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Diffstat (limited to 'release_23/include/llvm/Target/TargetData.h')
| -rw-r--r-- | release_23/include/llvm/Target/TargetData.h | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/release_23/include/llvm/Target/TargetData.h b/release_23/include/llvm/Target/TargetData.h deleted file mode 100644 index 2d9dc076e2ff..000000000000 --- a/release_23/include/llvm/Target/TargetData.h +++ /dev/null @@ -1,289 +0,0 @@ -//===-- llvm/Target/TargetData.h - Data size & alignment info ---*- 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 target properties related to datatype size/offset/alignment -// information. It uses lazy annotations to cache information about how -// structure types are laid out and used. -// -// This structure should be created once, filled in if the defaults are not -// correct and then passed around by const&. None of the members functions -// require modification to the object. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_TARGET_TARGETDATA_H -#define LLVM_TARGET_TARGETDATA_H - -#include "llvm/Pass.h" -#include "llvm/Support/DataTypes.h" -#include "llvm/ADT/SmallVector.h" -#include <string> - -namespace llvm { - -class Value; -class Type; -class StructType; -class StructLayout; -class GlobalVariable; - -/// Enum used to categorize the alignment types stored by TargetAlignElem -enum AlignTypeEnum { - INTEGER_ALIGN = 'i', ///< Integer type alignment - VECTOR_ALIGN = 'v', ///< Vector type alignment - FLOAT_ALIGN = 'f', ///< Floating point type alignment - 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, -/// integer, vector, float) and type bit width. -/// -/// @note The unusual order of elements in the structure attempts to reduce -/// padding and make the structure slightly more cache friendly. -struct TargetAlignElem { - AlignTypeEnum AlignType : 8; //< Alignment type (AlignTypeEnum) - unsigned char ABIAlign; //< ABI alignment for this type/bitw - unsigned char PrefAlign; //< Pref. alignment for this type/bitw - uint32_t TypeBitWidth; //< Type bit width - - /// Initializer - static TargetAlignElem get(AlignTypeEnum align_type, unsigned char abi_align, - unsigned char pref_align, uint32_t bit_width); - /// Equality predicate - bool operator==(const TargetAlignElem &rhs) const; - /// output stream operator - std::ostream &dump(std::ostream &os) const; -}; - -class TargetData : public ImmutablePass { -private: - bool LittleEndian; ///< Defaults to false - unsigned char PointerMemSize; ///< Pointer size in bytes - unsigned char PointerABIAlign; ///< Pointer ABI alignment - unsigned char PointerPrefAlign; ///< Pointer preferred alignment - - //! Where the primitive type alignment data is stored. - /*! - @sa init(). - @note Could support multiple size pointer alignments, e.g., 32-bit pointers - vs. 64-bit pointers by extending TargetAlignment, but for now, we don't. - */ - SmallVector<TargetAlignElem, 16> Alignments; - //! Alignment iterator shorthand - typedef SmallVector<TargetAlignElem, 16>::iterator align_iterator; - //! Constant alignment iterator shorthand - typedef SmallVector<TargetAlignElem, 16>::const_iterator align_const_iterator; - //! Invalid alignment. - /*! - This member is a signal that a requested alignment type and bit width were - not found in the SmallVector. - */ - static const TargetAlignElem InvalidAlignmentElem; - - //! Set/initialize target alignments - void setAlignment(AlignTypeEnum align_type, unsigned char abi_align, - unsigned char pref_align, uint32_t bit_width); - unsigned getAlignmentInfo(AlignTypeEnum align_type, uint32_t bit_width, - bool ABIAlign, const Type *Ty) const; - //! Internal helper method that returns requested alignment for type. - unsigned char getAlignment(const Type *Ty, bool abi_or_pref) const; - - /// Valid alignment predicate. - /// - /// Predicate that tests a TargetAlignElem reference returned by get() against - /// InvalidAlignmentElem. - inline bool validAlignment(const TargetAlignElem &align) const { - return (&align != &InvalidAlignmentElem); - } - -public: - /// Default ctor. - /// - /// @note This has to exist, because this is a pass, but it should never be - /// used. - TargetData() : ImmutablePass(intptr_t(&ID)) { - assert(0 && "ERROR: Bad TargetData ctor used. " - "Tool did not specify a TargetData to use?"); - abort(); - } - - /// Constructs a TargetData from a specification string. See init(). - explicit TargetData(const std::string &TargetDescription) - : ImmutablePass(intptr_t(&ID)) { - init(TargetDescription); - } - - /// Initialize target data from properties stored in the module. - explicit TargetData(const Module *M); - - TargetData(const TargetData &TD) : - ImmutablePass(intptr_t(&ID)), - LittleEndian(TD.isLittleEndian()), - PointerMemSize(TD.PointerMemSize), - PointerABIAlign(TD.PointerABIAlign), - PointerPrefAlign(TD.PointerPrefAlign), - Alignments(TD.Alignments) - { } - - ~TargetData(); // Not virtual, do not subclass this class - - //! Parse a target data layout string and initialize TargetData alignments. - void init(const std::string &TargetDescription); - - /// Target endianness... - bool isLittleEndian() const { return LittleEndian; } - bool isBigEndian() const { return !LittleEndian; } - - /// getStringRepresentation - Return the string representation of the - /// TargetData. This representation is in the same format accepted by the - /// string constructor above. - std::string getStringRepresentation() const; - /// Target pointer alignment - unsigned char getPointerABIAlignment() const { return PointerABIAlign; } - /// Return target's alignment for stack-based pointers - unsigned char getPointerPrefAlignment() const { return PointerPrefAlign; } - /// Target pointer size - unsigned char getPointerSize() const { return PointerMemSize; } - /// Target pointer size, in bits - unsigned char getPointerSizeInBits() const { return 8*PointerMemSize; } - - /// 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; - - /// 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 { - 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 { - return 8*getTypeStoreSize(Ty); - } - - /// getABITypeSize - Return the offset in bytes between successive objects - /// 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 getABITypeSize(const Type* Ty) const { - unsigned char Align = getABITypeAlignment(Ty); - return (getTypeStoreSize(Ty) + Align - 1)/Align*Align; - } - - /// getABITypeSizeInBits - Return the offset in bits between successive - /// 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 getABITypeSizeInBits(const Type* Ty) const { - return 8*getABITypeSize(Ty); - } - - /// getABITypeAlignment - Return the minimum ABI-required alignment for the - /// specified type. - unsigned char getABITypeAlignment(const Type *Ty) const; - - /// getCallFrameTypeAlignment - Return the minimum ABI-required alignment - /// for the specified type when it is part of a call frame. - unsigned char getCallFrameTypeAlignment(const 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 char getPrefTypeAlignment(const Type *Ty) const; - - /// getPreferredTypeAlignmentShift - Return the preferred alignment for the - /// specified type, returned as log2 of the value (a shift amount). - /// - unsigned char getPreferredTypeAlignmentShift(const Type *Ty) const; - - /// getIntPtrType - Return an unsigned integer type that is the same size or - /// greater to the host pointer size. - /// - const Type *getIntPtrType() const; - - /// 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; - - /// 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; - - /// InvalidateStructLayoutInfo - TargetData speculatively caches StructLayout - /// objects. If a TargetData object is alive when types are being refined and - /// removed, this method must be called whenever a StructType is removed to - /// avoid a dangling pointer in this cache. - void InvalidateStructLayoutInfo(const StructType *Ty) const; - - /// getPreferredAlignment - Return the preferred alignment of the specified - /// global. This includes an explicitly requested alignment (if the global - /// has one). - unsigned getPreferredAlignment(const GlobalVariable *GV) const; - - /// getPreferredAlignmentLog - Return the preferred alignment of the - /// specified global, returned in log form. This includes an explicitly - /// requested alignment (if the global has one). - unsigned getPreferredAlignmentLog(const GlobalVariable *GV) const; - - static char ID; // Pass identification, replacement for typeid -}; - -/// StructLayout - used to lazily calculate structure layout information for a -/// target machine, based on the TargetData structure. -/// -class StructLayout { - uint64_t StructSize; - unsigned StructAlignment; - unsigned NumElements; - uint64_t MemberOffsets[1]; // variable sized array! -public: - - uint64_t getSizeInBytes() const { - return StructSize; - } - - uint64_t getSizeInBits() const { - return 8*StructSize; - } - - unsigned getAlignment() const { - return StructAlignment; - } - - /// getElementContainingOffset - Given a valid offset into the structure, - /// return the structure index that contains it. - /// - unsigned getElementContainingOffset(uint64_t Offset) const; - - uint64_t getElementOffset(unsigned Idx) const { - assert(Idx < NumElements && "Invalid element idx!"); - return MemberOffsets[Idx]; - } - - uint64_t getElementOffsetInBits(unsigned Idx) const { - return getElementOffset(Idx)*8; - } - -private: - friend class TargetData; // Only TargetData can create this class - StructLayout(const StructType *ST, const TargetData &TD); -}; - -} // End llvm namespace - -#endif |