X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FTarget%2FTargetData.h;h=10252865c966cddf02f0ee835e5599bdf988ed29;hb=eeb64ae6e52ac2a7980884fe89c01508014af6a9;hp=8e5c4c34ea9e4b1ee33c7993601c084f73e1182e;hpb=2a6e0a2140f3fc3597fdefa8c4179a230b29b267;p=oota-llvm.git diff --git a/include/llvm/Target/TargetData.h b/include/llvm/Target/TargetData.h index 8e5c4c34ea9..10252865c96 100644 --- a/include/llvm/Target/TargetData.h +++ b/include/llvm/Target/TargetData.h @@ -21,17 +21,18 @@ #define LLVM_TARGET_TARGETDATA_H #include "llvm/Pass.h" -#include "llvm/Support/DataTypes.h" #include "llvm/ADT/SmallVector.h" -#include +#include "llvm/Support/DataTypes.h" namespace llvm { class Value; class Type; +class IntegerType; class StructType; class StructLayout; class GlobalVariable; +class LLVMContext; /// Enum used to categorize the alignment types stored by TargetAlignElem enum AlignTypeEnum { @@ -50,58 +51,55 @@ enum AlignTypeEnum { /// 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 + unsigned ABIAlign; //< ABI alignment for this type/bitw + unsigned 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); + static TargetAlignElem get(AlignTypeEnum align_type, unsigned abi_align, + unsigned 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. - */ + unsigned PointerMemSize; ///< Pointer size in bytes + unsigned PointerABIAlign; ///< Pointer ABI alignment + unsigned PointerPrefAlign; ///< Pointer preferred alignment + + SmallVector LegalIntWidths; ///< Legal Integers. + + /// Alignments- 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 Alignments; - //! Alignment iterator shorthand - typedef SmallVector::iterator align_iterator; - //! Constant alignment iterator shorthand - typedef SmallVector::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. - */ + + /// InvalidAlignmentElem - This member is a signal that a requested alignment + /// type and bit width were not found in the SmallVector. static const TargetAlignElem InvalidAlignmentElem; + // The StructType -> StructLayout map. + mutable void *LayoutMap; + //! Set/initialize target alignments - void setAlignment(AlignTypeEnum align_type, unsigned char abi_align, - unsigned char pref_align, uint32_t bit_width); + 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; //! Internal helper method that returns requested alignment for type. - unsigned char getAlignment(const Type *Ty, bool abi_or_pref) const; + unsigned 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); + bool validAlignment(const TargetAlignElem &align) const { + return &align != &InvalidAlignmentElem; } public: @@ -109,15 +107,11 @@ public: /// /// @note This has to exist, because this is a pass, but it should never be /// used. - TargetData() : ImmutablePass(&ID) { - assert(0 && "ERROR: Bad TargetData ctor used. " - "Tool did not specify a TargetData to use?"); - abort(); - } - + TargetData(); + /// Constructs a TargetData from a specification string. See init(). - explicit TargetData(const std::string &TargetDescription) - : ImmutablePass(&ID) { + explicit TargetData(StringRef TargetDescription) + : ImmutablePass(ID) { init(TargetDescription); } @@ -125,40 +119,72 @@ public: explicit TargetData(const Module *M); TargetData(const TargetData &TD) : - ImmutablePass(&ID), + ImmutablePass(ID), LittleEndian(TD.isLittleEndian()), PointerMemSize(TD.PointerMemSize), PointerABIAlign(TD.PointerABIAlign), PointerPrefAlign(TD.PointerPrefAlign), - Alignments(TD.Alignments) + LegalIntWidths(TD.LegalIntWidths), + Alignments(TD.Alignments), + LayoutMap(0) { } ~TargetData(); // Not virtual, do not subclass this class //! Parse a target data layout string and initialize TargetData alignments. - void init(const std::string &TargetDescription); + void init(StringRef TargetDescription); /// Target endianness... - bool isLittleEndian() const { return LittleEndian; } - bool isBigEndian() const { return !LittleEndian; } + 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; + + /// isLegalInteger - This function returns true if the specified type is + /// known to be a native integer type supported by the CPU. For example, + /// i64 is not native on most 32-bit CPUs and i37 is not native on any known + /// one. This returns false if the integer width is not legal. + /// + /// The width is specified in bits. + /// + bool isLegalInteger(unsigned Width) const { + for (unsigned i = 0, e = (unsigned)LegalIntWidths.size(); i != e; ++i) + if (LegalIntWidths[i] == Width) + return true; + return false; + } + + bool isIllegalInteger(unsigned Width) const { + return !isLegalInteger(Width); + } + + /// 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 + // integer type but i45 does not. + bool fitsInLegalInteger(unsigned Width) const { + for (unsigned i = 0, e = (unsigned)LegalIntWidths.size(); i != e; ++i) + if (Width <= LegalIntWidths[i]) + return true; + return false; + } + /// Target pointer alignment - unsigned char getPointerABIAlignment() const { return PointerABIAlign; } + unsigned getPointerABIAlignment() const { return PointerABIAlign; } /// Return target's alignment for stack-based pointers - unsigned char getPointerPrefAlignment() const { return PointerPrefAlign; } + unsigned getPointerPrefAlignment() const { return PointerPrefAlign; } /// Target pointer size - unsigned char getPointerSize() const { return PointerMemSize; } + unsigned getPointerSize() const { return PointerMemSize; } /// Target pointer size, in bits - unsigned char getPointerSizeInBits() const { return 8*PointerMemSize; } + unsigned getPointerSizeInBits() const { return 8*PointerMemSize; } /// Size examples: /// - /// Type SizeInBits StoreSizeInBits PaddedSizeInBits[*] - /// ---- ---------- --------------- ---------------- + /// Type SizeInBits StoreSizeInBits AllocSizeInBits[*] + /// ---- ---------- --------------- --------------- /// i1 1 8 8 /// i8 8 8 8 /// i19 19 24 32 @@ -169,7 +195,7 @@ public: /// Double 64 64 64 /// X86_FP80 80 80 96 /// - /// [*] The padded size depends on the alignment, and thus on the target. + /// [*] The alloc size depends on the alignment, and thus on the target. /// These values are for x86-32 linux. /// getTypeSizeInBits - Return the number of bits necessary to hold the @@ -190,45 +216,50 @@ public: return 8*getTypeStoreSize(Ty); } - /// getTypePaddedSize - Return the offset in bytes between successive objects + /// getTypeAllocSize - 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 getTypePaddedSize(const Type* Ty) const { + uint64_t getTypeAllocSize(const Type* Ty) const { // Round up to the next alignment boundary. return RoundUpAlignment(getTypeStoreSize(Ty), getABITypeAlignment(Ty)); } - /// getTypePaddedSizeInBits - Return the offset in bits between successive + /// getTypeAllocSizeInBits - 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 getTypePaddedSizeInBits(const Type* Ty) const { - return 8*getTypePaddedSize(Ty); + uint64_t getTypeAllocSizeInBits(const Type* Ty) const { + return 8*getTypeAllocSize(Ty); } /// getABITypeAlignment - Return the minimum ABI-required alignment for the /// specified type. - unsigned char getABITypeAlignment(const Type *Ty) const; + unsigned getABITypeAlignment(const Type *Ty) const; + + /// getABIIntegerTypeAlignment - Return the minimum ABI-required alignment for + /// an integer type of the specified bitwidth. + unsigned getABIIntegerTypeAlignment(unsigned BitWidth) 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; + unsigned 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; + unsigned 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; + unsigned 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; + IntegerType *getIntPtrType(LLVMContext &C) const; /// getIndexedOffset - return the offset from the beginning of the type for /// the specified indices. This is used to implement getelementptr. @@ -292,7 +323,7 @@ public: return StructAlignment; } - /// getElementContainingOffset - Given a valid offset into the structure, + /// getElementContainingOffset - Given a valid byte offset into the structure, /// return the structure index that contains it. /// unsigned getElementContainingOffset(uint64_t Offset) const;