsubpd256_mask">,
-              Intrinsic<[llvm_v4f64_ty],
-                        [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsub_pd_128 : GCCBuiltin<"__builtin_ia32_vfmsubpd128_mask">,
-              Intrinsic<[llvm_v2f64_ty],
-                        [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
   def int_x86_fma_vfnmadd_ss : GCCBuiltin<"__builtin_ia32_vfnmaddss">,
               Intrinsic<[llvm_v4f32_ty],
                         [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty],
@@ -2228,36 +2507,6 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
               Intrinsic<[llvm_v4f64_ty],
                         [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty],
                         [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmadd_ps_512 : GCCBuiltin<"__builtin_ia32_vfnmaddps512_mask">,
-              Intrinsic<[llvm_v16f32_ty],
-                        [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,
-                         llvm_i16_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmadd_ps_256 : GCCBuiltin<"__builtin_ia32_vfnmaddps256_mask">,
-              Intrinsic<[llvm_v8f32_ty],
-                        [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmadd_ps_128 : GCCBuiltin<"__builtin_ia32_vfnmaddps128_mask">,
-              Intrinsic<[llvm_v4f32_ty],
-                        [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmadd_pd_512 : GCCBuiltin<"__builtin_ia32_vfnmaddpd512_mask">,
-              Intrinsic<[llvm_v8f64_ty],
-                        [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,
-                         llvm_i8_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmadd_pd_256 : GCCBuiltin<"__builtin_ia32_vfnmaddpd256_mask">,
-              Intrinsic<[llvm_v4f64_ty],
-                        [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmadd_pd_128 : GCCBuiltin<"__builtin_ia32_vfnmaddpd128_mask">,
-              Intrinsic<[llvm_v2f64_ty],
-                        [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
   def int_x86_fma_vfnmsub_ss : GCCBuiltin<"__builtin_ia32_vfnmsubss">,
               Intrinsic<[llvm_v4f32_ty],
                         [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty],
@@ -2282,36 +2531,6 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
               Intrinsic<[llvm_v4f64_ty],
                         [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty],
                         [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmsub_ps_512 : GCCBuiltin<"__builtin_ia32_vfnmsubps512_mask">,
-              Intrinsic<[llvm_v16f32_ty],
-                        [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,
-                         llvm_i16_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmsub_ps_256 : GCCBuiltin<"__builtin_ia32_vfnmsubps256_mask">,
-              Intrinsic<[llvm_v8f32_ty],
-                        [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmsub_ps_128 : GCCBuiltin<"__builtin_ia32_vfnmsubps128_mask">,
-              Intrinsic<[llvm_v4f32_ty],
-                        [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmsub_pd_512 : GCCBuiltin<"__builtin_ia32_vfnmsubpd512_mask">,
-              Intrinsic<[llvm_v8f64_ty],
-                        [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,
-                         llvm_i8_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmsub_pd_256 : GCCBuiltin<"__builtin_ia32_vfnmsubpd256_mask">,
-              Intrinsic<[llvm_v4f64_ty],
-                        [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfnmsub_pd_128 : GCCBuiltin<"__builtin_ia32_vfnmsubpd128_mask">,
-              Intrinsic<[llvm_v2f64_ty],
-                        [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
   def int_x86_fma_vfmaddsub_ps : GCCBuiltin<"__builtin_ia32_vfmaddsubps">,
               Intrinsic<[llvm_v4f32_ty],
                         [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty],
@@ -2330,36 +2549,6 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
               Intrinsic<[llvm_v4f64_ty],
                         [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty],
                         [IntrNoMem]>;
-  def int_x86_fma_mask_vfmaddsub_ps_512 : GCCBuiltin<"__builtin_ia32_vfmaddsubps512_mask">,
-              Intrinsic<[llvm_v16f32_ty],
-                        [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,
-                         llvm_i16_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmaddsub_ps_256 : GCCBuiltin<"__builtin_ia32_vfmaddsubps256_mask">,
-              Intrinsic<[llvm_v8f32_ty],
-                        [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmaddsub_ps_128 : GCCBuiltin<"__builtin_ia32_vfmaddsubps128_mask">,
-              Intrinsic<[llvm_v4f32_ty],
-                        [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmaddsub_pd_512 : GCCBuiltin<"__builtin_ia32_vfmaddsubpd512_mask">,
-              Intrinsic<[llvm_v8f64_ty],
-                        [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,
-                         llvm_i8_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmaddsub_pd_256 : GCCBuiltin<"__builtin_ia32_vfmaddsubpd256_mask">,
-              Intrinsic<[llvm_v4f64_ty],
-                        [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmaddsub_pd_128 : GCCBuiltin<"__builtin_ia32_vfmaddsubpd128_mask">,
-              Intrinsic<[llvm_v2f64_ty],
-                        [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
   def int_x86_fma_vfmsubadd_ps : GCCBuiltin<"__builtin_ia32_vfmsubaddps">,
               Intrinsic<[llvm_v4f32_ty],
                         [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty],
@@ -2378,36 +2567,403 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
               Intrinsic<[llvm_v4f64_ty],
                         [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty],
                         [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsubadd_ps_512 : GCCBuiltin<"__builtin_ia32_vfmsubaddps512_mask">,
-              Intrinsic<[llvm_v16f32_ty],
-                        [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,
-                         llvm_i16_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsubadd_ps_256 : GCCBuiltin<"__builtin_ia32_vfmsubaddps256_mask">,
-              Intrinsic<[llvm_v8f32_ty],
-                        [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsubadd_ps_128 : GCCBuiltin<"__builtin_ia32_vfmsubaddps128_mask">,
-              Intrinsic<[llvm_v4f32_ty],
-                        [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsubadd_pd_512 : GCCBuiltin<"__builtin_ia32_vfmsubaddpd512_mask">,
-              Intrinsic<[llvm_v8f64_ty],
-                        [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,
-                         llvm_i8_ty, llvm_i32_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsubadd_pd_256 : GCCBuiltin<"__builtin_ia32_vfmsubaddpd256_mask">,
-              Intrinsic<[llvm_v4f64_ty],
-                        [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
-  def int_x86_fma_mask_vfmsubadd_pd_128 : GCCBuiltin<"__builtin_ia32_vfmsubaddpd128_mask">,
-              Intrinsic<[llvm_v2f64_ty],
-                        [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,
-                         llvm_i8_ty],
-                        [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmadd_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddpd128_mask">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmadd_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddpd128_mask3">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmadd_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddpd128_maskz">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmadd_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddpd256_mask">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmadd_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddpd256_mask3">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmadd_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddpd256_maskz">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmadd_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddpd512_mask">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmadd_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddpd512_mask3">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmadd_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddpd512_maskz">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmadd_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddps128_mask">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmadd_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddps128_mask3">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmadd_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddps128_maskz">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmadd_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddps256_mask">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmadd_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddps256_mask3">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmadd_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddps256_maskz">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmadd_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddps512_mask">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmadd_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddps512_mask3">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmadd_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddps512_maskz">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmaddsub_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubpd128_mask">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmaddsub_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubpd128_mask3">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmaddsub_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubpd128_maskz">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmaddsub_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubpd256_mask">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmaddsub_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubpd256_mask3">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmaddsub_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubpd256_maskz">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmaddsub_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubpd512_mask">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmaddsub_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubpd512_mask3">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmaddsub_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubpd512_maskz">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmaddsub_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubps128_mask">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmaddsub_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubps128_mask3">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmaddsub_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubps128_maskz">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmaddsub_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubps256_mask">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmaddsub_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubps256_mask3">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmaddsub_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubps256_maskz">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfmaddsub_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubps512_mask">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmaddsub_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubps512_mask3">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_maskz_vfmaddsub_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfmaddsubps512_maskz">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsub_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfmsubpd128_mask3">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsub_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfmsubpd256_mask3">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsub_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfmsubpd512_mask3">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsub_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfmsubps128_mask3">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsub_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfmsubps256_mask3">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsub_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfmsubps512_mask3">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsubadd_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfmsubaddpd128_mask3">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsubadd_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfmsubaddpd256_mask3">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsubadd_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfmsubaddpd512_mask3">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsubadd_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfmsubaddps128_mask3">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsubadd_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfmsubaddps256_mask3">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfmsubadd_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfmsubaddps512_mask3">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmadd_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfnmaddpd128_mask">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmadd_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfnmaddpd256_mask">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmadd_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfnmaddpd512_mask">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmadd_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfnmaddps128_mask">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmadd_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfnmaddps256_mask">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmadd_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfnmaddps512_mask">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmsub_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubpd128_mask">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfnmsub_pd_128 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubpd128_mask3">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmsub_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubpd256_mask">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfnmsub_pd_256 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubpd256_mask3">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_v4f64_ty, llvm_v4f64_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmsub_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubpd512_mask">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfnmsub_pd_512 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubpd512_mask3">,
+          Intrinsic<[llvm_v8f64_ty],
+          [llvm_v8f64_ty, llvm_v8f64_ty, llvm_v8f64_ty,  llvm_i8_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmsub_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubps128_mask">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfnmsub_ps_128 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubps128_mask3">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_v4f32_ty, llvm_v4f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmsub_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubps256_mask">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfnmsub_ps_256 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubps256_mask3">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_v8f32_ty, llvm_v8f32_ty,  llvm_i8_ty],
+          [IntrNoMem]>;
+
+  def int_x86_avx512_mask_vfnmsub_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubps512_mask">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
+  def int_x86_avx512_mask3_vfnmsub_ps_512 :
+         GCCBuiltin<"__builtin_ia32_vfnmsubps512_mask3">,
+          Intrinsic<[llvm_v16f32_ty],
+          [llvm_v16f32_ty, llvm_v16f32_ty, llvm_v16f32_ty,  llvm_i16_ty,
+          llvm_i32_ty], [IntrNoMem]>;
+
 }
 
 //===----------------------------------------------------------------------===//
@@ -2967,6 +3523,19 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
 }
 
 //===----------------------------------------------------------------------===//
+// FXSR
+let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
+  def int_x86_fxrstor : GCCBuiltin<"__builtin_ia32_fxrstor">,
+              Intrinsic<[], [llvm_ptr_ty], []>;
+  def int_x86_fxrstor64 : GCCBuiltin<"__builtin_ia32_fxrstor64">,
+              Intrinsic<[], [llvm_ptr_ty], []>;
+  def int_x86_fxsave : GCCBuiltin<"__builtin_ia32_fxsave">,
+              Intrinsic<[], [llvm_ptr_ty], []>;
+  def int_x86_fxsave64 : GCCBuiltin<"__builtin_ia32_fxsave64">,
+              Intrinsic<[], [llvm_ptr_ty], []>;
+}
+
+//===----------------------------------------------------------------------===//
 // Half float conversion
 
 let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
@@ -3501,6 +4070,26 @@ let TargetPrefix = "x86" in {  // All intrinsics start with "llvm.x86.".
           Intrinsic<[llvm_v2f64_ty], [llvm_v2f64_ty, llvm_v2f64_ty, llvm_v2f64_ty,
                                       llvm_i8_ty, llvm_i32_ty, llvm_i32_ty],
                                      [IntrNoMem]>;
+
+  def int_x86_avx512_mask_scalef_pd_128 : GCCBuiltin<"__builtin_ia32_scalefpd128_mask">,
+          Intrinsic<[llvm_v2f64_ty], [llvm_v2f64_ty, llvm_v2f64_ty, 
+                    llvm_v2f64_ty, llvm_i8_ty], [IntrNoMem]>;
+  def int_x86_avx512_mask_scalef_pd_256 : GCCBuiltin<"__builtin_ia32_scalefpd256_mask">,
+          Intrinsic<[llvm_v4f64_ty], [llvm_v4f64_ty, llvm_v4f64_ty, 
+                    llvm_v4f64_ty, llvm_i8_ty],[IntrNoMem]>;
+  def int_x86_avx512_mask_scalef_pd_512 : GCCBuiltin<"__builtin_ia32_scalefpd512_mask">,
+          Intrinsic<[llvm_v8f64_ty], [llvm_v8f64_ty, llvm_v8f64_ty, 
+                    llvm_v8f64_ty, llvm_i8_ty, llvm_i32_ty], [IntrNoMem]>;
+  def int_x86_avx512_mask_scalef_ps_128 : GCCBuiltin<"__builtin_ia32_scalefps128_mask">,
+          Intrinsic<[llvm_v4f32_ty], [llvm_v4f32_ty, llvm_v4f32_ty, 
+                    llvm_v4f32_ty, llvm_i8_ty], [IntrNoMem]>;
+  def int_x86_avx512_mask_scalef_ps_256 : GCCBuiltin<"__builtin_ia32_scalefps256_mask">,
+          Intrinsic<[llvm_v8f32_ty], [llvm_v8f32_ty, llvm_v8f32_ty, 
+                    llvm_v8f32_ty, llvm_i8_ty], [IntrNoMem]>;
+  def int_x86_avx512_mask_scalef_ps_512 : GCCBuiltin<"__builtin_ia32_scalefps512_mask">,
+          Intrinsic<[llvm_v16f32_ty], [llvm_v16f32_ty, llvm_v16f32_ty, 
+                    llvm_v16f32_ty, llvm_i16_ty, llvm_i32_ty], [IntrNoMem]>;
+
   def int_x86_avx512_sqrt_ss        : GCCBuiltin<"__builtin_ia32_sqrtrndss">,
               Intrinsic<[llvm_v4f32_ty], [llvm_v4f32_ty, llvm_v4f32_ty],
                         [IntrNoMem]>;
@@ -3934,6 +4523,102 @@ let TargetPrefix = "x86" in {
                      llvm_v8i64_ty, llvm_i8_ty, llvm_i32_ty],
                     [IntrReadArgMem]>;
 
+  def int_x86_avx512_gather3div2_df : 
+        GCCBuiltin<"__builtin_ia32_gather3div2df">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_ptr_ty, llvm_v2i64_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3div2_di : 
+        GCCBuiltin<"__builtin_ia32_gather3div2di">,
+          Intrinsic<[llvm_v4i32_ty],
+          [llvm_v2i64_ty, llvm_ptr_ty, llvm_v2i64_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3div4_df : 
+        GCCBuiltin<"__builtin_ia32_gather3div4df">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_ptr_ty, llvm_v4i64_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3div4_di : 
+        GCCBuiltin<"__builtin_ia32_gather3div4di">,
+          Intrinsic<[llvm_v8i32_ty],
+          [llvm_v4i64_ty, llvm_ptr_ty, llvm_v4i64_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3div4_sf : 
+        GCCBuiltin<"__builtin_ia32_gather3div4sf">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_ptr_ty, llvm_v2i64_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3div4_si : 
+        GCCBuiltin<"__builtin_ia32_gather3div4si">,
+          Intrinsic<[llvm_v4i32_ty],
+          [llvm_v4i32_ty, llvm_ptr_ty, llvm_v2i64_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3div8_sf : 
+        GCCBuiltin<"__builtin_ia32_gather3div8sf">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_ptr_ty, llvm_v4i64_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3div8_si : 
+        GCCBuiltin<"__builtin_ia32_gather3div8si">,
+          Intrinsic<[llvm_v4i32_ty],
+          [llvm_v4i32_ty, llvm_ptr_ty, llvm_v4i64_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3siv2_df : 
+        GCCBuiltin<"__builtin_ia32_gather3siv2df">,
+          Intrinsic<[llvm_v2f64_ty],
+          [llvm_v2f64_ty, llvm_ptr_ty, llvm_v4i32_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3siv2_di : 
+        GCCBuiltin<"__builtin_ia32_gather3siv2di">,
+          Intrinsic<[llvm_v4i32_ty],
+          [llvm_v2i64_ty, llvm_ptr_ty, llvm_v4i32_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3siv4_df : 
+        GCCBuiltin<"__builtin_ia32_gather3siv4df">,
+          Intrinsic<[llvm_v4f64_ty],
+          [llvm_v4f64_ty, llvm_ptr_ty, llvm_v4i32_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3siv4_di : 
+        GCCBuiltin<"__builtin_ia32_gather3siv4di">,
+          Intrinsic<[llvm_v8i32_ty],
+          [llvm_v4i64_ty, llvm_ptr_ty, llvm_v4i32_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3siv4_sf : 
+        GCCBuiltin<"__builtin_ia32_gather3siv4sf">,
+          Intrinsic<[llvm_v4f32_ty],
+          [llvm_v4f32_ty, llvm_ptr_ty, llvm_v4i32_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3siv4_si : 
+        GCCBuiltin<"__builtin_ia32_gather3siv4si">,
+          Intrinsic<[llvm_v4i32_ty],
+          [llvm_v4i32_ty, llvm_ptr_ty, llvm_v4i32_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3siv8_sf : 
+        GCCBuiltin<"__builtin_ia32_gather3siv8sf">,
+          Intrinsic<[llvm_v8f32_ty],
+          [llvm_v8f32_ty, llvm_ptr_ty, llvm_v8i32_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
+  def int_x86_avx512_gather3siv8_si : 
+        GCCBuiltin<"__builtin_ia32_gather3siv8si">,
+          Intrinsic<[llvm_v8i32_ty],
+          [llvm_v8i32_ty, llvm_ptr_ty, llvm_v8i32_ty, llvm_i8_ty, llvm_i32_ty],
+          [IntrReadArgMem]>;
+
 // scatter
   def int_x86_avx512_scatter_dpd_512  : GCCBuiltin<"__builtin_ia32_scattersiv8df">,
           Intrinsic<[], [llvm_ptr_ty, llvm_i8_ty,
@@ -3970,6 +4655,102 @@ let TargetPrefix = "x86" in {
                          llvm_i32_ty],
                     [IntrReadWriteArgMem]>;
 
+  def int_x86_avx512_scatterdiv2_df : 
+       GCCBuiltin<"__builtin_ia32_scatterdiv2df">,
+        Intrinsic<[],
+        [llvm_ptr_ty, llvm_i8_ty, llvm_v2i64_ty, llvm_v2f64_ty, llvm_i32_ty],
+        [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scatterdiv2_di : 
+        GCCBuiltin<"__builtin_ia32_scatterdiv2di">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v2i64_ty, llvm_v2i64_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scatterdiv4_df : 
+        GCCBuiltin<"__builtin_ia32_scatterdiv4df">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i64_ty, llvm_v4f64_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scatterdiv4_di : 
+        GCCBuiltin<"__builtin_ia32_scatterdiv4di">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i64_ty, llvm_v4i64_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scatterdiv4_sf : 
+        GCCBuiltin<"__builtin_ia32_scatterdiv4sf">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v2i64_ty, llvm_v4f32_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scatterdiv4_si : 
+        GCCBuiltin<"__builtin_ia32_scatterdiv4si">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v2i64_ty, llvm_v4i32_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scatterdiv8_sf : 
+        GCCBuiltin<"__builtin_ia32_scatterdiv8sf">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i64_ty, llvm_v4f32_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scatterdiv8_si : 
+        GCCBuiltin<"__builtin_ia32_scatterdiv8si">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i64_ty, llvm_v4i32_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scattersiv2_df : 
+        GCCBuiltin<"__builtin_ia32_scattersiv2df">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i32_ty, llvm_v2f64_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scattersiv2_di : 
+        GCCBuiltin<"__builtin_ia32_scattersiv2di">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i32_ty, llvm_v2i64_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scattersiv4_df : 
+        GCCBuiltin<"__builtin_ia32_scattersiv4df">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i32_ty, llvm_v4f64_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scattersiv4_di : 
+        GCCBuiltin<"__builtin_ia32_scattersiv4di">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i32_ty, llvm_v4i64_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scattersiv4_sf : 
+        GCCBuiltin<"__builtin_ia32_scattersiv4sf">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i32_ty, llvm_v4f32_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scattersiv4_si : 
+        GCCBuiltin<"__builtin_ia32_scattersiv4si">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v4i32_ty, llvm_v4i32_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scattersiv8_sf : 
+        GCCBuiltin<"__builtin_ia32_scattersiv8sf">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v8i32_ty, llvm_v8f32_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
+  def int_x86_avx512_scattersiv8_si : 
+        GCCBuiltin<"__builtin_ia32_scattersiv8si">,
+          Intrinsic<[],
+          [llvm_ptr_ty, llvm_i8_ty, llvm_v8i32_ty, llvm_v8i32_ty, llvm_i32_ty],
+          [IntrReadWriteArgMem]>;
+
   // gather prefetch
   def int_x86_avx512_gatherpf_dpd_512  : GCCBuiltin<"__builtin_ia32_gatherpfdpd">,
           Intrinsic<[], [llvm_i8_ty, llvm_v8i32_ty, llvm_ptr_ty,
diff --git a/include/llvm/IR/LLVMContext.h b/include/llvm/IR/LLVMContext.h
index 53c8b3a3fdeb..e6c22090ab6d 100644
--- a/include/llvm/IR/LLVMContext.h
+++ b/include/llvm/IR/LLVMContext.h
@@ -209,6 +209,6 @@ inline LLVMContextRef *wrap(const LLVMContext **Tys) {
   return reinterpret_cast<LLVMContextRef*>(const_cast<LLVMContext**>(Tys));
 }
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/LegacyPassManager.h b/include/llvm/IR/LegacyPassManager.h
index 7c678fb321f9..5257a0eed488 100644
--- a/include/llvm/IR/LegacyPassManager.h
+++ b/include/llvm/IR/LegacyPassManager.h
@@ -93,11 +93,11 @@ private:
   Module *M;
 };
 
-} // namespace legacy
+} // End legacy namespace
 
 // Create wrappers for C Binding types (see CBindingWrapping.h).
 DEFINE_STDCXX_CONVERSION_FUNCTIONS(legacy::PassManagerBase, LLVMPassManagerRef)
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/LegacyPassManagers.h b/include/llvm/IR/LegacyPassManagers.h
index e2f1ab48b725..7f7889ad5fb3 100644
--- a/include/llvm/IR/LegacyPassManagers.h
+++ b/include/llvm/IR/LegacyPassManagers.h
@@ -474,6 +474,6 @@ public:
 
 Timer *getPassTimer(Pass *);
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/LegacyPassNameParser.h b/include/llvm/IR/LegacyPassNameParser.h
index 3f98e764fbc4..39ae80d797c7 100644
--- a/include/llvm/IR/LegacyPassNameParser.h
+++ b/include/llvm/IR/LegacyPassNameParser.h
@@ -134,6 +134,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Mangler.h b/include/llvm/IR/Mangler.h
index 6bda3190db0e..b72b259097c3 100644
--- a/include/llvm/IR/Mangler.h
+++ b/include/llvm/IR/Mangler.h
@@ -25,28 +25,15 @@ template <typename T> class SmallVectorImpl;
 class Twine;
 
 class Mangler {
-public:
-  enum ManglerPrefixTy {
-    Default,               ///< Emit default string before each symbol.
-    Private,               ///< Emit "private" prefix before each symbol.
-    LinkerPrivate          ///< Emit "linker private" prefix before each symbol.
-  };
-
-private:
-  const DataLayout *DL;
-
-  /// AnonGlobalIDs - We need to give global values the same name every time
-  /// they are mangled.  This keeps track of the number we give to anonymous
-  /// ones.
-  ///
+  /// We need to give global values the same name every time they are mangled.
+  /// This keeps track of the number we give to anonymous ones.
   mutable DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs;
 
-  /// NextAnonGlobalID - This simple counter is used to unique value names.
-  ///
+  /// This simple counter is used to unique value names.
   mutable unsigned NextAnonGlobalID;
 
 public:
-  Mangler(const DataLayout *DL) : DL(DL), NextAnonGlobalID(1) {}
+  Mangler() : NextAnonGlobalID(1) {}
 
   /// Print the appropriate prefix and the specified global variable's name.
   /// If the global variable doesn't have a name, this fills in a unique name
@@ -58,12 +45,12 @@ public:
 
   /// Print the appropriate prefix and the specified name as the global variable
   /// name. GVName must not be empty.
-  void getNameWithPrefix(raw_ostream &OS, const Twine &GVName,
-                         ManglerPrefixTy PrefixTy = Mangler::Default) const;
-  void getNameWithPrefix(SmallVectorImpl<char> &OutName, const Twine &GVName,
-                         ManglerPrefixTy PrefixTy = Mangler::Default) const;
+  static void getNameWithPrefix(raw_ostream &OS, const Twine &GVName,
+                                const DataLayout &DL);
+  static void getNameWithPrefix(SmallVectorImpl<char> &OutName,
+                                const Twine &GVName, const DataLayout &DL);
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Metadata.def b/include/llvm/IR/Metadata.def
index f2abff4752f7..857e4637d1e4 100644
--- a/include/llvm/IR/Metadata.def
+++ b/include/llvm/IR/Metadata.def
@@ -82,6 +82,7 @@ HANDLE_SPECIALIZED_MDNODE_BRANCH(DILexicalBlockBase)
 HANDLE_SPECIALIZED_MDNODE_LEAF(DILexicalBlock)
 HANDLE_SPECIALIZED_MDNODE_LEAF(DILexicalBlockFile)
 HANDLE_SPECIALIZED_MDNODE_LEAF(DINamespace)
+HANDLE_SPECIALIZED_MDNODE_LEAF(DIModule)
 HANDLE_SPECIALIZED_MDNODE_BRANCH(DITemplateParameter)
 HANDLE_SPECIALIZED_MDNODE_LEAF(DITemplateTypeParameter)
 HANDLE_SPECIALIZED_MDNODE_LEAF(DITemplateValueParameter)
diff --git a/include/llvm/IR/Metadata.h b/include/llvm/IR/Metadata.h
index bf4a030cd362..c639625bf16c 100644
--- a/include/llvm/IR/Metadata.h
+++ b/include/llvm/IR/Metadata.h
@@ -27,8 +27,11 @@
 #include <type_traits>
 
 namespace llvm {
+
 class LLVMContext;
 class Module;
+class ModuleSlotTracker;
+
 template<typename ValueSubClass, typename ItemParentClass>
   class SymbolTableListTraits;
 
@@ -73,6 +76,7 @@ public:
     DILexicalBlockKind,
     DILexicalBlockFileKind,
     DINamespaceKind,
+    DIModuleKind,
     DITemplateTypeParameterKind,
     DITemplateValueParameterKind,
     DIGlobalVariableKind,
@@ -121,7 +125,11 @@ public:
   ///
   /// If \c M is provided, metadata nodes will be numbered canonically;
   /// otherwise, pointer addresses are substituted.
+  /// @{
   void print(raw_ostream &OS, const Module *M = nullptr) const;
+  void print(raw_ostream &OS, ModuleSlotTracker &MST,
+             const Module *M = nullptr) const;
+  /// @}
 
   /// \brief Print as operand.
   ///
@@ -129,7 +137,11 @@ public:
   ///
   /// If \c M is provided, metadata nodes will be numbered canonically;
   /// otherwise, pointer addresses are substituted.
+  /// @{
   void printAsOperand(raw_ostream &OS, const Module *M = nullptr) const;
+  void printAsOperand(raw_ostream &OS, ModuleSlotTracker &MST,
+                      const Module *M = nullptr) const;
+  /// @}
 };
 
 #define HANDLE_METADATA(CLASS) class CLASS;
@@ -1203,6 +1215,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Module.h b/include/llvm/IR/Module.h
index 598a58e2bd92..1668b95c8bd1 100644
--- a/include/llvm/IR/Module.h
+++ b/include/llvm/IR/Module.h
@@ -249,7 +249,7 @@ public:
 
   /// Get the data layout string for the module's target platform. This is
   /// equivalent to getDataLayout()->getStringRepresentation().
-  const std::string getDataLayoutStr() const {
+  const std::string &getDataLayoutStr() const {
     return DL.getStringRepresentation();
   }
 
@@ -694,6 +694,6 @@ inline Module *unwrap(LLVMModuleProviderRef MP) {
   return reinterpret_cast<Module*>(MP);
 }
   
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/ModuleSlotTracker.h b/include/llvm/IR/ModuleSlotTracker.h
new file mode 100644
index 000000000000..c37dcecf8e40
--- /dev/null
+++ b/include/llvm/IR/ModuleSlotTracker.h
@@ -0,0 +1,68 @@
+//===-- llvm/IR/ModuleSlotTracker.h -----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_IR_MODULESLOTTRACKER_H
+#define LLVM_IR_MODULESLOTTRACKER_H
+
+#include <memory>
+
+namespace llvm {
+
+class Module;
+class Function;
+class SlotTracker;
+
+/// Manage lifetime of a slot tracker for printing IR.
+///
+/// Wrapper around the \a SlotTracker used internally by \a AsmWriter.  This
+/// class allows callers to share the cost of incorporating the metadata in a
+/// module or a function.
+///
+/// If the IR changes from underneath \a ModuleSlotTracker, strings like
+/// "<badref>" will be printed, or, worse, the wrong slots entirely.
+class ModuleSlotTracker {
+  /// Storage for a slot tracker.
+  std::unique_ptr<SlotTracker> MachineStorage;
+
+  const Module *M = nullptr;
+  const Function *F = nullptr;
+  SlotTracker *Machine = nullptr;
+
+public:
+  /// Wrap a preinitialized SlotTracker.
+  ModuleSlotTracker(SlotTracker &Machine, const Module *M,
+                    const Function *F = nullptr);
+
+  /// Construct a slot tracker from a module.
+  ///
+  /// If \a M is \c nullptr, uses a null slot tracker.  Otherwise, initializes
+  /// a slot tracker, and initializes all metadata slots.  \c
+  /// ShouldInitializeAllMetadata defaults to true because this is expected to
+  /// be shared between multiple callers, and otherwise MDNode references will
+  /// not match up.
+  explicit ModuleSlotTracker(const Module *M,
+                             bool ShouldInitializeAllMetadata = true);
+
+  /// Destructor to clean up storage.
+  ~ModuleSlotTracker();
+
+  SlotTracker *getMachine() const { return Machine; }
+  const Module *getModule() const { return M; }
+  const Function *getCurrentFunction() const { return F; }
+
+  /// Incorporate the given function.
+  ///
+  /// Purge the currently incorporated function and incorporate \c F.  If \c F
+  /// is currently incorporated, this is a no-op.
+  void incorporateFunction(const Function &F);
+};
+
+} // end namespace llvm
+
+#endif
diff --git a/include/llvm/IR/NoFolder.h b/include/llvm/IR/NoFolder.h
index 55b6798c7b3e..61f4817a9b62 100644
--- a/include/llvm/IR/NoFolder.h
+++ b/include/llvm/IR/NoFolder.h
@@ -294,6 +294,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/OperandTraits.h b/include/llvm/IR/OperandTraits.h
index 91ec8d2db750..e97a8009ccc0 100644
--- a/include/llvm/IR/OperandTraits.h
+++ b/include/llvm/IR/OperandTraits.h
@@ -155,6 +155,6 @@ template <int Idx_nocapture> const Use &CLASS::Op() const { \
 }
 
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Operator.h b/include/llvm/IR/Operator.h
index 82f516eb8869..1b9102ecc7e4 100644
--- a/include/llvm/IR/Operator.h
+++ b/include/llvm/IR/Operator.h
@@ -491,6 +491,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/PassManager.h b/include/llvm/IR/PassManager.h
index 2ff1a6fb2fa2..4166babd63e5 100644
--- a/include/llvm/IR/PassManager.h
+++ b/include/llvm/IR/PassManager.h
@@ -890,6 +890,6 @@ struct InvalidateAllAnalysesPass {
   static StringRef name() { return "InvalidateAllAnalysesPass"; }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/PassManagerInternal.h b/include/llvm/IR/PassManagerInternal.h
index 7921b4f95369..92de10bcd75b 100644
--- a/include/llvm/IR/PassManagerInternal.h
+++ b/include/llvm/IR/PassManagerInternal.h
@@ -345,6 +345,6 @@ struct AnalysisPassModel<IRUnitT, PassT, false> : AnalysisPassConcept<IRUnitT> {
 };
 
 } // End namespace detail
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/Statepoint.h b/include/llvm/IR/Statepoint.h
index 8159cde34251..4ab1f8497adb 100644
--- a/include/llvm/IR/Statepoint.h
+++ b/include/llvm/IR/Statepoint.h
@@ -20,6 +20,7 @@
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/CallSite.h"
 #include "llvm/IR/Constants.h"
+#include "llvm/IR/Function.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/Support/Compiler.h"
@@ -39,13 +40,13 @@ class GCRelocateOperands;
 class ImmutableStatepoint;
 
 bool isStatepoint(const ImmutableCallSite &CS);
-bool isStatepoint(const Value *inst);
-bool isStatepoint(const Value &inst);
+bool isStatepoint(const Value *V);
+bool isStatepoint(const Value &V);
 
-bool isGCRelocate(const Value *inst);
+bool isGCRelocate(const Value *V);
 bool isGCRelocate(const ImmutableCallSite &CS);
 
-bool isGCResult(const Value *inst);
+bool isGCResult(const Value *V);
 bool isGCResult(const ImmutableCallSite &CS);
 
 /// Analogous to CallSiteBase, this provides most of the actual
@@ -54,20 +55,23 @@ bool isGCResult(const ImmutableCallSite &CS);
 /// concrete subtypes.  This is structured analogous to CallSite
 /// rather than the IntrinsicInst.h helpers since we want to support
 /// invokable statepoints in the near future.
-/// TODO: This does not currently allow the if(Statepoint S = ...)
-///   idiom used with CallSites.  Consider refactoring to support.
-template <typename InstructionTy, typename ValueTy, typename CallSiteTy>
+template <typename FunTy, typename InstructionTy, typename ValueTy,
+          typename CallSiteTy>
 class StatepointBase {
   CallSiteTy StatepointCS;
   void *operator new(size_t, unsigned) = delete;
   void *operator new(size_t s) = delete;
 
 protected:
-  explicit StatepointBase(InstructionTy *I) : StatepointCS(I) {
-    assert(isStatepoint(I));
+  explicit StatepointBase(InstructionTy *I) {
+    if (isStatepoint(I)) {
+      StatepointCS = CallSiteTy(I);
+      assert(StatepointCS && "isStatepoint implies CallSite");
+    }
   }
-  explicit StatepointBase(CallSiteTy CS) : StatepointCS(CS) {
-    assert(isStatepoint(CS));
+  explicit StatepointBase(CallSiteTy CS) {
+    if (isStatepoint(CS))
+      StatepointCS = CS;
   }
 
 public:
@@ -76,29 +80,37 @@ public:
   enum {
     IDPos = 0,
     NumPatchBytesPos = 1,
-    ActualCalleePos = 2,
+    CalledFunctionPos = 2,
     NumCallArgsPos = 3,
     FlagsPos = 4,
     CallArgsBeginPos = 5,
   };
 
+  explicit operator bool() const {
+    // We do not assign non-statepoint CallSites to StatepointCS.
+    return (bool)StatepointCS;
+  }
+
   /// Return the underlying CallSite.
-  CallSiteTy getCallSite() { return StatepointCS; }
+  CallSiteTy getCallSite() const {
+    assert(*this && "check validity first!");
+    return StatepointCS;
+  }
 
   uint64_t getFlags() const {
-    return cast<ConstantInt>(StatepointCS.getArgument(FlagsPos))
+    return cast<ConstantInt>(getCallSite().getArgument(FlagsPos))
         ->getZExtValue();
   }
 
   /// Return the ID associated with this statepoint.
-  uint64_t getID() {
-    const Value *IDVal = StatepointCS.getArgument(IDPos);
+  uint64_t getID() const {
+    const Value *IDVal = getCallSite().getArgument(IDPos);
     return cast<ConstantInt>(IDVal)->getZExtValue();
   }
 
   /// Return the number of patchable bytes associated with this statepoint.
-  uint32_t getNumPatchBytes() {
-    const Value *NumPatchBytesVal = StatepointCS.getArgument(NumPatchBytesPos);
+  uint32_t getNumPatchBytes() const {
+    const Value *NumPatchBytesVal = getCallSite().getArgument(NumPatchBytesPos);
     uint64_t NumPatchBytes =
       cast<ConstantInt>(NumPatchBytesVal)->getZExtValue();
     assert(isInt<32>(NumPatchBytes) && "should fit in 32 bits!");
@@ -106,91 +118,125 @@ public:
   }
 
   /// Return the value actually being called or invoked.
-  ValueTy *getActualCallee() {
-    return StatepointCS.getArgument(ActualCalleePos);
+  ValueTy *getCalledValue() const {
+    return getCallSite().getArgument(CalledFunctionPos);
+  }
+
+  InstructionTy *getInstruction() const {
+    return getCallSite().getInstruction();
+  }
+
+  /// Return the function being called if this is a direct call, otherwise
+  /// return null (if it's an indirect call).
+  FunTy *getCalledFunction() const {
+    return dyn_cast<Function>(getCalledValue());
+  }
+
+  /// Return the caller function for this statepoint.
+  FunTy *getCaller() const { return getCallSite().getCaller(); }
+
+  /// Determine if the statepoint cannot unwind.
+  bool doesNotThrow() const {
+    Function *F = getCalledFunction();
+    return getCallSite().doesNotThrow() || (F ? F->doesNotThrow() : false);
   }
 
   /// Return the type of the value returned by the call underlying the
   /// statepoint.
-  Type *getActualReturnType() {
+  Type *getActualReturnType() const {
     auto *FTy = cast<FunctionType>(
-        cast<PointerType>(getActualCallee()->getType())->getElementType());
+        cast<PointerType>(getCalledValue()->getType())->getElementType());
     return FTy->getReturnType();
   }
 
   /// Number of arguments to be passed to the actual callee.
-  int getNumCallArgs() {
-    const Value *NumCallArgsVal = StatepointCS.getArgument(NumCallArgsPos);
+  int getNumCallArgs() const {
+    const Value *NumCallArgsVal = getCallSite().getArgument(NumCallArgsPos);
     return cast<ConstantInt>(NumCallArgsVal)->getZExtValue();
   }
 
-  typename CallSiteTy::arg_iterator call_args_begin() {
-    assert(CallArgsBeginPos <= (int)StatepointCS.arg_size());
-    return StatepointCS.arg_begin() + CallArgsBeginPos;
+  size_t arg_size() const { return getNumCallArgs(); }
+  typename CallSiteTy::arg_iterator arg_begin() const {
+    assert(CallArgsBeginPos <= (int)getCallSite().arg_size());
+    return getCallSite().arg_begin() + CallArgsBeginPos;
   }
-  typename CallSiteTy::arg_iterator call_args_end() {
-    auto I = call_args_begin() + getNumCallArgs();
-    assert((StatepointCS.arg_end() - I) >= 0);
+  typename CallSiteTy::arg_iterator arg_end() const {
+    auto I = arg_begin() + arg_size();
+    assert((getCallSite().arg_end() - I) >= 0);
     return I;
   }
 
+  ValueTy *getArgument(unsigned Index) {
+    assert(Index < arg_size() && "out of bounds!");
+    return *(arg_begin() + Index);
+  }
+
   /// range adapter for call arguments
-  iterator_range<arg_iterator> call_args() {
-    return iterator_range<arg_iterator>(call_args_begin(), call_args_end());
+  iterator_range<arg_iterator> call_args() const {
+    return iterator_range<arg_iterator>(arg_begin(), arg_end());
+  }
+
+  /// \brief Return true if the call or the callee has the given attribute.
+  bool paramHasAttr(unsigned i, Attribute::AttrKind A) const {
+    Function *F = getCalledFunction();
+    return getCallSite().paramHasAttr(i + CallArgsBeginPos, A) ||
+          (F ? F->getAttributes().hasAttribute(i, A) : false);
   }
 
   /// Number of GC transition args.
-  int getNumTotalGCTransitionArgs() {
-    const Value *NumGCTransitionArgs = *call_args_end();
+  int getNumTotalGCTransitionArgs() const {
+    const Value *NumGCTransitionArgs = *arg_end();
     return cast<ConstantInt>(NumGCTransitionArgs)->getZExtValue();
   }
-  typename CallSiteTy::arg_iterator gc_transition_args_begin() {
-    auto I = call_args_end() + 1;
-    assert((StatepointCS.arg_end() - I) >= 0);
+  typename CallSiteTy::arg_iterator gc_transition_args_begin() const {
+    auto I = arg_end() + 1;
+    assert((getCallSite().arg_end() - I) >= 0);
     return I;
   }
-  typename CallSiteTy::arg_iterator gc_transition_args_end() {
+  typename CallSiteTy::arg_iterator gc_transition_args_end() const {
     auto I = gc_transition_args_begin() + getNumTotalGCTransitionArgs();
-    assert((StatepointCS.arg_end() - I) >= 0);
+    assert((getCallSite().arg_end() - I) >= 0);
     return I;
   }
 
   /// range adapter for GC transition arguments
-  iterator_range<arg_iterator> gc_transition_args() {
+  iterator_range<arg_iterator> gc_transition_args() const {
     return iterator_range<arg_iterator>(gc_transition_args_begin(),
                                         gc_transition_args_end());
   }
 
   /// Number of additional arguments excluding those intended
   /// for garbage collection.
-  int getNumTotalVMSArgs() {
+  int getNumTotalVMSArgs() const {
     const Value *NumVMSArgs = *gc_transition_args_end();
     return cast<ConstantInt>(NumVMSArgs)->getZExtValue();
   }
 
-  typename CallSiteTy::arg_iterator vm_state_begin() {
+  typename CallSiteTy::arg_iterator vm_state_begin() const {
     auto I = gc_transition_args_end() + 1;
-    assert((StatepointCS.arg_end() - I) >= 0);
+    assert((getCallSite().arg_end() - I) >= 0);
     return I;
   }
-  typename CallSiteTy::arg_iterator vm_state_end() {
+  typename CallSiteTy::arg_iterator vm_state_end() const {
     auto I = vm_state_begin() + getNumTotalVMSArgs();
-    assert((StatepointCS.arg_end() - I) >= 0);
+    assert((getCallSite().arg_end() - I) >= 0);
     return I;
   }
 
   /// range adapter for vm state arguments
-  iterator_range<arg_iterator> vm_state_args() {
+  iterator_range<arg_iterator> vm_state_args() const {
     return iterator_range<arg_iterator>(vm_state_begin(), vm_state_end());
   }
 
-  typename CallSiteTy::arg_iterator gc_args_begin() { return vm_state_end(); }
-  typename CallSiteTy::arg_iterator gc_args_end() {
-    return StatepointCS.arg_end();
+  typename CallSiteTy::arg_iterator gc_args_begin() const {
+    return vm_state_end();
+  }
+  typename CallSiteTy::arg_iterator gc_args_end() const {
+    return getCallSite().arg_end();
   }
 
   /// range adapter for gc arguments
-  iterator_range<arg_iterator> gc_args() {
+  iterator_range<arg_iterator> gc_args() const {
     return iterator_range<arg_iterator>(gc_args_begin(), gc_args_end());
   }
 
@@ -198,7 +244,18 @@ public:
   /// May contain several relocations for the same base/derived pair.
   /// For example this could happen due to relocations on unwinding
   /// path of invoke.
-  std::vector<GCRelocateOperands> getRelocates();
+  std::vector<GCRelocateOperands> getRelocates() const;
+
+  /// Get the experimental_gc_result call tied to this statepoint.  Can be
+  /// nullptr if there isn't a gc_result tied to this statepoint.  Guaranteed to
+  /// be a CallInst if non-null.
+  InstructionTy *getGCResult() const {
+    for (auto *U : getInstruction()->users())
+      if (isGCResult(U))
+        return cast<CallInst>(U);
+
+    return nullptr;
+  }
 
 #ifndef NDEBUG
   /// Asserts if this statepoint is malformed.  Common cases for failure
@@ -209,8 +266,8 @@ public:
            "number of arguments to actually callee can't be negative");
 
     // The internal asserts in the iterator accessors do the rest.
-    (void)call_args_begin();
-    (void)call_args_end();
+    (void)arg_begin();
+    (void)arg_end();
     (void)gc_transition_args_begin();
     (void)gc_transition_args_end();
     (void)vm_state_begin();
@@ -224,9 +281,10 @@ public:
 /// A specialization of it's base class for read only access
 /// to a gc.statepoint.
 class ImmutableStatepoint
-    : public StatepointBase<const Instruction, const Value, ImmutableCallSite> {
-  typedef StatepointBase<const Instruction, const Value, ImmutableCallSite>
-      Base;
+    : public StatepointBase<const Function, const Instruction, const Value,
+                            ImmutableCallSite> {
+  typedef StatepointBase<const Function, const Instruction, const Value,
+                         ImmutableCallSite> Base;
 
 public:
   explicit ImmutableStatepoint(const Instruction *I) : Base(I) {}
@@ -235,8 +293,9 @@ public:
 
 /// A specialization of it's base class for read-write access
 /// to a gc.statepoint.
-class Statepoint : public StatepointBase<Instruction, Value, CallSite> {
-  typedef StatepointBase<Instruction, Value, CallSite> Base;
+class Statepoint
+    : public StatepointBase<Function, Instruction, Value, CallSite> {
+  typedef StatepointBase<Function, Instruction, Value, CallSite> Base;
 
 public:
   explicit Statepoint(Instruction *I) : Base(I) {}
@@ -313,9 +372,11 @@ public:
   }
 };
 
-template <typename InstructionTy, typename ValueTy, typename CallSiteTy>
+template <typename FunTy, typename InstructionTy, typename ValueTy,
+          typename CallSiteTy>
 std::vector<GCRelocateOperands>
-StatepointBase<InstructionTy, ValueTy, CallSiteTy>::getRelocates() {
+StatepointBase<FunTy, InstructionTy, ValueTy, CallSiteTy>::getRelocates()
+    const {
 
   std::vector<GCRelocateOperands> Result;
 
@@ -324,7 +385,7 @@ StatepointBase<InstructionTy, ValueTy, CallSiteTy>::getRelocates() {
   // Search for relocated pointers.  Note that working backwards from the
   // gc_relocates ensures that we only get pairs which are actually relocated
   // and used after the statepoint.
-  for (const User *U : StatepointCS.getInstruction()->users())
+  for (const User *U : getInstruction()->users())
     if (isGCRelocate(U))
       Result.push_back(GCRelocateOperands(U));
 
@@ -333,7 +394,7 @@ StatepointBase<InstructionTy, ValueTy, CallSiteTy>::getRelocates() {
 
   // We need to scan thorough exceptional relocations if it is invoke statepoint
   LandingPadInst *LandingPad =
-      cast<InvokeInst>(StatepointCS.getInstruction())->getLandingPadInst();
+      cast<InvokeInst>(getInstruction())->getLandingPadInst();
 
   // Search for extract value from landingpad instruction to which
   // gc relocates will be attached
@@ -348,6 +409,6 @@ StatepointBase<InstructionTy, ValueTy, CallSiteTy>::getRelocates() {
   }
   return Result;
 }
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/SymbolTableListTraits.h b/include/llvm/IR/SymbolTableListTraits.h
index ef69498123fb..0a5149c3d938 100644
--- a/include/llvm/IR/SymbolTableListTraits.h
+++ b/include/llvm/IR/SymbolTableListTraits.h
@@ -73,6 +73,6 @@ public:
   static ValueSymbolTable *toPtr(ValueSymbolTable &R) { return &R; }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Type.h b/include/llvm/IR/Type.h
index a62604625bd8..6ab0bd0631a0 100644
--- a/include/llvm/IR/Type.h
+++ b/include/llvm/IR/Type.h
@@ -484,6 +484,6 @@ inline LLVMTypeRef *wrap(Type **Tys) {
   return reinterpret_cast<LLVMTypeRef*>(const_cast<Type**>(Tys));
 }
   
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/TypeFinder.h b/include/llvm/IR/TypeFinder.h
index aa50d0e411da..73a63ad0349e 100644
--- a/include/llvm/IR/TypeFinder.h
+++ b/include/llvm/IR/TypeFinder.h
@@ -74,6 +74,6 @@ private:
   void incorporateMDNode(const MDNode *V);
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Use.h b/include/llvm/IR/Use.h
index 8f87df67057b..160d71b03e7f 100644
--- a/include/llvm/IR/Use.h
+++ b/include/llvm/IR/Use.h
@@ -168,6 +168,6 @@ template <> struct simplify_type<const Use> {
 // Create wrappers for C Binding types (see CBindingWrapping.h).
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(Use, LLVMUseRef)
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/IR/User.h b/include/llvm/IR/User.h
index 41d57703ab01..93614fab5759 100644
--- a/include/llvm/IR/User.h
+++ b/include/llvm/IR/User.h
@@ -259,6 +259,6 @@ template<> struct simplify_type<User::const_op_iterator> {
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Value.def b/include/llvm/IR/Value.def
new file mode 100644
index 000000000000..c2a0639603ed
--- /dev/null
+++ b/include/llvm/IR/Value.def
@@ -0,0 +1,90 @@
+//===-------- llvm/IR/Value.def - File that describes Values ---v-*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains descriptions of the various LLVM values.  This is
+// used as a central place for enumerating the different values.
+//
+//===----------------------------------------------------------------------===//
+
+// NOTE: NO INCLUDE GUARD DESIRED!
+
+// Provide definitions of macros so that users of this file do not have to
+// define everything to use it...
+//
+#if !(defined HANDLE_GLOBAL_VALUE || defined HANDLE_CONSTANT ||                \
+      defined HANDLE_INSTRUCTION || defined HANDLE_INLINE_ASM_VALUE ||         \
+      defined HANDLE_METADATA_VALUE || defined HANDLE_VALUE ||                 \
+      defined HANDLE_CONSTANT_MARKER)
+#error "Missing macro definition of HANDLE_VALUE*"
+#endif
+
+#ifndef HANDLE_GLOBAL_VALUE
+#define HANDLE_GLOBAL_VALUE(ValueName) HANDLE_CONSTANT(ValueName)
+#endif
+
+#ifndef HANDLE_CONSTANT
+#define HANDLE_CONSTANT(ValueName) HANDLE_VALUE(ValueName)
+#endif
+
+#ifndef HANDLE_INSTRUCTION
+#define HANDLE_INSTRUCTION(ValueName) HANDLE_VALUE(ValueName)
+#endif
+
+#ifndef HANDLE_INLINE_ASM_VALUE
+#define HANDLE_INLINE_ASM_VALUE(ValueName) HANDLE_VALUE(ValueName)
+#endif
+
+#ifndef HANDLE_METADATA_VALUE
+#define HANDLE_METADATA_VALUE(ValueName) HANDLE_VALUE(ValueName)
+#endif
+
+#ifndef HANDLE_VALUE
+#define HANDLE_VALUE(ValueName)
+#endif
+
+#ifndef HANDLE_CONSTANT_MARKER
+#define HANDLE_CONSTANT_MARKER(MarkerName, ValueName)
+#endif
+
+HANDLE_VALUE(Argument)
+HANDLE_VALUE(BasicBlock)
+
+HANDLE_GLOBAL_VALUE(Function)
+HANDLE_GLOBAL_VALUE(GlobalAlias)
+HANDLE_GLOBAL_VALUE(GlobalVariable)
+HANDLE_CONSTANT(UndefValue)
+HANDLE_CONSTANT(BlockAddress)
+HANDLE_CONSTANT(ConstantExpr)
+HANDLE_CONSTANT(ConstantAggregateZero)
+HANDLE_CONSTANT(ConstantDataArray)
+HANDLE_CONSTANT(ConstantDataVector)
+HANDLE_CONSTANT(ConstantInt)
+HANDLE_CONSTANT(ConstantFP)
+HANDLE_CONSTANT(ConstantArray)
+HANDLE_CONSTANT(ConstantStruct)
+HANDLE_CONSTANT(ConstantVector)
+HANDLE_CONSTANT(ConstantPointerNull)
+
+HANDLE_METADATA_VALUE(MetadataAsValue)
+HANDLE_INLINE_ASM_VALUE(InlineAsm)
+
+HANDLE_INSTRUCTION(Instruction)
+// Enum values starting at InstructionVal are used for Instructions;
+// don't add new values here!
+
+HANDLE_CONSTANT_MARKER(ConstantFirstVal, Function)
+HANDLE_CONSTANT_MARKER(ConstantLastVal, ConstantPointerNull)
+
+#undef HANDLE_GLOBAL_VALUE
+#undef HANDLE_CONSTANT
+#undef HANDLE_INSTRUCTION
+#undef HANDLE_METADATA_VALUE
+#undef HANDLE_INLINE_ASM_VALUE
+#undef HANDLE_VALUE
+#undef HANDLE_CONSTANT_MARKER
diff --git a/include/llvm/IR/Value.h b/include/llvm/IR/Value.h
index 6b36ba6debfb..484afc6d232c 100644
--- a/include/llvm/IR/Value.h
+++ b/include/llvm/IR/Value.h
@@ -38,6 +38,7 @@ class InlineAsm;
 class Instruction;
 class LLVMContext;
 class Module;
+class ModuleSlotTracker;
 class StringRef;
 class Twine;
 class Type;
@@ -199,7 +200,10 @@ public:
   void dump() const;
 
   /// \brief Implement operator<< on Value.
+  /// @{
   void print(raw_ostream &O) const;
+  void print(raw_ostream &O, ModuleSlotTracker &MST) const;
+  /// @}
 
   /// \brief Print the name of this Value out to the specified raw_ostream.
   ///
@@ -207,8 +211,12 @@ public:
   /// instruction that generated it. If you specify a Module for context, then
   /// even constanst get pretty-printed; for example, the type of a null
   /// pointer is printed symbolically.
+  /// @{
   void printAsOperand(raw_ostream &O, bool PrintType = true,
                       const Module *M = nullptr) const;
+  void printAsOperand(raw_ostream &O, bool PrintType,
+                      ModuleSlotTracker &MST) const;
+  /// @}
 
   /// \brief All values are typed, get the type of this value.
   Type *getType() const { return VTy; }
@@ -333,32 +341,12 @@ public:
   /// Value classes SubclassID field. They are used for concrete type
   /// identification.
   enum ValueTy {
-    ArgumentVal,              // This is an instance of Argument
-    BasicBlockVal,            // This is an instance of BasicBlock
-    FunctionVal,              // This is an instance of Function
-    GlobalAliasVal,           // This is an instance of GlobalAlias
-    GlobalVariableVal,        // This is an instance of GlobalVariable
-    UndefValueVal,            // This is an instance of UndefValue
-    BlockAddressVal,          // This is an instance of BlockAddress
-    ConstantExprVal,          // This is an instance of ConstantExpr
-    ConstantAggregateZeroVal, // This is an instance of ConstantAggregateZero
-    ConstantDataArrayVal,     // This is an instance of ConstantDataArray
-    ConstantDataVectorVal,    // This is an instance of ConstantDataVector
-    ConstantIntVal,           // This is an instance of ConstantInt
-    ConstantFPVal,            // This is an instance of ConstantFP
-    ConstantArrayVal,         // This is an instance of ConstantArray
-    ConstantStructVal,        // This is an instance of ConstantStruct
-    ConstantVectorVal,        // This is an instance of ConstantVector
-    ConstantPointerNullVal,   // This is an instance of ConstantPointerNull
-    MetadataAsValueVal,       // This is an instance of MetadataAsValue
-    InlineAsmVal,             // This is an instance of InlineAsm
-    InstructionVal,           // This is an instance of Instruction
-    // Enum values starting at InstructionVal are used for Instructions;
-    // don't add new values here!
+#define HANDLE_VALUE(Name) Name##Val,
+#include "llvm/IR/Value.def"
 
     // Markers:
-    ConstantFirstVal = FunctionVal,
-    ConstantLastVal  = ConstantPointerNullVal
+#define HANDLE_CONSTANT_MARKER(Marker, Constant) Marker = Constant##Val,
+#include "llvm/IR/Value.def"
   };
 
   /// \brief Return an ID for the concrete type of this object.
@@ -716,6 +704,6 @@ inline LLVMValueRef *wrap(const Value **Vals) {
   return reinterpret_cast<LLVMValueRef*>(const_cast<Value**>(Vals));
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/ValueHandle.h b/include/llvm/IR/ValueHandle.h
index e92aed35c5ac..53fa80a626aa 100644
--- a/include/llvm/IR/ValueHandle.h
+++ b/include/llvm/IR/ValueHandle.h
@@ -159,11 +159,13 @@ public:
 
 // Specialize simplify_type to allow WeakVH to participate in
 // dyn_cast, isa, etc.
-template<> struct simplify_type<WeakVH> {
-  typedef Value* SimpleType;
-  static SimpleType getSimplifiedValue(WeakVH &WVH) {
-    return WVH;
-  }
+template <> struct simplify_type<WeakVH> {
+  typedef Value *SimpleType;
+  static SimpleType getSimplifiedValue(WeakVH &WVH) { return WVH; }
+};
+template <> struct simplify_type<const WeakVH> {
+  typedef Value *SimpleType;
+  static SimpleType getSimplifiedValue(const WeakVH &WVH) { return WVH; }
 };
 
 /// \brief Value handle that asserts if the Value is deleted.
@@ -380,6 +382,6 @@ public:
   virtual void allUsesReplacedWith(Value *) {}
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/ValueSymbolTable.h b/include/llvm/IR/ValueSymbolTable.h
index 8219f5099690..bf1fade1ccef 100644
--- a/include/llvm/IR/ValueSymbolTable.h
+++ b/include/llvm/IR/ValueSymbolTable.h
@@ -128,6 +128,6 @@ private:
 /// @}
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IR/Verifier.h b/include/llvm/IR/Verifier.h
index 7da4d97488ad..89039d24195e 100644
--- a/include/llvm/IR/Verifier.h
+++ b/include/llvm/IR/Verifier.h
@@ -72,6 +72,6 @@ public:
   static StringRef name() { return "VerifierPass"; }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/IRReader/IRReader.h b/include/llvm/IRReader/IRReader.h
index bdaea6d6c0cf..2d9ace0b62a0 100644
--- a/include/llvm/IRReader/IRReader.h
+++ b/include/llvm/IRReader/IRReader.h
@@ -43,6 +43,6 @@ std::unique_ptr<Module> parseIR(MemoryBufferRef Buffer, SMDiagnostic &Err,
 /// for it.
 std::unique_ptr<Module> parseIRFile(StringRef Filename, SMDiagnostic &Err,
                                     LLVMContext &Context);
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/InitializePasses.h b/include/llvm/InitializePasses.h
index 33ffadb6848c..74fbc0f94b03 100644
--- a/include/llvm/InitializePasses.h
+++ b/include/llvm/InitializePasses.h
@@ -302,6 +302,6 @@ void initializePlaceSafepointsPass(PassRegistry&);
 void initializeDwarfEHPreparePass(PassRegistry&);
 void initializeFloat2IntPass(PassRegistry&);
 void initializeLoopDistributePass(PassRegistry&);
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/LTO/LTOCodeGenerator.h b/include/llvm/LTO/LTOCodeGenerator.h
index c079f791c24f..0c46fc048a43 100644
--- a/include/llvm/LTO/LTOCodeGenerator.h
+++ b/include/llvm/LTO/LTOCodeGenerator.h
@@ -177,5 +177,5 @@ private:
   bool ShouldInternalize = true;
   bool ShouldEmbedUselists = false;
 };
-} // namespace llvm
+}
 #endif
diff --git a/include/llvm/LTO/LTOModule.h b/include/llvm/LTO/LTOModule.h
index c2eb36220e84..c4e2be627399 100644
--- a/include/llvm/LTO/LTOModule.h
+++ b/include/llvm/LTO/LTOModule.h
@@ -47,12 +47,11 @@ private:
 
   std::unique_ptr<LLVMContext> OwnedContext;
 
+  std::string LinkerOpts;
+
   std::unique_ptr<object::IRObjectFile> IRFile;
   std::unique_ptr<TargetMachine> _target;
-  StringSet<>                             _linkeropt_strings;
-  std::vector<const char *>               _deplibs;
-  std::vector<const char *>               _linkeropts;
-  std::vector<NameAndAttributes>          _symbols;
+  std::vector<NameAndAttributes> _symbols;
 
   // _defines and _undefines only needed to disambiguate tentative definitions
   StringSet<>                             _defines;
@@ -149,28 +148,8 @@ public:
     return nullptr;
   }
 
-  /// Get the number of dependent libraries
-  uint32_t getDependentLibraryCount() {
-    return _deplibs.size();
-  }
-
-  /// Get the dependent library at the specified index.
-  const char *getDependentLibrary(uint32_t index) {
-    if (index < _deplibs.size())
-      return _deplibs[index];
-    return nullptr;
-  }
-
-  /// Get the number of linker options
-  uint32_t getLinkerOptCount() {
-    return _linkeropts.size();
-  }
-
-  /// Get the linker option at the specified index.
-  const char *getLinkerOpt(uint32_t index) {
-    if (index < _linkeropts.size())
-      return _linkeropts[index];
-    return nullptr;
+  const char *getLinkerOpts() {
+    return LinkerOpts.c_str();
   }
 
   const std::vector<const char*> &getAsmUndefinedRefs() {
@@ -224,5 +203,5 @@ private:
   static LTOModule *makeLTOModule(MemoryBufferRef Buffer, TargetOptions options,
                                   std::string &errMsg, LLVMContext *Context);
 };
-} // namespace llvm
+}
 #endif
diff --git a/include/llvm/LibDriver/LibDriver.h b/include/llvm/LibDriver/LibDriver.h
index 99c783c95cb6..aaaa7b7d21c3 100644
--- a/include/llvm/LibDriver/LibDriver.h
+++ b/include/llvm/LibDriver/LibDriver.h
@@ -15,9 +15,11 @@
 #ifndef LLVM_LIBDRIVER_LIBDRIVER_H
 #define LLVM_LIBDRIVER_LIBDRIVER_H
 
+#include "llvm/ADT/ArrayRef.h"
+
 namespace llvm {
 
-int libDriverMain(int argc, const char **argv);
+int libDriverMain(llvm::ArrayRef<const char*> ARgs);
 
 }
 
diff --git a/include/llvm/LineEditor/LineEditor.h b/include/llvm/LineEditor/LineEditor.h
index e644b1990f96..bb106f87ca48 100644
--- a/include/llvm/LineEditor/LineEditor.h
+++ b/include/llvm/LineEditor/LineEditor.h
@@ -148,6 +148,6 @@ private:
   std::unique_ptr<const CompleterConcept> Completer;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Linker/Linker.h b/include/llvm/Linker/Linker.h
index de23acb7e524..c43b90e9cd26 100644
--- a/include/llvm/Linker/Linker.h
+++ b/include/llvm/Linker/Linker.h
@@ -90,6 +90,6 @@ private:
   DiagnosticHandlerFunction DiagnosticHandler;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCAsmBackend.h b/include/llvm/MC/MCAsmBackend.h
index 07bba904788a..2bfad2d355b8 100644
--- a/include/llvm/MC/MCAsmBackend.h
+++ b/include/llvm/MC/MCAsmBackend.h
@@ -138,6 +138,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCAsmInfo.h b/include/llvm/MC/MCAsmInfo.h
index f72959a5c5a0..9bb0fa63c523 100644
--- a/include/llvm/MC/MCAsmInfo.h
+++ b/include/llvm/MC/MCAsmInfo.h
@@ -39,7 +39,7 @@ enum class EncodingType {
   X86,     /// Windows x86, uses no CFI, just EH tables
   MIPS = Alpha,
 };
-} // namespace WinEH
+}
 
 enum class ExceptionHandling {
   None,     /// No exception support
@@ -555,6 +555,6 @@ public:
 
   bool shouldUseLogicalShr() const { return UseLogicalShr; }
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/MC/MCAsmInfoCOFF.h b/include/llvm/MC/MCAsmInfoCOFF.h
index 24f03e4c9bad..56444f3c7cf5 100644
--- a/include/llvm/MC/MCAsmInfoCOFF.h
+++ b/include/llvm/MC/MCAsmInfoCOFF.h
@@ -30,7 +30,7 @@ namespace llvm {
   protected:
     explicit MCAsmInfoGNUCOFF();
   };
-} // namespace llvm
+}
 
 
 #endif // LLVM_MC_MCASMINFOCOFF_H
diff --git a/include/llvm/MC/MCCodeEmitter.h b/include/llvm/MC/MCCodeEmitter.h
index b4445d10c337..b6c19150c12a 100644
--- a/include/llvm/MC/MCCodeEmitter.h
+++ b/include/llvm/MC/MCCodeEmitter.h
@@ -41,6 +41,6 @@ public:
                                  const MCSubtargetInfo &STI) const = 0;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCELFObjectWriter.h b/include/llvm/MC/MCELFObjectWriter.h
index 855013a9cbbe..01f694d3b756 100644
--- a/include/llvm/MC/MCELFObjectWriter.h
+++ b/include/llvm/MC/MCELFObjectWriter.h
@@ -132,6 +132,6 @@ public:
 MCObjectWriter *createELFObjectWriter(MCELFObjectTargetWriter *MOTW,
                                       raw_pwrite_stream &OS,
                                       bool IsLittleEndian);
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCExternalSymbolizer.h b/include/llvm/MC/MCExternalSymbolizer.h
index a88b32e215e8..2c7d23707c95 100644
--- a/include/llvm/MC/MCExternalSymbolizer.h
+++ b/include/llvm/MC/MCExternalSymbolizer.h
@@ -53,6 +53,6 @@ public:
                                        uint64_t Address) override;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/MC/MCFixedLenDisassembler.h b/include/llvm/MC/MCFixedLenDisassembler.h
index 9fbdf9c22fba..ad99943df2c3 100644
--- a/include/llvm/MC/MCFixedLenDisassembler.h
+++ b/include/llvm/MC/MCFixedLenDisassembler.h
@@ -26,7 +26,7 @@ enum DecoderOps {
   OPC_Fail              // OPC_Fail()
 };
 
-} // namespace MCD
+} // namespace MCDecode
 } // namespace llvm
 
 #endif
diff --git a/include/llvm/MC/MCFixup.h b/include/llvm/MC/MCFixup.h
index c09f55a8ffc4..8ab477c401a1 100644
--- a/include/llvm/MC/MCFixup.h
+++ b/include/llvm/MC/MCFixup.h
@@ -108,6 +108,6 @@ public:
   SMLoc getLoc() const { return Loc; }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCFixupKindInfo.h b/include/llvm/MC/MCFixupKindInfo.h
index b779781f49bd..58183bd778e6 100644
--- a/include/llvm/MC/MCFixupKindInfo.h
+++ b/include/llvm/MC/MCFixupKindInfo.h
@@ -38,6 +38,6 @@ struct MCFixupKindInfo {
   unsigned Flags;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCInstrAnalysis.h b/include/llvm/MC/MCInstrAnalysis.h
index a0a68106bc80..8f5159e9e1c8 100644
--- a/include/llvm/MC/MCInstrAnalysis.h
+++ b/include/llvm/MC/MCInstrAnalysis.h
@@ -66,6 +66,6 @@ public:
                  uint64_t &Target) const;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCInstrDesc.h b/include/llvm/MC/MCInstrDesc.h
index fe67e4407672..3209a2ce0408 100644
--- a/include/llvm/MC/MCInstrDesc.h
+++ b/include/llvm/MC/MCInstrDesc.h
@@ -49,7 +49,7 @@ enum OperandType {
   OPERAND_PCREL = 4,
   OPERAND_FIRST_TARGET = 5
 };
-} // namespace MCOI
+}
 
 /// \brief This holds information about one operand of a machine instruction,
 /// indicating the register class for register operands, etc.
@@ -128,7 +128,7 @@ enum Flag {
   InsertSubreg,
   Convergent
 };
-} // namespace MCID
+}
 
 /// \brief Describe properties that are true of each instruction in the target
 /// description file.  This captures information about side effects, register
diff --git a/include/llvm/MC/MCInstrInfo.h b/include/llvm/MC/MCInstrInfo.h
index d75c4cad1f1a..70c86587b08c 100644
--- a/include/llvm/MC/MCInstrInfo.h
+++ b/include/llvm/MC/MCInstrInfo.h
@@ -54,6 +54,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCInstrItineraries.h b/include/llvm/MC/MCInstrItineraries.h
index a58bd7b4d396..161705de7c4e 100644
--- a/include/llvm/MC/MCInstrItineraries.h
+++ b/include/llvm/MC/MCInstrItineraries.h
@@ -234,6 +234,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCMachObjectWriter.h b/include/llvm/MC/MCMachObjectWriter.h
index 10b7905a82de..175d73e72c10 100644
--- a/include/llvm/MC/MCMachObjectWriter.h
+++ b/include/llvm/MC/MCMachObjectWriter.h
@@ -264,6 +264,6 @@ MCObjectWriter *createMachObjectWriter(MCMachObjectTargetWriter *MOTW,
                                        raw_pwrite_stream &OS,
                                        bool IsLittleEndian);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCObjectWriter.h b/include/llvm/MC/MCObjectWriter.h
index ca7fba547dc3..2211673efc31 100644
--- a/include/llvm/MC/MCObjectWriter.h
+++ b/include/llvm/MC/MCObjectWriter.h
@@ -188,6 +188,6 @@ public:
   /// @}
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCParser/MCAsmLexer.h b/include/llvm/MC/MCParser/MCAsmLexer.h
index 0bf8aa6d899a..71f15b37c331 100644
--- a/include/llvm/MC/MCParser/MCAsmLexer.h
+++ b/include/llvm/MC/MCParser/MCAsmLexer.h
@@ -190,6 +190,6 @@ public:
   void setAllowAtInIdentifier(bool v) { AllowAtInIdentifier = v; }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCParser/MCAsmParser.h b/include/llvm/MC/MCParser/MCAsmParser.h
index c840958fa91e..ac8706d99505 100644
--- a/include/llvm/MC/MCParser/MCAsmParser.h
+++ b/include/llvm/MC/MCParser/MCAsmParser.h
@@ -197,12 +197,23 @@ public:
   /// \brief Ensure that we have a valid section set in the streamer. Otherwise,
   /// report an error and switch to .text.
   virtual void checkForValidSection() = 0;
+
+  /// \brief Parse an arbitrary expression of a specified parenthesis depth,
+  /// assuming that the initial '(' characters have already been consumed.
+  ///
+  /// \param ParenDepth - Specifies how many trailing expressions outside the
+  /// current parentheses we have to parse.
+  /// \param Res - The value of the expression. The result is undefined
+  /// on error.
+  /// \return - False on success.
+  virtual bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
+                                     SMLoc &EndLoc) = 0;
 };
 
 /// \brief Create an MCAsmParser instance.
 MCAsmParser *createMCAsmParser(SourceMgr &, MCContext &, MCStreamer &,
                                const MCAsmInfo &);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCParser/MCAsmParserExtension.h b/include/llvm/MC/MCParser/MCAsmParserExtension.h
index 46f716e68e67..077fd21e073c 100644
--- a/include/llvm/MC/MCParser/MCAsmParserExtension.h
+++ b/include/llvm/MC/MCParser/MCAsmParserExtension.h
@@ -84,6 +84,6 @@ public:
   /// @}
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCParser/MCAsmParserUtils.h b/include/llvm/MC/MCParser/MCAsmParserUtils.h
new file mode 100644
index 000000000000..9834fe96307b
--- /dev/null
+++ b/include/llvm/MC/MCParser/MCAsmParserUtils.h
@@ -0,0 +1,33 @@
+//===------ llvm/MC/MCAsmParserUtils.h - Asm Parser Utilities ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCPARSER_MCASMPARSERUTILS_H
+#define LLVM_MC_MCPARSER_MCASMPARSERUTILS_H
+
+namespace llvm {
+
+class MCAsmParser;
+class MCExpr;
+class MCSymbol;
+class StringRef;
+
+namespace MCParserUtils {
+
+/// Parse a value expression and return whether it can be assigned to a symbol
+/// with the given name.
+///
+/// On success, returns false and sets the Symbol and Value output parameters.
+bool parseAssignmentExpression(StringRef Name, bool allow_redef,
+                               MCAsmParser &Parser, MCSymbol *&Symbol,
+                               const MCExpr *&Value);
+
+} // namespace MCParserUtils
+} // namespace llvm
+
+#endif
diff --git a/include/llvm/MC/MCRegisterInfo.h b/include/llvm/MC/MCRegisterInfo.h
index 7a41abcbf728..8e25ee18e08d 100644
--- a/include/llvm/MC/MCRegisterInfo.h
+++ b/include/llvm/MC/MCRegisterInfo.h
@@ -686,6 +686,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCRelocationInfo.h b/include/llvm/MC/MCRelocationInfo.h
index 8fc5c9f53a46..40e0217b8d83 100644
--- a/include/llvm/MC/MCRelocationInfo.h
+++ b/include/llvm/MC/MCRelocationInfo.h
@@ -50,6 +50,6 @@ public:
                                                      unsigned VariantKind);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/MC/MCSchedule.h b/include/llvm/MC/MCSchedule.h
index 635eab99be6a..1adfedd2638a 100644
--- a/include/llvm/MC/MCSchedule.h
+++ b/include/llvm/MC/MCSchedule.h
@@ -245,6 +245,6 @@ struct MCSchedModel {
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index 50d8d314ef4e..6b9b8a153845 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -78,7 +78,7 @@ public:
   MCTargetStreamer(MCStreamer &S);
   virtual ~MCTargetStreamer();
 
-  const MCStreamer &getStreamer() { return Streamer; }
+  MCStreamer &getStreamer() { return Streamer; }
 
   // Allow a target to add behavior to the EmitLabel of MCStreamer.
   virtual void emitLabel(MCSymbol *Symbol);
diff --git a/include/llvm/MC/MCSubtargetInfo.h b/include/llvm/MC/MCSubtargetInfo.h
index 0a23306fa694..b8ad02fbe696 100644
--- a/include/llvm/MC/MCSubtargetInfo.h
+++ b/include/llvm/MC/MCSubtargetInfo.h
@@ -160,6 +160,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCSymbol.h b/include/llvm/MC/MCSymbol.h
index 0acf6e50ba48..17e6b857cf20 100644
--- a/include/llvm/MC/MCSymbol.h
+++ b/include/llvm/MC/MCSymbol.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_MC_MCSYMBOL_H
 #define LLVM_MC_MCSYMBOL_H
 
+#include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/PointerUnion.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/MC/MCAssembler.h"
@@ -46,6 +47,15 @@ protected:
     SymbolKindMachO,
   };
 
+  /// A symbol can contain an Offset, or Value, or be Common, but never more
+  /// than one of these.
+  enum Contents : uint8_t {
+    SymContentsUnset,
+    SymContentsOffset,
+    SymContentsVariable,
+    SymContentsCommon,
+  };
+
   // Special sentinal value for the absolute pseudo section.
   //
   // FIXME: Use a PointerInt wrapper for this?
@@ -62,10 +72,12 @@ protected:
   ///
   /// If this is a fragment, then it gives the fragment this symbol's value is
   /// relative to, if any.
-  mutable PointerUnion<MCSection *, MCFragment *> SectionOrFragment;
-
-  /// Value - If non-null, the value for a variable symbol.
-  const MCExpr *Value;
+  ///
+  /// For the 'HasName' integer, this is true if this symbol is named.
+  /// A named symbol will have a pointer to the name allocated in the bytes
+  /// immediately prior to the MCSymbol.
+  mutable PointerIntPair<PointerUnion<MCSection *, MCFragment *>, 1>
+      SectionOrFragmentAndHasName;
 
   /// IsTemporary - True if this is an assembler temporary label, which
   /// typically does not survive in the .o file's symbol table.  Usually
@@ -86,11 +98,6 @@ protected:
   /// This symbol is private extern.
   mutable unsigned IsPrivateExtern : 1;
 
-  /// True if this symbol is named.
-  /// A named symbol will have a pointer to the name allocated in the bytes
-  /// immediately prior to the MCSymbol.
-  unsigned HasName : 1;
-
   /// LLVM RTTI discriminator. This is actually a SymbolKind enumerator, but is
   /// unsigned to avoid sign extension and achieve better bitpacking with MSVC.
   unsigned Kind : 2;
@@ -98,6 +105,23 @@ protected:
   /// True if we have created a relocation that uses this symbol.
   mutable unsigned IsUsedInReloc : 1;
 
+  /// This is actually a Contents enumerator, but is unsigned to avoid sign
+  /// extension and achieve better bitpacking with MSVC.
+  unsigned SymbolContents : 2;
+
+  /// The alignment of the symbol, if it is 'common', or -1.
+  ///
+  /// The alignment is stored as log2(align) + 1.  This allows all values from
+  /// 0 to 2^31 to be stored which is every power of 2 representable by an
+  /// unsigned.
+  static const unsigned NumCommonAlignmentBits = 5;
+  unsigned CommonAlignLog2 : NumCommonAlignmentBits;
+
+  /// The Flags field is used by object file implementations to store
+  /// additional per symbol information which is not easily classified.
+  static const unsigned NumFlagsBits = 16;
+  mutable uint32_t Flags : NumFlagsBits;
+
   /// Index field, for use by the object file implementation.
   mutable uint32_t Index = 0;
 
@@ -107,16 +131,10 @@ protected:
 
     /// The size of the symbol, if it is 'common'.
     uint64_t CommonSize;
-  };
 
-  /// The alignment of the symbol, if it is 'common', or -1.
-  //
-  // FIXME: Pack this in with other fields?
-  unsigned CommonAlign = -1U;
-
-  /// The Flags field is used by object file implementations to store
-  /// additional per symbol information which is not easily classified.
-  mutable uint32_t Flags = 0;
+    /// If non-null, the value for a variable symbol.
+    const MCExpr *Value;
+  };
 
 protected: // MCContext creates and uniques these.
   friend class MCExpr;
@@ -132,11 +150,12 @@ protected: // MCContext creates and uniques these.
   } NameEntryStorageTy;
 
   MCSymbol(SymbolKind Kind, const StringMapEntry<bool> *Name, bool isTemporary)
-      : Value(nullptr), IsTemporary(isTemporary), IsRedefinable(false),
-        IsUsed(false), IsRegistered(false), IsExternal(false),
-        IsPrivateExtern(false), HasName(!!Name), Kind(Kind),
-        IsUsedInReloc(false) {
+      : IsTemporary(isTemporary), IsRedefinable(false), IsUsed(false),
+        IsRegistered(false), IsExternal(false), IsPrivateExtern(false),
+        Kind(Kind), IsUsedInReloc(false), SymbolContents(SymContentsUnset),
+        CommonAlignLog2(0), Flags(0) {
     Offset = 0;
+    SectionOrFragmentAndHasName.setInt(!!Name);
     if (Name)
       getNameEntryPtr() = Name;
   }
@@ -163,16 +182,17 @@ private:
   MCSection *getSectionPtr() const {
     if (MCFragment *F = getFragment())
       return F->getParent();
+    const auto &SectionOrFragment = SectionOrFragmentAndHasName.getPointer();
     assert(!SectionOrFragment.is<MCFragment *>() && "Section or null expected");
     MCSection *Section = SectionOrFragment.dyn_cast<MCSection *>();
-    if (Section || !Value)
+    if (Section || !isVariable())
       return Section;
-    return Section = Value->findAssociatedSection();
+    return Section = getVariableValue()->findAssociatedSection();
   }
 
   /// \brief Get a reference to the name field.  Requires that we have a name
   const StringMapEntry<bool> *&getNameEntryPtr() {
-    assert(HasName && "Name is required");
+    assert(SectionOrFragmentAndHasName.getInt() && "Name is required");
     NameEntryStorageTy *Name = reinterpret_cast<NameEntryStorageTy *>(this);
     return (*(Name - 1)).NameEntry;
   }
@@ -183,7 +203,7 @@ private:
 public:
   /// getName - Get the symbol name.
   StringRef getName() const {
-    if (!HasName)
+    if (!SectionOrFragmentAndHasName.getInt())
       return StringRef();
 
     return getNameEntryPtr()->first();
@@ -212,8 +232,11 @@ public:
   /// \brief Prepare this symbol to be redefined.
   void redefineIfPossible() {
     if (IsRedefinable) {
-      Value = nullptr;
-      SectionOrFragment = nullptr;
+      if (SymbolContents == SymContentsVariable) {
+        Value = nullptr;
+        SymbolContents = SymContentsUnset;
+      }
+      setUndefined();
       IsRedefinable = false;
     }
   }
@@ -246,13 +269,15 @@ public:
   /// Mark the symbol as defined in the section \p S.
   void setSection(MCSection &S) {
     assert(!isVariable() && "Cannot set section of variable");
-    assert(!SectionOrFragment.is<MCFragment *>() && "Section or null expected");
-    SectionOrFragment = &S;
+    assert(!SectionOrFragmentAndHasName.getPointer().is<MCFragment *>() &&
+           "Section or null expected");
+    SectionOrFragmentAndHasName.setPointer(&S);
   }
 
   /// Mark the symbol as undefined.
   void setUndefined() {
-    SectionOrFragment = nullptr;
+    SectionOrFragmentAndHasName.setPointer(
+        PointerUnion<MCSection *, MCFragment *>());
   }
 
   bool isELF() const { return Kind == SymbolKindELF; }
@@ -266,7 +291,9 @@ public:
   /// @{
 
   /// isVariable - Check if this is a variable symbol.
-  bool isVariable() const { return Value != nullptr; }
+  bool isVariable() const {
+    return SymbolContents == SymContentsVariable;
+  }
 
   /// getVariableValue() - Get the value for variable symbols.
   const MCExpr *getVariableValue() const {
@@ -290,12 +317,17 @@ public:
   }
 
   uint64_t getOffset() const {
-    assert(!isCommon());
+    assert((SymbolContents == SymContentsUnset ||
+            SymbolContents == SymContentsOffset) &&
+           "Cannot get offset for a common/variable symbol");
     return Offset;
   }
   void setOffset(uint64_t Value) {
-    assert(!isCommon());
+    assert((SymbolContents == SymContentsUnset ||
+            SymbolContents == SymContentsOffset) &&
+           "Cannot set offset for a common/variable symbol");
     Offset = Value;
+    SymbolContents = SymContentsOffset;
   }
 
   /// Return the size of a 'common' symbol.
@@ -311,13 +343,20 @@ public:
   void setCommon(uint64_t Size, unsigned Align) {
     assert(getOffset() == 0);
     CommonSize = Size;
-    CommonAlign = Align;
+    SymbolContents = SymContentsCommon;
+
+    assert((!Align || isPowerOf2_32(Align)) &&
+           "Alignment must be a power of 2");
+    unsigned Log2Align = Log2_32(Align) + 1;
+    assert(Log2Align < (1U << NumCommonAlignmentBits) &&
+           "Out of range alignment");
+    CommonAlignLog2 = Log2Align;
   }
 
   ///  Return the alignment of a 'common' symbol.
   unsigned getCommonAlignment() const {
     assert(isCommon() && "Not a 'common' symbol!");
-    return CommonAlign;
+    return CommonAlignLog2 ? (1U << (CommonAlignLog2 - 1)) : 0;
   }
 
   /// Declare this symbol as being 'common'.
@@ -328,7 +367,7 @@ public:
   bool declareCommon(uint64_t Size, unsigned Align) {
     assert(isCommon() || getOffset() == 0);
     if(isCommon()) {
-      if(CommonSize != Size || CommonAlign != Align)
+      if(CommonSize != Size || getCommonAlignment() != Align)
        return true;
     } else
       setCommon(Size, Align);
@@ -336,13 +375,15 @@ public:
   }
 
   /// Is this a 'common' symbol.
-  bool isCommon() const { return CommonAlign != -1U; }
+  bool isCommon() const {
+    return SymbolContents == SymContentsCommon;
+  }
 
   MCFragment *getFragment() const {
-    return SectionOrFragment.dyn_cast<MCFragment *>();
+    return SectionOrFragmentAndHasName.getPointer().dyn_cast<MCFragment *>();
   }
   void setFragment(MCFragment *Value) const {
-    SectionOrFragment = Value;
+    SectionOrFragmentAndHasName.setPointer(Value);
   }
 
   bool isExternal() const { return IsExternal; }
@@ -362,10 +403,14 @@ protected:
   uint32_t getFlags() const { return Flags; }
 
   /// Set the (implementation defined) symbol flags.
-  void setFlags(uint32_t Value) const { Flags = Value; }
+  void setFlags(uint32_t Value) const {
+    assert(Value < (1U << NumFlagsBits) && "Out of range flags");
+    Flags = Value;
+  }
 
   /// Modify the flags via a mask
   void modifyFlags(uint32_t Value, uint32_t Mask) const {
+    assert(Value < (1U << NumFlagsBits) && "Out of range flags");
     Flags = (Flags & ~Mask) | Value;
   }
 };
diff --git a/include/llvm/MC/MCSymbolCOFF.h b/include/llvm/MC/MCSymbolCOFF.h
index 3b853f788c8d..2172c67981c0 100644
--- a/include/llvm/MC/MCSymbolCOFF.h
+++ b/include/llvm/MC/MCSymbolCOFF.h
@@ -59,6 +59,6 @@ public:
 
   static bool classof(const MCSymbol *S) { return S->isCOFF(); }
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/MC/MCSymbolELF.h b/include/llvm/MC/MCSymbolELF.h
index b0ce3fe158c4..bbcd22e8e7db 100644
--- a/include/llvm/MC/MCSymbolELF.h
+++ b/include/llvm/MC/MCSymbolELF.h
@@ -49,6 +49,6 @@ public:
 private:
   void setIsBindingSet() const;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/MC/MCSymbolMachO.h b/include/llvm/MC/MCSymbolMachO.h
index a16208088b99..166ae9e755a1 100644
--- a/include/llvm/MC/MCSymbolMachO.h
+++ b/include/llvm/MC/MCSymbolMachO.h
@@ -118,6 +118,6 @@ public:
 
   static bool classof(const MCSymbol *S) { return S->isMachO(); }
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/MC/MCSymbolizer.h b/include/llvm/MC/MCSymbolizer.h
index 41c1b0d897f9..2ef17673f091 100644
--- a/include/llvm/MC/MCSymbolizer.h
+++ b/include/llvm/MC/MCSymbolizer.h
@@ -80,6 +80,6 @@ public:
                                                uint64_t Address) = 0;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/MC/MCTargetAsmParser.h b/include/llvm/MC/MCTargetAsmParser.h
index 4ee53adee599..36db3914f017 100644
--- a/include/llvm/MC/MCTargetAsmParser.h
+++ b/include/llvm/MC/MCTargetAsmParser.h
@@ -201,6 +201,6 @@ public:
   virtual void onLabelParsed(MCSymbol *Symbol) { };
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCWin64EH.h b/include/llvm/MC/MCWin64EH.h
index f2211d73f60a..0e81a191cd2c 100644
--- a/include/llvm/MC/MCWin64EH.h
+++ b/include/llvm/MC/MCWin64EH.h
@@ -57,7 +57,7 @@ public:
   void Emit(MCStreamer &Streamer) const override;
   void EmitUnwindInfo(MCStreamer &Streamer, WinEH::FrameInfo *FI) const override;
 };
-} // namespace Win64EH
+}
 } // end namespace llvm
 
 #endif
diff --git a/include/llvm/MC/MCWinCOFFObjectWriter.h b/include/llvm/MC/MCWinCOFFObjectWriter.h
index edf87f5f9cf9..e2e95c7df710 100644
--- a/include/llvm/MC/MCWinCOFFObjectWriter.h
+++ b/include/llvm/MC/MCWinCOFFObjectWriter.h
@@ -42,6 +42,6 @@ class raw_pwrite_stream;
   /// \returns The constructed object writer.
   MCObjectWriter *createWinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW,
                                             raw_pwrite_stream &OS);
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/MCWinCOFFStreamer.h b/include/llvm/MC/MCWinCOFFStreamer.h
index fcca838bbf17..6fbc754f1125 100644
--- a/include/llvm/MC/MCWinCOFFStreamer.h
+++ b/include/llvm/MC/MCWinCOFFStreamer.h
@@ -75,7 +75,7 @@ protected:
 private:
   LLVM_ATTRIBUTE_NORETURN void FatalError(const Twine &Msg) const;
 };
-} // namespace llvm
+}
 
 #endif
 
diff --git a/include/llvm/MC/MCWinEH.h b/include/llvm/MC/MCWinEH.h
index d22791e239d5..723d7a397c49 100644
--- a/include/llvm/MC/MCWinEH.h
+++ b/include/llvm/MC/MCWinEH.h
@@ -78,7 +78,7 @@ public:
   virtual void Emit(MCStreamer &Streamer) const = 0;
   virtual void EmitUnwindInfo(MCStreamer &Streamer, FrameInfo *FI) const = 0;
 };
-} // namespace WinEH
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/MC/MachineLocation.h b/include/llvm/MC/MachineLocation.h
index 1c421821ce9d..2a18615eff62 100644
--- a/include/llvm/MC/MachineLocation.h
+++ b/include/llvm/MC/MachineLocation.h
@@ -78,6 +78,6 @@ inline bool operator!=(const MachineLocation &LHS, const MachineLocation &RHS) {
   return !(LHS == RHS);
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/MC/StringTableBuilder.h b/include/llvm/MC/StringTableBuilder.h
index 700a8a6e340d..897d449254ea 100644
--- a/include/llvm/MC/StringTableBuilder.h
+++ b/include/llvm/MC/StringTableBuilder.h
@@ -62,6 +62,6 @@ private:
   }
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/MC/YAML.h b/include/llvm/MC/YAML.h
index ae8329829a59..383cdc6785fa 100644
--- a/include/llvm/MC/YAML.h
+++ b/include/llvm/MC/YAML.h
@@ -89,6 +89,6 @@ template <> struct ScalarTraits<BinaryRef> {
   static StringRef input(StringRef, void *, BinaryRef &);
   static bool mustQuote(StringRef S) { return needsQuotes(S); }
 };
-} // namespace yaml
-} // namespace llvm
+}
+}
 #endif
diff --git a/include/llvm/Object/Archive.h b/include/llvm/Object/Archive.h
index 3a52a9dc9be3..8da6919a4655 100644
--- a/include/llvm/Object/Archive.h
+++ b/include/llvm/Object/Archive.h
@@ -217,7 +217,7 @@ private:
   unsigned IsThin : 1;
 };
 
-} // namespace object
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Object/ArchiveWriter.h b/include/llvm/Object/ArchiveWriter.h
index 8a394fa4f44e..1616e46d3e6f 100644
--- a/include/llvm/Object/ArchiveWriter.h
+++ b/include/llvm/Object/ArchiveWriter.h
@@ -46,6 +46,6 @@ std::pair<StringRef, std::error_code>
 writeArchive(StringRef ArcName, std::vector<NewArchiveIterator> &NewMembers,
              bool WriteSymtab);
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Object/Binary.h b/include/llvm/Object/Binary.h
index 949edf8e7811..a3d6d0d4d428 100644
--- a/include/llvm/Object/Binary.h
+++ b/include/llvm/Object/Binary.h
@@ -178,7 +178,7 @@ template <typename T> const T* OwningBinary<T>::getBinary() const {
 }
 
 ErrorOr<OwningBinary<Binary>> createBinary(StringRef Path);
-} // namespace object
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Object/COFF.h b/include/llvm/Object/COFF.h
index ad657b591fb4..fc605826a8b0 100644
--- a/include/llvm/Object/COFF.h
+++ b/include/llvm/Object/COFF.h
@@ -249,6 +249,15 @@ struct coff_symbol {
 typedef coff_symbol<support::ulittle16_t> coff_symbol16;
 typedef coff_symbol<support::ulittle32_t> coff_symbol32;
 
+// Contains only common parts of coff_symbol16 and coff_symbol32.
+struct coff_symbol_generic {
+  union {
+    char ShortName[COFF::NameSize];
+    StringTableOffset Offset;
+  } Name;
+  support::ulittle32_t Value;
+};
+
 class COFFSymbolRef {
 public:
   COFFSymbolRef(const coff_symbol16 *CS) : CS16(CS), CS32(nullptr) {}
@@ -259,6 +268,12 @@ public:
     return CS16 ? static_cast<const void *>(CS16) : CS32;
   }
 
+  const coff_symbol_generic *getGeneric() const {
+    if (CS16)
+      return reinterpret_cast<const coff_symbol_generic *>(CS16);
+    return reinterpret_cast<const coff_symbol_generic *>(CS32);
+  }
+
   friend bool operator<(COFFSymbolRef A, COFFSymbolRef B) {
     return A.getRawPtr() < B.getRawPtr();
   }
@@ -493,6 +508,29 @@ struct coff_load_configuration32 {
   support::ulittle32_t SEHandlerCount;
 };
 
+struct coff_load_configuration64 {
+  support::ulittle32_t Characteristics;
+  support::ulittle32_t TimeDateStamp;
+  support::ulittle16_t MajorVersion;
+  support::ulittle16_t MinorVersion;
+  support::ulittle32_t GlobalFlagsClear;
+  support::ulittle32_t GlobalFlagsSet;
+  support::ulittle32_t CriticalSectionDefaultTimeout;
+  support::ulittle32_t DeCommitFreeBlockThreshold;
+  support::ulittle32_t DeCommitTotalFreeThreshold;
+  support::ulittle32_t LockPrefixTable;
+  support::ulittle32_t MaximumAllocationSize;
+  support::ulittle32_t VirtualMemoryThreshold;
+  support::ulittle32_t ProcessAffinityMask;
+  support::ulittle32_t ProcessHeapFlags;
+  support::ulittle16_t CSDVersion;
+  support::ulittle16_t Reserved;
+  support::ulittle32_t EditList;
+  support::ulittle64_t SecurityCookie;
+  support::ulittle64_t SEHandlerTable;
+  support::ulittle64_t SEHandlerCount;
+};
+
 struct coff_runtime_function_x64 {
   support::ulittle32_t BeginAddress;
   support::ulittle32_t EndAddress;
@@ -609,14 +647,13 @@ public:
   }
 protected:
   void moveSymbolNext(DataRefImpl &Symb) const override;
-  std::error_code getSymbolName(DataRefImpl Symb,
-                                StringRef &Res) const override;
+  ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override;
   std::error_code getSymbolAddress(DataRefImpl Symb,
                                    uint64_t &Res) const override;
-  uint64_t getSymbolSize(DataRefImpl Symb) const override;
+  uint64_t getSymbolValue(DataRefImpl Symb) const override;
+  uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
   uint32_t getSymbolFlags(DataRefImpl Symb) const override;
-  std::error_code getSymbolType(DataRefImpl Symb,
-                                SymbolRef::Type &Res) const override;
+  SymbolRef::Type getSymbolType(DataRefImpl Symb) const override;
   std::error_code getSymbolSection(DataRefImpl Symb,
                                    section_iterator &Res) const override;
   void moveSectionNext(DataRefImpl &Sec) const override;
@@ -631,21 +668,17 @@ protected:
   bool isSectionData(DataRefImpl Sec) const override;
   bool isSectionBSS(DataRefImpl Sec) const override;
   bool isSectionVirtual(DataRefImpl Sec) const override;
-  bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override;
   relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
   relocation_iterator section_rel_end(DataRefImpl Sec) const override;
 
   void moveRelocationNext(DataRefImpl &Rel) const override;
-  std::error_code getRelocationAddress(DataRefImpl Rel,
-                                       uint64_t &Res) const override;
-  std::error_code getRelocationOffset(DataRefImpl Rel,
-                                      uint64_t &Res) const override;
+  ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const override;
+  uint64_t getRelocationOffset(DataRefImpl Rel) const override;
   symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
-  std::error_code getRelocationType(DataRefImpl Rel,
-                                    uint64_t &Res) const override;
-  std::error_code
-  getRelocationTypeName(DataRefImpl Rel,
-                        SmallVectorImpl<char> &Result) const override;
+  uint64_t getRelocationType(DataRefImpl Rel) const override;
+  void getRelocationTypeName(DataRefImpl Rel,
+                             SmallVectorImpl<char> &Result) const override;
+
 public:
   COFFObjectFile(MemoryBufferRef Object, std::error_code &EC);
   basic_symbol_iterator symbol_begin_impl() const override;
@@ -657,6 +690,8 @@ public:
   COFFSymbolRef getCOFFSymbol(const DataRefImpl &Ref) const;
   COFFSymbolRef getCOFFSymbol(const SymbolRef &Symbol) const;
   const coff_relocation *getCOFFRelocation(const RelocationRef &Reloc) const;
+  unsigned getSectionID(SectionRef Sec) const;
+  unsigned getSymbolSectionID(SymbolRef Sym) const;
 
   uint8_t getBytesInAddress() const override;
   StringRef getFileFormatName() const override;
@@ -720,6 +755,8 @@ public:
     return std::error_code();
   }
   std::error_code getSymbolName(COFFSymbolRef Symbol, StringRef &Res) const;
+  std::error_code getSymbolName(const coff_symbol_generic *Symbol,
+                                StringRef &Res) const;
 
   ArrayRef<uint8_t> getSymbolAuxData(COFFSymbolRef Symbol) const;
 
@@ -731,6 +768,9 @@ public:
     llvm_unreachable("null symbol table pointer!");
   }
 
+  iterator_range<const coff_relocation *>
+  getRelocations(const coff_section *Sec) const;
+
   std::error_code getSectionName(const coff_section *Sec, StringRef &Res) const;
   uint64_t getSectionSize(const coff_section *Sec) const;
   std::error_code getSectionContents(const coff_section *Sec,
diff --git a/include/llvm/Object/COFFYAML.h b/include/llvm/Object/COFFYAML.h
index 5ba3db3e679d..12a25223bd37 100644
--- a/include/llvm/Object/COFFYAML.h
+++ b/include/llvm/Object/COFFYAML.h
@@ -37,7 +37,7 @@ inline DLLCharacteristics operator|(DLLCharacteristics a,
   uint16_t Ret = static_cast<uint16_t>(a) | static_cast<uint16_t>(b);
   return static_cast<DLLCharacteristics>(Ret);
 }
-} // namespace COFF
+}
 
 // The structure of the yaml files is not an exact 1:1 match to COFF. In order
 // to use yaml::IO, we use these structures which are closer to the source.
@@ -87,8 +87,8 @@ namespace COFFYAML {
     std::vector<Symbol> Symbols;
     Object();
   };
-} // namespace COFFYAML
-} // namespace llvm
+}
+}
 
 LLVM_YAML_IS_SEQUENCE_VECTOR(COFFYAML::Section)
 LLVM_YAML_IS_SEQUENCE_VECTOR(COFFYAML::Symbol)
diff --git a/include/llvm/Object/ELF.h b/include/llvm/Object/ELF.h
index e87737dcce7a..3b0c548ffe15 100644
--- a/include/llvm/Object/ELF.h
+++ b/include/llvm/Object/ELF.h
@@ -143,8 +143,7 @@ public:
   typedef iterator_range<Elf_Dyn_Iter> Elf_Dyn_Range;
   typedef ELFEntityIterator<const Elf_Rela> Elf_Rela_Iter;
   typedef ELFEntityIterator<const Elf_Rel> Elf_Rel_Iter;
-  typedef ELFEntityIterator<const Elf_Shdr> Elf_Shdr_Iter;
-  typedef iterator_range<Elf_Shdr_Iter> Elf_Shdr_Range;
+  typedef iterator_range<const Elf_Shdr *> Elf_Shdr_Range;
 
   /// \brief Archive files are 2 byte aligned, so we need this for
   ///     PointerIntPair to work.
@@ -158,74 +157,7 @@ public:
     enum { NumLowBitsAvailable = 1 };
   };
 
-  class Elf_Sym_Iter {
-  public:
-    typedef ptrdiff_t difference_type;
-    typedef const Elf_Sym value_type;
-    typedef std::random_access_iterator_tag iterator_category;
-    typedef value_type &reference;
-    typedef value_type *pointer;
-
-    /// \brief Default construct iterator.
-    Elf_Sym_Iter() : EntitySize(0), Current(0, false) {}
-    Elf_Sym_Iter(uintX_t EntSize, const char *Start, bool IsDynamic)
-        : EntitySize(EntSize), Current(Start, IsDynamic) {}
-
-    reference operator*() {
-      assert(Current.getPointer() &&
-             "Attempted to dereference an invalid iterator!");
-      return *reinterpret_cast<pointer>(Current.getPointer());
-    }
-
-    pointer operator->() {
-      assert(Current.getPointer() &&
-             "Attempted to dereference an invalid iterator!");
-      return reinterpret_cast<pointer>(Current.getPointer());
-    }
-
-    bool operator==(const Elf_Sym_Iter &Other) {
-      return Current == Other.Current;
-    }
-
-    bool operator!=(const Elf_Sym_Iter &Other) { return !(*this == Other); }
-
-    Elf_Sym_Iter &operator++() {
-      assert(Current.getPointer() &&
-             "Attempted to increment an invalid iterator!");
-      Current.setPointer(Current.getPointer() + EntitySize);
-      return *this;
-    }
-
-    Elf_Sym_Iter operator++(int) {
-      Elf_Sym_Iter Tmp = *this;
-      ++*this;
-      return Tmp;
-    }
-
-    Elf_Sym_Iter operator+(difference_type Dist) {
-      assert(Current.getPointer() &&
-             "Attempted to increment an invalid iterator!");
-      Current.setPointer(Current.getPointer() + EntitySize * Dist);
-      return *this;
-    }
-
-    difference_type operator-(const Elf_Sym_Iter &Other) const {
-      assert(EntitySize == Other.EntitySize &&
-             "Subtracting iterators of different EntitySize!");
-      return (Current.getPointer() - Other.Current.getPointer()) / EntitySize;
-    }
-
-    const char *get() const { return Current.getPointer(); }
-
-    bool isDynamic() const { return Current.getInt(); }
-
-    uintX_t getEntSize() const { return EntitySize; }
-
-  private:
-    uintX_t EntitySize;
-    PointerIntPair<const char *, 1, bool,
-                   ArchivePointerTypeTraits<const char> > Current;
-  };
+  typedef iterator_range<const Elf_Sym *> Elf_Sym_Range;
 
 private:
   typedef SmallVector<const Elf_Shdr *, 2> Sections_t;
@@ -238,17 +170,19 @@ private:
   }
 
   const Elf_Ehdr *Header;
-  const Elf_Shdr *SectionHeaderTable;
-  const Elf_Shdr *dot_shstrtab_sec; // Section header string table.
-  const Elf_Shdr *dot_strtab_sec;   // Symbol header string table.
-  const Elf_Shdr *dot_symtab_sec;   // Symbol table section.
-
-  const Elf_Shdr *SymbolTableSectionHeaderIndex;
+  const Elf_Shdr *SectionHeaderTable = nullptr;
+  StringRef DotShstrtab;                    // Section header string table.
+  StringRef DotStrtab;                      // Symbol header string table.
+  const Elf_Shdr *dot_symtab_sec = nullptr; // Symbol table section.
+  StringRef DynSymStrTab;                   // Dynnamic symbol string table.
+  const Elf_Shdr *DotDynSymSec = nullptr;   // Dynamic symbol table section.
+
+  const Elf_Shdr *SymbolTableSectionHeaderIndex = nullptr;
   DenseMap<const Elf_Sym *, ELF::Elf64_Word> ExtendedSymbolTable;
 
-  const Elf_Shdr *dot_gnu_version_sec;   // .gnu.version
-  const Elf_Shdr *dot_gnu_version_r_sec; // .gnu.version_r
-  const Elf_Shdr *dot_gnu_version_d_sec; // .gnu.version_d
+  const Elf_Shdr *dot_gnu_version_sec = nullptr;   // .gnu.version
+  const Elf_Shdr *dot_gnu_version_r_sec = nullptr; // .gnu.version_r
+  const Elf_Shdr *dot_gnu_version_d_sec = nullptr; // .gnu.version_d
 
   /// \brief Represents a region described by entries in the .dynamic table.
   struct DynRegionInfo {
@@ -263,12 +197,11 @@ private:
 
   DynRegionInfo DynamicRegion;
   DynRegionInfo DynHashRegion;
-  DynRegionInfo DynStrRegion;
-  DynRegionInfo DynSymRegion;
+  DynRegionInfo DynRelaRegion;
 
   // Pointer to SONAME entry in dynamic string table
   // This is set the first time getLoadName is called.
-  mutable const char *dt_soname;
+  mutable const char *dt_soname = nullptr;
 
   // Records for each version index the corresponding Verdef or Vernaux entry.
   // This is filled the first time LoadVersionMap() is called.
@@ -301,8 +234,11 @@ public:
   const T        *getEntry(uint32_t Section, uint32_t Entry) const;
   template <typename T>
   const T *getEntry(const Elf_Shdr *Section, uint32_t Entry) const;
-  const char     *getString(uint32_t section, uint32_t offset) const;
-  const char     *getString(const Elf_Shdr *section, uint32_t offset) const;
+
+  const Elf_Shdr *getDotSymtabSec() const { return dot_symtab_sec; }
+  const Elf_Shdr *getDotDynSymSec() const { return DotDynSymSec; }
+
+  ErrorOr<StringRef> getStringTable(const Elf_Shdr *Section) const;
   const char *getDynamicString(uintX_t Offset) const;
   ErrorOr<StringRef> getSymbolVersion(const Elf_Shdr *section,
                                       const Elf_Sym *Symb,
@@ -331,55 +267,77 @@ public:
       Header->getDataEncoding() == ELF::ELFDATA2LSB;
   }
 
-  Elf_Shdr_Iter begin_sections() const;
-  Elf_Shdr_Iter end_sections() const;
+  const Elf_Shdr *section_begin() const;
+  const Elf_Shdr *section_end() const;
   Elf_Shdr_Range sections() const {
-    return make_range(begin_sections(), end_sections());
+    return make_range(section_begin(), section_end());
   }
 
-  Elf_Sym_Iter begin_symbols() const;
-  Elf_Sym_Iter end_symbols() const;
+  const Elf_Sym *symbol_begin() const;
+  const Elf_Sym *symbol_end() const;
+  Elf_Sym_Range symbols() const {
+    return make_range(symbol_begin(), symbol_end());
+  }
 
-  Elf_Dyn_Iter begin_dynamic_table() const;
+  Elf_Dyn_Iter dynamic_table_begin() const;
   /// \param NULLEnd use one past the first DT_NULL entry as the end instead of
   /// the section size.
-  Elf_Dyn_Iter end_dynamic_table(bool NULLEnd = false) const;
+  Elf_Dyn_Iter dynamic_table_end(bool NULLEnd = false) const;
   Elf_Dyn_Range dynamic_table(bool NULLEnd = false) const {
-    return make_range(begin_dynamic_table(), end_dynamic_table(NULLEnd));
+    return make_range(dynamic_table_begin(), dynamic_table_end(NULLEnd));
+  }
+
+  const Elf_Sym *dynamic_symbol_begin() const {
+    if (!DotDynSymSec)
+      return nullptr;
+    if (DotDynSymSec->sh_entsize != sizeof(Elf_Sym))
+      report_fatal_error("Invalid symbol size");
+    return reinterpret_cast<const Elf_Sym *>(base() + DotDynSymSec->sh_offset);
+  }
+
+  const Elf_Sym *dynamic_symbol_end() const {
+    if (!DotDynSymSec)
+      return nullptr;
+    return reinterpret_cast<const Elf_Sym *>(base() + DotDynSymSec->sh_offset +
+                                             DotDynSymSec->sh_size);
   }
 
-  Elf_Sym_Iter begin_dynamic_symbols() const {
-    if (DynSymRegion.Addr)
-      return Elf_Sym_Iter(DynSymRegion.EntSize, (const char *)DynSymRegion.Addr,
-                          true);
-    return Elf_Sym_Iter(0, nullptr, true);
+  Elf_Sym_Range dynamic_symbols() const {
+    return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
   }
 
-  Elf_Sym_Iter end_dynamic_symbols() const {
-    if (DynSymRegion.Addr)
-      return Elf_Sym_Iter(DynSymRegion.EntSize,
-                          (const char *)DynSymRegion.Addr + DynSymRegion.Size,
-                          true);
-    return Elf_Sym_Iter(0, nullptr, true);
+  Elf_Rela_Iter dyn_rela_begin() const {
+    if (DynRelaRegion.Addr)
+      return Elf_Rela_Iter(DynRelaRegion.EntSize,
+        (const char *)DynRelaRegion.Addr);
+    return Elf_Rela_Iter(0, nullptr);
   }
 
-  Elf_Rela_Iter begin_rela(const Elf_Shdr *sec) const {
+  Elf_Rela_Iter dyn_rela_end() const {
+    if (DynRelaRegion.Addr)
+      return Elf_Rela_Iter(
+        DynRelaRegion.EntSize,
+        (const char *)DynRelaRegion.Addr + DynRelaRegion.Size);
+    return Elf_Rela_Iter(0, nullptr);
+  }
+
+  Elf_Rela_Iter rela_begin(const Elf_Shdr *sec) const {
     return Elf_Rela_Iter(sec->sh_entsize,
                          (const char *)(base() + sec->sh_offset));
   }
 
-  Elf_Rela_Iter end_rela(const Elf_Shdr *sec) const {
+  Elf_Rela_Iter rela_end(const Elf_Shdr *sec) const {
     return Elf_Rela_Iter(
         sec->sh_entsize,
         (const char *)(base() + sec->sh_offset + sec->sh_size));
   }
 
-  Elf_Rel_Iter begin_rel(const Elf_Shdr *sec) const {
+  Elf_Rel_Iter rel_begin(const Elf_Shdr *sec) const {
     return Elf_Rel_Iter(sec->sh_entsize,
                         (const char *)(base() + sec->sh_offset));
   }
 
-  Elf_Rel_Iter end_rel(const Elf_Shdr *sec) const {
+  Elf_Rel_Iter rel_end(const Elf_Shdr *sec) const {
     return Elf_Rel_Iter(sec->sh_entsize,
                         (const char *)(base() + sec->sh_offset + sec->sh_size));
   }
@@ -387,12 +345,12 @@ public:
   /// \brief Iterate over program header table.
   typedef ELFEntityIterator<const Elf_Phdr> Elf_Phdr_Iter;
 
-  Elf_Phdr_Iter begin_program_headers() const {
+  Elf_Phdr_Iter program_header_begin() const {
     return Elf_Phdr_Iter(Header->e_phentsize,
                          (const char*)base() + Header->e_phoff);
   }
 
-  Elf_Phdr_Iter end_program_headers() const {
+  Elf_Phdr_Iter program_header_end() const {
     return Elf_Phdr_Iter(Header->e_phentsize,
                          (const char*)base() +
                            Header->e_phoff +
@@ -401,24 +359,17 @@ public:
 
   uint64_t getNumSections() const;
   uintX_t getStringTableIndex() const;
-  ELF::Elf64_Word getSymbolTableIndex(const Elf_Sym *symb) const;
+  ELF::Elf64_Word getExtendedSymbolTableIndex(const Elf_Sym *symb) const;
   const Elf_Ehdr *getHeader() const { return Header; }
-  const Elf_Shdr *getSection(const Elf_Sym *symb) const;
-  const Elf_Shdr *getSection(uint32_t Index) const;
+  ErrorOr<const Elf_Shdr *> getSection(const Elf_Sym *symb) const;
+  ErrorOr<const Elf_Shdr *> getSection(uint32_t Index) const;
   const Elf_Sym *getSymbol(uint32_t index) const;
 
-  ErrorOr<StringRef> getSymbolName(Elf_Sym_Iter Sym) const;
+  ErrorOr<StringRef> getStaticSymbolName(const Elf_Sym *Symb) const;
+  ErrorOr<StringRef> getDynamicSymbolName(const Elf_Sym *Symb) const;
+  ErrorOr<StringRef> getSymbolName(const Elf_Sym *Symb, bool IsDynamic) const;
 
-  /// \brief Get the name of \p Symb.
-  /// \param SymTab The symbol table section \p Symb is contained in.
-  /// \param Symb The symbol to get the name of.
-  ///
-  /// \p SymTab is used to lookup the string table to use to get the symbol's
-  /// name.
-  ErrorOr<StringRef> getSymbolName(const Elf_Shdr *SymTab,
-                                   const Elf_Sym *Symb) const;
   ErrorOr<StringRef> getSectionName(const Elf_Shdr *Section) const;
-  uint64_t getSymbolIndex(const Elf_Sym *sym) const;
   ErrorOr<ArrayRef<uint8_t> > getSectionContents(const Elf_Shdr *Sec) const;
   StringRef getLoadName() const;
 };
@@ -490,7 +441,7 @@ void ELFFile<ELFT>::LoadVersionNeeds(const Elf_Shdr *sec) const {
 template <class ELFT>
 void ELFFile<ELFT>::LoadVersionMap() const {
   // If there is no dynamic symtab or version table, there is nothing to do.
-  if (!DynSymRegion.Addr || !dot_gnu_version_sec)
+  if (!DotDynSymSec || !dot_gnu_version_sec)
     return;
 
   // Has the VersionMap already been loaded?
@@ -510,18 +461,19 @@ void ELFFile<ELFT>::LoadVersionMap() const {
 }
 
 template <class ELFT>
-ELF::Elf64_Word ELFFile<ELFT>::getSymbolTableIndex(const Elf_Sym *symb) const {
-  if (symb->st_shndx == ELF::SHN_XINDEX)
-    return ExtendedSymbolTable.lookup(symb);
-  return symb->st_shndx;
+ELF::Elf64_Word
+ELFFile<ELFT>::getExtendedSymbolTableIndex(const Elf_Sym *symb) const {
+  assert(symb->st_shndx == ELF::SHN_XINDEX);
+  return ExtendedSymbolTable.lookup(symb);
 }
 
 template <class ELFT>
-const typename ELFFile<ELFT>::Elf_Shdr *
+ErrorOr<const typename ELFFile<ELFT>::Elf_Shdr *>
 ELFFile<ELFT>::getSection(const Elf_Sym *symb) const {
-  if (symb->st_shndx == ELF::SHN_XINDEX)
+  uint32_t Index = symb->st_shndx;
+  if (Index == ELF::SHN_XINDEX)
     return getSection(ExtendedSymbolTable.lookup(symb));
-  if (symb->st_shndx >= ELF::SHN_LORESERVE)
+  if (Index == ELF::SHN_UNDEF || Index >= ELF::SHN_LORESERVE)
     return nullptr;
   return getSection(symb->st_shndx);
 }
@@ -529,7 +481,7 @@ ELFFile<ELFT>::getSection(const Elf_Sym *symb) const {
 template <class ELFT>
 const typename ELFFile<ELFT>::Elf_Sym *
 ELFFile<ELFT>::getSymbol(uint32_t Index) const {
-  return &*(begin_symbols() + Index);
+  return &*(symbol_begin() + Index);
 }
 
 template <class ELFT>
@@ -584,20 +536,14 @@ std::pair<const typename ELFFile<ELFT>::Elf_Shdr *,
 ELFFile<ELFT>::getRelocationSymbol(const Elf_Shdr *Sec, const RelT *Rel) const {
   if (!Sec->sh_link)
     return std::make_pair(nullptr, nullptr);
-  const Elf_Shdr *SymTable = getSection(Sec->sh_link);
+  ErrorOr<const Elf_Shdr *> SymTableOrErr = getSection(Sec->sh_link);
+  if (std::error_code EC = SymTableOrErr.getError())
+    report_fatal_error(EC.message());
+  const Elf_Shdr *SymTable = *SymTableOrErr;
   return std::make_pair(
       SymTable, getEntry<Elf_Sym>(SymTable, Rel->getSymbol(isMips64EL())));
 }
 
-// Verify that the last byte in the string table in a null.
-template <class ELFT>
-void ELFFile<ELFT>::VerifyStrTab(const Elf_Shdr *sh) const {
-  const char *strtab = (const char *)base() + sh->sh_offset;
-  if (strtab[sh->sh_size - 1] != 0)
-    // FIXME: Proper error handling.
-    report_fatal_error("String table must end with a null terminator!");
-}
-
 template <class ELFT>
 uint64_t ELFFile<ELFT>::getNumSections() const {
   assert(Header && "Header not initialized!");
@@ -621,11 +567,7 @@ typename ELFFile<ELFT>::uintX_t ELFFile<ELFT>::getStringTableIndex() const {
 
 template <class ELFT>
 ELFFile<ELFT>::ELFFile(StringRef Object, std::error_code &EC)
-    : Buf(Object), SectionHeaderTable(nullptr), dot_shstrtab_sec(nullptr),
-      dot_strtab_sec(nullptr), dot_symtab_sec(nullptr),
-      SymbolTableSectionHeaderIndex(nullptr), dot_gnu_version_sec(nullptr),
-      dot_gnu_version_r_sec(nullptr), dot_gnu_version_d_sec(nullptr),
-      dt_soname(nullptr) {
+    : Buf(Object) {
   const uint64_t FileSize = Buf.size();
 
   if (sizeof(Elf_Ehdr) > FileSize) {
@@ -670,28 +612,35 @@ ELFFile<ELFT>::ELFFile(StringRef Object, std::error_code &EC)
       }
       SymbolTableSectionHeaderIndex = &Sec;
       break;
-    case ELF::SHT_SYMTAB:
+    case ELF::SHT_SYMTAB: {
       if (dot_symtab_sec) {
         // More than one .symtab!
         EC = object_error::parse_failed;
         return;
       }
       dot_symtab_sec = &Sec;
-      dot_strtab_sec = getSection(Sec.sh_link);
-      break;
+      ErrorOr<const Elf_Shdr *> SectionOrErr = getSection(Sec.sh_link);
+      if ((EC = SectionOrErr.getError()))
+        return;
+      ErrorOr<StringRef> SymtabOrErr = getStringTable(*SectionOrErr);
+      if ((EC = SymtabOrErr.getError()))
+        return;
+      DotStrtab = *SymtabOrErr;
+    } break;
     case ELF::SHT_DYNSYM: {
-      if (DynSymRegion.Addr) {
+      if (DotDynSymSec) {
         // More than one .dynsym!
         EC = object_error::parse_failed;
         return;
       }
-      DynSymRegion.Addr = base() + Sec.sh_offset;
-      DynSymRegion.Size = Sec.sh_size;
-      DynSymRegion.EntSize = Sec.sh_entsize;
-      const Elf_Shdr *DynStr = getSection(Sec.sh_link);
-      DynStrRegion.Addr = base() + DynStr->sh_offset;
-      DynStrRegion.Size = DynStr->sh_size;
-      DynStrRegion.EntSize = DynStr->sh_entsize;
+      DotDynSymSec = &Sec;
+      ErrorOr<const Elf_Shdr *> SectionOrErr = getSection(Sec.sh_link);
+      if ((EC = SectionOrErr.getError()))
+        return;
+      ErrorOr<StringRef> SymtabOrErr = getStringTable(*SectionOrErr);
+      if ((EC = SymtabOrErr.getError()))
+        return;
+      DynSymStrTab = *SymtabOrErr;
       break;
     }
     case ELF::SHT_DYNAMIC:
@@ -732,27 +681,29 @@ ELFFile<ELFT>::ELFFile(StringRef Object, std::error_code &EC)
   }
 
   // Get string table sections.
-  dot_shstrtab_sec = getSection(getStringTableIndex());
-  if (dot_shstrtab_sec) {
-    // Verify that the last byte in the string table in a null.
-    VerifyStrTab(dot_shstrtab_sec);
-  }
+  ErrorOr<const Elf_Shdr *> StrTabSecOrErr = getSection(getStringTableIndex());
+  if ((EC = StrTabSecOrErr.getError()))
+    return;
+
+  ErrorOr<StringRef> SymtabOrErr = getStringTable(*StrTabSecOrErr);
+  if ((EC = SymtabOrErr.getError()))
+    return;
+  DotShstrtab = *SymtabOrErr;
 
   // Build symbol name side-mapping if there is one.
   if (SymbolTableSectionHeaderIndex) {
     const Elf_Word *ShndxTable = reinterpret_cast<const Elf_Word*>(base() +
                                       SymbolTableSectionHeaderIndex->sh_offset);
-    for (Elf_Sym_Iter SI = begin_symbols(), SE = end_symbols(); SI != SE;
-         ++SI) {
+    for (const Elf_Sym &S : symbols()) {
       if (*ShndxTable != ELF::SHN_UNDEF)
-        ExtendedSymbolTable[&*SI] = *ShndxTable;
+        ExtendedSymbolTable[&S] = *ShndxTable;
       ++ShndxTable;
     }
   }
 
   // Scan program headers.
-  for (Elf_Phdr_Iter PhdrI = begin_program_headers(),
-                     PhdrE = end_program_headers();
+  for (Elf_Phdr_Iter PhdrI = program_header_begin(),
+                     PhdrE = program_header_end();
        PhdrI != PhdrE; ++PhdrI) {
     if (PhdrI->p_type == ELF::PT_DYNAMIC) {
       DynamicRegion.Addr = base() + PhdrI->p_offset;
@@ -762,55 +713,74 @@ ELFFile<ELFT>::ELFFile(StringRef Object, std::error_code &EC)
     }
   }
 
-  EC = std::error_code();
-}
+  // Scan dynamic table.
+  for (Elf_Dyn_Iter DynI = dynamic_table_begin(), DynE = dynamic_table_end();
+       DynI != DynE; ++DynI) {
+    switch (DynI->d_tag) {
+    case ELF::DT_RELA: {
+      uint64_t VBase = 0;
+      const uint8_t *FBase = nullptr;
+      for (Elf_Phdr_Iter PhdrI = program_header_begin(),
+                         PhdrE = program_header_end();
+           PhdrI != PhdrE; ++PhdrI) {
+        if (PhdrI->p_type != ELF::PT_LOAD)
+          continue;
+        if (DynI->getPtr() >= PhdrI->p_vaddr &&
+            DynI->getPtr() < PhdrI->p_vaddr + PhdrI->p_memsz) {
+          VBase = PhdrI->p_vaddr;
+          FBase = base() + PhdrI->p_offset;
+          break;
+        }
+      }
+      if (!VBase)
+        return;
+      DynRelaRegion.Addr = FBase + DynI->getPtr() - VBase;
+      break;
+    }
+    case ELF::DT_RELASZ:
+      DynRelaRegion.Size = DynI->getVal();
+      break;
+    case ELF::DT_RELAENT:
+      DynRelaRegion.EntSize = DynI->getVal();
+    }
+  }
 
-// Get the symbol table index in the symtab section given a symbol
-template <class ELFT>
-uint64_t ELFFile<ELFT>::getSymbolIndex(const Elf_Sym *Sym) const {
-  uintptr_t SymLoc = uintptr_t(Sym);
-  uintptr_t SymTabLoc = uintptr_t(base() + dot_symtab_sec->sh_offset);
-  assert(SymLoc > SymTabLoc && "Symbol not in symbol table!");
-  uint64_t SymOffset = SymLoc - SymTabLoc;
-  assert(SymOffset % dot_symtab_sec->sh_entsize == 0 &&
-         "Symbol not multiple of symbol size!");
-  return SymOffset / dot_symtab_sec->sh_entsize;
+  EC = std::error_code();
 }
 
 template <class ELFT>
-typename ELFFile<ELFT>::Elf_Shdr_Iter ELFFile<ELFT>::begin_sections() const {
-  return Elf_Shdr_Iter(Header->e_shentsize,
-                       (const char *)base() + Header->e_shoff);
+const typename ELFFile<ELFT>::Elf_Shdr *ELFFile<ELFT>::section_begin() const {
+  if (Header->e_shentsize != sizeof(Elf_Shdr))
+    report_fatal_error(
+        "Invalid section header entry size (e_shentsize) in ELF header");
+  return reinterpret_cast<const Elf_Shdr *>(base() + Header->e_shoff);
 }
 
 template <class ELFT>
-typename ELFFile<ELFT>::Elf_Shdr_Iter ELFFile<ELFT>::end_sections() const {
-  return Elf_Shdr_Iter(Header->e_shentsize,
-                       (const char *)base() + Header->e_shoff +
-                           (getNumSections() * Header->e_shentsize));
+const typename ELFFile<ELFT>::Elf_Shdr *ELFFile<ELFT>::section_end() const {
+  return section_begin() + getNumSections();
 }
 
 template <class ELFT>
-typename ELFFile<ELFT>::Elf_Sym_Iter ELFFile<ELFT>::begin_symbols() const {
+const typename ELFFile<ELFT>::Elf_Sym *ELFFile<ELFT>::symbol_begin() const {
   if (!dot_symtab_sec)
-    return Elf_Sym_Iter(0, nullptr, false);
-  return Elf_Sym_Iter(dot_symtab_sec->sh_entsize,
-                      (const char *)base() + dot_symtab_sec->sh_offset, false);
+    return nullptr;
+  if (dot_symtab_sec->sh_entsize != sizeof(Elf_Sym))
+    report_fatal_error("Invalid symbol size");
+  return reinterpret_cast<const Elf_Sym *>(base() + dot_symtab_sec->sh_offset);
 }
 
 template <class ELFT>
-typename ELFFile<ELFT>::Elf_Sym_Iter ELFFile<ELFT>::end_symbols() const {
+const typename ELFFile<ELFT>::Elf_Sym *ELFFile<ELFT>::symbol_end() const {
   if (!dot_symtab_sec)
-    return Elf_Sym_Iter(0, nullptr, false);
-  return Elf_Sym_Iter(dot_symtab_sec->sh_entsize,
-                      (const char *)base() + dot_symtab_sec->sh_offset +
-                          dot_symtab_sec->sh_size,
-                      false);
+    return nullptr;
+  return reinterpret_cast<const Elf_Sym *>(base() + dot_symtab_sec->sh_offset +
+                                           dot_symtab_sec->sh_size);
 }
 
 template <class ELFT>
 typename ELFFile<ELFT>::Elf_Dyn_Iter
-ELFFile<ELFT>::begin_dynamic_table() const {
+ELFFile<ELFT>::dynamic_table_begin() const {
   if (DynamicRegion.Addr)
     return Elf_Dyn_Iter(DynamicRegion.EntSize,
                         (const char *)DynamicRegion.Addr);
@@ -819,14 +789,14 @@ ELFFile<ELFT>::begin_dynamic_table() const {
 
 template <class ELFT>
 typename ELFFile<ELFT>::Elf_Dyn_Iter
-ELFFile<ELFT>::end_dynamic_table(bool NULLEnd) const {
+ELFFile<ELFT>::dynamic_table_end(bool NULLEnd) const {
   if (!DynamicRegion.Addr)
     return Elf_Dyn_Iter(0, nullptr);
   Elf_Dyn_Iter Ret(DynamicRegion.EntSize,
                     (const char *)DynamicRegion.Addr + DynamicRegion.Size);
 
   if (NULLEnd) {
-    Elf_Dyn_Iter Start = begin_dynamic_table();
+    Elf_Dyn_Iter Start = dynamic_table_begin();
     while (Start != Ret && Start->getTag() != ELF::DT_NULL)
       ++Start;
 
@@ -855,7 +825,10 @@ StringRef ELFFile<ELFT>::getLoadName() const {
 template <class ELFT>
 template <typename T>
 const T *ELFFile<ELFT>::getEntry(uint32_t Section, uint32_t Entry) const {
-  return getEntry<T>(getSection(Section), Entry);
+  ErrorOr<const Elf_Shdr *> Sec = getSection(Section);
+  if (std::error_code EC = Sec.getError())
+    report_fatal_error(EC.message());
+  return getEntry<T>(*Sec, Entry);
 }
 
 template <class ELFT>
@@ -867,82 +840,85 @@ const T *ELFFile<ELFT>::getEntry(const Elf_Shdr *Section,
 }
 
 template <class ELFT>
-const typename ELFFile<ELFT>::Elf_Shdr *
-ELFFile<ELFT>::getSection(uint32_t index) const {
-  if (index == 0)
-    return nullptr;
-  if (!SectionHeaderTable || index >= getNumSections())
-    // FIXME: Proper error handling.
-    report_fatal_error("Invalid section index!");
+ErrorOr<const typename ELFFile<ELFT>::Elf_Shdr *>
+ELFFile<ELFT>::getSection(uint32_t Index) const {
+  assert(SectionHeaderTable && "SectionHeaderTable not initialized!");
+  if (Index >= getNumSections())
+    return object_error::invalid_section_index;
 
   return reinterpret_cast<const Elf_Shdr *>(
-         reinterpret_cast<const char *>(SectionHeaderTable)
-         + (index * Header->e_shentsize));
+      reinterpret_cast<const char *>(SectionHeaderTable) +
+      (Index * Header->e_shentsize));
 }
 
 template <class ELFT>
-const char *ELFFile<ELFT>::getString(uint32_t section,
-                                     ELF::Elf32_Word offset) const {
-  return getString(getSection(section), offset);
-}
-
-template <class ELFT>
-const char *ELFFile<ELFT>::getString(const Elf_Shdr *section,
-                                     ELF::Elf32_Word offset) const {
-  assert(section && section->sh_type == ELF::SHT_STRTAB && "Invalid section!");
-  if (offset >= section->sh_size)
-    // FIXME: Proper error handling.
-    report_fatal_error("Symbol name offset outside of string table!");
-  return (const char *)base() + section->sh_offset + offset;
+ErrorOr<StringRef>
+ELFFile<ELFT>::getStringTable(const Elf_Shdr *Section) const {
+  if (Section->sh_type != ELF::SHT_STRTAB)
+    return object_error::parse_failed;
+  uint64_t Offset = Section->sh_offset;
+  uint64_t Size = Section->sh_size;
+  if (Offset + Size > Buf.size())
+    return object_error::parse_failed;
+  StringRef Data((const char *)base() + Section->sh_offset, Size);
+  if (Data[Size - 1] != '\0')
+    return object_error::string_table_non_null_end;
+  return Data;
 }
 
 template <class ELFT>
 const char *ELFFile<ELFT>::getDynamicString(uintX_t Offset) const {
-  if (!DynStrRegion.Addr || Offset >= DynStrRegion.Size)
+  if (!DotDynSymSec || Offset >= DynSymStrTab.size())
     return nullptr;
-  return (const char *)DynStrRegion.Addr + Offset;
+  return (const char *)DynSymStrTab.begin() + Offset;
 }
 
 template <class ELFT>
-ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(Elf_Sym_Iter Sym) const {
-  if (!Sym.isDynamic())
-    return getSymbolName(dot_symtab_sec, &*Sym);
-
-  if (!DynStrRegion.Addr || Sym->st_name >= DynStrRegion.Size)
-    return object_error::parse_failed;
-  return StringRef(getDynamicString(Sym->st_name));
+ErrorOr<StringRef>
+ELFFile<ELFT>::getStaticSymbolName(const Elf_Sym *Symb) const {
+  return Symb->getName(DotStrtab);
 }
 
 template <class ELFT>
-ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(const Elf_Shdr *Section,
-                                                const Elf_Sym *Symb) const {
-  if (Symb->st_name == 0)
-    return StringRef("");
+ErrorOr<StringRef>
+ELFFile<ELFT>::getDynamicSymbolName(const Elf_Sym *Symb) const {
+  return StringRef(getDynamicString(Symb->st_name));
+}
 
-  const Elf_Shdr *StrTab = getSection(Section->sh_link);
-  if (Symb->st_name >= StrTab->sh_size)
-    return object_error::parse_failed;
-  return StringRef(getString(StrTab, Symb->st_name));
+template <class ELFT>
+ErrorOr<StringRef> ELFFile<ELFT>::getSymbolName(const Elf_Sym *Symb,
+                                                bool IsDynamic) const {
+  if (IsDynamic)
+    return getDynamicSymbolName(Symb);
+  return getStaticSymbolName(Symb);
 }
 
 template <class ELFT>
 ErrorOr<StringRef>
 ELFFile<ELFT>::getSectionName(const Elf_Shdr *Section) const {
-  if (Section->sh_name >= dot_shstrtab_sec->sh_size)
+  uint32_t Offset = Section->sh_name;
+  if (Offset >= DotShstrtab.size())
     return object_error::parse_failed;
-  return StringRef(getString(dot_shstrtab_sec, Section->sh_name));
+  return StringRef(DotShstrtab.data() + Offset);
 }
 
 template <class ELFT>
 ErrorOr<StringRef> ELFFile<ELFT>::getSymbolVersion(const Elf_Shdr *section,
                                                    const Elf_Sym *symb,
                                                    bool &IsDefault) const {
+  StringRef StrTab;
+  if (section) {
+    ErrorOr<StringRef> StrTabOrErr = getStringTable(section);
+    if (std::error_code EC = StrTabOrErr.getError())
+      return EC;
+    StrTab = *StrTabOrErr;
+  }
   // Handle non-dynamic symbols.
-  if (section != DynSymRegion.Addr && section != nullptr) {
+  if (section != DotDynSymSec && section != nullptr) {
     // Non-dynamic symbols can have versions in their names
     // A name of the form 'foo@V1' indicates version 'V1', non-default.
     // A name of the form 'foo@@V2' indicates version 'V2', default version.
-    ErrorOr<StringRef> SymName = getSymbolName(section, symb);
+    ErrorOr<StringRef> SymName = symb->getName(StrTab);
     if (!SymName)
       return SymName;
     StringRef Name = *SymName;
@@ -969,8 +945,10 @@ ErrorOr<StringRef> ELFFile<ELFT>::getSymbolVersion(const Elf_Shdr *section,
   }
 
   // Determine the position in the symbol table of this entry.
-  size_t entry_index = ((const char *)symb - (const char *)DynSymRegion.Addr) /
-                       DynSymRegion.EntSize;
+  size_t entry_index =
+      (reinterpret_cast<uintptr_t>(symb) - DotDynSymSec->sh_offset -
+       reinterpret_cast<uintptr_t>(base())) /
+      sizeof(Elf_Sym);
 
   // Get the corresponding version index entry
   const Elf_Versym *vs = getEntry<Elf_Versym>(dot_gnu_version_sec, entry_index);
@@ -1005,7 +983,7 @@ ErrorOr<StringRef> ELFFile<ELFT>::getSymbolVersion(const Elf_Shdr *section,
     IsDefault = false;
   }
 
-  if (name_offset >= DynStrRegion.Size)
+  if (name_offset >= DynSymStrTab.size())
     return object_error::parse_failed;
   return StringRef(getDynamicString(name_offset));
 }
diff --git a/include/llvm/Object/ELFObjectFile.h b/include/llvm/Object/ELFObjectFile.h
index 7fc56adff1df..5b9b113a2f0b 100644
--- a/include/llvm/Object/ELFObjectFile.h
+++ b/include/llvm/Object/ELFObjectFile.h
@@ -35,27 +35,148 @@
 namespace llvm {
 namespace object {
 
+class elf_symbol_iterator;
+class ELFSymbolRef;
+class ELFRelocationRef;
+
 class ELFObjectFileBase : public ObjectFile {
+  friend class ELFSymbolRef;
+  friend class ELFSectionRef;
+  friend class ELFRelocationRef;
+
 protected:
   ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source);
 
-public:
-  virtual ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0;
+  virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0;
+  virtual uint8_t getSymbolOther(DataRefImpl Symb) const = 0;
+  virtual uint8_t getSymbolELFType(DataRefImpl Symb) const = 0;
 
-  // FIXME: This is a bit of a hack. Every caller should know if it expecting
-  // and addend or not.
-  virtual bool hasRelocationAddend(DataRefImpl Rel) const = 0;
+  virtual uint32_t getSectionType(DataRefImpl Sec) const = 0;
+  virtual uint64_t getSectionFlags(DataRefImpl Sec) const = 0;
 
-  virtual std::pair<symbol_iterator, symbol_iterator>
-  getELFDynamicSymbolIterators() const = 0;
+  virtual ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0;
+public:
 
-  virtual uint64_t getSectionFlags(SectionRef Sec) const = 0;
-  virtual uint32_t getSectionType(SectionRef Sec) const = 0;
+  typedef iterator_range<elf_symbol_iterator> elf_symbol_iterator_range;
+  virtual elf_symbol_iterator_range getDynamicSymbolIterators() const = 0;
+
+  elf_symbol_iterator_range symbols() const;
 
   static inline bool classof(const Binary *v) { return v->isELF(); }
 };
 
+class ELFSectionRef : public SectionRef {
+public:
+  ELFSectionRef(const SectionRef &B) : SectionRef(B) {
+    assert(isa<ELFObjectFileBase>(SectionRef::getObject()));
+  }
+
+  const ELFObjectFileBase *getObject() const {
+    return cast<ELFObjectFileBase>(SectionRef::getObject());
+  }
+
+  uint32_t getType() const {
+    return getObject()->getSectionType(getRawDataRefImpl());
+  }
+
+  uint64_t getFlags() const {
+    return getObject()->getSectionFlags(getRawDataRefImpl());
+  }
+};
+
+class elf_section_iterator : public section_iterator {
+public:
+  elf_section_iterator(const section_iterator &B) : section_iterator(B) {
+    assert(isa<ELFObjectFileBase>(B->getObject()));
+  }
+
+  const ELFSectionRef *operator->() const {
+    return static_cast<const ELFSectionRef *>(section_iterator::operator->());
+  }
+
+  const ELFSectionRef &operator*() const {
+    return static_cast<const ELFSectionRef &>(section_iterator::operator*());
+  }
+};
+
+class ELFSymbolRef : public SymbolRef {
+public:
+  ELFSymbolRef(const SymbolRef &B) : SymbolRef(B) {
+    assert(isa<ELFObjectFileBase>(SymbolRef::getObject()));
+  }
+
+  const ELFObjectFileBase *getObject() const {
+    return cast<ELFObjectFileBase>(BasicSymbolRef::getObject());
+  }
+
+  uint64_t getSize() const {
+    return getObject()->getSymbolSize(getRawDataRefImpl());
+  }
+
+  uint8_t getOther() const {
+    return getObject()->getSymbolOther(getRawDataRefImpl());
+  }
+
+  uint8_t getELFType() const {
+    return getObject()->getSymbolELFType(getRawDataRefImpl());
+  }
+};
+
+class elf_symbol_iterator : public symbol_iterator {
+public:
+  elf_symbol_iterator(const basic_symbol_iterator &B)
+      : symbol_iterator(SymbolRef(B->getRawDataRefImpl(),
+                                  cast<ELFObjectFileBase>(B->getObject()))) {}
+
+  const ELFSymbolRef *operator->() const {
+    return static_cast<const ELFSymbolRef *>(symbol_iterator::operator->());
+  }
+
+  const ELFSymbolRef &operator*() const {
+    return static_cast<const ELFSymbolRef &>(symbol_iterator::operator*());
+  }
+};
+
+class ELFRelocationRef : public RelocationRef {
+public:
+  ELFRelocationRef(const RelocationRef &B) : RelocationRef(B) {
+    assert(isa<ELFObjectFileBase>(RelocationRef::getObject()));
+  }
+
+  const ELFObjectFileBase *getObject() const {
+    return cast<ELFObjectFileBase>(RelocationRef::getObject());
+  }
+
+  ErrorOr<int64_t> getAddend() const {
+    return getObject()->getRelocationAddend(getRawDataRefImpl());
+  }
+};
+
+class elf_relocation_iterator : public relocation_iterator {
+public:
+  elf_relocation_iterator(const relocation_iterator &B)
+      : relocation_iterator(RelocationRef(
+            B->getRawDataRefImpl(), cast<ELFObjectFileBase>(B->getObject()))) {}
+
+  const ELFRelocationRef *operator->() const {
+    return static_cast<const ELFRelocationRef *>(
+        relocation_iterator::operator->());
+  }
+
+  const ELFRelocationRef &operator*() const {
+    return static_cast<const ELFRelocationRef &>(
+        relocation_iterator::operator*());
+  }
+};
+
+inline ELFObjectFileBase::elf_symbol_iterator_range
+ELFObjectFileBase::symbols() const {
+  return elf_symbol_iterator_range(symbol_begin(), symbol_end());
+}
+
 template <class ELFT> class ELFObjectFile : public ELFObjectFileBase {
+  uint64_t getSymbolSize(DataRefImpl Sym) const override;
+
 public:
   LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
 
@@ -68,24 +189,22 @@ public:
   typedef typename ELFFile<ELFT>::Elf_Rela Elf_Rela;
   typedef typename ELFFile<ELFT>::Elf_Dyn Elf_Dyn;
 
-  typedef typename ELFFile<ELFT>::Elf_Sym_Iter Elf_Sym_Iter;
-  typedef typename ELFFile<ELFT>::Elf_Shdr_Iter Elf_Shdr_Iter;
   typedef typename ELFFile<ELFT>::Elf_Dyn_Iter Elf_Dyn_Iter;
 
 protected:
   ELFFile<ELFT> EF;
 
   void moveSymbolNext(DataRefImpl &Symb) const override;
-  std::error_code getSymbolName(DataRefImpl Symb,
-                                StringRef &Res) const override;
+  ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override;
   std::error_code getSymbolAddress(DataRefImpl Symb,
                                    uint64_t &Res) const override;
+  uint64_t getSymbolValue(DataRefImpl Symb) const override;
   uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
-  uint64_t getSymbolSize(DataRefImpl Symb) const override;
+  uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
   uint32_t getSymbolFlags(DataRefImpl Symb) const override;
-  std::error_code getSymbolOther(DataRefImpl Symb, uint8_t &Res) const override;
-  std::error_code getSymbolType(DataRefImpl Symb,
-                                SymbolRef::Type &Res) const override;
+  uint8_t getSymbolOther(DataRefImpl Symb) const override;
+  uint8_t getSymbolELFType(DataRefImpl Symb) const override;
+  SymbolRef::Type getSymbolType(DataRefImpl Symb) const override;
   section_iterator getSymbolSection(const Elf_Sym *Symb) const;
   std::error_code getSymbolSection(DataRefImpl Symb,
                                    section_iterator &Res) const override;
@@ -102,62 +221,55 @@ protected:
   bool isSectionData(DataRefImpl Sec) const override;
   bool isSectionBSS(DataRefImpl Sec) const override;
   bool isSectionVirtual(DataRefImpl Sec) const override;
-  bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override;
   relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
   relocation_iterator section_rel_end(DataRefImpl Sec) const override;
   section_iterator getRelocatedSection(DataRefImpl Sec) const override;
 
   void moveRelocationNext(DataRefImpl &Rel) const override;
-  std::error_code getRelocationAddress(DataRefImpl Rel,
-                                       uint64_t &Res) const override;
-  std::error_code getRelocationOffset(DataRefImpl Rel,
-                                      uint64_t &Res) const override;
+  ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const override;
+  uint64_t getRelocationOffset(DataRefImpl Rel) const override;
   symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
-  std::error_code getRelocationType(DataRefImpl Rel,
-                                    uint64_t &Res) const override;
-  std::error_code
-  getRelocationTypeName(DataRefImpl Rel,
-                        SmallVectorImpl<char> &Result) const override;
+  uint64_t getRelocationType(DataRefImpl Rel) const override;
+  void getRelocationTypeName(DataRefImpl Rel,
+                             SmallVectorImpl<char> &Result) const override;
 
+  uint32_t getSectionType(DataRefImpl Sec) const override;
+  uint64_t getSectionFlags(DataRefImpl Sec) const override;
   uint64_t getROffset(DataRefImpl Rel) const;
   StringRef getRelocationTypeName(uint32_t Type) const;
 
   /// \brief Get the relocation section that contains \a Rel.
   const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
-    return EF.getSection(Rel.d.a);
+    return *EF.getSection(Rel.d.a);
   }
 
-  const Elf_Rel *getRel(DataRefImpl Rel) const;
-  const Elf_Rela *getRela(DataRefImpl Rela) const;
-
-  Elf_Sym_Iter toELFSymIter(DataRefImpl Symb) const {
-    bool IsDynamic = Symb.p & 1;
-    if (IsDynamic)
-      return Elf_Sym_Iter(
-          EF.begin_dynamic_symbols().getEntSize(),
-          reinterpret_cast<const char *>(Symb.p & ~uintptr_t(1)), IsDynamic);
-    return Elf_Sym_Iter(EF.begin_symbols().getEntSize(),
-                        reinterpret_cast<const char *>(Symb.p), IsDynamic);
+  const Elf_Sym *toELFSymIter(DataRefImpl Sym) const {
+    return EF.template getEntry<Elf_Sym>(Sym.d.a, Sym.d.b);
   }
 
-  DataRefImpl toDRI(Elf_Sym_Iter Symb) const {
+  DataRefImpl toDRI(const Elf_Shdr *SymTable, unsigned SymbolNum) const {
     DataRefImpl DRI;
-    DRI.p = reinterpret_cast<uintptr_t>(Symb.get()) |
-      static_cast<uintptr_t>(Symb.isDynamic());
-    return DRI;
-  }
+    if (!SymTable) {
+      DRI.d.a = 0;
+      DRI.d.b = 0;
+      return DRI;
+    }
+    assert(SymTable->sh_type == ELF::SHT_SYMTAB ||
+           SymTable->sh_type == ELF::SHT_DYNSYM);
 
-  Elf_Shdr_Iter toELFShdrIter(DataRefImpl Sec) const {
-    return Elf_Shdr_Iter(EF.getHeader()->e_shentsize,
-                         reinterpret_cast<const char *>(Sec.p));
-  }
+    uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
+    unsigned SymTableIndex =
+        (reinterpret_cast<uintptr_t>(SymTable) - SHT) / sizeof(Elf_Shdr);
 
-  DataRefImpl toDRI(Elf_Shdr_Iter Sec) const {
-    DataRefImpl DRI;
-    DRI.p = reinterpret_cast<uintptr_t>(Sec.get());
+    DRI.d.a = SymTableIndex;
+    DRI.d.b = SymbolNum;
     return DRI;
   }
 
+  const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
+    return reinterpret_cast<const Elf_Shdr *>(Sec.p);
+  }
+
   DataRefImpl toDRI(const Elf_Shdr *Sec) const {
     DataRefImpl DRI;
     DRI.p = reinterpret_cast<uintptr_t>(Sec);
@@ -197,22 +309,21 @@ protected:
 public:
   ELFObjectFile(MemoryBufferRef Object, std::error_code &EC);
 
+  const Elf_Rel *getRel(DataRefImpl Rel) const;
+  const Elf_Rela *getRela(DataRefImpl Rela) const;
+
   const Elf_Sym *getSymbol(DataRefImpl Symb) const;
 
   basic_symbol_iterator symbol_begin_impl() const override;
   basic_symbol_iterator symbol_end_impl() const override;
 
-  symbol_iterator dynamic_symbol_begin() const;
-  symbol_iterator dynamic_symbol_end() const;
+  elf_symbol_iterator dynamic_symbol_begin() const;
+  elf_symbol_iterator dynamic_symbol_end() const;
 
   section_iterator section_begin() const override;
   section_iterator section_end() const override;
 
   ErrorOr<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
-  bool hasRelocationAddend(DataRefImpl Rel) const override;
-
-  uint64_t getSectionFlags(SectionRef Sec) const override;
-  uint32_t getSectionType(SectionRef Sec) const override;
 
   uint8_t getBytesInAddress() const override;
   StringRef getFileFormatName() const override;
@@ -232,8 +343,7 @@ public:
                                       ELFT::Is64Bits);
   }
 
-  std::pair<symbol_iterator, symbol_iterator>
-  getELFDynamicSymbolIterators() const override;
+  elf_symbol_iterator_range getDynamicSymbolIterators() const override;
 
   bool isRelocatableObject() const override;
 };
@@ -244,59 +354,71 @@ typedef ELFObjectFile<ELFType<support::big, false>> ELF32BEObjectFile;
 typedef ELFObjectFile<ELFType<support::big, true>> ELF64BEObjectFile;
 
 template <class ELFT>
-void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Symb) const {
-  Symb = toDRI(++toELFSymIter(Symb));
+void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
+  ++Sym.d.b;
 }
 
 template <class ELFT>
-std::error_code ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Symb,
-                                                   StringRef &Result) const {
-  ErrorOr<StringRef> Name = EF.getSymbolName(toELFSymIter(Symb));
-  if (!Name)
-    return Name.getError();
-  Result = *Name;
-  return std::error_code();
+ErrorOr<StringRef> ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym) const {
+  const Elf_Sym *ESym = toELFSymIter(Sym);
+  const Elf_Shdr *SymTableSec = *EF.getSection(Sym.d.a);
+  const Elf_Shdr *StringTableSec = *EF.getSection(SymTableSec->sh_link);
+  StringRef SymTable = *EF.getStringTable(StringTableSec);
+  return ESym->getName(SymTable);
 }
 
 template <class ELFT>
-uint64_t ELFObjectFile<ELFT>::getSectionFlags(SectionRef Sec) const {
-  DataRefImpl DRI = Sec.getRawDataRefImpl();
-  return toELFShdrIter(DRI)->sh_flags;
+uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
+  return toELFShdrIter(Sec)->sh_flags;
 }
 
 template <class ELFT>
-uint32_t ELFObjectFile<ELFT>::getSectionType(SectionRef Sec) const {
-  DataRefImpl DRI = Sec.getRawDataRefImpl();
-  return toELFShdrIter(DRI)->sh_type;
+uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
+  return toELFShdrIter(Sec)->sh_type;
 }
 
 template <class ELFT>
-std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
-                                                      uint64_t &Result) const {
+uint64_t ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb) const {
   const Elf_Sym *ESym = getSymbol(Symb);
-  switch (EF.getSymbolTableIndex(ESym)) {
+  switch (ESym->st_shndx) {
   case ELF::SHN_COMMON:
   case ELF::SHN_UNDEF:
-    Result = UnknownAddressOrSize;
-    return std::error_code();
+    return UnknownAddress;
   case ELF::SHN_ABS:
-    Result = ESym->st_value;
-    return std::error_code();
-  default:
-    break;
+    return ESym->st_value;
   }
 
   const Elf_Ehdr *Header = EF.getHeader();
-  Result = ESym->st_value;
+  uint64_t Ret = ESym->st_value;
 
   // Clear the ARM/Thumb or microMIPS indicator flag.
   if ((Header->e_machine == ELF::EM_ARM || Header->e_machine == ELF::EM_MIPS) &&
       ESym->getType() == ELF::STT_FUNC)
-    Result &= ~1;
+    Ret &= ~1;
+
+  return Ret;
+}
+
+template <class ELFT>
+std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
+                                                      uint64_t &Result) const {
+  Result = getSymbolValue(Symb);
+  const Elf_Sym *ESym = getSymbol(Symb);
+  switch (ESym->st_shndx) {
+  case ELF::SHN_COMMON:
+  case ELF::SHN_UNDEF:
+  case ELF::SHN_ABS:
+    return std::error_code();
+  }
+
+  const Elf_Ehdr *Header = EF.getHeader();
 
   if (Header->e_type == ELF::ET_REL) {
-    const typename ELFFile<ELFT>::Elf_Shdr * Section = EF.getSection(ESym);
-    if (Section != nullptr)
+    ErrorOr<const Elf_Shdr *> SectionOrErr = EF.getSection(ESym);
+    if (std::error_code EC = SectionOrErr.getError())
+      return EC;
+    const Elf_Shdr *Section = *SectionOrErr;
+    if (Section)
       Result += Section->sh_addr;
   }
 
@@ -305,59 +427,57 @@ std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
 
 template <class ELFT>
 uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
-  Elf_Sym_Iter Sym = toELFSymIter(Symb);
+  const Elf_Sym *Sym = toELFSymIter(Symb);
   if (Sym->st_shndx == ELF::SHN_COMMON)
     return Sym->st_value;
   return 0;
 }
 
 template <class ELFT>
-uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Symb) const {
+uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
+  return toELFSymIter(Sym)->st_size;
+}
+
+template <class ELFT>
+uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
   return toELFSymIter(Symb)->st_size;
 }
 
 template <class ELFT>
-std::error_code ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb,
-                                                    uint8_t &Result) const {
-  Result = toELFSymIter(Symb)->st_other;
-  return std::error_code();
+uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
+  return toELFSymIter(Symb)->st_other;
 }
 
 template <class ELFT>
-std::error_code
-ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb,
-                                   SymbolRef::Type &Result) const {
+uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
+  return toELFSymIter(Symb)->getType();
+}
+
+template <class ELFT>
+SymbolRef::Type ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
   const Elf_Sym *ESym = getSymbol(Symb);
 
   switch (ESym->getType()) {
   case ELF::STT_NOTYPE:
-    Result = SymbolRef::ST_Unknown;
-    break;
+    return SymbolRef::ST_Unknown;
   case ELF::STT_SECTION:
-    Result = SymbolRef::ST_Debug;
-    break;
+    return SymbolRef::ST_Debug;
   case ELF::STT_FILE:
-    Result = SymbolRef::ST_File;
-    break;
+    return SymbolRef::ST_File;
   case ELF::STT_FUNC:
-    Result = SymbolRef::ST_Function;
-    break;
+    return SymbolRef::ST_Function;
   case ELF::STT_OBJECT:
   case ELF::STT_COMMON:
   case ELF::STT_TLS:
-    Result = SymbolRef::ST_Data;
-    break;
+    return SymbolRef::ST_Data;
   default:
-    Result = SymbolRef::ST_Other;
-    break;
+    return SymbolRef::ST_Other;
   }
-  return std::error_code();
 }
 
 template <class ELFT>
-uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const {
-  Elf_Sym_Iter EIter = toELFSymIter(Symb);
-  const Elf_Sym *ESym = &*EIter;
+uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
+  const Elf_Sym *ESym = toELFSymIter(Sym);
 
   uint32_t Result = SymbolRef::SF_None;
 
@@ -371,14 +491,22 @@ uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const {
     Result |= SymbolRef::SF_Absolute;
 
   if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION ||
-      EIter == EF.begin_symbols() || EIter == EF.begin_dynamic_symbols())
+      ESym == EF.symbol_begin() || ESym == EF.dynamic_symbol_begin())
     Result |= SymbolRef::SF_FormatSpecific;
 
-  if (EF.getSymbolTableIndex(ESym) == ELF::SHN_UNDEF)
+  if (EF.getHeader()->e_machine == ELF::EM_ARM) {
+    if (ErrorOr<StringRef> NameOrErr = getSymbolName(Sym)) {
+      StringRef Name = *NameOrErr;
+      if (Name.startswith("$d") || Name.startswith("$t") ||
+          Name.startswith("$a"))
+        Result |= SymbolRef::SF_FormatSpecific;
+    }
+  }
+
+  if (ESym->st_shndx == ELF::SHN_UNDEF)
     Result |= SymbolRef::SF_Undefined;
 
-  if (ESym->getType() == ELF::STT_COMMON ||
-      EF.getSymbolTableIndex(ESym) == ELF::SHN_COMMON)
+  if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
     Result |= SymbolRef::SF_Common;
 
   if (isExportedToOtherDSO(ESym))
@@ -393,14 +521,17 @@ uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const {
 template <class ELFT>
 section_iterator
 ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
-  const Elf_Shdr *ESec = EF.getSection(ESym);
+  ErrorOr<const Elf_Shdr *> ESecOrErr = EF.getSection(ESym);
+  if (std::error_code EC = ESecOrErr.getError())
+    report_fatal_error(EC.message());
+
+  const Elf_Shdr *ESec = *ESecOrErr;
   if (!ESec)
     return section_end();
-  else {
-    DataRefImpl Sec;
-    Sec.p = reinterpret_cast<intptr_t>(ESec);
-    return section_iterator(SectionRef(Sec, this));
-  }
+
+  DataRefImpl Sec;
+  Sec.p = reinterpret_cast<intptr_t>(ESec);
+  return section_iterator(SectionRef(Sec, this));
 }
 
 template <class ELFT>
@@ -413,7 +544,8 @@ ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
 
 template <class ELFT>
 void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
-  Sec = toDRI(++toELFShdrIter(Sec));
+  const Elf_Shdr *ESec = toELFShdrIter(Sec);
+  Sec = toDRI(++ESec);
 }
 
 template <class ELFT>
@@ -440,7 +572,7 @@ template <class ELFT>
 std::error_code
 ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec,
                                         StringRef &Result) const {
-  Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
+  const Elf_Shdr *EShdr = toELFShdrIter(Sec);
   Result = StringRef((const char *)base() + EShdr->sh_offset, EShdr->sh_size);
   return std::error_code();
 }
@@ -457,14 +589,14 @@ bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
 
 template <class ELFT>
 bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
-  Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
+  const Elf_Shdr *EShdr = toELFShdrIter(Sec);
   return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
          EShdr->sh_type == ELF::SHT_PROGBITS;
 }
 
 template <class ELFT>
 bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
-  Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
+  const Elf_Shdr *EShdr = toELFShdrIter(Sec);
   return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
          EShdr->sh_type == ELF::SHT_NOBITS;
 }
@@ -475,38 +607,40 @@ bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
 }
 
 template <class ELFT>
-bool ELFObjectFile<ELFT>::sectionContainsSymbol(DataRefImpl Sec,
-                                                DataRefImpl Symb) const {
-  Elf_Sym_Iter ESym = toELFSymIter(Symb);
-
-  uintX_t Index = ESym->st_shndx;
-  bool Reserved = Index >= ELF::SHN_LORESERVE && Index <= ELF::SHN_HIRESERVE;
-
-  return !Reserved && (&*toELFShdrIter(Sec) == EF.getSection(ESym->st_shndx));
-}
-
-template <class ELFT>
 relocation_iterator
 ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
   DataRefImpl RelData;
-  uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
+  uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.section_begin());
   RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
   RelData.d.b = 0;
+
+  const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
+  if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
+    return relocation_iterator(RelocationRef(RelData, this));
+
+  const Elf_Shdr *RelSec = getRelSection(RelData);
+  ErrorOr<const Elf_Shdr *> SymSecOrErr = EF.getSection(RelSec->sh_link);
+  if (std::error_code EC = SymSecOrErr.getError())
+    report_fatal_error(EC.message());
+  const Elf_Shdr *SymSec = *SymSecOrErr;
+  uint32_t SymSecType = SymSec->sh_type;
+  if (SymSecType != ELF::SHT_SYMTAB && SymSecType != ELF::SHT_DYNSYM)
+    report_fatal_error("Invalid symbol table section type!");
+  if (SymSecType == ELF::SHT_DYNSYM)
+    RelData.d.b = 1;
+
   return relocation_iterator(RelocationRef(RelData, this));
 }
 
 template <class ELFT>
 relocation_iterator
 ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
-  DataRefImpl RelData;
-  uintptr_t SHT = reinterpret_cast<uintptr_t>(EF.begin_sections().get());
   const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
-  RelData.d.a = (Sec.p - SHT) / EF.getHeader()->e_shentsize;
+  relocation_iterator Begin = section_rel_begin(Sec);
   if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
-    RelData.d.b = 0;
-  else
-    RelData.d.b = S->sh_size / S->sh_entsize;
-
+    return Begin;
+  DataRefImpl RelData = Begin->getRawDataRefImpl();
+  RelData.d.b += (S->sh_size / S->sh_entsize) << 1;
   return relocation_iterator(RelocationRef(RelData, this));
 }
 
@@ -516,19 +650,21 @@ ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
   if (EF.getHeader()->e_type != ELF::ET_REL)
     return section_end();
 
-  Elf_Shdr_Iter EShdr = toELFShdrIter(Sec);
+  const Elf_Shdr *EShdr = toELFShdrIter(Sec);
   uintX_t Type = EShdr->sh_type;
   if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA)
     return section_end();
 
-  const Elf_Shdr *R = EF.getSection(EShdr->sh_info);
-  return section_iterator(SectionRef(toDRI(R), this));
+  ErrorOr<const Elf_Shdr *> R = EF.getSection(EShdr->sh_info);
+  if (std::error_code EC = R.getError())
+    report_fatal_error(EC.message());
+  return section_iterator(SectionRef(toDRI(*R), this));
 }
 
 // Relocations
 template <class ELFT>
 void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
-  ++Rel.d.b;
+  Rel.d.b += 2;
 }
 
 template <class ELFT>
@@ -536,96 +672,62 @@ symbol_iterator
 ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
   uint32_t symbolIdx;
   const Elf_Shdr *sec = getRelSection(Rel);
-  switch (sec->sh_type) {
-  default:
-    report_fatal_error("Invalid section type in Rel!");
-  case ELF::SHT_REL: {
+  if (sec->sh_type == ELF::SHT_REL)
     symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
-    break;
-  }
-  case ELF::SHT_RELA: {
+  else
     symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
-    break;
-  }
-  }
   if (!symbolIdx)
     return symbol_end();
 
-  const Elf_Shdr *SymSec = EF.getSection(sec->sh_link);
-
+  bool IsDyn = Rel.d.b & 1;
   DataRefImpl SymbolData;
-  switch (SymSec->sh_type) {
-  default:
-    report_fatal_error("Invalid symbol table section type!");
-  case ELF::SHT_SYMTAB:
-    SymbolData = toDRI(EF.begin_symbols() + symbolIdx);
-    break;
-  case ELF::SHT_DYNSYM:
-    SymbolData = toDRI(EF.begin_dynamic_symbols() + symbolIdx);
-    break;
-  }
-
+  if (IsDyn)
+    SymbolData = toDRI(EF.getDotDynSymSec(), symbolIdx);
+  else
+    SymbolData = toDRI(EF.getDotSymtabSec(), symbolIdx);
   return symbol_iterator(SymbolRef(SymbolData, this));
 }
 
 template <class ELFT>
-std::error_code
-ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
-                                          uint64_t &Result) const {
+ErrorOr<uint64_t>
+ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel) const {
   uint64_t ROffset = getROffset(Rel);
   const Elf_Ehdr *Header = EF.getHeader();
 
   if (Header->e_type == ELF::ET_REL) {
     const Elf_Shdr *RelocationSec = getRelSection(Rel);
-    const Elf_Shdr *RelocatedSec = EF.getSection(RelocationSec->sh_info);
-    Result = ROffset + RelocatedSec->sh_addr;
-  } else {
-    Result = ROffset;
+    ErrorOr<const Elf_Shdr *> RelocatedSec =
+        EF.getSection(RelocationSec->sh_info);
+    if (std::error_code EC = RelocatedSec.getError())
+      return EC;
+    return ROffset + (*RelocatedSec)->sh_addr;
   }
-
-  return std::error_code();
+  return ROffset;
 }
 
 template <class ELFT>
-std::error_code
-ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel,
-                                         uint64_t &Result) const {
+uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
   assert(EF.getHeader()->e_type == ELF::ET_REL &&
          "Only relocatable object files have relocation offsets");
-  Result = getROffset(Rel);
-  return std::error_code();
+  return getROffset(Rel);
 }
 
 template <class ELFT>
 uint64_t ELFObjectFile<ELFT>::getROffset(DataRefImpl Rel) const {
   const Elf_Shdr *sec = getRelSection(Rel);
-  switch (sec->sh_type) {
-  default:
-    report_fatal_error("Invalid section type in Rel!");
-  case ELF::SHT_REL:
+  if (sec->sh_type == ELF::SHT_REL)
     return getRel(Rel)->r_offset;
-  case ELF::SHT_RELA:
-    return getRela(Rel)->r_offset;
-  }
+
+  return getRela(Rel)->r_offset;
 }
 
 template <class ELFT>
-std::error_code ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel,
-                                                       uint64_t &Result) const {
+uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
   const Elf_Shdr *sec = getRelSection(Rel);
-  switch (sec->sh_type) {
-  default:
-    report_fatal_error("Invalid section type in Rel!");
-  case ELF::SHT_REL: {
-    Result = getRel(Rel)->getType(EF.isMips64EL());
-    break;
-  }
-  case ELF::SHT_RELA: {
-    Result = getRela(Rel)->getType(EF.isMips64EL());
-    break;
-  }
-  }
-  return std::error_code();
+  if (sec->sh_type == ELF::SHT_REL)
+    return getRel(Rel)->getType(EF.isMips64EL());
+  else
+    return getRela(Rel)->getType(EF.isMips64EL());
 }
 
 template <class ELFT>
@@ -634,25 +736,10 @@ StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
 }
 
 template <class ELFT>
-std::error_code ELFObjectFile<ELFT>::getRelocationTypeName(
+void ELFObjectFile<ELFT>::getRelocationTypeName(
     DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
-  const Elf_Shdr *sec = getRelSection(Rel);
-  uint32_t type;
-  switch (sec->sh_type) {
-  default:
-    return object_error::parse_failed;
-  case ELF::SHT_REL: {
-    type = getRel(Rel)->getType(EF.isMips64EL());
-    break;
-  }
-  case ELF::SHT_RELA: {
-    type = getRela(Rel)->getType(EF.isMips64EL());
-    break;
-  }
-  }
-
+  uint32_t type = getRelocationType(Rel);
   EF.getRelocationTypeName(type, Result);
-  return std::error_code();
 }
 
 template <class ELFT>
@@ -664,11 +751,6 @@ ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
 }
 
 template <class ELFT>
-bool ELFObjectFile<ELFT>::hasRelocationAddend(DataRefImpl Rel) const {
-  return getRelSection(Rel)->sh_type == ELF::SHT_RELA;
-}
-
-template <class ELFT>
 const typename ELFFile<ELFT>::Elf_Sym *
 ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
   return &*toELFSymIter(Symb);
@@ -677,13 +759,15 @@ ELFObjectFile<ELFT>::getSymbol(DataRefImpl Symb) const {
 template <class ELFT>
 const typename ELFObjectFile<ELFT>::Elf_Rel *
 ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
-  return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
+  assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
+  return EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b >> 1);
 }
 
 template <class ELFT>
 const typename ELFObjectFile<ELFT>::Elf_Rela *
 ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
-  return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
+  assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
+  return EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b >> 1);
 }
 
 template <class ELFT>
@@ -697,38 +781,46 @@ ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, std::error_code &EC)
 
 template <class ELFT>
 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin_impl() const {
-  return basic_symbol_iterator(SymbolRef(toDRI(EF.begin_symbols()), this));
+  DataRefImpl Sym = toDRI(EF.getDotSymtabSec(), 0);
+  return basic_symbol_iterator(SymbolRef(Sym, this));
 }
 
 template <class ELFT>
 basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end_impl() const {
-  return basic_symbol_iterator(SymbolRef(toDRI(EF.end_symbols()), this));
+  const Elf_Shdr *SymTab = EF.getDotSymtabSec();
+  if (!SymTab)
+    return symbol_begin_impl();
+  DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
+  return basic_symbol_iterator(SymbolRef(Sym, this));
 }
 
 template <class ELFT>
-symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
-  return symbol_iterator(SymbolRef(toDRI(EF.begin_dynamic_symbols()), this));
+elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
+  DataRefImpl Sym = toDRI(EF.getDotDynSymSec(), 0);
+  return symbol_iterator(SymbolRef(Sym, this));
 }
 
 template <class ELFT>
-symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
-  return symbol_iterator(SymbolRef(toDRI(EF.end_dynamic_symbols()), this));
+elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
+  const Elf_Shdr *SymTab = EF.getDotDynSymSec();
+  DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
+  return basic_symbol_iterator(SymbolRef(Sym, this));
 }
 
 template <class ELFT>
 section_iterator ELFObjectFile<ELFT>::section_begin() const {
-  return section_iterator(SectionRef(toDRI(EF.begin_sections()), this));
+  return section_iterator(SectionRef(toDRI(EF.section_begin()), this));
 }
 
 template <class ELFT>
 section_iterator ELFObjectFile<ELFT>::section_end() const {
-  return section_iterator(SectionRef(toDRI(EF.end_sections()), this));
+  return section_iterator(SectionRef(toDRI(EF.section_end()), this));
 }
 
 template <class ELFT>
 StringRef ELFObjectFile<ELFT>::getLoadName() const {
-  Elf_Dyn_Iter DI = EF.begin_dynamic_table();
-  Elf_Dyn_Iter DE = EF.end_dynamic_table();
+  Elf_Dyn_Iter DI = EF.dynamic_table_begin();
+  Elf_Dyn_Iter DE = EF.dynamic_table_end();
 
   while (DI != DE && DI->getTag() != ELF::DT_SONAME)
     ++DI;
@@ -834,21 +926,16 @@ unsigned ELFObjectFile<ELFT>::getArch() const {
 }
 
 template <class ELFT>
-std::pair<symbol_iterator, symbol_iterator>
-ELFObjectFile<ELFT>::getELFDynamicSymbolIterators() const {
-  return std::make_pair(dynamic_symbol_begin(), dynamic_symbol_end());
+ELFObjectFileBase::elf_symbol_iterator_range
+ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
+  return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
 }
 
 template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
   return EF.getHeader()->e_type == ELF::ET_REL;
 }
 
-inline std::pair<symbol_iterator, symbol_iterator>
-getELFDynamicSymbolIterators(const SymbolicFile *Obj) {
-  return cast<ELFObjectFileBase>(Obj)->getELFDynamicSymbolIterators();
 }
-
-} // namespace object
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Object/ELFTypes.h b/include/llvm/Object/ELFTypes.h
index 2eda0c179f10..63e13909ae5c 100644
--- a/include/llvm/Object/ELFTypes.h
+++ b/include/llvm/Object/ELFTypes.h
@@ -10,9 +10,11 @@
 #ifndef LLVM_OBJECT_ELFTYPES_H
 #define LLVM_OBJECT_ELFTYPES_H
 
+#include "llvm/Object/Error.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/ELF.h"
 #include "llvm/Support/Endian.h"
+#include "llvm/Support/ErrorOr.h"
 
 namespace llvm {
 namespace object {
@@ -24,6 +26,11 @@ template <endianness target_endianness, bool is64Bits> struct ELFType {
   static const bool Is64Bits = is64Bits;
 };
 
+typedef ELFType<support::little, false> ELF32LE;
+typedef ELFType<support::big, false> ELF32BE;
+typedef ELFType<support::little, true> ELF64LE;
+typedef ELFType<support::big, true> ELF64BE;
+
 // Use an alignment of 2 for the typedefs since that is the worst case for
 // ELF files in archives.
 
@@ -197,8 +204,21 @@ struct Elf_Sym_Impl : Elf_Sym_Base<ELFT> {
     return st_shndx >= ELF::SHN_LORESERVE;
   }
   bool isUndefined() const { return st_shndx == ELF::SHN_UNDEF; }
+  bool isExternal() const {
+    return getBinding() != ELF::STB_LOCAL;
+  }
+
+  ErrorOr<StringRef> getName(StringRef StrTab) const;
 };
 
+template <class ELFT>
+ErrorOr<StringRef> Elf_Sym_Impl<ELFT>::getName(StringRef StrTab) const {
+  uint32_t Offset = this->st_name;
+  if (Offset >= StrTab.size())
+    return object_error::parse_failed;
+  return StringRef(StrTab.data() + Offset);
+}
+
 /// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section
 /// (.gnu.version). This structure is identical for ELF32 and ELF64.
 template <class ELFT>
@@ -293,14 +313,14 @@ struct Elf_Dyn_Impl : Elf_Dyn_Base<ELFT> {
   using Elf_Dyn_Base<ELFT>::d_un;
   int64_t getTag() const { return d_tag; }
   uint64_t getVal() const { return d_un.d_val; }
-  uint64_t getPtr() const { return d_un.ptr; }
+  uint64_t getPtr() const { return d_un.d_ptr; }
 };
 
 // Elf_Rel: Elf Relocation
-template <class ELFT, bool isRela> struct Elf_Rel_Base;
+template <class ELFT, bool isRela> struct Elf_Rel_Impl;
 
 template <endianness TargetEndianness>
-struct Elf_Rel_Base<ELFType<TargetEndianness, false>, false> {
+struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> {
   LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
   Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
   Elf_Word r_info;   // Symbol table index and type of relocation to apply
@@ -313,64 +333,46 @@ struct Elf_Rel_Base<ELFType<TargetEndianness, false>, false> {
     assert(!IsMips64EL);
     r_info = R;
   }
-};
-
-template <endianness TargetEndianness>
-struct Elf_Rel_Base<ELFType<TargetEndianness, true>, false> {
-  LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
-  Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
-  Elf_Xword r_info;  // Symbol table index and type of relocation to apply
 
-  uint64_t getRInfo(bool isMips64EL) const {
-    uint64_t t = r_info;
-    if (!isMips64EL)
-      return t;
-    // Mips64 little endian has a "special" encoding of r_info. Instead of one
-    // 64 bit little endian number, it is a little endian 32 bit number followed
-    // by a 32 bit big endian number.
-    return (t << 32) | ((t >> 8) & 0xff000000) | ((t >> 24) & 0x00ff0000) |
-           ((t >> 40) & 0x0000ff00) | ((t >> 56) & 0x000000ff);
+  // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
+  // and ELF32_R_INFO macros defined in the ELF specification:
+  uint32_t getSymbol(bool isMips64EL) const {
+    return this->getRInfo(isMips64EL) >> 8;
   }
-  void setRInfo(uint64_t R, bool IsMips64EL) {
-    if (IsMips64EL)
-      r_info = (R >> 32) | ((R & 0xff000000) << 8) | ((R & 0x00ff0000) << 24) |
-               ((R & 0x0000ff00) << 40) | ((R & 0x000000ff) << 56);
-    else
-      r_info = R;
+  unsigned char getType(bool isMips64EL) const {
+    return (unsigned char)(this->getRInfo(isMips64EL) & 0x0ff);
+  }
+  void setSymbol(uint32_t s, bool IsMips64EL) {
+    setSymbolAndType(s, getType(), IsMips64EL);
+  }
+  void setType(unsigned char t, bool IsMips64EL) {
+    setSymbolAndType(getSymbol(), t, IsMips64EL);
+  }
+  void setSymbolAndType(uint32_t s, unsigned char t, bool IsMips64EL) {
+    this->setRInfo((s << 8) + t, IsMips64EL);
   }
 };
 
 template <endianness TargetEndianness>
-struct Elf_Rel_Base<ELFType<TargetEndianness, false>, true> {
+struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, true>
+    : public Elf_Rel_Impl<ELFType<TargetEndianness, false>, false> {
   LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
-  Elf_Addr r_offset;  // Location (file byte offset, or program virtual addr)
-  Elf_Word r_info;    // Symbol table index and type of relocation to apply
   Elf_Sword r_addend; // Compute value for relocatable field by adding this
-
-  uint32_t getRInfo(bool isMips64EL) const {
-    assert(!isMips64EL);
-    return r_info;
-  }
-  void setRInfo(uint32_t R, bool IsMips64EL) {
-    assert(!IsMips64EL);
-    r_info = R;
-  }
 };
 
 template <endianness TargetEndianness>
-struct Elf_Rel_Base<ELFType<TargetEndianness, true>, true> {
+struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> {
   LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
-  Elf_Addr r_offset;   // Location (file byte offset, or program virtual addr)
-  Elf_Xword r_info;    // Symbol table index and type of relocation to apply
-  Elf_Sxword r_addend; // Compute value for relocatable field by adding this.
+  Elf_Addr r_offset; // Location (file byte offset, or program virtual addr)
+  Elf_Xword r_info;  // Symbol table index and type of relocation to apply
 
   uint64_t getRInfo(bool isMips64EL) const {
-    // Mips64 little endian has a "special" encoding of r_info. Instead of one
-    // 64 bit little endian number, it is a little endian 32 bit number followed
-    // by a 32 bit big endian number.
     uint64_t t = r_info;
     if (!isMips64EL)
       return t;
+    // Mips64 little endian has a "special" encoding of r_info. Instead of one
+    // 64 bit little endian number, it is a little endian 32 bit number followed
+    // by a 32 bit big endian number.
     return (t << 32) | ((t >> 8) & 0xff000000) | ((t >> 24) & 0x00ff0000) |
            ((t >> 40) & 0x0000ff00) | ((t >> 56) & 0x000000ff);
   }
@@ -381,14 +383,6 @@ struct Elf_Rel_Base<ELFType<TargetEndianness, true>, true> {
     else
       r_info = R;
   }
-};
-
-template <class ELFT, bool isRela> struct Elf_Rel_Impl;
-
-template <endianness TargetEndianness, bool isRela>
-struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, isRela>
-    : Elf_Rel_Base<ELFType<TargetEndianness, true>, isRela> {
-  LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
 
   // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
   // and ELF64_R_INFO macros defined in the ELF specification:
@@ -409,28 +403,11 @@ struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, isRela>
   }
 };
 
-template <endianness TargetEndianness, bool isRela>
-struct Elf_Rel_Impl<ELFType<TargetEndianness, false>, isRela>
-    : Elf_Rel_Base<ELFType<TargetEndianness, false>, isRela> {
-  LLVM_ELF_IMPORT_TYPES(TargetEndianness, false)
-
-  // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
-  // and ELF32_R_INFO macros defined in the ELF specification:
-  uint32_t getSymbol(bool isMips64EL) const {
-    return this->getRInfo(isMips64EL) >> 8;
-  }
-  unsigned char getType(bool isMips64EL) const {
-    return (unsigned char)(this->getRInfo(isMips64EL) & 0x0ff);
-  }
-  void setSymbol(uint32_t s, bool IsMips64EL) {
-    setSymbolAndType(s, getType(), IsMips64EL);
-  }
-  void setType(unsigned char t, bool IsMips64EL) {
-    setSymbolAndType(getSymbol(), t, IsMips64EL);
-  }
-  void setSymbolAndType(uint32_t s, unsigned char t, bool IsMips64EL) {
-    this->setRInfo((s << 8) + t, IsMips64EL);
-  }
+template <endianness TargetEndianness>
+struct Elf_Rel_Impl<ELFType<TargetEndianness, true>, true>
+    : public Elf_Rel_Impl<ELFType<TargetEndianness, true>, false> {
+  LLVM_ELF_IMPORT_TYPES(TargetEndianness, true)
+  Elf_Sxword r_addend; // Compute value for relocatable field by adding this.
 };
 
 template <class ELFT>
diff --git a/include/llvm/Object/Error.h b/include/llvm/Object/Error.h
index c9db1b80b916..aa320bb51a46 100644
--- a/include/llvm/Object/Error.h
+++ b/include/llvm/Object/Error.h
@@ -27,6 +27,8 @@ enum class object_error {
   invalid_file_type,
   parse_failed,
   unexpected_eof,
+  string_table_non_null_end,
+  invalid_section_index,
   bitcode_section_not_found,
   macho_small_load_command,
   macho_load_segment_too_many_sections,
diff --git a/include/llvm/Object/IRObjectFile.h b/include/llvm/Object/IRObjectFile.h
index f7135706cc4e..ef655287c34c 100644
--- a/include/llvm/Object/IRObjectFile.h
+++ b/include/llvm/Object/IRObjectFile.h
@@ -68,7 +68,7 @@ public:
   static ErrorOr<std::unique_ptr<IRObjectFile>> create(MemoryBufferRef Object,
                                                        LLVMContext &Context);
 };
-} // namespace object
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Object/MachO.h b/include/llvm/Object/MachO.h
index 4350a759f153..f4edfd057303 100644
--- a/include/llvm/Object/MachO.h
+++ b/include/llvm/Object/MachO.h
@@ -197,8 +197,9 @@ public:
                   std::error_code &EC);
 
   void moveSymbolNext(DataRefImpl &Symb) const override;
-  std::error_code getSymbolName(DataRefImpl Symb,
-                                StringRef &Res) const override;
+
+  uint64_t getNValue(DataRefImpl Sym) const;
+  ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const override;
 
   // MachO specific.
   std::error_code getIndirectName(DataRefImpl Symb, StringRef &Res) const;
@@ -206,13 +207,15 @@ public:
 
   std::error_code getSymbolAddress(DataRefImpl Symb,
                                    uint64_t &Res) const override;
+  uint64_t getSymbolValue(DataRefImpl Symb) const override;
   uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
-  uint64_t getSymbolSize(DataRefImpl Symb) const override;
-  std::error_code getSymbolType(DataRefImpl Symb,
-                                SymbolRef::Type &Res) const override;
+  uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
+  SymbolRef::Type getSymbolType(DataRefImpl Symb) const override;
   uint32_t getSymbolFlags(DataRefImpl Symb) const override;
   std::error_code getSymbolSection(DataRefImpl Symb,
                                    section_iterator &Res) const override;
+  unsigned getSymbolSectionID(SymbolRef Symb) const;
+  unsigned getSectionID(SectionRef Sec) const;
 
   void moveSectionNext(DataRefImpl &Sec) const override;
   std::error_code getSectionName(DataRefImpl Sec,
@@ -226,24 +229,17 @@ public:
   bool isSectionData(DataRefImpl Sec) const override;
   bool isSectionBSS(DataRefImpl Sec) const override;
   bool isSectionVirtual(DataRefImpl Sec) const override;
-  bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override;
   relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
   relocation_iterator section_rel_end(DataRefImpl Sec) const override;
 
   void moveRelocationNext(DataRefImpl &Rel) const override;
-  std::error_code getRelocationAddress(DataRefImpl Rel,
-                                       uint64_t &Res) const override;
-  std::error_code getRelocationOffset(DataRefImpl Rel,
-                                      uint64_t &Res) const override;
+  ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const override;
+  uint64_t getRelocationOffset(DataRefImpl Rel) const override;
   symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
   section_iterator getRelocationSection(DataRefImpl Rel) const;
-  std::error_code getRelocationType(DataRefImpl Rel,
-                                    uint64_t &Res) const override;
-  std::error_code
-  getRelocationTypeName(DataRefImpl Rel,
-                        SmallVectorImpl<char> &Result) const override;
-  std::error_code getRelocationHidden(DataRefImpl Rel,
-                                      bool &Result) const override;
+  uint64_t getRelocationType(DataRefImpl Rel) const override;
+  void getRelocationTypeName(DataRefImpl Rel,
+                             SmallVectorImpl<char> &Result) const override;
   uint8_t getRelocationLength(DataRefImpl Rel) const;
 
   // MachO specific.
@@ -503,8 +499,8 @@ inline const ObjectFile *DiceRef::getObjectFile() const {
   return OwningObject;
 }
 
-} // namespace object
-} // namespace llvm
+}
+}
 
 #endif
 
diff --git a/include/llvm/Object/MachOUniversal.h b/include/llvm/Object/MachOUniversal.h
index ebc8b906691a..a11d381a700a 100644
--- a/include/llvm/Object/MachOUniversal.h
+++ b/include/llvm/Object/MachOUniversal.h
@@ -109,10 +109,10 @@ public:
   }
 
   ErrorOr<std::unique_ptr<MachOObjectFile>>
-  getObjectForArch(Triple::ArchType Arch) const;
+  getObjectForArch(StringRef ArchName) const;
 };
 
-} // namespace object
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Object/ObjectFile.h b/include/llvm/Object/ObjectFile.h
index e00fe0ed0a2a..62eab1066be5 100644
--- a/include/llvm/Object/ObjectFile.h
+++ b/include/llvm/Object/ObjectFile.h
@@ -35,8 +35,8 @@ class symbol_iterator;
 class SectionRef;
 typedef content_iterator<SectionRef> section_iterator;
 
-/// RelocationRef - This is a value type class that represents a single
-/// relocation in the list of relocations in the object file.
+/// This is a value type class that represents a single relocation in the list
+/// of relocations in the object file.
 class RelocationRef {
   DataRefImpl RelocationPimpl;
   const ObjectFile *OwningObject;
@@ -50,29 +50,23 @@ public:
 
   void moveNext();
 
-  std::error_code getAddress(uint64_t &Result) const;
-  std::error_code getOffset(uint64_t &Result) const;
+  ErrorOr<uint64_t> getAddress() const;
+  uint64_t getOffset() const;
   symbol_iterator getSymbol() const;
-  std::error_code getType(uint64_t &Result) const;
-
-  /// @brief Indicates whether this relocation should hidden when listing
-  /// relocations, usually because it is the trailing part of a multipart
-  /// relocation that will be printed as part of the leading relocation.
-  std::error_code getHidden(bool &Result) const;
+  uint64_t getType() const;
 
   /// @brief Get a string that represents the type of this relocation.
   ///
   /// This is for display purposes only.
-  std::error_code getTypeName(SmallVectorImpl<char> &Result) const;
-
+  void getTypeName(SmallVectorImpl<char> &Result) const;
 
   DataRefImpl getRawDataRefImpl() const;
-  const ObjectFile *getObjectFile() const;
+  const ObjectFile *getObject() const;
 };
 typedef content_iterator<RelocationRef> relocation_iterator;
 
-/// SectionRef - This is a value type class that represents a single section in
-/// the list of sections in the object file.
+/// This is a value type class that represents a single section in the list of
+/// sections in the object file.
 class SectionRef {
   friend class SymbolRef;
   DataRefImpl SectionPimpl;
@@ -116,8 +110,8 @@ public:
   const ObjectFile *getObject() const;
 };
 
-/// SymbolRef - This is a value type class that represents a single symbol in
-/// the list of symbols in the object file.
+/// This is a value type class that represents a single symbol in the list of
+/// symbols in the object file.
 class SymbolRef : public BasicSymbolRef {
   friend class SectionRef;
 
@@ -134,16 +128,23 @@ public:
   };
 
   SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);
+  SymbolRef(const BasicSymbolRef &B) : BasicSymbolRef(B) {
+    assert(isa<ObjectFile>(BasicSymbolRef::getObject()));
+  }
 
-  std::error_code getName(StringRef &Result) const;
+  ErrorOr<StringRef> getName() const;
   /// Returns the symbol virtual address (i.e. address at which it will be
   /// mapped).
   std::error_code getAddress(uint64_t &Result) const;
+
+  /// Return the value of the symbol depending on the object this can be an
+  /// offset or a virtual address.
+  uint64_t getValue() const;
+
   /// @brief Get the alignment of this symbol as the actual value (not log 2).
   uint32_t getAlignment() const;
-  uint64_t getSize() const;
-  std::error_code getType(SymbolRef::Type &Result) const;
-  std::error_code getOther(uint8_t &Result) const;
+  uint64_t getCommonSize() const;
+  SymbolRef::Type getType() const;
 
   /// @brief Get section this symbol is defined in reference to. Result is
   /// end_sections() if it is undefined or is an absolute symbol.
@@ -170,9 +171,9 @@ public:
   }
 };
 
-/// ObjectFile - This class is the base class for all object file types.
-/// Concrete instances of this object are created by createObjectFile, which
-/// figures out which type to create.
+/// This class is the base class for all object file types. Concrete instances
+/// of this object are created by createObjectFile, which figures out which type
+/// to create.
 class ObjectFile : public SymbolicFile {
   virtual void anchor();
   ObjectFile() = delete;
@@ -194,22 +195,17 @@ protected:
   // Implementations assume that the DataRefImpl is valid and has not been
   // modified externally. It's UB otherwise.
   friend class SymbolRef;
-  virtual std::error_code getSymbolName(DataRefImpl Symb,
-                                        StringRef &Res) const = 0;
+  virtual ErrorOr<StringRef> getSymbolName(DataRefImpl Symb) const = 0;
   std::error_code printSymbolName(raw_ostream &OS,
                                   DataRefImpl Symb) const override;
   virtual std::error_code getSymbolAddress(DataRefImpl Symb,
                                            uint64_t &Res) const = 0;
+  virtual uint64_t getSymbolValue(DataRefImpl Symb) const = 0;
   virtual uint32_t getSymbolAlignment(DataRefImpl Symb) const;
-  virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0;
-  virtual std::error_code getSymbolType(DataRefImpl Symb,
-                                        SymbolRef::Type &Res) const = 0;
+  virtual uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const = 0;
+  virtual SymbolRef::Type getSymbolType(DataRefImpl Symb) const = 0;
   virtual std::error_code getSymbolSection(DataRefImpl Symb,
                                            section_iterator &Res) const = 0;
-  virtual std::error_code getSymbolOther(DataRefImpl Symb,
-                                         uint8_t &Res) const {
-    return object_error::invalid_file_type;
-  }
 
   // Same as above for SectionRef.
   friend class SectionRef;
@@ -226,8 +222,6 @@ protected:
   virtual bool isSectionBSS(DataRefImpl Sec) const = 0;
   // A section is 'virtual' if its contents aren't present in the object image.
   virtual bool isSectionVirtual(DataRefImpl Sec) const = 0;
-  virtual bool sectionContainsSymbol(DataRefImpl Sec,
-                                     DataRefImpl Symb) const = 0;
   virtual relocation_iterator section_rel_begin(DataRefImpl Sec) const = 0;
   virtual relocation_iterator section_rel_end(DataRefImpl Sec) const = 0;
   virtual section_iterator getRelocatedSection(DataRefImpl Sec) const;
@@ -235,23 +229,19 @@ protected:
   // Same as above for RelocationRef.
   friend class RelocationRef;
   virtual void moveRelocationNext(DataRefImpl &Rel) const = 0;
-  virtual std::error_code getRelocationAddress(DataRefImpl Rel,
-                                               uint64_t &Res) const = 0;
-  virtual std::error_code getRelocationOffset(DataRefImpl Rel,
-                                              uint64_t &Res) const = 0;
+  virtual ErrorOr<uint64_t> getRelocationAddress(DataRefImpl Rel) const = 0;
+  virtual uint64_t getRelocationOffset(DataRefImpl Rel) const = 0;
   virtual symbol_iterator getRelocationSymbol(DataRefImpl Rel) const = 0;
-  virtual std::error_code getRelocationType(DataRefImpl Rel,
-                                            uint64_t &Res) const = 0;
-  virtual std::error_code
-  getRelocationTypeName(DataRefImpl Rel,
-                        SmallVectorImpl<char> &Result) const = 0;
-  virtual std::error_code getRelocationHidden(DataRefImpl Rel,
-                                              bool &Result) const {
-    Result = false;
-    return std::error_code();
-  }
+  virtual uint64_t getRelocationType(DataRefImpl Rel) const = 0;
+  virtual void getRelocationTypeName(DataRefImpl Rel,
+                                     SmallVectorImpl<char> &Result) const = 0;
 
 public:
+  uint64_t getCommonSymbolSize(DataRefImpl Symb) const {
+    assert(getSymbolFlags(Symb) & SymbolRef::SF_Common);
+    return getCommonSymbolSizeImpl(Symb);
+  }
+
   typedef iterator_range<symbol_iterator> symbol_iterator_range;
   symbol_iterator_range symbols() const {
     return symbol_iterator_range(symbol_begin(), symbol_end());
@@ -314,32 +304,32 @@ public:
 inline SymbolRef::SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner)
     : BasicSymbolRef(SymbolP, Owner) {}
 
-inline std::error_code SymbolRef::getName(StringRef &Result) const {
-  return getObject()->getSymbolName(getRawDataRefImpl(), Result);
+inline ErrorOr<StringRef> SymbolRef::getName() const {
+  return getObject()->getSymbolName(getRawDataRefImpl());
 }
 
 inline std::error_code SymbolRef::getAddress(uint64_t &Result) const {
   return getObject()->getSymbolAddress(getRawDataRefImpl(), Result);
 }
 
+inline uint64_t SymbolRef::getValue() const {
+  return getObject()->getSymbolValue(getRawDataRefImpl());
+}
+
 inline uint32_t SymbolRef::getAlignment() const {
   return getObject()->getSymbolAlignment(getRawDataRefImpl());
 }
 
-inline uint64_t SymbolRef::getSize() const {
-  return getObject()->getSymbolSize(getRawDataRefImpl());
+inline uint64_t SymbolRef::getCommonSize() const {
+  return getObject()->getCommonSymbolSize(getRawDataRefImpl());
 }
 
 inline std::error_code SymbolRef::getSection(section_iterator &Result) const {
   return getObject()->getSymbolSection(getRawDataRefImpl(), Result);
 }
 
-inline std::error_code SymbolRef::getType(SymbolRef::Type &Result) const {
-  return getObject()->getSymbolType(getRawDataRefImpl(), Result);
-}
-
-inline std::error_code SymbolRef::getOther(uint8_t &Result) const {
-  return getObject()->getSymbolOther(getRawDataRefImpl(), Result);
+inline SymbolRef::Type SymbolRef::getType() const {
+  return getObject()->getSymbolType(getRawDataRefImpl());
 }
 
 inline const ObjectFile *SymbolRef::getObject() const {
@@ -406,11 +396,6 @@ inline bool SectionRef::isVirtual() const {
   return OwningObject->isSectionVirtual(SectionPimpl);
 }
 
-inline bool SectionRef::containsSymbol(SymbolRef S) const {
-  return OwningObject->sectionContainsSymbol(SectionPimpl,
-                                             S.getRawDataRefImpl());
-}
-
 inline relocation_iterator SectionRef::relocation_begin() const {
   return OwningObject->section_rel_begin(SectionPimpl);
 }
@@ -445,36 +430,31 @@ inline void RelocationRef::moveNext() {
   return OwningObject->moveRelocationNext(RelocationPimpl);
 }
 
-inline std::error_code RelocationRef::getAddress(uint64_t &Result) const {
-  return OwningObject->getRelocationAddress(RelocationPimpl, Result);
+inline ErrorOr<uint64_t> RelocationRef::getAddress() const {
+  return OwningObject->getRelocationAddress(RelocationPimpl);
 }
 
-inline std::error_code RelocationRef::getOffset(uint64_t &Result) const {
-  return OwningObject->getRelocationOffset(RelocationPimpl, Result);
+inline uint64_t RelocationRef::getOffset() const {
+  return OwningObject->getRelocationOffset(RelocationPimpl);
 }
 
 inline symbol_iterator RelocationRef::getSymbol() const {
   return OwningObject->getRelocationSymbol(RelocationPimpl);
 }
 
-inline std::error_code RelocationRef::getType(uint64_t &Result) const {
-  return OwningObject->getRelocationType(RelocationPimpl, Result);
+inline uint64_t RelocationRef::getType() const {
+  return OwningObject->getRelocationType(RelocationPimpl);
 }
 
-inline std::error_code
-RelocationRef::getTypeName(SmallVectorImpl<char> &Result) const {
+inline void RelocationRef::getTypeName(SmallVectorImpl<char> &Result) const {
   return OwningObject->getRelocationTypeName(RelocationPimpl, Result);
 }
 
-inline std::error_code RelocationRef::getHidden(bool &Result) const {
-  return OwningObject->getRelocationHidden(RelocationPimpl, Result);
-}
-
 inline DataRefImpl RelocationRef::getRawDataRefImpl() const {
   return RelocationPimpl;
 }
 
-inline const ObjectFile *RelocationRef::getObjectFile() const {
+inline const ObjectFile *RelocationRef::getObject() const {
   return OwningObject;
 }
 
diff --git a/include/llvm/Object/RelocVisitor.h b/include/llvm/Object/RelocVisitor.h
index f80ee0a8a7a2..950e2ed0e338 100644
--- a/include/llvm/Object/RelocVisitor.h
+++ b/include/llvm/Object/RelocVisitor.h
@@ -240,16 +240,14 @@ private:
   }
 
   int64_t getELFAddend(RelocationRef R) {
-    const auto *Obj = cast<ELFObjectFileBase>(R.getObjectFile());
-    DataRefImpl DRI = R.getRawDataRefImpl();
-    ErrorOr<int64_t> AddendOrErr = Obj->getRelocationAddend(DRI);
+    ErrorOr<int64_t> AddendOrErr = ELFRelocationRef(R).getAddend();
     if (std::error_code EC = AddendOrErr.getError())
       report_fatal_error(EC.message());
     return *AddendOrErr;
   }
 
   uint8_t getLengthMachO64(RelocationRef R) {
-    const MachOObjectFile *Obj = cast<MachOObjectFile>(R.getObjectFile());
+    const MachOObjectFile *Obj = cast<MachOObjectFile>(R.getObject());
     return Obj->getRelocationLength(R.getRawDataRefImpl());
   }
 
@@ -267,8 +265,7 @@ private:
   }
 
   RelocToApply visitELF_386_PC32(RelocationRef R, uint64_t Value) {
-    uint64_t Address;
-    R.getOffset(Address);
+    uint64_t Address = R.getOffset();
     return RelocToApply(Value - Address, 4);
   }
 
@@ -282,8 +279,7 @@ private:
   }
   RelocToApply visitELF_X86_64_PC32(RelocationRef R, uint64_t Value) {
     int64_t Addend = getELFAddend(R);
-    uint64_t Address;
-    R.getOffset(Address);
+    uint64_t Address = R.getOffset();
     return RelocToApply(Value + Addend - Address, 4);
   }
   RelocToApply visitELF_X86_64_32(RelocationRef R, uint64_t Value) {
@@ -412,6 +408,6 @@ private:
   }
 };
 
-} // namespace object
-} // namespace llvm
+}
+}
 #endif
diff --git a/include/llvm/Object/StackMapParser.h b/include/llvm/Object/StackMapParser.h
new file mode 100644
index 000000000000..276eab6c294e
--- /dev/null
+++ b/include/llvm/Object/StackMapParser.h
@@ -0,0 +1,442 @@
+//===-------- StackMapParser.h - StackMap Parsing Support -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_STACKMAPPARSER_H
+#define LLVM_CODEGEN_STACKMAPPARSER_H
+
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/Endian.h"
+#include <map>
+#include <vector>
+
+namespace llvm {
+
+template <support::endianness Endianness>
+class StackMapV1Parser {
+public:
+
+  template <typename AccessorT>
+  class AccessorIterator {
+  public:
+
+    AccessorIterator(AccessorT A) : A(A) {}
+    AccessorIterator& operator++() { A = A.next(); return *this; }
+    AccessorIterator operator++(int) {
+      auto tmp = *this;
+      ++*this;
+      return tmp;
+    }
+
+    bool operator==(const AccessorIterator &Other) {
+      return A.P == Other.A.P;
+    }
+
+    bool operator!=(const AccessorIterator &Other) { return !(*this == Other); }
+
+    AccessorT& operator*() { return A; }
+    AccessorT* operator->() { return &A; }
+
+  private:
+    AccessorT A;
+  };
+
+  /// Accessor for function records.
+  class FunctionAccessor {
+    friend class StackMapV1Parser;
+  public:
+
+    /// Get the function address.
+    uint64_t getFunctionAddress() const {
+      return read<uint64_t>(P);
+    }
+
+    /// Get the function's stack size.
+    uint32_t getStackSize() const {
+      return read<uint64_t>(P + sizeof(uint64_t));
+    }
+
+  private:
+    FunctionAccessor(const uint8_t *P) : P(P) {}
+
+    const static int FunctionAccessorSize = 2 * sizeof(uint64_t);
+
+    FunctionAccessor next() const {
+      return FunctionAccessor(P + FunctionAccessorSize);
+    }
+
+    const uint8_t *P;
+  };
+
+  /// Accessor for constants.
+  class ConstantAccessor {
+    friend class StackMapV1Parser;
+  public:
+
+    /// Return the value of this constant.
+    uint64_t getValue() const { return read<uint64_t>(P); }
+
+  private:
+
+    ConstantAccessor(const uint8_t *P) : P(P) {}
+
+    const static int ConstantAccessorSize = sizeof(uint64_t);
+
+    ConstantAccessor next() const {
+      return ConstantAccessor(P + ConstantAccessorSize);
+    }
+
+    const uint8_t *P;
+  };
+
+  // Forward-declare RecordAccessor so we can friend it below.
+  class RecordAccessor;
+
+  enum class LocationKind : uint8_t {
+    Register = 1, Direct = 2, Indirect = 3, Constant = 4, ConstantIndex = 5
+  };
+
+
+  /// Accessor for location records.
+  class LocationAccessor {
+    friend class StackMapV1Parser;
+    friend class RecordAccessor;
+  public:
+
+    /// Get the Kind for this location.
+    LocationKind getKind() const {
+      return LocationKind(P[KindOffset]);
+    }
+
+    /// Get the Dwarf register number for this location.
+    uint16_t getDwarfRegNum() const {
+      return read<uint16_t>(P + DwarfRegNumOffset);
+    }
+
+    /// Get the small-constant for this location. (Kind must be Constant).
+    uint32_t getSmallConstant() const {
+      assert(getKind() == LocationKind::Constant && "Not a small constant.");
+      return read<uint32_t>(P + SmallConstantOffset);
+    }
+
+    /// Get the constant-index for this location. (Kind must be ConstantIndex).
+    uint32_t getConstantIndex() const {
+      assert(getKind() == LocationKind::ConstantIndex &&
+             "Not a constant-index.");
+      return read<uint32_t>(P + SmallConstantOffset);
+    }
+
+    /// Get the offset for this location. (Kind must be Direct or Indirect).
+    int32_t getOffset() const {
+      assert((getKind() == LocationKind::Direct ||
+              getKind() == LocationKind::Indirect) &&
+             "Not direct or indirect.");
+      return read<int32_t>(P + SmallConstantOffset);
+    }
+
+  private:
+
+    LocationAccessor(const uint8_t *P) : P(P) {}
+
+    LocationAccessor next() const {
+      return LocationAccessor(P + LocationAccessorSize);
+    }
+
+    static const int KindOffset = 0;
+    static const int DwarfRegNumOffset = KindOffset + sizeof(uint16_t);
+    static const int SmallConstantOffset = DwarfRegNumOffset + sizeof(uint16_t);
+    static const int LocationAccessorSize = sizeof(uint64_t);
+
+    const uint8_t *P;
+  };
+
+  /// Accessor for stackmap live-out fields.
+  class LiveOutAccessor {
+    friend class StackMapV1Parser;
+    friend class RecordAccessor;
+  public:
+
+    /// Get the Dwarf register number for this live-out.
+    uint16_t getDwarfRegNum() const {
+      return read<uint16_t>(P + DwarfRegNumOffset);
+    }
+
+    /// Get the size in bytes of live [sub]register.
+    unsigned getSizeInBytes() const {
+      return read<uint8_t>(P + SizeOffset);
+    }
+
+  private:
+
+    LiveOutAccessor(const uint8_t *P) : P(P) {}
+
+    LiveOutAccessor next() const {
+      return LiveOutAccessor(P + LiveOutAccessorSize);
+    }
+
+    static const int DwarfRegNumOffset = 0;
+    static const int SizeOffset =
+      DwarfRegNumOffset + sizeof(uint16_t) + sizeof(uint8_t);
+    static const int LiveOutAccessorSize = sizeof(uint32_t);
+
+    const uint8_t *P;
+  };
+
+  /// Accessor for stackmap records.
+  class RecordAccessor {
+    friend class StackMapV1Parser;
+  public:
+
+    typedef AccessorIterator<LocationAccessor> location_iterator;
+    typedef AccessorIterator<LiveOutAccessor> liveout_iterator;
+
+    /// Get the patchpoint/stackmap ID for this record.
+    uint64_t getID() const {
+      return read<uint64_t>(P + PatchpointIDOffset);
+    }
+
+    /// Get the instruction offset (from the start of the containing function)
+    /// for this record.
+    uint32_t getInstructionOffset() const {
+      return read<uint32_t>(P + InstructionOffsetOffset);
+    }
+
+    /// Get the number of locations contained in this record.
+    uint16_t getNumLocations() const {
+      return read<uint16_t>(P + NumLocationsOffset);
+    }
+
+    /// Get the location with the given index.
+    LocationAccessor getLocation(unsigned LocationIndex) const {
+      unsigned LocationOffset =
+        LocationListOffset + LocationIndex * LocationSize;
+      return LocationAccessor(P + LocationOffset);
+    }
+
+    /// Begin iterator for locations.
+    location_iterator location_begin() const {
+      return location_iterator(getLocation(0));
+    }
+
+    /// End iterator for locations.
+    location_iterator location_end() const {
+      return location_iterator(getLocation(getNumLocations()));
+    }
+
+    /// Iterator range for locations.
+    iterator_range<location_iterator> locations() const {
+      return make_range(location_begin(), location_end());
+    }
+
+    /// Get the number of liveouts contained in this record.
+    uint16_t getNumLiveOuts() const {
+      return read<uint16_t>(P + getNumLiveOutsOffset());
+    }
+
+    /// Get the live-out with the given index.
+    LiveOutAccessor getLiveOut(unsigned LiveOutIndex) const {
+      unsigned LiveOutOffset =
+        getNumLiveOutsOffset() + sizeof(uint16_t) + LiveOutIndex * LiveOutSize;
+      return LiveOutAccessor(P + LiveOutOffset);
+    }
+
+    /// Begin iterator for live-outs.
+    liveout_iterator liveouts_begin() const {
+      return liveout_iterator(getLiveOut(0));
+    }
+
+
+    /// End iterator for live-outs.
+    liveout_iterator liveouts_end() const {
+      return liveout_iterator(getLiveOut(getNumLiveOuts()));
+    }
+
+    /// Iterator range for live-outs.
+    iterator_range<liveout_iterator> liveouts() const {
+      return make_range(liveouts_begin(), liveouts_end());
+    }
+
+  private:
+
+    RecordAccessor(const uint8_t *P) : P(P) {}
+
+    unsigned getNumLiveOutsOffset() const {
+      return LocationListOffset + LocationSize * getNumLocations() +
+             sizeof(uint16_t);
+    }
+
+    unsigned getSizeInBytes() const {
+      unsigned RecordSize =
+        getNumLiveOutsOffset() + sizeof(uint16_t) + getNumLiveOuts() * LiveOutSize;
+      return (RecordSize + 7) & ~0x7;
+    }
+
+    RecordAccessor next() const {
+      return RecordAccessor(P + getSizeInBytes());
+    }
+
+    static const unsigned PatchpointIDOffset = 0;
+    static const unsigned InstructionOffsetOffset =
+      PatchpointIDOffset + sizeof(uint64_t);
+    static const unsigned NumLocationsOffset =
+      InstructionOffsetOffset + sizeof(uint32_t) + sizeof(uint16_t);
+    static const unsigned LocationListOffset =
+      NumLocationsOffset + sizeof(uint16_t);
+    static const unsigned LocationSize = sizeof(uint64_t);
+    static const unsigned LiveOutSize = sizeof(uint32_t);
+
+    const uint8_t *P;
+  };
+
+  /// Construct a parser for a version-1 stackmap. StackMap data will be read
+  /// from the given array.
+  StackMapV1Parser(ArrayRef<uint8_t> StackMapSection)
+      : StackMapSection(StackMapSection) {
+    ConstantsListOffset = FunctionListOffset + getNumFunctions() * FunctionSize;
+
+    assert(StackMapSection[0] == 1 &&
+           "StackMapV1Parser can only parse version 1 stackmaps");
+
+    unsigned CurrentRecordOffset =
+      ConstantsListOffset + getNumConstants() * ConstantSize;
+
+    for (unsigned I = 0, E = getNumRecords(); I != E; ++I) {
+      StackMapRecordOffsets.push_back(CurrentRecordOffset);
+      CurrentRecordOffset +=
+        RecordAccessor(&StackMapSection[CurrentRecordOffset]).getSizeInBytes();
+    }
+  }
+
+  typedef AccessorIterator<FunctionAccessor> function_iterator;
+  typedef AccessorIterator<ConstantAccessor> constant_iterator;
+  typedef AccessorIterator<RecordAccessor> record_iterator;
+
+  /// Get the version number of this stackmap. (Always returns 1).
+  unsigned getVersion() const { return 1; }
+
+  /// Get the number of functions in the stack map.
+  uint32_t getNumFunctions() const {
+    return read<uint32_t>(&StackMapSection[NumFunctionsOffset]);
+  }
+
+  /// Get the number of large constants in the stack map.
+  uint32_t getNumConstants() const {
+    return read<uint32_t>(&StackMapSection[NumConstantsOffset]);
+  }
+
+  /// Get the number of stackmap records in the stackmap.
+  uint32_t getNumRecords() const {
+    return read<uint32_t>(&StackMapSection[NumRecordsOffset]);
+  }
+
+  /// Return an FunctionAccessor for the given function index.
+  FunctionAccessor getFunction(unsigned FunctionIndex) const {
+    return FunctionAccessor(StackMapSection.data() +
+                            getFunctionOffset(FunctionIndex));
+  }
+
+  /// Begin iterator for functions.
+  function_iterator functions_begin() const {
+    return function_iterator(getFunction(0));
+  }
+
+  /// End iterator for functions.
+  function_iterator functions_end() const {
+    return function_iterator(
+             FunctionAccessor(StackMapSection.data() +
+                              getFunctionOffset(getNumFunctions())));
+  }
+
+  /// Iterator range for functions.
+  iterator_range<function_iterator> functions() const {
+    return make_range(functions_begin(), functions_end());
+  }
+
+  /// Return the large constant at the given index.
+  ConstantAccessor getConstant(unsigned ConstantIndex) const {
+    return ConstantAccessor(StackMapSection.data() +
+                            getConstantOffset(ConstantIndex));
+  }
+
+  /// Begin iterator for constants.
+  constant_iterator constants_begin() const {
+    return constant_iterator(getConstant(0));
+  }
+
+  /// End iterator for constants.
+  constant_iterator constants_end() const {
+    return constant_iterator(
+             ConstantAccessor(StackMapSection.data() +
+                              getConstantOffset(getNumConstants())));
+  }
+
+  /// Iterator range for constants.
+  iterator_range<constant_iterator> constants() const {
+    return make_range(constants_begin(), constants_end());
+  }
+
+  /// Return a RecordAccessor for the given record index.
+  RecordAccessor getRecord(unsigned RecordIndex) const {
+    std::size_t RecordOffset = StackMapRecordOffsets[RecordIndex];
+    return RecordAccessor(StackMapSection.data() + RecordOffset);
+  }
+
+  /// Begin iterator for records.
+  record_iterator records_begin() const {
+    if (getNumRecords() == 0)
+      return record_iterator(RecordAccessor(nullptr));
+    return record_iterator(getRecord(0));
+  }
+
+  /// End iterator for records.
+  record_iterator records_end() const {
+    // Records need to be handled specially, since we cache the start addresses
+    // for them: We can't just compute the 1-past-the-end address, we have to
+    // look at the last record and use the 'next' method.
+    if (getNumRecords() == 0)
+      return record_iterator(RecordAccessor(nullptr));
+    return record_iterator(getRecord(getNumRecords() - 1).next());
+  }
+
+  /// Iterator range for records.
+  iterator_range<record_iterator> records() const {
+    return make_range(records_begin(), records_end());
+  }
+
+private:
+
+  template <typename T>
+  static T read(const uint8_t *P) {
+    return support::endian::read<T, Endianness, 1>(P);
+  }
+
+  static const unsigned HeaderOffset = 0;
+  static const unsigned NumFunctionsOffset = HeaderOffset + sizeof(uint32_t);
+  static const unsigned NumConstantsOffset = NumFunctionsOffset + sizeof(uint32_t);
+  static const unsigned NumRecordsOffset = NumConstantsOffset + sizeof(uint32_t);
+  static const unsigned FunctionListOffset = NumRecordsOffset + sizeof(uint32_t);
+
+  static const unsigned FunctionSize = 2 * sizeof(uint64_t);
+  static const unsigned ConstantSize = sizeof(uint64_t);
+
+  std::size_t getFunctionOffset(unsigned FunctionIndex) const {
+    return FunctionListOffset + FunctionIndex * FunctionSize;
+  }
+
+  std::size_t getConstantOffset(unsigned ConstantIndex) const {
+    return ConstantsListOffset + ConstantIndex * ConstantSize;
+  }
+
+  ArrayRef<uint8_t> StackMapSection;
+  unsigned ConstantsListOffset;
+  std::vector<unsigned> StackMapRecordOffsets;
+};
+
+}
+
+#endif
diff --git a/include/llvm/Object/SymbolSize.h b/include/llvm/Object/SymbolSize.h
new file mode 100644
index 000000000000..f2ce70f4208d
--- /dev/null
+++ b/include/llvm/Object/SymbolSize.h
@@ -0,0 +1,23 @@
+//===- SymbolSize.h ---------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_OBJECT_SYMBOLSIZE_H
+#define LLVM_OBJECT_SYMBOLSIZE_H
+
+#include "llvm/Object/ObjectFile.h"
+
+namespace llvm {
+namespace object {
+std::vector<std::pair<SymbolRef, uint64_t>>
+computeSymbolSizes(const ObjectFile &O);
+}
+} // namespace llvm
+
+#endif
diff --git a/include/llvm/Object/SymbolicFile.h b/include/llvm/Object/SymbolicFile.h
index bf465997838f..3a3823159c92 100644
--- a/include/llvm/Object/SymbolicFile.h
+++ b/include/llvm/Object/SymbolicFile.h
@@ -115,7 +115,7 @@ public:
 
 typedef content_iterator<BasicSymbolRef> basic_symbol_iterator;
 
-const uint64_t UnknownAddressOrSize = ~0ULL;
+const uint64_t UnknownAddress = ~0ULL;
 
 class SymbolicFile : public Binary {
 public:
@@ -195,7 +195,7 @@ inline const SymbolicFile *BasicSymbolRef::getObject() const {
   return OwningObject;
 }
 
-} // namespace object
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Option/Arg.h b/include/llvm/Option/Arg.h
index 5f6941a53d0c..e1b72b6267cf 100644
--- a/include/llvm/Option/Arg.h
+++ b/include/llvm/Option/Arg.h
@@ -93,9 +93,8 @@ public:
     return Values[N];
   }
 
-  SmallVectorImpl<const char*> &getValues() {
-    return Values;
-  }
+  SmallVectorImpl<const char *> &getValues() { return Values; }
+  const SmallVectorImpl<const char *> &getValues() const { return Values; }
 
   bool containsValue(StringRef Value) const {
     for (unsigned i = 0, e = getNumValues(); i != e; ++i)
diff --git a/include/llvm/Option/ArgList.h b/include/llvm/Option/ArgList.h
index 23b04513178c..ef4005761b75 100644
--- a/include/llvm/Option/ArgList.h
+++ b/include/llvm/Option/ArgList.h
@@ -14,6 +14,7 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Twine.h"
+#include "llvm/Option/Arg.h"
 #include "llvm/Option/OptSpecifier.h"
 #include "llvm/Option/Option.h"
 #include <list>
@@ -23,7 +24,6 @@
 
 namespace llvm {
 namespace opt {
-class Arg;
 class ArgList;
 class Option;
 
@@ -92,10 +92,6 @@ public:
 /// check for the presence of Arg instances for a particular Option
 /// and to iterate over groups of arguments.
 class ArgList {
-private:
-  ArgList(const ArgList &) = delete;
-  void operator=(const ArgList &) = delete;
-
 public:
   typedef SmallVector<Arg*, 16> arglist_type;
   typedef arglist_type::iterator iterator;
@@ -108,12 +104,23 @@ private:
   arglist_type Args;
 
 protected:
-  // Default ctor provided explicitly as it is not provided implicitly due to
-  // the presence of the (deleted) copy ctor above.
-  ArgList() { }
-  // Virtual to provide a vtable anchor and because -Wnon-virtua-dtor warns, not
-  // because this type is ever actually destroyed polymorphically.
-  virtual ~ArgList();
+  // Make the default special members protected so they won't be used to slice
+  // derived objects, but can still be used by derived objects to implement
+  // their own special members.
+  ArgList() = default;
+  // Explicit move operations to ensure the container is cleared post-move
+  // otherwise it could lead to a double-delete in the case of moving of an
+  // InputArgList which deletes the contents of the container. If we could fix
+  // up the ownership here (delegate storage/ownership to the derived class so
+  // it can be a container of unique_ptr) this would be simpler.
+  ArgList(ArgList &&RHS) : Args(std::move(RHS.Args)) { RHS.Args.clear(); }
+  ArgList &operator=(ArgList &&RHS) {
+    Args = std::move(RHS.Args);
+    RHS.Args.clear();
+    return *this;
+  }
+  // Protect the dtor to ensure this type is never destroyed polymorphically.
+  ~ArgList() = default;
 
 public:
 
@@ -299,7 +306,7 @@ public:
   /// @}
 };
 
-class InputArgList : public ArgList  {
+class InputArgList final : public ArgList {
 private:
   /// List of argument strings used by the contained Args.
   ///
@@ -318,9 +325,24 @@ private:
   /// The number of original input argument strings.
   unsigned NumInputArgStrings;
 
+  /// Release allocated arguments.
+  void releaseMemory();
+
 public:
   InputArgList(const char* const *ArgBegin, const char* const *ArgEnd);
-  ~InputArgList() override;
+  InputArgList(InputArgList &&RHS)
+      : ArgList(std::move(RHS)), ArgStrings(std::move(RHS.ArgStrings)),
+        SynthesizedStrings(std::move(RHS.SynthesizedStrings)),
+        NumInputArgStrings(RHS.NumInputArgStrings) {}
+  InputArgList &operator=(InputArgList &&RHS) {
+    releaseMemory();
+    ArgList::operator=(std::move(RHS));
+    ArgStrings = std::move(RHS.ArgStrings);
+    SynthesizedStrings = std::move(RHS.SynthesizedStrings);
+    NumInputArgStrings = RHS.NumInputArgStrings;
+    return *this;
+  }
+  ~InputArgList() { releaseMemory(); }
 
   const char *getArgString(unsigned Index) const override {
     return ArgStrings[Index];
@@ -346,7 +368,7 @@ public:
 
 /// DerivedArgList - An ordered collection of driver arguments,
 /// whose storage may be in another argument list.
-class DerivedArgList : public ArgList {
+class DerivedArgList final : public ArgList {
   const InputArgList &BaseArgs;
 
   /// The list of arguments we synthesized.
@@ -355,7 +377,6 @@ class DerivedArgList : public ArgList {
 public:
   /// Construct a new derived arg list from \p BaseArgs.
   DerivedArgList(const InputArgList &BaseArgs);
-  ~DerivedArgList() override;
 
   const char *getArgString(unsigned Index) const override {
     return BaseArgs.getArgString(Index);
diff --git a/include/llvm/Option/OptSpecifier.h b/include/llvm/Option/OptSpecifier.h
index f9b121e352db..0b2aaaec3afc 100644
--- a/include/llvm/Option/OptSpecifier.h
+++ b/include/llvm/Option/OptSpecifier.h
@@ -35,7 +35,7 @@ namespace opt {
     bool operator==(OptSpecifier Opt) const { return ID == Opt.getID(); }
     bool operator!=(OptSpecifier Opt) const { return !(*this == Opt); }
   };
-} // namespace opt
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Option/OptTable.h b/include/llvm/Option/OptTable.h
index a7ff46919cd6..96f51cf3317d 100644
--- a/include/llvm/Option/OptTable.h
+++ b/include/llvm/Option/OptTable.h
@@ -10,6 +10,7 @@
 #ifndef LLVM_OPTION_OPTTABLE_H
 #define LLVM_OPTION_OPTTABLE_H
 
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/StringSet.h"
 #include "llvm/Option/OptSpecifier.h"
 
@@ -141,8 +142,6 @@ public:
   /// The only error that can occur in this routine is if an argument is
   /// missing values; in this case \p MissingArgCount will be non-zero.
   ///
-  /// \param ArgBegin - The beginning of the argument vector.
-  /// \param ArgEnd - The end of the argument vector.
   /// \param MissingArgIndex - On error, the index of the option which could
   /// not be parsed.
   /// \param MissingArgCount - On error, the number of missing options.
@@ -152,12 +151,9 @@ public:
   /// is the default and means exclude nothing.
   /// \return An InputArgList; on error this will contain all the options
   /// which could be parsed.
-  InputArgList *ParseArgs(const char* const *ArgBegin,
-                          const char* const *ArgEnd,
-                          unsigned &MissingArgIndex,
-                          unsigned &MissingArgCount,
-                          unsigned FlagsToInclude = 0,
-                          unsigned FlagsToExclude = 0) const;
+  InputArgList ParseArgs(ArrayRef<const char *> Args, unsigned &MissingArgIndex,
+                         unsigned &MissingArgCount, unsigned FlagsToInclude = 0,
+                         unsigned FlagsToExclude = 0) const;
 
   /// \brief Render the help text for an option table.
   ///
diff --git a/include/llvm/Pass.h b/include/llvm/Pass.h
index ccd6f2728230..3c4d838a4652 100644
--- a/include/llvm/Pass.h
+++ b/include/llvm/Pass.h
@@ -369,7 +369,7 @@ protected:
 /// @brief This is the storage for the -time-passes option.
 extern bool TimePassesIsEnabled;
 
-} // namespace llvm
+} // End llvm namespace
 
 // Include support files that contain important APIs commonly used by Passes,
 // but that we want to separate out to make it easier to read the header files.
diff --git a/include/llvm/PassAnalysisSupport.h b/include/llvm/PassAnalysisSupport.h
index d356097d0b94..0b318fc8fb07 100644
--- a/include/llvm/PassAnalysisSupport.h
+++ b/include/llvm/PassAnalysisSupport.h
@@ -27,28 +27,27 @@
 namespace llvm {
 
 //===----------------------------------------------------------------------===//
-// AnalysisUsage - Represent the analysis usage information of a pass.  This
-// tracks analyses that the pass REQUIRES (must be available when the pass
-// runs), REQUIRES TRANSITIVE (must be available throughout the lifetime of the
-// pass), and analyses that the pass PRESERVES (the pass does not invalidate the
-// results of these analyses).  This information is provided by a pass to the
-// Pass infrastructure through the getAnalysisUsage virtual function.
-//
+/// Represent the analysis usage information of a pass.  This tracks analyses
+/// that the pass REQUIRES (must be available when the pass runs), REQUIRES
+/// TRANSITIVE (must be available throughout the lifetime of the pass), and
+/// analyses that the pass PRESERVES (the pass does not invalidate the results
+/// of these analyses).  This information is provided by a pass to the Pass
+/// infrastructure through the getAnalysisUsage virtual function.
+///
 class AnalysisUsage {
 public:
   typedef SmallVector<AnalysisID, 32> VectorType;
 
 private:
-  // Sets of analyses required and preserved by a pass
+  /// Sets of analyses required and preserved by a pass
   VectorType Required, RequiredTransitive, Preserved;
   bool PreservesAll;
 
 public:
   AnalysisUsage() : PreservesAll(false) {}
 
-  // addRequired - Add the specified ID to the required set of the usage info
-  // for a pass.
-  //
+  ///@{
+  /// Add the specified ID to the required set of the usage info for a pass.
   AnalysisUsage &addRequiredID(const void *ID);
   AnalysisUsage &addRequiredID(char &ID);
   template<class PassClass>
@@ -61,10 +60,10 @@ public:
   AnalysisUsage &addRequiredTransitive() {
     return addRequiredTransitiveID(PassClass::ID);
   }
+  ///@}
 
-  // addPreserved - Add the specified ID to the set of analyses preserved by
-  // this pass
-  //
+  ///@{
+  /// Add the specified ID to the set of analyses preserved by this pass.
   AnalysisUsage &addPreservedID(const void *ID) {
     Preserved.push_back(ID);
     return *this;
@@ -73,29 +72,28 @@ public:
     Preserved.push_back(&ID);
     return *this;
   }
+  ///@}
 
-  // addPreserved - Add the specified Pass class to the set of analyses
-  // preserved by this pass.
-  //
+  /// Add the specified Pass class to the set of analyses preserved by this pass.
   template<class PassClass>
   AnalysisUsage &addPreserved() {
     Preserved.push_back(&PassClass::ID);
     return *this;
   }
 
-  // addPreserved - Add the Pass with the specified argument string to the set
-  // of analyses preserved by this pass. If no such Pass exists, do nothing.
-  // This can be useful when a pass is trivially preserved, but may not be
-  // linked in. Be careful about spelling!
-  //
+  /// Add the Pass with the specified argument string to the set of analyses
+  /// preserved by this pass. If no such Pass exists, do nothing. This can be
+  /// useful when a pass is trivially preserved, but may not be linked in. Be
+  /// careful about spelling!
   AnalysisUsage &addPreserved(StringRef Arg);
 
-  // setPreservesAll - Set by analyses that do not transform their input at all
+  /// Set by analyses that do not transform their input at all
   void setPreservesAll() { PreservesAll = true; }
+
+  /// Determine whether a pass said it does not transform its input at all
   bool getPreservesAll() const { return PreservesAll; }
 
-  /// setPreservesCFG - This function should be called by the pass, iff they do
-  /// not:
+  /// This function should be called by the pass, iff they do not:
   ///
   ///  1. Add or remove basic blocks from the function
   ///  2. Modify terminator instructions in any way.
@@ -113,10 +111,10 @@ public:
 };
 
 //===----------------------------------------------------------------------===//
-// AnalysisResolver - Simple interface used by Pass objects to pull all
-// analysis information out of pass manager that is responsible to manage
-// the pass.
-//
+/// AnalysisResolver - Simple interface used by Pass objects to pull all
+/// analysis information out of pass manager that is responsible to manage
+/// the pass.
+///
 class PMDataManager;
 class AnalysisResolver {
 private:
@@ -124,10 +122,10 @@ private:
 
 public:
   explicit AnalysisResolver(PMDataManager &P) : PM(P) { }
-  
+
   inline PMDataManager &getPMDataManager() { return PM; }
 
-  // Find pass that is implementing PI.
+  /// Find pass that is implementing PI.
   Pass *findImplPass(AnalysisID PI) {
     Pass *ResultPass = nullptr;
     for (unsigned i = 0; i < AnalysisImpls.size() ; ++i) {
@@ -139,7 +137,7 @@ public:
     return ResultPass;
   }
 
-  // Find pass that is implementing PI. Initialize pass for Function F.
+  /// Find pass that is implementing PI. Initialize pass for Function F.
   Pass *findImplPass(Pass *P, AnalysisID PI, Function &F);
 
   void addAnalysisImplsPair(AnalysisID PI, Pass *P) {
@@ -149,21 +147,20 @@ public:
     AnalysisImpls.push_back(pir);
   }
 
-  /// clearAnalysisImpls - Clear cache that is used to connect a pass to the
-  /// the analysis (PassInfo).
+  /// Clear cache that is used to connect a pass to the the analysis (PassInfo).
   void clearAnalysisImpls() {
     AnalysisImpls.clear();
   }
 
-  // getAnalysisIfAvailable - Return analysis result or null if it doesn't exist
+  /// Return analysis result or null if it doesn't exist.
   Pass *getAnalysisIfAvailable(AnalysisID ID, bool Direction) const;
 
 private:
-  // AnalysisImpls - This keeps track of which passes implements the interfaces
-  // that are required by the current pass (to implement getAnalysis()).
+  /// This keeps track of which passes implements the interfaces that are
+  /// required by the current pass (to implement getAnalysis()).
   std::vector<std::pair<AnalysisID, Pass*> > AnalysisImpls;
 
-  // PassManager that is used to resolve analysis info
+  /// PassManager that is used to resolve analysis info
   PMDataManager &PM;
 };
 
@@ -240,7 +237,7 @@ AnalysisType &Pass::getAnalysisID(AnalysisID PI, Function &F) {
   // vector.
   Pass *ResultPass = Resolver->findImplPass(this, PI, F);
   assert(ResultPass && "Unable to find requested analysis info");
-  
+
   // Because the AnalysisType may not be a subclass of pass (for
   // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
   // adjust the return pointer (because the class may multiply inherit, once
@@ -248,6 +245,6 @@ AnalysisType &Pass::getAnalysisID(AnalysisID PI, Function &F) {
   return *(AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/PassInfo.h b/include/llvm/PassInfo.h
index 6a2f942bbca7..d10761831b3a 100644
--- a/include/llvm/PassInfo.h
+++ b/include/llvm/PassInfo.h
@@ -142,6 +142,6 @@ private:
   PassInfo(const PassInfo &) = delete;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/PassRegistry.h b/include/llvm/PassRegistry.h
index 0d2cd24e81a6..8c28ef5e7e61 100644
--- a/include/llvm/PassRegistry.h
+++ b/include/llvm/PassRegistry.h
@@ -95,6 +95,6 @@ public:
 // Create wrappers for C Binding types (see CBindingWrapping.h).
 DEFINE_STDCXX_CONVERSION_FUNCTIONS(PassRegistry, LLVMPassRegistryRef)
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/PassSupport.h b/include/llvm/PassSupport.h
index af1a195dfd8c..6cb6516412e8 100644
--- a/include/llvm/PassSupport.h
+++ b/include/llvm/PassSupport.h
@@ -245,6 +245,6 @@ struct PassRegistrationListener {
 };
 
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Passes/PassBuilder.h b/include/llvm/Passes/PassBuilder.h
index bbf80f8ca4bf..1e605e374178 100644
--- a/include/llvm/Passes/PassBuilder.h
+++ b/include/llvm/Passes/PassBuilder.h
@@ -100,6 +100,6 @@ private:
                                bool VerifyEachPass, bool DebugLogging);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/ProfileData/CoverageMapping.h b/include/llvm/ProfileData/CoverageMapping.h
index 94e655c3edcb..3488e793d84f 100644
--- a/include/llvm/ProfileData/CoverageMapping.h
+++ b/include/llvm/ProfileData/CoverageMapping.h
@@ -410,7 +410,7 @@ public:
   /// \brief Load the coverage mapping from the given files.
   static ErrorOr<std::unique_ptr<CoverageMapping>>
   load(StringRef ObjectFilename, StringRef ProfileFilename,
-       Triple::ArchType Arch = Triple::ArchType::UnknownArch);
+       StringRef Arch = StringRef());
 
   /// \brief The number of functions that couldn't have their profiles mapped.
   ///
diff --git a/include/llvm/ProfileData/CoverageMappingReader.h b/include/llvm/ProfileData/CoverageMappingReader.h
index 020edbd3e6c1..38fb4680476b 100644
--- a/include/llvm/ProfileData/CoverageMappingReader.h
+++ b/include/llvm/ProfileData/CoverageMappingReader.h
@@ -171,7 +171,7 @@ private:
 public:
   static ErrorOr<std::unique_ptr<BinaryCoverageReader>>
   create(std::unique_ptr<MemoryBuffer> &ObjectBuffer,
-         Triple::ArchType Arch = Triple::ArchType::UnknownArch);
+         StringRef Arch);
 
   std::error_code readNextRecord(CoverageMappingRecord &Record) override;
 };
diff --git a/include/llvm/ProfileData/InstrProf.h b/include/llvm/ProfileData/InstrProf.h
index eafb76886c83..77055ba87268 100644
--- a/include/llvm/ProfileData/InstrProf.h
+++ b/include/llvm/ProfileData/InstrProf.h
@@ -16,7 +16,10 @@
 #ifndef LLVM_PROFILEDATA_INSTRPROF_H_
 #define LLVM_PROFILEDATA_INSTRPROF_H_
 
+#include "llvm/ADT/StringRef.h"
+#include <cstdint>
 #include <system_error>
+#include <vector>
 
 namespace llvm {
 const std::error_category &instrprof_category();
@@ -41,6 +44,16 @@ inline std::error_code make_error_code(instrprof_error E) {
   return std::error_code(static_cast<int>(E), instrprof_category());
 }
 
+/// Profiling information for a single function.
+struct InstrProfRecord {
+  InstrProfRecord() {}
+  InstrProfRecord(StringRef Name, uint64_t Hash, std::vector<uint64_t> Counts)
+      : Name(Name), Hash(Hash), Counts(std::move(Counts)) {}
+  StringRef Name;
+  uint64_t Hash;
+  std::vector<uint64_t> Counts;
+};
+
 } // end namespace llvm
 
 namespace std {
diff --git a/include/llvm/ProfileData/InstrProfReader.h b/include/llvm/ProfileData/InstrProfReader.h
index 63a6ac671f2b..f937e7d08d54 100644
--- a/include/llvm/ProfileData/InstrProfReader.h
+++ b/include/llvm/ProfileData/InstrProfReader.h
@@ -29,16 +29,6 @@ namespace llvm {
 
 class InstrProfReader;
 
-/// Profiling information for a single function.
-struct InstrProfRecord {
-  InstrProfRecord() {}
-  InstrProfRecord(StringRef Name, uint64_t Hash, ArrayRef<uint64_t> Counts)
-      : Name(Name), Hash(Hash), Counts(Counts) {}
-  StringRef Name;
-  uint64_t Hash;
-  ArrayRef<uint64_t> Counts;
-};
-
 /// A file format agnostic iterator over profiling data.
 class InstrProfIterator : public std::iterator<std::input_iterator_tag,
                                                InstrProfRecord> {
@@ -114,8 +104,6 @@ private:
   std::unique_ptr<MemoryBuffer> DataBuffer;
   /// Iterator over the profile data.
   line_iterator Line;
-  /// The current set of counter values.
-  std::vector<uint64_t> Counts;
 
   TextInstrProfReader(const TextInstrProfReader &) = delete;
   TextInstrProfReader &operator=(const TextInstrProfReader &) = delete;
@@ -141,8 +129,6 @@ class RawInstrProfReader : public InstrProfReader {
 private:
   /// The profile data file contents.
   std::unique_ptr<MemoryBuffer> DataBuffer;
-  /// The current set of counter values.
-  std::vector<uint64_t> Counts;
   struct ProfileData {
     const uint32_t NameSize;
     const uint32_t NumCounters;
@@ -206,17 +192,16 @@ enum class HashT : uint32_t;
 /// Trait for lookups into the on-disk hash table for the binary instrprof
 /// format.
 class InstrProfLookupTrait {
-  std::vector<uint64_t> DataBuffer;
+  std::vector<InstrProfRecord> DataBuffer;
   IndexedInstrProf::HashT HashType;
+  unsigned FormatVersion;
+
 public:
-  InstrProfLookupTrait(IndexedInstrProf::HashT HashType) : HashType(HashType) {}
+  InstrProfLookupTrait(IndexedInstrProf::HashT HashType, unsigned FormatVersion)
+      : HashType(HashType), FormatVersion(FormatVersion) {}
+
+  typedef ArrayRef<InstrProfRecord> data_type;
 
-  struct data_type {
-    data_type(StringRef Name, ArrayRef<uint64_t> Data)
-        : Name(Name), Data(Data) {}
-    StringRef Name;
-    ArrayRef<uint64_t> Data;
-  };
   typedef StringRef internal_key_type;
   typedef StringRef external_key_type;
   typedef uint64_t hash_value_type;
@@ -239,22 +224,9 @@ public:
     return StringRef((const char *)D, N);
   }
 
-  data_type ReadData(StringRef K, const unsigned char *D, offset_type N) {
-    DataBuffer.clear();
-    if (N % sizeof(uint64_t))
-      // The data is corrupt, don't try to read it.
-      return data_type("", DataBuffer);
-
-    using namespace support;
-    // We just treat the data as opaque here. It's simpler to handle in
-    // IndexedInstrProfReader.
-    unsigned NumEntries = N / sizeof(uint64_t);
-    DataBuffer.reserve(NumEntries);
-    for (unsigned I = 0; I < NumEntries; ++I)
-      DataBuffer.push_back(endian::readNext<uint64_t, little, unaligned>(D));
-    return data_type(K, DataBuffer);
-  }
+  data_type ReadData(StringRef K, const unsigned char *D, offset_type N);
 };
+
 typedef OnDiskIterableChainedHashTable<InstrProfLookupTrait>
     InstrProfReaderIndex;
 
@@ -267,8 +239,6 @@ private:
   std::unique_ptr<InstrProfReaderIndex> Index;
   /// Iterator over the profile data.
   InstrProfReaderIndex::data_iterator RecordIterator;
-  /// Offset into our current data set.
-  size_t CurrentOffset;
   /// The file format version of the profile data.
   uint64_t FormatVersion;
   /// The maximal execution count among all functions.
@@ -278,7 +248,7 @@ private:
   IndexedInstrProfReader &operator=(const IndexedInstrProfReader &) = delete;
 public:
   IndexedInstrProfReader(std::unique_ptr<MemoryBuffer> DataBuffer)
-      : DataBuffer(std::move(DataBuffer)), Index(nullptr), CurrentOffset(0) {}
+      : DataBuffer(std::move(DataBuffer)), Index(nullptr) {}
 
   /// Return true if the given buffer is in an indexed instrprof format.
   static bool hasFormat(const MemoryBuffer &DataBuffer);
diff --git a/include/llvm/Support/ARMEHABI.h b/include/llvm/Support/ARMEHABI.h
index db045a8a3efa..9b052df0a908 100644
--- a/include/llvm/Support/ARMEHABI.h
+++ b/include/llvm/Support/ARMEHABI.h
@@ -127,8 +127,8 @@ namespace EHABI {
 
     NUM_PERSONALITY_INDEX
   };
-} // namespace EHABI
-} // namespace ARM
-} // namespace llvm
+}
+}
+}
 
 #endif
diff --git a/include/llvm/Support/ARMWinEH.h b/include/llvm/Support/ARMWinEH.h
index 0b379032c200..1463629f45dc 100644
--- a/include/llvm/Support/ARMWinEH.h
+++ b/include/llvm/Support/ARMWinEH.h
@@ -375,8 +375,8 @@ struct ExceptionDataRecord {
 inline size_t HeaderWords(const ExceptionDataRecord &XR) {
   return (XR.Data[0] & 0xff800000) ? 1 : 2;
 }
-} // namespace WinEH
-} // namespace ARM
-} // namespace llvm
+}
+}
+}
 
 #endif
diff --git a/include/llvm/Support/ArrayRecycler.h b/include/llvm/Support/ArrayRecycler.h
index 5907c79db2be..36f644af2880 100644
--- a/include/llvm/Support/ArrayRecycler.h
+++ b/include/llvm/Support/ArrayRecycler.h
@@ -138,6 +138,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/Support/Atomic.h b/include/llvm/Support/Atomic.h
index a3cec47563b8..9ec23e827023 100644
--- a/include/llvm/Support/Atomic.h
+++ b/include/llvm/Support/Atomic.h
@@ -33,7 +33,7 @@ namespace llvm {
     cas_flag AtomicAdd(volatile cas_flag* ptr, cas_flag val);
     cas_flag AtomicMul(volatile cas_flag* ptr, cas_flag val);
     cas_flag AtomicDiv(volatile cas_flag* ptr, cas_flag val);
-  } // namespace sys
-} // namespace llvm
+  }
+}
 
 #endif
diff --git a/include/llvm/Support/BlockFrequency.h b/include/llvm/Support/BlockFrequency.h
index 20b2782ad61a..4304a253b287 100644
--- a/include/llvm/Support/BlockFrequency.h
+++ b/include/llvm/Support/BlockFrequency.h
@@ -69,6 +69,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/BranchProbability.h b/include/llvm/Support/BranchProbability.h
index df89d2dd4da9..a6429dd22a3b 100644
--- a/include/llvm/Support/BranchProbability.h
+++ b/include/llvm/Support/BranchProbability.h
@@ -84,6 +84,6 @@ inline raw_ostream &operator<<(raw_ostream &OS, const BranchProbability &Prob) {
   return Prob.print(OS);
 }
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/COM.h b/include/llvm/Support/COM.h
index 45559b0ec149..a2d5a7a68ba9 100644
--- a/include/llvm/Support/COM.h
+++ b/include/llvm/Support/COM.h
@@ -30,7 +30,7 @@ private:
   InitializeCOMRAII(const InitializeCOMRAII &) = delete;
   void operator=(const InitializeCOMRAII &) = delete;
 };
-} // namespace sys
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Support/Casting.h b/include/llvm/Support/Casting.h
index e84676abc779..6ba5efa47554 100644
--- a/include/llvm/Support/Casting.h
+++ b/include/llvm/Support/Casting.h
@@ -321,6 +321,6 @@ dyn_cast_or_null(Y *Val) {
   return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr;
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/CodeGen.h b/include/llvm/Support/CodeGen.h
index 1eca5681e449..243f2dd7498c 100644
--- a/include/llvm/Support/CodeGen.h
+++ b/include/llvm/Support/CodeGen.h
@@ -90,6 +90,6 @@ namespace llvm {
     }
     llvm_unreachable("Bad CodeModel!");
   }
-} // namespace llvm
+}  // end llvm namespace
 
 #endif
diff --git a/include/llvm/Support/CrashRecoveryContext.h b/include/llvm/Support/CrashRecoveryContext.h
index 13aff7a37b7a..c08c3c1f0d21 100644
--- a/include/llvm/Support/CrashRecoveryContext.h
+++ b/include/llvm/Support/CrashRecoveryContext.h
@@ -199,6 +199,6 @@ public:
     cleanup = 0;
   }
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/DOTGraphTraits.h b/include/llvm/Support/DOTGraphTraits.h
index 3d21129066ec..95e37c01d7d5 100644
--- a/include/llvm/Support/DOTGraphTraits.h
+++ b/include/llvm/Support/DOTGraphTraits.h
@@ -161,6 +161,6 @@ struct DOTGraphTraits : public DefaultDOTGraphTraits {
   DOTGraphTraits (bool simple=false) : DefaultDOTGraphTraits (simple) {}
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/DataStream.h b/include/llvm/Support/DataStream.h
index 9a4daec1e9cc..a544316f430d 100644
--- a/include/llvm/Support/DataStream.h
+++ b/include/llvm/Support/DataStream.h
@@ -33,6 +33,6 @@ public:
 
 std::unique_ptr<DataStreamer> getDataFileStreamer(const std::string &Filename,
                                                   std::string *Err);
-} // namespace llvm
+}
 
 #endif  // LLVM_SUPPORT_DATASTREAM_H_
diff --git a/include/llvm/Support/Debug.h b/include/llvm/Support/Debug.h
index 2f3fe77f0e50..fff4f986a6c0 100644
--- a/include/llvm/Support/Debug.h
+++ b/include/llvm/Support/Debug.h
@@ -91,6 +91,6 @@ raw_ostream &dbgs();
 //
 #define DEBUG(X) DEBUG_WITH_TYPE(DEBUG_TYPE, X)
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/Dwarf.h b/include/llvm/Support/Dwarf.h
index c3d94d19f919..17e9c1540a41 100644
--- a/include/llvm/Support/Dwarf.h
+++ b/include/llvm/Support/Dwarf.h
@@ -239,6 +239,11 @@ enum Attribute : uint16_t {
   DW_AT_GNU_pubnames = 0x2134,
   DW_AT_GNU_pubtypes = 0x2135,
 
+  // LLVM project extensions.
+  DW_AT_LLVM_include_path = 0x3e00,
+  DW_AT_LLVM_config_macros = 0x3e01,
+  DW_AT_LLVM_isysroot = 0x3e02,
+
   // Apple extensions.
   DW_AT_APPLE_optimized = 0x3fe1,
   DW_AT_APPLE_flags = 0x3fe2,
diff --git a/include/llvm/Support/DynamicLibrary.h b/include/llvm/Support/DynamicLibrary.h
index d6ff9043c46a..a7d22212dbdb 100644
--- a/include/llvm/Support/DynamicLibrary.h
+++ b/include/llvm/Support/DynamicLibrary.h
@@ -99,7 +99,7 @@ namespace sys {
     static void AddSymbol(StringRef symbolName, void *symbolValue);
   };
 
-} // namespace sys
-} // namespace llvm
+} // End sys namespace
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/ELF.h b/include/llvm/Support/ELF.h
index e23fcbb5eb8c..94a4bfb22025 100644
--- a/include/llvm/Support/ELF.h
+++ b/include/llvm/Support/ELF.h
@@ -308,7 +308,8 @@ enum {
   EM_COGE          = 216, // Cognitive Smart Memory Processor
   EM_COOL          = 217, // iCelero CoolEngine
   EM_NORC          = 218, // Nanoradio Optimized RISC
-  EM_CSR_KALIMBA   = 219  // CSR Kalimba architecture family
+  EM_CSR_KALIMBA   = 219, // CSR Kalimba architecture family
+  EM_AMDGPU        = 224  // AMD GPU architecture
 };
 
 // Object file classes.
@@ -346,6 +347,7 @@ enum {
   ELFOSABI_FENIXOS = 16,      // FenixOS
   ELFOSABI_CLOUDABI = 17,     // Nuxi CloudABI
   ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
+  ELFOSABI_AMDGPU_HSA = 64,   // AMD HSA runtime
   ELFOSABI_C6000_LINUX = 65,  // Linux TMS320C6000
   ELFOSABI_ARM = 97,          // ARM
   ELFOSABI_STANDALONE = 255   // Standalone (embedded) application
@@ -822,9 +824,9 @@ enum {
   STT_FILE    = 4,   // Local, absolute symbol that refers to a file
   STT_COMMON  = 5,   // An uninitialized common block
   STT_TLS     = 6,   // Thread local data object
-  STT_LOOS    = 7,   // Lowest operating system-specific symbol type
-  STT_HIOS    = 8,   // Highest operating system-specific symbol type
   STT_GNU_IFUNC = 10, // GNU indirect function
+  STT_LOOS    = 10,  // Lowest operating system-specific symbol type
+  STT_HIOS    = 12,  // Highest operating system-specific symbol type
   STT_LOPROC  = 13,  // Lowest processor-specific symbol type
   STT_HIPROC  = 15   // Highest processor-specific symbol type
 };
diff --git a/include/llvm/Support/Errc.h b/include/llvm/Support/Errc.h
index 7efca026d1e4..80bfe2ac2ee5 100644
--- a/include/llvm/Support/Errc.h
+++ b/include/llvm/Support/Errc.h
@@ -78,7 +78,7 @@ enum class errc {
 inline std::error_code make_error_code(errc E) {
   return std::error_code(static_cast<int>(E), std::generic_category());
 }
-} // namespace llvm
+}
 
 namespace std {
 template <> struct is_error_code_enum<llvm::errc> : std::true_type {};
diff --git a/include/llvm/Support/ErrorHandling.h b/include/llvm/Support/ErrorHandling.h
index 427d8ea2c570..9afd52d1abc7 100644
--- a/include/llvm/Support/ErrorHandling.h
+++ b/include/llvm/Support/ErrorHandling.h
@@ -84,7 +84,7 @@ namespace llvm {
   LLVM_ATTRIBUTE_NORETURN void
   llvm_unreachable_internal(const char *msg=nullptr, const char *file=nullptr,
                             unsigned line=0);
-} // namespace llvm
+}
 
 /// Marks that the current location is not supposed to be reachable.
 /// In !NDEBUG builds, prints the message and location info to stderr.
diff --git a/include/llvm/Support/FileSystem.h b/include/llvm/Support/FileSystem.h
index 5a857e41b95a..a736c324f8aa 100644
--- a/include/llvm/Support/FileSystem.h
+++ b/include/llvm/Support/FileSystem.h
@@ -724,7 +724,7 @@ namespace detail {
     intptr_t IterationHandle;
     directory_entry CurrentEntry;
   };
-} // namespace detail
+}
 
 /// directory_iterator - Iterates through the entries in path. There is no
 /// operator++ because we need an error_code. If it's really needed we can make
@@ -786,7 +786,7 @@ namespace detail {
     uint16_t Level;
     bool HasNoPushRequest;
   };
-} // namespace detail
+}
 
 /// recursive_directory_iterator - Same as directory_iterator except for it
 /// recurses down into child directories.
diff --git a/include/llvm/Support/FileUtilities.h b/include/llvm/Support/FileUtilities.h
index 8a790dece225..2ee2c60b9964 100644
--- a/include/llvm/Support/FileUtilities.h
+++ b/include/llvm/Support/FileUtilities.h
@@ -73,6 +73,6 @@ namespace llvm {
     /// will not be removed when the object is destroyed.
     void releaseFile() { DeleteIt = false; }
   };
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/FormattedStream.h b/include/llvm/Support/FormattedStream.h
index 145d8984a418..4a135cd23174 100644
--- a/include/llvm/Support/FormattedStream.h
+++ b/include/llvm/Support/FormattedStream.h
@@ -156,7 +156,7 @@ formatted_raw_ostream &ferrs();
 /// debug output.  Use it like: fdbgs() << "foo" << "bar";
 formatted_raw_ostream &fdbgs();
 
-} // namespace llvm
+} // end llvm namespace
 
 
 #endif
diff --git a/include/llvm/Support/GCOV.h b/include/llvm/Support/GCOV.h
index 138b9dbe0a37..c2e34bd3eaeb 100644
--- a/include/llvm/Support/GCOV.h
+++ b/include/llvm/Support/GCOV.h
@@ -435,6 +435,6 @@ private:
   FileCoverageList FileCoverages;
   FuncCoverageMap FuncCoverages;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/GenericDomTree.h b/include/llvm/Support/GenericDomTree.h
index cd59f82eea72..63678bb98bb1 100644
--- a/include/llvm/Support/GenericDomTree.h
+++ b/include/llvm/Support/GenericDomTree.h
@@ -772,6 +772,6 @@ bool DominatorTreeBase<NodeT>::properlyDominates(const NodeT *A,
                    getNode(const_cast<NodeT *>(B)));
 }
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/GenericDomTreeConstruction.h b/include/llvm/Support/GenericDomTreeConstruction.h
index 76e3cc8af40c..7c065f939256 100644
--- a/include/llvm/Support/GenericDomTreeConstruction.h
+++ b/include/llvm/Support/GenericDomTreeConstruction.h
@@ -288,6 +288,6 @@ void Calculate(DominatorTreeBase<typename GraphTraits<NodeT>::NodeType>& DT,
   DT.updateDFSNumbers();
 }
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/GraphWriter.h b/include/llvm/Support/GraphWriter.h
index 04b40848cb76..b1af3d7c2632 100644
--- a/include/llvm/Support/GraphWriter.h
+++ b/include/llvm/Support/GraphWriter.h
@@ -353,9 +353,9 @@ void ViewGraph(const GraphType &G, const Twine &Name,
   if (Filename.empty())
     return;
 
-  DisplayGraph(Filename, true, Program);
+  DisplayGraph(Filename, false, Program);
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/Host.h b/include/llvm/Support/Host.h
index f2519df41aa2..8f4bf3c1ba56 100644
--- a/include/llvm/Support/Host.h
+++ b/include/llvm/Support/Host.h
@@ -68,7 +68,7 @@ namespace sys {
   ///
   /// \return - True on success.
   bool getHostCPUFeatures(StringMap<bool> &Features);
-} // namespace sys
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Support/LineIterator.h b/include/llvm/Support/LineIterator.h
index d0f7d30a7076..9d4cd3bd4c6d 100644
--- a/include/llvm/Support/LineIterator.h
+++ b/include/llvm/Support/LineIterator.h
@@ -83,6 +83,6 @@ private:
   /// \brief Advance the iterator to the next line.
   void advance();
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/MD5.h b/include/llvm/Support/MD5.h
index 8658c8ef5c24..f6e1e92c9fa8 100644
--- a/include/llvm/Support/MD5.h
+++ b/include/llvm/Support/MD5.h
@@ -65,6 +65,6 @@ private:
   const uint8_t *body(ArrayRef<uint8_t> Data);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/ManagedStatic.h b/include/llvm/Support/ManagedStatic.h
index 1187e055aadd..addd34e704bc 100644
--- a/include/llvm/Support/ManagedStatic.h
+++ b/include/llvm/Support/ManagedStatic.h
@@ -106,6 +106,6 @@ struct llvm_shutdown_obj {
   ~llvm_shutdown_obj() { llvm_shutdown(); }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h
index 7c63aaa06998..2cf7e0e5d0b3 100644
--- a/include/llvm/Support/MathExtras.h
+++ b/include/llvm/Support/MathExtras.h
@@ -642,6 +642,6 @@ inline int64_t SignExtend64(uint64_t X, unsigned B) {
 }
 
 extern const float huge_valf;
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/Memory.h b/include/llvm/Support/Memory.h
index 6abb17aff8c6..b4305cb697d0 100644
--- a/include/llvm/Support/Memory.h
+++ b/include/llvm/Support/Memory.h
@@ -155,7 +155,7 @@ namespace sys {
     /// as writable.
     static bool setRangeWritable(const void *Addr, size_t Size);
   };
-} // namespace sys
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Support/MemoryObject.h b/include/llvm/Support/MemoryObject.h
index deff6c1c667f..e0c8749da346 100644
--- a/include/llvm/Support/MemoryObject.h
+++ b/include/llvm/Support/MemoryObject.h
@@ -63,6 +63,6 @@ public:
   virtual bool isValidAddress(uint64_t address) const = 0;
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/MipsABIFlags.h b/include/llvm/Support/MipsABIFlags.h
index 8740823dac42..93f6b416ba88 100644
--- a/include/llvm/Support/MipsABIFlags.h
+++ b/include/llvm/Support/MipsABIFlags.h
@@ -96,7 +96,7 @@ enum Val_GNU_MIPS_ABI_MSA {
   Val_GNU_MIPS_ABI_MSA_ANY = 0, // not tagged
   Val_GNU_MIPS_ABI_MSA_128 = 1  // 128-bit MSA
 };
-} // namespace Mips
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Support/Mutex.h b/include/llvm/Support/Mutex.h
index 47f0ab6d5c6f..0f4e61af4439 100644
--- a/include/llvm/Support/Mutex.h
+++ b/include/llvm/Support/Mutex.h
@@ -152,7 +152,7 @@ namespace llvm
     };
 
     typedef SmartScopedLock<false> ScopedLock;
-  } // namespace sys
-} // namespace llvm
+  }
+}
 
 #endif
diff --git a/include/llvm/Support/MutexGuard.h b/include/llvm/Support/MutexGuard.h
index ea5861761acd..07b64b611960 100644
--- a/include/llvm/Support/MutexGuard.h
+++ b/include/llvm/Support/MutexGuard.h
@@ -36,6 +36,6 @@ namespace llvm {
     /// is held.
     bool holds(const sys::Mutex& lock) const { return &M == &lock; }
   };
-} // namespace llvm
+}
 
 #endif // LLVM_SUPPORT_MUTEXGUARD_H
diff --git a/include/llvm/Support/PluginLoader.h b/include/llvm/Support/PluginLoader.h
index da4324e6c13f..bdbb134b28eb 100644
--- a/include/llvm/Support/PluginLoader.h
+++ b/include/llvm/Support/PluginLoader.h
@@ -32,6 +32,6 @@ namespace llvm {
     LoadOpt("load", cl::ZeroOrMore, cl::value_desc("pluginfilename"),
             cl::desc("Load the specified plugin"));
 #endif
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/Process.h b/include/llvm/Support/Process.h
index 089894cf9020..cfdd06c62f33 100644
--- a/include/llvm/Support/Process.h
+++ b/include/llvm/Support/Process.h
@@ -184,7 +184,7 @@ public:
   static unsigned GetRandomNumber();
 };
 
-} // namespace sys
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Support/Program.h b/include/llvm/Support/Program.h
index 5f1bc12601b1..b89a0f73ec68 100644
--- a/include/llvm/Support/Program.h
+++ b/include/llvm/Support/Program.h
@@ -187,7 +187,7 @@ struct ProcessInfo {
       ///< string is non-empty upon return an error occurred while invoking the
       ///< program.
       );
-  } // namespace sys
-} // namespace llvm
+  }
+}
 
 #endif
diff --git a/include/llvm/Support/RWMutex.h b/include/llvm/Support/RWMutex.h
index 5299708c6a6a..4be931337765 100644
--- a/include/llvm/Support/RWMutex.h
+++ b/include/llvm/Support/RWMutex.h
@@ -171,7 +171,7 @@ namespace llvm
       }
     };
     typedef SmartScopedWriter<false> ScopedWriter;
-  } // namespace sys
-} // namespace llvm
+  }
+}
 
 #endif
diff --git a/include/llvm/Support/RandomNumberGenerator.h b/include/llvm/Support/RandomNumberGenerator.h
index 316778b00e5e..7446558f0c88 100644
--- a/include/llvm/Support/RandomNumberGenerator.h
+++ b/include/llvm/Support/RandomNumberGenerator.h
@@ -53,6 +53,6 @@ private:
 
   friend class Module;
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/Recycler.h b/include/llvm/Support/Recycler.h
index a909b9d57376..e97f36a735fd 100644
--- a/include/llvm/Support/Recycler.h
+++ b/include/llvm/Support/Recycler.h
@@ -123,6 +123,6 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/RecyclingAllocator.h b/include/llvm/Support/RecyclingAllocator.h
index fded4edcad44..001d1cf7c3df 100644
--- a/include/llvm/Support/RecyclingAllocator.h
+++ b/include/llvm/Support/RecyclingAllocator.h
@@ -57,7 +57,7 @@ public:
   }
 };
 
-} // namespace llvm
+}
 
 template<class AllocatorType, class T, size_t Size, size_t Align>
 inline void *operator new(size_t size,
diff --git a/include/llvm/Support/Regex.h b/include/llvm/Support/Regex.h
index 15f20a668ae5..31b35ed0cad6 100644
--- a/include/llvm/Support/Regex.h
+++ b/include/llvm/Support/Regex.h
@@ -100,6 +100,6 @@ namespace llvm {
     struct llvm_regex *preg;
     int error;
   };
-} // namespace llvm
+}
 
 #endif // LLVM_SUPPORT_REGEX_H
diff --git a/include/llvm/Support/Registry.h b/include/llvm/Support/Registry.h
index 7eb1090a393b..95c4e96f7f29 100644
--- a/include/llvm/Support/Registry.h
+++ b/include/llvm/Support/Registry.h
@@ -228,6 +228,6 @@ namespace llvm {
   template <typename T, typename U>
   typename Registry<T,U>::listener *Registry<T,U>::ListenerTail;
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/Signals.h b/include/llvm/Support/Signals.h
index 0cb421bcf32b..7e165d7f3a42 100644
--- a/include/llvm/Support/Signals.h
+++ b/include/llvm/Support/Signals.h
@@ -62,7 +62,7 @@ namespace sys {
   /// different thread on some platforms.
   /// @brief Register a function to be called when ctrl-c is pressed.
   void SetInterruptFunction(void (*IF)());
-} // namespace sys
-} // namespace llvm
+} // End sys namespace
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/SourceMgr.h b/include/llvm/Support/SourceMgr.h
index 5eef9a075c46..1f8b1a01865f 100644
--- a/include/llvm/Support/SourceMgr.h
+++ b/include/llvm/Support/SourceMgr.h
@@ -280,6 +280,6 @@ public:
              bool ShowKindLabel = true) const;
 };
 
-} // namespace llvm
+}  // end llvm namespace
 
 #endif
diff --git a/include/llvm/Support/StreamingMemoryObject.h b/include/llvm/Support/StreamingMemoryObject.h
index fe0cc7e71f97..7cb6438d1342 100644
--- a/include/llvm/Support/StreamingMemoryObject.h
+++ b/include/llvm/Support/StreamingMemoryObject.h
@@ -89,5 +89,5 @@ private:
 MemoryObject *getNonStreamedMemoryObject(
     const unsigned char *Start, const unsigned char *End);
 
-} // namespace llvm
+}
 #endif  // STREAMINGMEMORYOBJECT_H_
diff --git a/include/llvm/Support/StringPool.h b/include/llvm/Support/StringPool.h
index 3aa826b5ae9f..2ec0c3b76c11 100644
--- a/include/llvm/Support/StringPool.h
+++ b/include/llvm/Support/StringPool.h
@@ -133,6 +133,6 @@ namespace llvm {
     inline bool operator!=(const PooledStringPtr &That) const { return S != That.S; }
   };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/StringSaver.h b/include/llvm/Support/StringSaver.h
index c7a2e8f48e86..f3853ee91570 100644
--- a/include/llvm/Support/StringSaver.h
+++ b/include/llvm/Support/StringSaver.h
@@ -38,5 +38,5 @@ class BumpPtrStringSaver final : public StringSaver {
 public:
   BumpPtrStringSaver(BumpPtrAllocator &Alloc) : StringSaver(Alloc) {}
 };
-} // namespace llvm
+}
 #endif
diff --git a/include/llvm/Support/SystemUtils.h b/include/llvm/Support/SystemUtils.h
index f8c5dc85a5e9..2997b1b0c9cf 100644
--- a/include/llvm/Support/SystemUtils.h
+++ b/include/llvm/Support/SystemUtils.h
@@ -27,6 +27,6 @@ bool CheckBitcodeOutputToConsole(
   bool print_warning = true     ///< Control whether warnings are printed
 );
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/TargetParser.h b/include/llvm/Support/TargetParser.h
index 777ee2075d61..dab724895e86 100644
--- a/include/llvm/Support/TargetParser.h
+++ b/include/llvm/Support/TargetParser.h
@@ -36,7 +36,11 @@ namespace ARM {
     FK_VFP,
     FK_VFPV2,
     FK_VFPV3,
+    FK_VFPV3_FP16,
     FK_VFPV3_D16,
+    FK_VFPV3_D16_FP16,
+    FK_VFPV3XD,
+    FK_VFPV3XD_FP16,
     FK_VFPV4,
     FK_VFPV4_D16,
     FK_FPV4_SP_D16,
@@ -44,6 +48,7 @@ namespace ARM {
     FK_FPV5_SP_D16,
     FK_FP_ARMV8,
     FK_NEON,
+    FK_NEON_FP16,
     FK_NEON_VFPV4,
     FK_NEON_FP_ARMV8,
     FK_CRYPTO_NEON_FP_ARMV8,
@@ -51,6 +56,16 @@ namespace ARM {
     FK_LAST
   };
 
+  // FPU Version
+  enum FPUVersion {
+    FV_NONE = 0,
+    FV_VFPV2,
+    FV_VFPV3,
+    FV_VFPV3_FP16,
+    FV_VFPV4,
+    FV_VFPV5
+  };
+
   // An FPU name implies one of three levels of Neon support:
   enum NeonSupportLevel {
     NS_None = 0, ///< No Neon
diff --git a/include/llvm/Support/TargetRegistry.h b/include/llvm/Support/TargetRegistry.h
index 1c11ef31f82c..d2e8b95d74f3 100644
--- a/include/llvm/Support/TargetRegistry.h
+++ b/include/llvm/Support/TargetRegistry.h
@@ -1178,6 +1178,6 @@ private:
     return new MCCodeEmitterImpl();
   }
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/TargetSelect.h b/include/llvm/Support/TargetSelect.h
index 96ecf0b5e5c6..a86e953f00ea 100644
--- a/include/llvm/Support/TargetSelect.h
+++ b/include/llvm/Support/TargetSelect.h
@@ -161,6 +161,6 @@ namespace llvm {
 #endif
   }  
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/ThreadLocal.h b/include/llvm/Support/ThreadLocal.h
index db61f5c17b96..427a67e2a96d 100644
--- a/include/llvm/Support/ThreadLocal.h
+++ b/include/llvm/Support/ThreadLocal.h
@@ -57,7 +57,7 @@ namespace llvm {
       // erase - Removes the pointer associated with the current thread.
       void erase() { removeInstance(); }
     };
-  } // namespace sys
-} // namespace llvm
+  }
+}
 
 #endif
diff --git a/include/llvm/Support/Threading.h b/include/llvm/Support/Threading.h
index 365fb9ee9b8e..3cca1d6a9913 100644
--- a/include/llvm/Support/Threading.h
+++ b/include/llvm/Support/Threading.h
@@ -34,6 +34,6 @@ namespace llvm {
   /// the thread stack.
   void llvm_execute_on_thread(void (*UserFn)(void*), void *UserData,
                               unsigned RequestedStackSize = 0);
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Support/TimeValue.h b/include/llvm/Support/TimeValue.h
index a9efb1b9f78e..6bca58b6bc20 100644
--- a/include/llvm/Support/TimeValue.h
+++ b/include/llvm/Support/TimeValue.h
@@ -380,7 +380,7 @@ inline TimeValue operator - (const TimeValue &tv1, const TimeValue &tv2) {
   return difference;
 }
 
-} // namespace sys
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Support/Timer.h b/include/llvm/Support/Timer.h
index 56fbcccc5cd9..2cd30e2aaf32 100644
--- a/include/llvm/Support/Timer.h
+++ b/include/llvm/Support/Timer.h
@@ -184,6 +184,6 @@ private:
   void PrintQueuedTimers(raw_ostream &OS);
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Support/ToolOutputFile.h b/include/llvm/Support/ToolOutputFile.h
index e7a65456e3de..1be26c2cb58b 100644
--- a/include/llvm/Support/ToolOutputFile.h
+++ b/include/llvm/Support/ToolOutputFile.h
@@ -58,6 +58,6 @@ public:
   void keep() { Installer.Keep = true; }
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/Support/UniqueLock.h b/include/llvm/Support/UniqueLock.h
index c5f37a7b8ce0..529284d3868b 100644
--- a/include/llvm/Support/UniqueLock.h
+++ b/include/llvm/Support/UniqueLock.h
@@ -62,6 +62,6 @@ namespace llvm {
 
     bool owns_lock() { return locked; }
   };
-} // namespace llvm
+}
 
 #endif // LLVM_SUPPORT_UNIQUE_LOCK_H
diff --git a/include/llvm/Support/Valgrind.h b/include/llvm/Support/Valgrind.h
index 7eabca93d6b4..cebf75c49c19 100644
--- a/include/llvm/Support/Valgrind.h
+++ b/include/llvm/Support/Valgrind.h
@@ -67,7 +67,7 @@ namespace sys {
   #define TsanIgnoreWritesBegin()
   #define TsanIgnoreWritesEnd()
 #endif
-} // namespace sys
-} // namespace llvm
+}
+}
 
 #endif
diff --git a/include/llvm/Support/Watchdog.h b/include/llvm/Support/Watchdog.h
index 5642ae2e2322..01e1d926eb95 100644
--- a/include/llvm/Support/Watchdog.h
+++ b/include/llvm/Support/Watchdog.h
@@ -32,7 +32,7 @@ namespace llvm {
       Watchdog(const Watchdog &other) = delete;
       Watchdog &operator=(const Watchdog &other) = delete;
     };
-  } // namespace sys
-} // namespace llvm
+  }
+}
 
 #endif
diff --git a/include/llvm/Support/circular_raw_ostream.h b/include/llvm/Support/circular_raw_ostream.h
index 89d6421e1e33..19f9c2c4b155 100644
--- a/include/llvm/Support/circular_raw_ostream.h
+++ b/include/llvm/Support/circular_raw_ostream.h
@@ -152,7 +152,7 @@ namespace llvm
         delete TheStream;
     }
   };
-} // namespace llvm
+} // end llvm namespace
 
 
 #endif
diff --git a/include/llvm/Support/raw_os_ostream.h b/include/llvm/Support/raw_os_ostream.h
index c13e7792821b..a983aeb90879 100644
--- a/include/llvm/Support/raw_os_ostream.h
+++ b/include/llvm/Support/raw_os_ostream.h
@@ -37,6 +37,6 @@ public:
   ~raw_os_ostream() override;
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/Support/raw_ostream.h b/include/llvm/Support/raw_ostream.h
index 4b4f933aa017..b59317112c44 100644
--- a/include/llvm/Support/raw_ostream.h
+++ b/include/llvm/Support/raw_ostream.h
@@ -545,6 +545,6 @@ public:
   ~buffer_ostream() { OS << str(); }
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/Support/type_traits.h b/include/llvm/Support/type_traits.h
index 6e2e202b0f2d..45465aea004b 100644
--- a/include/llvm/Support/type_traits.h
+++ b/include/llvm/Support/type_traits.h
@@ -91,7 +91,7 @@ struct add_const_past_pointer<
   typedef const typename std::remove_pointer<T>::type *type;
 };
 
-} // namespace llvm
+}
 
 #ifdef LLVM_DEFINED_HAS_FEATURE
 #undef __has_feature
diff --git a/include/llvm/TableGen/Error.h b/include/llvm/TableGen/Error.h
index 2ecc9d26792c..3df658df8809 100644
--- a/include/llvm/TableGen/Error.h
+++ b/include/llvm/TableGen/Error.h
@@ -34,6 +34,6 @@ LLVM_ATTRIBUTE_NORETURN void PrintFatalError(ArrayRef<SMLoc> ErrorLoc,
 extern SourceMgr SrcMgr;
 extern unsigned ErrorsPrinted;
 
-} // namespace llvm
+} // end namespace "llvm"
 
 #endif
diff --git a/include/llvm/TableGen/Record.h b/include/llvm/TableGen/Record.h
index c5a43018d667..717a2a4ba62a 100644
--- a/include/llvm/TableGen/Record.h
+++ b/include/llvm/TableGen/Record.h
@@ -1161,7 +1161,7 @@ class Record {
   // Tracks Record instances. Not owned by Record.
   RecordKeeper &TrackedRecords;
 
-  DefInit *TheInit;
+  std::unique_ptr<DefInit> TheInit;
   bool IsAnonymous;
 
   // Class-instance values can be used by other defs.  For example, Struct<i>
@@ -1184,8 +1184,7 @@ public:
   explicit Record(Init *N, ArrayRef<SMLoc> locs, RecordKeeper &records,
                   bool Anonymous = false) :
     ID(LastID++), Name(N), Locs(locs.begin(), locs.end()),
-    TrackedRecords(records), TheInit(nullptr), IsAnonymous(Anonymous),
-    ResolveFirst(false) {
+    TrackedRecords(records), IsAnonymous(Anonymous), ResolveFirst(false) {
     init();
   }
   explicit Record(const std::string &N, ArrayRef<SMLoc> locs,
@@ -1194,12 +1193,13 @@ public:
 
 
   // When copy-constructing a Record, we must still guarantee a globally unique
-  // ID number.  All other fields can be copied normally.
+  // ID number.  Don't copy TheInit either since it's owned by the original
+  // record. All other fields can be copied normally.
   Record(const Record &O) :
     ID(LastID++), Name(O.Name), Locs(O.Locs), TemplateArgs(O.TemplateArgs),
     Values(O.Values), SuperClasses(O.SuperClasses),
     SuperClassRanges(O.SuperClassRanges), TrackedRecords(O.TrackedRecords),
-    TheInit(O.TheInit), IsAnonymous(O.IsAnonymous),
+    IsAnonymous(O.IsAnonymous),
     ResolveFirst(O.ResolveFirst) { }
 
   static unsigned getNewUID() { return LastID++; }
@@ -1589,6 +1589,6 @@ Init *QualifyName(Record &CurRec, MultiClass *CurMultiClass,
 Init *QualifyName(Record &CurRec, MultiClass *CurMultiClass,
                   const std::string &Name, const std::string &Scoper);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/TableGen/StringMatcher.h b/include/llvm/TableGen/StringMatcher.h
index 5a77f5ee3d29..b43877910834 100644
--- a/include/llvm/TableGen/StringMatcher.h
+++ b/include/llvm/TableGen/StringMatcher.h
@@ -49,6 +49,6 @@ private:
                                 unsigned CharNo, unsigned IndentCount) const;
 };
 
-} // namespace llvm
+} // end llvm namespace.
 
 #endif
diff --git a/include/llvm/Target/TargetCallingConv.h b/include/llvm/Target/TargetCallingConv.h
index 11a2cfdf815b..9d4e7a04d905 100644
--- a/include/llvm/Target/TargetCallingConv.h
+++ b/include/llvm/Target/TargetCallingConv.h
@@ -190,8 +190,8 @@ namespace ISD {
       ArgVT = argvt;
     }
   };
-} // namespace ISD
+}
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetFrameLowering.h b/include/llvm/Target/TargetFrameLowering.h
index 2e8fe217fd12..0e317247a59f 100644
--- a/include/llvm/Target/TargetFrameLowering.h
+++ b/include/llvm/Target/TargetFrameLowering.h
@@ -283,6 +283,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h
index ec7aef3e5aa0..8b314f454b18 100644
--- a/include/llvm/Target/TargetInstrInfo.h
+++ b/include/llvm/Target/TargetInstrInfo.h
@@ -1270,6 +1270,6 @@ private:
   unsigned CallFrameSetupOpcode, CallFrameDestroyOpcode;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetIntrinsicInfo.h b/include/llvm/Target/TargetIntrinsicInfo.h
index 373295930288..c630f5b12a15 100644
--- a/include/llvm/Target/TargetIntrinsicInfo.h
+++ b/include/llvm/Target/TargetIntrinsicInfo.h
@@ -60,6 +60,6 @@ public:
                                    unsigned numTys = 0) const = 0;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index a536e004c0ea..277487fee6bc 100644
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -1235,11 +1235,10 @@ protected:
     HasExtractBitsInsn = hasExtractInsn;
   }
 
-  /// Tells the code generator not to expand sequence of operations into a
-  /// separate sequences that increases the amount of flow control.
-  void setJumpIsExpensive(bool isExpensive = true) {
-    JumpIsExpensive = isExpensive;
-  }
+  /// Tells the code generator not to expand logic operations on comparison
+  /// predicates into separate sequences that increase the amount of flow
+  /// control.
+  void setJumpIsExpensive(bool isExpensive = true);
 
   /// Tells the code generator that integer divide is expensive, and if
   /// possible, should be replaced by an alternate sequence of instructions not
@@ -1597,6 +1596,35 @@ public:
     return false;
   }
 
+  /// \brief Get the maximum supported factor for interleaved memory accesses.
+  /// Default to be the minimum interleave factor: 2.
+  virtual unsigned getMaxSupportedInterleaveFactor() const { return 2; }
+
+  /// \brief Lower an interleaved load to target specific intrinsics. Return
+  /// true on success.
+  ///
+  /// \p LI is the vector load instruction.
+  /// \p Shuffles is the shufflevector list to DE-interleave the loaded vector.
+  /// \p Indices is the corresponding indices for each shufflevector.
+  /// \p Factor is the interleave factor.
+  virtual bool lowerInterleavedLoad(LoadInst *LI,
+                                    ArrayRef<ShuffleVectorInst *> Shuffles,
+                                    ArrayRef<unsigned> Indices,
+                                    unsigned Factor) const {
+    return false;
+  }
+
+  /// \brief Lower an interleaved store to target specific intrinsics. Return
+  /// true on success.
+  ///
+  /// \p SI is the vector store instruction.
+  /// \p SVI is the shufflevector to RE-interleave the stored vector.
+  /// \p Factor is the interleave factor.
+  virtual bool lowerInterleavedStore(StoreInst *SI, ShuffleVectorInst *SVI,
+                                     unsigned Factor) const {
+    return false;
+  }
+
   /// Return true if zero-extending the specific node Val to type VT2 is free
   /// (either because it's implicitly zero-extended such as ARM ldrb / ldrh or
   /// because it's folded such as X86 zero-extending loads).
@@ -2689,8 +2717,6 @@ public:
   //===--------------------------------------------------------------------===//
   // Div utility functions
   //
-  SDValue BuildExactSDIV(SDValue Op1, SDValue Op2, SDLoc dl,
-                         SelectionDAG &DAG) const;
   SDValue BuildSDIV(SDNode *N, const APInt &Divisor, SelectionDAG &DAG,
                     bool IsAfterLegalization,
                     std::vector<SDNode *> *Created) const;
@@ -2801,6 +2827,6 @@ void GetReturnInfo(Type* ReturnType, AttributeSet attr,
                    SmallVectorImpl<ISD::OutputArg> &Outs,
                    const TargetLowering &TLI);
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetLoweringObjectFile.h b/include/llvm/Target/TargetLoweringObjectFile.h
index 2a17bd200f4d..5b626c244ba0 100644
--- a/include/llvm/Target/TargetLoweringObjectFile.h
+++ b/include/llvm/Target/TargetLoweringObjectFile.h
@@ -64,12 +64,6 @@ public:
                                     const TargetMachine &TM,
                                     const MCSymbol *Sym) const;
 
-  /// Extract the dependent library name from a linker option string. Returns
-  /// StringRef() if the option does not specify a library.
-  virtual StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const {
-    return StringRef();
-  }
-
   /// Emit the module flags that the platform cares about.
   virtual void emitModuleFlags(MCStreamer &Streamer,
                                ArrayRef<Module::ModuleFlagEntry> Flags,
@@ -188,6 +182,9 @@ public:
     return nullptr;
   }
 
+  virtual void emitLinkerFlagsForGlobal(raw_ostream &OS, const GlobalValue *GV,
+                                        const Mangler &Mang) const {}
+
 protected:
   virtual MCSection *SelectSectionForGlobal(const GlobalValue *GV,
                                             SectionKind Kind, Mangler &Mang,
diff --git a/include/llvm/Target/TargetMachine.h b/include/llvm/Target/TargetMachine.h
index 768157549043..64a923b80edf 100644
--- a/include/llvm/Target/TargetMachine.h
+++ b/include/llvm/Target/TargetMachine.h
@@ -273,6 +273,6 @@ public:
                          bool DisableVerify = true) override;
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetOptions.h b/include/llvm/Target/TargetOptions.h
index f27411e47412..d52cb60cf108 100644
--- a/include/llvm/Target/TargetOptions.h
+++ b/include/llvm/Target/TargetOptions.h
@@ -72,7 +72,7 @@ namespace llvm {
           UseInitArray(false), DisableIntegratedAS(false),
           CompressDebugSections(false), FunctionSections(false),
           DataSections(false), UniqueSectionNames(true), TrapUnreachable(false),
-          TrapFuncName(), FloatABIType(FloatABI::Default),
+          FloatABIType(FloatABI::Default),
           AllowFPOpFusion(FPOpFusion::Standard), Reciprocals(TargetRecip()),
           JTType(JumpTable::Single),
           ThreadModel(ThreadModel::POSIX) {}
@@ -172,12 +172,6 @@ namespace llvm {
     /// Emit target-specific trap instruction for 'unreachable' IR instructions.
     unsigned TrapUnreachable : 1;
 
-    /// getTrapFunctionName - If this returns a non-empty string, this means
-    /// isel should lower Intrinsic::trap to a call to the specified function
-    /// name instead of an ISD::TRAP node.
-    std::string TrapFuncName;
-    StringRef getTrapFunctionName() const;
-
     /// FloatABIType - This setting is set by -float-abi=xxx option is specfied
     /// on the command line. This setting may either be Default, Soft, or Hard.
     /// Default selects the target's default behavior. Soft selects the ABI for
@@ -237,7 +231,6 @@ inline bool operator==(const TargetOptions &LHS,
     ARE_EQUAL(PositionIndependentExecutable) &&
     ARE_EQUAL(UseInitArray) &&
     ARE_EQUAL(TrapUnreachable) &&
-    ARE_EQUAL(TrapFuncName) &&
     ARE_EQUAL(FloatABIType) &&
     ARE_EQUAL(AllowFPOpFusion) &&
     ARE_EQUAL(Reciprocals) &&
@@ -252,6 +245,6 @@ inline bool operator!=(const TargetOptions &LHS,
   return !(LHS == RHS);
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetRecip.h b/include/llvm/Target/TargetRecip.h
index c3beb40fca00..4cc3672d758d 100644
--- a/include/llvm/Target/TargetRecip.h
+++ b/include/llvm/Target/TargetRecip.h
@@ -68,6 +68,6 @@ private:
   void parseIndividualParams(const std::vector<std::string> &Args);
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetRegisterInfo.h b/include/llvm/Target/TargetRegisterInfo.h
index 1377b38799b6..0ee936a76211 100644
--- a/include/llvm/Target/TargetRegisterInfo.h
+++ b/include/llvm/Target/TargetRegisterInfo.h
@@ -469,6 +469,10 @@ public:
     return nullptr;
   }
 
+  /// Return all the call-preserved register masks defined for this target.
+  virtual ArrayRef<const uint32_t *> getRegMasks() const = 0;
+  virtual ArrayRef<const char *> getRegMaskNames() const = 0;
+
   /// getReservedRegs - Returns a bitset indexed by physical register number
   /// indicating if a register is a special register that has particular uses
   /// and should be considered unavailable at all times, e.g. SP, RA. This is
@@ -998,6 +1002,6 @@ static inline raw_ostream &operator<<(raw_ostream &OS,
   return OS;
 }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetSelectionDAG.td b/include/llvm/Target/TargetSelectionDAG.td
index 7a788cef0237..4abbe3793995 100644
--- a/include/llvm/Target/TargetSelectionDAG.td
+++ b/include/llvm/Target/TargetSelectionDAG.td
@@ -341,6 +341,7 @@ def externalsym : SDNode<"ISD::ExternalSymbol",       SDTPtrLeaf, [],
                          "ExternalSymbolSDNode">;
 def texternalsym: SDNode<"ISD::TargetExternalSymbol", SDTPtrLeaf, [],
                          "ExternalSymbolSDNode">;
+def mcsym: SDNode<"ISD::MCSymbol", SDTPtrLeaf, [], "MCSymbolSDNode">;
 def blockaddress : SDNode<"ISD::BlockAddress",        SDTPtrLeaf, [],
                          "BlockAddressSDNode">;
 def tblockaddress: SDNode<"ISD::TargetBlockAddress",  SDTPtrLeaf, [],
diff --git a/include/llvm/Target/TargetSelectionDAGInfo.h b/include/llvm/Target/TargetSelectionDAGInfo.h
index c3343caedd18..bacdd950705b 100644
--- a/include/llvm/Target/TargetSelectionDAGInfo.h
+++ b/include/llvm/Target/TargetSelectionDAGInfo.h
@@ -163,6 +163,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // end llvm namespace
 
 #endif
diff --git a/include/llvm/Target/TargetSubtargetInfo.h b/include/llvm/Target/TargetSubtargetInfo.h
index 640e1123e928..e42c56add7b1 100644
--- a/include/llvm/Target/TargetSubtargetInfo.h
+++ b/include/llvm/Target/TargetSubtargetInfo.h
@@ -178,6 +178,6 @@ public:
   virtual bool enableSubRegLiveness() const { return false; }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/IPO.h b/include/llvm/Transforms/IPO.h
index 59cd921820a2..fbd999cbc946 100644
--- a/include/llvm/Transforms/IPO.h
+++ b/include/llvm/Transforms/IPO.h
@@ -203,6 +203,6 @@ ModulePass *createBarrierNoopPass();
 /// to bitsets.
 ModulePass *createLowerBitSetsPass();
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/IPO/InlinerPass.h b/include/llvm/Transforms/IPO/InlinerPass.h
index 4abb92d21537..6a644ad4a63b 100644
--- a/include/llvm/Transforms/IPO/InlinerPass.h
+++ b/include/llvm/Transforms/IPO/InlinerPass.h
@@ -86,6 +86,6 @@ private:
   bool shouldInline(CallSite CS);
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/InstCombine/InstCombine.h b/include/llvm/Transforms/InstCombine/InstCombine.h
index cfb31569f13e..f48ec13107bc 100644
--- a/include/llvm/Transforms/InstCombine/InstCombine.h
+++ b/include/llvm/Transforms/InstCombine/InstCombine.h
@@ -41,6 +41,6 @@ public:
   PreservedAnalyses run(Function &F, AnalysisManager<Function> *AM);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Instrumentation.h b/include/llvm/Transforms/Instrumentation.h
index 4447d0da900c..250e3893cb15 100644
--- a/include/llvm/Transforms/Instrumentation.h
+++ b/include/llvm/Transforms/Instrumentation.h
@@ -136,6 +136,6 @@ FunctionPass *createBoundsCheckingPass();
 /// protect against stack-based overflow vulnerabilities.
 FunctionPass *createSafeStackPass();
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/ObjCARC.h b/include/llvm/Transforms/ObjCARC.h
index 367cdf6e47c7..1897adc2ffbf 100644
--- a/include/llvm/Transforms/ObjCARC.h
+++ b/include/llvm/Transforms/ObjCARC.h
@@ -43,6 +43,6 @@ Pass *createObjCARCContractPass();
 //
 Pass *createObjCARCOptPass();
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Scalar.h b/include/llvm/Transforms/Scalar.h
index 99fff376ecd1..4676c95d7cd4 100644
--- a/include/llvm/Transforms/Scalar.h
+++ b/include/llvm/Transforms/Scalar.h
@@ -486,6 +486,6 @@ FunctionPass *createNaryReassociatePass();
 //
 FunctionPass *createLoopDistributePass();
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Scalar/EarlyCSE.h b/include/llvm/Transforms/Scalar/EarlyCSE.h
index 5cd4a69cafab..e3dd3c050df6 100644
--- a/include/llvm/Transforms/Scalar/EarlyCSE.h
+++ b/include/llvm/Transforms/Scalar/EarlyCSE.h
@@ -34,6 +34,6 @@ public:
   PreservedAnalyses run(Function &F, AnalysisManager<Function> *AM);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h b/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h
index ce3674267b66..40283203f3a3 100644
--- a/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h
+++ b/include/llvm/Transforms/Scalar/LowerExpectIntrinsic.h
@@ -35,6 +35,6 @@ public:
   PreservedAnalyses run(Function &F);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Scalar/SimplifyCFG.h b/include/llvm/Transforms/Scalar/SimplifyCFG.h
index d8b638de70f4..ef28e0f78a4c 100644
--- a/include/llvm/Transforms/Scalar/SimplifyCFG.h
+++ b/include/llvm/Transforms/Scalar/SimplifyCFG.h
@@ -41,6 +41,6 @@ public:
   PreservedAnalyses run(Function &F, AnalysisManager<Function> *AM);
 };
 
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Utils/ASanStackFrameLayout.h b/include/llvm/Transforms/Utils/ASanStackFrameLayout.h
index 7f6a264b29de..4e4f02c84ece 100644
--- a/include/llvm/Transforms/Utils/ASanStackFrameLayout.h
+++ b/include/llvm/Transforms/Utils/ASanStackFrameLayout.h
@@ -59,6 +59,6 @@ void ComputeASanStackFrameLayout(
     // The result is put here.
     ASanStackFrameLayout *Layout);
 
-} // namespace llvm
+} // llvm namespace
 
 #endif  // LLVM_TRANSFORMS_UTILS_ASANSTACKFRAMELAYOUT_H
diff --git a/include/llvm/Transforms/Utils/BasicBlockUtils.h b/include/llvm/Transforms/Utils/BasicBlockUtils.h
index 3004f9eba5ae..9b919b62ee41 100644
--- a/include/llvm/Transforms/Utils/BasicBlockUtils.h
+++ b/include/llvm/Transforms/Utils/BasicBlockUtils.h
@@ -64,14 +64,16 @@ void ReplaceInstWithValue(BasicBlock::InstListType &BIL,
                           BasicBlock::iterator &BI, Value *V);
 
 // ReplaceInstWithInst - Replace the instruction specified by BI with the
-// instruction specified by I.  The original instruction is deleted and BI is
+// instruction specified by I. Copies DebugLoc from BI to I, if I doesn't
+// already have a DebugLoc. The original instruction is deleted and BI is
 // updated to point to the new instruction.
 //
 void ReplaceInstWithInst(BasicBlock::InstListType &BIL,
                          BasicBlock::iterator &BI, Instruction *I);
 
 // ReplaceInstWithInst - Replace the instruction specified by From with the
-// instruction specified by To.
+// instruction specified by To. Copies DebugLoc from BI to I, if I doesn't
+// already have a DebugLoc.
 //
 void ReplaceInstWithInst(Instruction *From, Instruction *To);
 
@@ -308,6 +310,6 @@ void SplitBlockAndInsertIfThenElse(Value *Cond, Instruction *SplitBefore,
 /// entered if the condition is false.
 Value *GetIfCondition(BasicBlock *BB, BasicBlock *&IfTrue,
                       BasicBlock *&IfFalse);
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/BuildLibCalls.h b/include/llvm/Transforms/Utils/BuildLibCalls.h
index 508122949b6b..879f295caf0c 100644
--- a/include/llvm/Transforms/Utils/BuildLibCalls.h
+++ b/include/llvm/Transforms/Utils/BuildLibCalls.h
@@ -111,6 +111,6 @@ namespace llvm {
   /// a pointer, Size is an 'intptr_t', and File is a pointer to FILE.
   Value *EmitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilder<> &B,
                     const DataLayout &DL, const TargetLibraryInfo *TLI);
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Utils/Cloning.h b/include/llvm/Transforms/Utils/Cloning.h
index 9ba6bea499f6..cb187ec103d0 100644
--- a/include/llvm/Transforms/Utils/Cloning.h
+++ b/include/llvm/Transforms/Utils/Cloning.h
@@ -233,6 +233,6 @@ bool InlineFunction(InvokeInst *II, InlineFunctionInfo &IFI,
 bool InlineFunction(CallSite CS, InlineFunctionInfo &IFI,
                     bool InsertLifetime = true);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/CodeExtractor.h b/include/llvm/Transforms/Utils/CodeExtractor.h
index c3c2f3e793ac..3a96d955cac2 100644
--- a/include/llvm/Transforms/Utils/CodeExtractor.h
+++ b/include/llvm/Transforms/Utils/CodeExtractor.h
@@ -121,6 +121,6 @@ namespace llvm {
                                     ValueSet &inputs,
                                     ValueSet &outputs);
   };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Utils/CtorUtils.h b/include/llvm/Transforms/Utils/CtorUtils.h
index 1213324af19f..63e564dcb87a 100644
--- a/include/llvm/Transforms/Utils/CtorUtils.h
+++ b/include/llvm/Transforms/Utils/CtorUtils.h
@@ -27,6 +27,6 @@ class Module;
 bool optimizeGlobalCtorsList(Module &M,
                              function_ref<bool(Function *)> ShouldRemove);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/GlobalStatus.h b/include/llvm/Transforms/Utils/GlobalStatus.h
index 658449c9fab1..c36609508808 100644
--- a/include/llvm/Transforms/Utils/GlobalStatus.h
+++ b/include/llvm/Transforms/Utils/GlobalStatus.h
@@ -77,6 +77,6 @@ struct GlobalStatus {
 
   GlobalStatus();
 };
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Utils/IntegerDivision.h b/include/llvm/Transforms/Utils/IntegerDivision.h
index 5ba6685fdc69..0ec3321b9cf8 100644
--- a/include/llvm/Transforms/Utils/IntegerDivision.h
+++ b/include/llvm/Transforms/Utils/IntegerDivision.h
@@ -68,6 +68,6 @@ namespace llvm {
   /// @brief Replace Rem with generated code.
   bool expandDivisionUpTo64Bits(BinaryOperator *Div);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/Local.h b/include/llvm/Transforms/Utils/Local.h
index 1063f5fa9f07..a1bb367ac7b6 100644
--- a/include/llvm/Transforms/Utils/Local.h
+++ b/include/llvm/Transforms/Utils/Local.h
@@ -291,6 +291,6 @@ void combineMetadata(Instruction *K, const Instruction *J, ArrayRef<unsigned> Kn
 /// the given edge.  Returns the number of replacements made.
 unsigned replaceDominatedUsesWith(Value *From, Value *To, DominatorTree &DT,
                                   const BasicBlockEdge &Edge);
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/LoopUtils.h b/include/llvm/Transforms/Utils/LoopUtils.h
index 3aa40cfaa25a..15747bc7f1ac 100644
--- a/include/llvm/Transforms/Utils/LoopUtils.h
+++ b/include/llvm/Transforms/Utils/LoopUtils.h
@@ -263,6 +263,6 @@ void computeLICMSafetyInfo(LICMSafetyInfo *, Loop *);
 /// variable. Returns true if this is an induction PHI along with the step
 /// value.
 bool isInductionPHI(PHINode *, ScalarEvolution *, ConstantInt *&);
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Utils/ModuleUtils.h b/include/llvm/Transforms/Utils/ModuleUtils.h
index 120d14ab87bb..622265bae143 100644
--- a/include/llvm/Transforms/Utils/ModuleUtils.h
+++ b/include/llvm/Transforms/Utils/ModuleUtils.h
@@ -57,6 +57,6 @@ Function *checkSanitizerInterfaceFunction(Constant *FuncOrBitcast);
 std::pair<Function *, Function *> createSanitizerCtorAndInitFunctions(
     Module &M, StringRef CtorName, StringRef InitName,
     ArrayRef<Type *> InitArgTypes, ArrayRef<Value *> InitArgs);
-} // namespace llvm
+} // End llvm namespace
 
 #endif //  LLVM_TRANSFORMS_UTILS_MODULEUTILS_H
diff --git a/include/llvm/Transforms/Utils/PromoteMemToReg.h b/include/llvm/Transforms/Utils/PromoteMemToReg.h
index 6c3d2ea9b439..d0602bf47c92 100644
--- a/include/llvm/Transforms/Utils/PromoteMemToReg.h
+++ b/include/llvm/Transforms/Utils/PromoteMemToReg.h
@@ -45,6 +45,6 @@ void PromoteMemToReg(ArrayRef<AllocaInst *> Allocas, DominatorTree &DT,
                      AliasSetTracker *AST = nullptr,
                      AssumptionCache *AC = nullptr);
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/SSAUpdater.h b/include/llvm/Transforms/Utils/SSAUpdater.h
index 5179d587176f..1c7b2c587a36 100644
--- a/include/llvm/Transforms/Utils/SSAUpdater.h
+++ b/include/llvm/Transforms/Utils/SSAUpdater.h
@@ -173,6 +173,6 @@ public:
   }
 };
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/SSAUpdaterImpl.h b/include/llvm/Transforms/Utils/SSAUpdaterImpl.h
index 1b9cb48a83c6..ed0841c46c27 100644
--- a/include/llvm/Transforms/Utils/SSAUpdaterImpl.h
+++ b/include/llvm/Transforms/Utils/SSAUpdaterImpl.h
@@ -455,6 +455,6 @@ public:
 
 #undef DEBUG_TYPE // "ssaupdater"
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/SimplifyLibCalls.h b/include/llvm/Transforms/Utils/SimplifyLibCalls.h
index d7c8338bafb5..41159603aae5 100644
--- a/include/llvm/Transforms/Utils/SimplifyLibCalls.h
+++ b/include/llvm/Transforms/Utils/SimplifyLibCalls.h
@@ -166,6 +166,6 @@ private:
   /// function by checking for an existing function with name FuncName + f
   bool hasFloatVersion(StringRef FuncName);
 };
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/SymbolRewriter.h b/include/llvm/Transforms/Utils/SymbolRewriter.h
index d79835857873..5ccee98f97e7 100644
--- a/include/llvm/Transforms/Utils/SymbolRewriter.h
+++ b/include/llvm/Transforms/Utils/SymbolRewriter.h
@@ -108,7 +108,7 @@ private:
                                          yaml::MappingNode *V,
                                          RewriteDescriptorList *DL);
 };
-} // namespace SymbolRewriter
+}
 
 template <>
 struct ilist_traits<SymbolRewriter::RewriteDescriptor>
@@ -147,6 +147,6 @@ public:
 
 ModulePass *createRewriteSymbolsPass();
 ModulePass *createRewriteSymbolsPass(SymbolRewriter::RewriteDescriptorList &);
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Utils/UnifyFunctionExitNodes.h b/include/llvm/Transforms/Utils/UnifyFunctionExitNodes.h
index b19c6fab70e5..550292f6b7a3 100644
--- a/include/llvm/Transforms/Utils/UnifyFunctionExitNodes.h
+++ b/include/llvm/Transforms/Utils/UnifyFunctionExitNodes.h
@@ -47,6 +47,6 @@ public:
 
 Pass *createUnifyFunctionExitNodesPass();
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/UnrollLoop.h b/include/llvm/Transforms/Utils/UnrollLoop.h
index ba5866876e7a..7f2cf8d7f59e 100644
--- a/include/llvm/Transforms/Utils/UnrollLoop.h
+++ b/include/llvm/Transforms/Utils/UnrollLoop.h
@@ -37,6 +37,6 @@ bool UnrollRuntimeLoopProlog(Loop *L, unsigned Count,
                              LPPassManager *LPM);
 
 MDNode *GetUnrollMetadata(MDNode *LoopID, StringRef Name);
-} // namespace llvm
+}
 
 #endif
diff --git a/include/llvm/Transforms/Utils/ValueMapper.h b/include/llvm/Transforms/Utils/ValueMapper.h
index 737ad4f7ed80..047ab818711b 100644
--- a/include/llvm/Transforms/Utils/ValueMapper.h
+++ b/include/llvm/Transforms/Utils/ValueMapper.h
@@ -96,6 +96,6 @@ namespace llvm {
                                    Materializer));
   }
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/Transforms/Utils/VectorUtils.h b/include/llvm/Transforms/Utils/VectorUtils.h
deleted file mode 100644
index 6a35247950d3..000000000000
--- a/include/llvm/Transforms/Utils/VectorUtils.h
+++ /dev/null
@@ -1,205 +0,0 @@
-//===- llvm/Transforms/Utils/VectorUtils.h - Vector utilities -*- C++ -*-=====//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines some vectorizer utilities.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_TRANSFORMS_UTILS_VECTORUTILS_H
-#define LLVM_TRANSFORMS_UTILS_VECTORUTILS_H
-
-#include "llvm/Analysis/TargetLibraryInfo.h"
-#include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/Intrinsics.h"
-
-namespace llvm {
-
-/// \brief Identify if the intrinsic is trivially vectorizable.
-///
-/// This method returns true if the intrinsic's argument types are all
-/// scalars for the scalar form of the intrinsic and all vectors for
-/// the vector form of the intrinsic.
-static inline bool isTriviallyVectorizable(Intrinsic::ID ID) {
-  switch (ID) {
-  case Intrinsic::sqrt:
-  case Intrinsic::sin:
-  case Intrinsic::cos:
-  case Intrinsic::exp:
-  case Intrinsic::exp2:
-  case Intrinsic::log:
-  case Intrinsic::log10:
-  case Intrinsic::log2:
-  case Intrinsic::fabs:
-  case Intrinsic::minnum:
-  case Intrinsic::maxnum:
-  case Intrinsic::copysign:
-  case Intrinsic::floor:
-  case Intrinsic::ceil:
-  case Intrinsic::trunc:
-  case Intrinsic::rint:
-  case Intrinsic::nearbyint:
-  case Intrinsic::round:
-  case Intrinsic::bswap:
-  case Intrinsic::ctpop:
-  case Intrinsic::pow:
-  case Intrinsic::fma:
-  case Intrinsic::fmuladd:
-  case Intrinsic::ctlz:
-  case Intrinsic::cttz:
-  case Intrinsic::powi:
-    return true;
-  default:
-    return false;
-  }
-}
-
-static inline bool hasVectorInstrinsicScalarOpd(Intrinsic::ID ID,
-                                         unsigned ScalarOpdIdx) {
-  switch (ID) {
-    case Intrinsic::ctlz:
-    case Intrinsic::cttz:
-    case Intrinsic::powi:
-      return (ScalarOpdIdx == 1);
-    default:
-      return false;
-  }
-}
-
-static Intrinsic::ID checkUnaryFloatSignature(const CallInst &I,
-                                              Intrinsic::ID ValidIntrinsicID) {
-  if (I.getNumArgOperands() != 1 ||
-      !I.getArgOperand(0)->getType()->isFloatingPointTy() ||
-      I.getType() != I.getArgOperand(0)->getType() ||
-      !I.onlyReadsMemory())
-    return Intrinsic::not_intrinsic;
-
-  return ValidIntrinsicID;
-}
-
-static Intrinsic::ID checkBinaryFloatSignature(const CallInst &I,
-                                               Intrinsic::ID ValidIntrinsicID) {
-  if (I.getNumArgOperands() != 2 ||
-      !I.getArgOperand(0)->getType()->isFloatingPointTy() ||
-      !I.getArgOperand(1)->getType()->isFloatingPointTy() ||
-      I.getType() != I.getArgOperand(0)->getType() ||
-      I.getType() != I.getArgOperand(1)->getType() ||
-      !I.onlyReadsMemory())
-    return Intrinsic::not_intrinsic;
-
-  return ValidIntrinsicID;
-}
-
-static Intrinsic::ID
-getIntrinsicIDForCall(CallInst *CI, const TargetLibraryInfo *TLI) {
-  // If we have an intrinsic call, check if it is trivially vectorizable.
-  if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(CI)) {
-    Intrinsic::ID ID = II->getIntrinsicID();
-    if (isTriviallyVectorizable(ID) || ID == Intrinsic::lifetime_start ||
-        ID == Intrinsic::lifetime_end || ID == Intrinsic::assume)
-      return ID;
-    else
-      return Intrinsic::not_intrinsic;
-  }
-
-  if (!TLI)
-    return Intrinsic::not_intrinsic;
-
-  LibFunc::Func Func;
-  Function *F = CI->getCalledFunction();
-  // We're going to make assumptions on the semantics of the functions, check
-  // that the target knows that it's available in this environment and it does
-  // not have local linkage.
-  if (!F || F->hasLocalLinkage() || !TLI->getLibFunc(F->getName(), Func))
-    return Intrinsic::not_intrinsic;
-
-  // Otherwise check if we have a call to a function that can be turned into a
-  // vector intrinsic.
-  switch (Func) {
-  default:
-    break;
-  case LibFunc::sin:
-  case LibFunc::sinf:
-  case LibFunc::sinl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::sin);
-  case LibFunc::cos:
-  case LibFunc::cosf:
-  case LibFunc::cosl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::cos);
-  case LibFunc::exp:
-  case LibFunc::expf:
-  case LibFunc::expl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::exp);
-  case LibFunc::exp2:
-  case LibFunc::exp2f:
-  case LibFunc::exp2l:
-    return checkUnaryFloatSignature(*CI, Intrinsic::exp2);
-  case LibFunc::log:
-  case LibFunc::logf:
-  case LibFunc::logl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::log);
-  case LibFunc::log10:
-  case LibFunc::log10f:
-  case LibFunc::log10l:
-    return checkUnaryFloatSignature(*CI, Intrinsic::log10);
-  case LibFunc::log2:
-  case LibFunc::log2f:
-  case LibFunc::log2l:
-    return checkUnaryFloatSignature(*CI, Intrinsic::log2);
-  case LibFunc::fabs:
-  case LibFunc::fabsf:
-  case LibFunc::fabsl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::fabs);
-  case LibFunc::fmin:
-  case LibFunc::fminf:
-  case LibFunc::fminl:
-    return checkBinaryFloatSignature(*CI, Intrinsic::minnum);
-  case LibFunc::fmax:
-  case LibFunc::fmaxf:
-  case LibFunc::fmaxl:
-    return checkBinaryFloatSignature(*CI, Intrinsic::maxnum);
-  case LibFunc::copysign:
-  case LibFunc::copysignf:
-  case LibFunc::copysignl:
-    return checkBinaryFloatSignature(*CI, Intrinsic::copysign);
-  case LibFunc::floor:
-  case LibFunc::floorf:
-  case LibFunc::floorl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::floor);
-  case LibFunc::ceil:
-  case LibFunc::ceilf:
-  case LibFunc::ceill:
-    return checkUnaryFloatSignature(*CI, Intrinsic::ceil);
-  case LibFunc::trunc:
-  case LibFunc::truncf:
-  case LibFunc::truncl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::trunc);
-  case LibFunc::rint:
-  case LibFunc::rintf:
-  case LibFunc::rintl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::rint);
-  case LibFunc::nearbyint:
-  case LibFunc::nearbyintf:
-  case LibFunc::nearbyintl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::nearbyint);
-  case LibFunc::round:
-  case LibFunc::roundf:
-  case LibFunc::roundl:
-    return checkUnaryFloatSignature(*CI, Intrinsic::round);
-  case LibFunc::pow:
-  case LibFunc::powf:
-  case LibFunc::powl:
-    return checkBinaryFloatSignature(*CI, Intrinsic::pow);
-  }
-
-  return Intrinsic::not_intrinsic;
-}
-
-} // namespace llvm
-
-#endif
diff --git a/include/llvm/Transforms/Vectorize.h b/include/llvm/Transforms/Vectorize.h
index aab2790c0ab1..aec3993d68fc 100644
--- a/include/llvm/Transforms/Vectorize.h
+++ b/include/llvm/Transforms/Vectorize.h
@@ -139,6 +139,6 @@ Pass *createSLPVectorizerPass();
 bool vectorizeBasicBlock(Pass *P, BasicBlock &BB,
                          const VectorizeConfig &C = VectorizeConfig());
 
-} // namespace llvm
+} // End llvm namespace
 
 #endif
diff --git a/include/llvm/module.modulemap b/include/llvm/module.modulemap
index a9e6daf4977e..dcc5ce1059ff 100644
--- a/include/llvm/module.modulemap
+++ b/include/llvm/module.modulemap
@@ -124,6 +124,7 @@ module LLVM_IR {
   textual header "IR/DebugInfoFlags.def"
   textual header "IR/Instruction.def"
   textual header "IR/Metadata.def"
+  textual header "IR/Value.def"
 }
 
 module LLVM_IRReader { requires cplusplus umbrella "IRReader" module * { export * } }