Merge llvm-project 12.0.1 release and follow-up fixes

Merge llvm-project main llvmorg-12-init-17869-g8e464dd76bef

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-12-init-17869-g8e464dd76bef, the last commit before the
upstream release/12.x branch was created.

PR:		255570

(cherry picked from commit e8d8bef961a50d4dc22501cde4fb9fb0be1b2532)

Merge llvm-project 12.0.0 release

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-12.0.0-0-gd28af7c654d8, a.k.a. 12.0.0 release.

PR:		255570

(cherry picked from commit d409305fa3838fb39b38c26fc085fb729b8766d5)

Disable strict-fp for powerpcspe, as it does not work properly yet

Merge commit 5c18d1136665 from llvm git (by Qiu Chaofan)

  [SPE] Disable strict-fp for SPE by default

  As discussed in PR50385, strict-fp on PowerPC SPE has not been
  handled well. This patch disables it by default for SPE.

  Reviewed By: nemanjai, vit9696, jhibbits

  Differential Revision: https://reviews.llvm.org/D103235

PR:		255570

(cherry picked from commit 715df83abc049b23d9acddc81f2480bd4c056d64)

Apply upstream libc++ fix to allow building with devel/xxx-xtoolchain-gcc

Merge commit 52e9d80d5db2 from llvm git (by Jason Liu):

  [libc++] add `inline` for __open's definition in ifstream and ofstream

  Summary:

  When building with gcc on AIX, it seems that gcc does not like the
  `always_inline` without the `inline` keyword.
  So adding the inline keywords in for __open in ifstream and ofstream.
  That will also make it consistent with __open in basic_filebuf
  (it seems we added `inline` there before for gcc build as well).

  Differential Revision: https://reviews.llvm.org/D99422

PR:		255570

(cherry picked from commit d099db25464b826c5724cf2fb5b22292bbe15f6e)

Undefine HAVE_(DE)REGISTER_FRAME in llvm's config.h on arm

Otherwise, the lli tool (enable by WITH_CLANG_EXTRAS) won't link on arm,
stating that __register_frame is undefined. This function is normally
provided by libunwind, but explicitly not for the ARM Exception ABI.

Reported by:	oh
PR:		255570

(cherry picked from commit f336b45e943c7f9a90ffcea1a6c4c7039e54c73c)

Merge llvm-project 12.0.1 rc2

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-12.0.1-rc2-0-ge7dac564cd0e, a.k.a. 12.0.1 rc2.

PR:		255570

(cherry picked from commit 23408297fbf3089f0388a8873b02fa75ab3f5bb9)

Revert libunwind change to fix backtrace segfault on aarch64

Revert commit 22b615a96593 from llvm git (by Daniel Kiss):

  [libunwind] Support for leaf function unwinding.

  Unwinding leaf function is useful in cases when the backtrace finds a
  leaf function for example when it caused a signal.
  This patch also add the support for the DW_CFA_undefined because it marks
  the end of the frames.

  Ryan Prichard provided code for the tests.

  Reviewed By: #libunwind, mstorsjo

  Differential Revision: https://reviews.llvm.org/D83573

  Reland with limit the test to the x86_64-linux target.

Bisection has shown that this particular upstream commit causes programs
using backtrace(3) on aarch64 to segfault. This affects the lang/rust
port, for instance. Until we can upstream to fix this problem, revert
the commit for now.

Reported by:	mikael
PR:		256864

(cherry picked from commit 5866c369e4fd917c0d456f0f10b92ee354b82279)

Merge llvm-project 12.0.1 release

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-12.0.1-0-gfed41342a82f, a.k.a. 12.0.1 release.

PR:		255570

(cherry picked from commit 4652422eb477731f284b1345afeefef7f269da50)

compilert-rt: build out-of-line LSE atomics helpers for aarch64

Both clang >= 12 and gcc >= 10.1 now default to -moutline-atomics for
aarch64. This requires a bunch of helper functions in libcompiler_rt.a,
to avoid link errors like "undefined symbol: __aarch64_ldadd8_acq_rel".

(Note: of course you can use -mno-outline-atomics as a workaround too,
but this would negate the potential performance benefit of the faster
LSE instructions.)

Bump __FreeBSD_version so ports maintainers can easily detect this.

PR:		257392

(cherry picked from commit cc55ee8009a550810d38777fd6ace9abf3a2f6b4)

1 files changed, 36 insertions, 41 deletions

diff --git a/contrib/llvm-project/lldb/source/Breakpoint/BreakpointSite.cpp b/contrib/llvm-project/lldb/source/Breakpoint/BreakpointSite.cpp
index a33fd0a1c462..fb3f0cd06897 100644
--- a/contrib/llvm-project/lldb/source/Breakpoint/BreakpointSite.cpp
+++ b/contrib/llvm-project/lldb/source/Breakpoint/BreakpointSite.cpp
@@ -21,7 +21,7 @@ using namespace lldb_private;
 BreakpointSite::BreakpointSite(BreakpointSiteList *list,
                                const BreakpointLocationSP &owner,
                                lldb::addr_t addr, bool use_hardware)
-    : StoppointLocation(GetNextID(), addr, 0, use_hardware),
+    : StoppointSite(GetNextID(), addr, 0, use_hardware),
       m_type(eSoftware), // Process subclasses need to set this correctly using
                          // SetType()
       m_saved_opcode(), m_trap_opcode(),
@@ -48,7 +48,7 @@ break_id_t BreakpointSite::GetNextID() {
 // should continue.
 
 bool BreakpointSite::ShouldStop(StoppointCallbackContext *context) {
-  IncrementHitCount();
+  m_hit_counter.Increment();
   // ShouldStop can do a lot of work, and might even come come back and hit
   // this breakpoint site again.  So don't hold the m_owners_mutex the whole
   // while.  Instead make a local copy of the collection and call ShouldStop on
@@ -156,51 +156,46 @@ void BreakpointSite::BumpHitCounts() {
   }
 }
 
-void BreakpointSite::SetHardwareIndex(uint32_t index) {
-  std::lock_guard<std::recursive_mutex> guard(m_owners_mutex);
-  for (BreakpointLocationSP loc_sp : m_owners.BreakpointLocations()) {
-    loc_sp->SetHardwareIndex(index);
-  }
-}
-
 bool BreakpointSite::IntersectsRange(lldb::addr_t addr, size_t size,
                                      lldb::addr_t *intersect_addr,
                                      size_t *intersect_size,
                                      size_t *opcode_offset) const {
-  // We only use software traps for software breakpoints
-  if (!IsHardware()) {
-    if (m_byte_size > 0) {
-      const lldb::addr_t bp_end_addr = m_addr + m_byte_size;
-      const lldb::addr_t end_addr = addr + size;
-      // Is the breakpoint end address before the passed in start address?
-      if (bp_end_addr <= addr)
-        return false;
-      // Is the breakpoint start address after passed in end address?
-      if (end_addr <= m_addr)
-        return false;
-      if (intersect_addr || intersect_size || opcode_offset) {
-        if (m_addr < addr) {
-          if (intersect_addr)
-            *intersect_addr = addr;
-          if (intersect_size)
-            *intersect_size =
-                std::min<lldb::addr_t>(bp_end_addr, end_addr) - addr;
-          if (opcode_offset)
-            *opcode_offset = addr - m_addr;
-        } else {
-          if (intersect_addr)
-            *intersect_addr = m_addr;
-          if (intersect_size)
-            *intersect_size =
-                std::min<lldb::addr_t>(bp_end_addr, end_addr) - m_addr;
-          if (opcode_offset)
-            *opcode_offset = 0;
-        }
-      }
-      return true;
+  // The function should be called only for software breakpoints.
+  lldbassert(GetType() == Type::eSoftware);
+
+  if (m_byte_size == 0)
+    return false;
+
+  const lldb::addr_t bp_end_addr = m_addr + m_byte_size;
+  const lldb::addr_t end_addr = addr + size;
+  // Is the breakpoint end address before the passed in start address?
+  if (bp_end_addr <= addr)
+    return false;
+
+  // Is the breakpoint start address after passed in end address?
+  if (end_addr <= m_addr)
+    return false;
+
+  if (intersect_addr || intersect_size || opcode_offset) {
+    if (m_addr < addr) {
+      if (intersect_addr)
+        *intersect_addr = addr;
+      if (intersect_size)
+        *intersect_size =
+            std::min<lldb::addr_t>(bp_end_addr, end_addr) - addr;
+      if (opcode_offset)
+        *opcode_offset = addr - m_addr;
+    } else {
+      if (intersect_addr)
+        *intersect_addr = m_addr;
+      if (intersect_size)
+        *intersect_size =
+            std::min<lldb::addr_t>(bp_end_addr, end_addr) - m_addr;
+      if (opcode_offset)
+        *opcode_offset = 0;
     }
   }
-  return false;
+  return true;
 }
 
 size_t