diff options
Diffstat (limited to 'contrib/llvm/include/llvm/Target/TargetData.h')
| -rw-r--r-- | contrib/llvm/include/llvm/Target/TargetData.h | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/contrib/llvm/include/llvm/Target/TargetData.h b/contrib/llvm/include/llvm/Target/TargetData.h index c28081000d71..26fd1870ac39 100644 --- a/contrib/llvm/include/llvm/Target/TargetData.h +++ b/contrib/llvm/include/llvm/Target/TargetData.h @@ -33,6 +33,8 @@ class StructType; class StructLayout; class GlobalVariable; class LLVMContext; +template<typename T> +class ArrayRef; /// Enum used to categorize the alignment types stored by TargetAlignElem enum AlignTypeEnum { @@ -42,6 +44,7 @@ enum AlignTypeEnum { AGGREGATE_ALIGN = 'a', ///< Aggregate alignment STACK_ALIGN = 's' ///< Stack objects alignment }; + /// Target alignment element. /// /// Stores the alignment data associated with a given alignment type (pointer, @@ -62,12 +65,19 @@ struct TargetAlignElem { bool operator==(const TargetAlignElem &rhs) const; }; +/// TargetData - This class holds a parsed version of the target data layout +/// string in a module and provides methods for querying it. The target data +/// layout string is specified *by the target* - a frontend generating LLVM IR +/// is required to generate the right target data for the target being codegen'd +/// to. If some measure of portability is desired, an empty string may be +/// specified in the module. class TargetData : public ImmutablePass { private: bool LittleEndian; ///< Defaults to false unsigned PointerMemSize; ///< Pointer size in bytes unsigned PointerABIAlign; ///< Pointer ABI alignment unsigned PointerPrefAlign; ///< Pointer preferred alignment + unsigned StackNaturalAlign; ///< Stack natural alignment SmallVector<unsigned char, 8> LegalIntWidths; ///< Legal Integers. @@ -90,9 +100,9 @@ private: void setAlignment(AlignTypeEnum align_type, unsigned abi_align, unsigned pref_align, uint32_t bit_width); unsigned getAlignmentInfo(AlignTypeEnum align_type, uint32_t bit_width, - bool ABIAlign, const Type *Ty) const; + bool ABIAlign, Type *Ty) const; //! Internal helper method that returns requested alignment for type. - unsigned getAlignment(const Type *Ty, bool abi_or_pref) const; + unsigned getAlignment(Type *Ty, bool abi_or_pref) const; /// Valid alignment predicate. /// @@ -161,6 +171,11 @@ public: return !isLegalInteger(Width); } + /// Returns true if the given alignment exceeds the natural stack alignment. + bool exceedsNaturalStackAlignment(unsigned Align) const { + return (StackNaturalAlign != 0) && (Align > StackNaturalAlign); + } + /// fitsInLegalInteger - This function returns true if the specified type fits /// in a native integer type supported by the CPU. For example, if the CPU /// only supports i32 as a native integer type, then i27 fits in a legal @@ -200,19 +215,19 @@ public: /// getTypeSizeInBits - Return the number of bits necessary to hold the /// specified type. For example, returns 36 for i36 and 80 for x86_fp80. - uint64_t getTypeSizeInBits(const Type* Ty) const; + uint64_t getTypeSizeInBits(Type* Ty) const; /// getTypeStoreSize - Return the maximum number of bytes that may be /// overwritten by storing the specified type. For example, returns 5 /// for i36 and 10 for x86_fp80. - uint64_t getTypeStoreSize(const Type *Ty) const { + uint64_t getTypeStoreSize(Type *Ty) const { return (getTypeSizeInBits(Ty)+7)/8; } /// getTypeStoreSizeInBits - Return the maximum number of bits that may be /// overwritten by storing the specified type; always a multiple of 8. For /// example, returns 40 for i36 and 80 for x86_fp80. - uint64_t getTypeStoreSizeInBits(const Type *Ty) const { + uint64_t getTypeStoreSizeInBits(Type *Ty) const { return 8*getTypeStoreSize(Ty); } @@ -220,7 +235,7 @@ public: /// of the specified type, including alignment padding. This is the amount /// that alloca reserves for this type. For example, returns 12 or 16 for /// x86_fp80, depending on alignment. - uint64_t getTypeAllocSize(const Type* Ty) const { + uint64_t getTypeAllocSize(Type* Ty) const { // Round up to the next alignment boundary. return RoundUpAlignment(getTypeStoreSize(Ty), getABITypeAlignment(Ty)); } @@ -229,13 +244,13 @@ public: /// objects of the specified type, including alignment padding; always a /// multiple of 8. This is the amount that alloca reserves for this type. /// For example, returns 96 or 128 for x86_fp80, depending on alignment. - uint64_t getTypeAllocSizeInBits(const Type* Ty) const { + uint64_t getTypeAllocSizeInBits(Type* Ty) const { return 8*getTypeAllocSize(Ty); } /// getABITypeAlignment - Return the minimum ABI-required alignment for the /// specified type. - unsigned getABITypeAlignment(const Type *Ty) const; + unsigned getABITypeAlignment(Type *Ty) const; /// getABIIntegerTypeAlignment - Return the minimum ABI-required alignment for /// an integer type of the specified bitwidth. @@ -244,17 +259,17 @@ public: /// getCallFrameTypeAlignment - Return the minimum ABI-required alignment /// for the specified type when it is part of a call frame. - unsigned getCallFrameTypeAlignment(const Type *Ty) const; + unsigned getCallFrameTypeAlignment(Type *Ty) const; /// getPrefTypeAlignment - Return the preferred stack/global alignment for /// the specified type. This is always at least as good as the ABI alignment. - unsigned getPrefTypeAlignment(const Type *Ty) const; + unsigned getPrefTypeAlignment(Type *Ty) const; /// getPreferredTypeAlignmentShift - Return the preferred alignment for the /// specified type, returned as log2 of the value (a shift amount). /// - unsigned getPreferredTypeAlignmentShift(const Type *Ty) const; + unsigned getPreferredTypeAlignmentShift(Type *Ty) const; /// getIntPtrType - Return an unsigned integer type that is the same size or /// greater to the host pointer size. @@ -264,13 +279,12 @@ public: /// getIndexedOffset - return the offset from the beginning of the type for /// the specified indices. This is used to implement getelementptr. /// - uint64_t getIndexedOffset(const Type *Ty, - Value* const* Indices, unsigned NumIndices) const; + uint64_t getIndexedOffset(Type *Ty, ArrayRef<Value *> Indices) const; /// getStructLayout - Return a StructLayout object, indicating the alignment /// of the struct, its size, and the offsets of its fields. Note that this /// information is lazily cached. - const StructLayout *getStructLayout(const StructType *Ty) const; + const StructLayout *getStructLayout(StructType *Ty) const; /// getPreferredAlignment - Return the preferred alignment of the specified /// global. This includes an explicitly requested alignment (if the global @@ -333,7 +347,7 @@ public: private: friend class TargetData; // Only TargetData can create this class - StructLayout(const StructType *ST, const TargetData &TD); + StructLayout(StructType *ST, const TargetData &TD); }; } // End llvm namespace |