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authorMicah Villmow <villmow@gmail.com>2012-10-04 20:08:28 +0000
committerMicah Villmow <villmow@gmail.com>2012-10-04 20:08:28 +0000
commit55977f6c37d72b318237369cd463b772b089d620 (patch)
treea34a9ba73bc554b8e52b6e9b3f9ab36a80a596e2 /include
parent761dc22e4be6abd0c1a1546b3836219f1625edc4 (diff)
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Accidently checked in the files, only wanted to copy them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165244 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
-rw-r--r--include/llvm/DataLayout.h363
1 files changed, 0 insertions, 363 deletions
diff --git a/include/llvm/DataLayout.h b/include/llvm/DataLayout.h
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--- a/include/llvm/DataLayout.h
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@@ -1,363 +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/ADT/SmallVector.h"
-#include "llvm/Support/DataTypes.h"
-
-namespace llvm {
-
-class Value;
-class Type;
-class IntegerType;
-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 {
- 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 {
- unsigned AlignType : 8; ///< Alignment type (AlignTypeEnum)
- unsigned TypeBitWidth : 24; ///< Type bit width
- unsigned ABIAlign : 16; ///< ABI alignment for this type/bitw
- unsigned PrefAlign : 16; ///< Pref. alignment for this type/bitw
-
- /// Initializer
- static TargetAlignElem get(AlignTypeEnum align_type, unsigned abi_align,
- unsigned pref_align, uint32_t bit_width);
- /// Equality predicate
- 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.
-
- /// 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<TargetAlignElem, 16> Alignments;
-
- /// 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 abi_align,
- unsigned pref_align, uint32_t bit_width);
- unsigned getAlignmentInfo(AlignTypeEnum align_type, uint32_t bit_width,
- bool ABIAlign, Type *Ty) const;
- //! Internal helper method that returns requested alignment for type.
- unsigned getAlignment(Type *Ty, bool abi_or_pref) const;
-
- /// Valid alignment predicate.
- ///
- /// Predicate that tests a TargetAlignElem reference returned by get() against
- /// InvalidAlignmentElem.
- bool validAlignment(const TargetAlignElem &align) const {
- return &align != &InvalidAlignmentElem;
- }
-
- /// Initialise a TargetData object with default values, ensure that the
- /// target data pass is registered.
- void init();
-
-public:
- /// Default ctor.
- ///
- /// @note This has to exist, because this is a pass, but it should never be
- /// used.
- TargetData();
-
- /// Constructs a TargetData from a specification string. See init().
- explicit TargetData(StringRef TargetDescription)
- : ImmutablePass(ID) {
- std::string errMsg = parseSpecifier(TargetDescription, this);
- assert(errMsg == "" && "Invalid target data layout string.");
- (void)errMsg;
- }
-
- /// Parses a target data specification string. Returns an error message
- /// if the string is malformed, or the empty string on success. Optionally
- /// initialises a TargetData object if passed a non-null pointer.
- static std::string parseSpecifier(StringRef TargetDescription, TargetData* td = 0);
-
- /// Initialize target data from properties stored in the module.
- explicit TargetData(const Module *M);
-
- TargetData(const TargetData &TD) :
- ImmutablePass(ID),
- LittleEndian(TD.isLittleEndian()),
- PointerMemSize(TD.PointerMemSize),
- PointerABIAlign(TD.PointerABIAlign),
- PointerPrefAlign(TD.PointerPrefAlign),
- LegalIntWidths(TD.LegalIntWidths),
- Alignments(TD.Alignments),
- LayoutMap(0)
- { }
-
- ~TargetData(); // Not virtual, do not subclass this class
-
- /// 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;
-
- /// 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);
- }
-
- /// 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
- // 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 getPointerABIAlignment() const { return PointerABIAlign; }
- /// Return target's alignment for stack-based pointers
- unsigned getPointerPrefAlignment() const { return PointerPrefAlign; }
- /// Target pointer size
- unsigned getPointerSize() const { return PointerMemSize; }
- /// Target pointer size, in bits
- unsigned getPointerSizeInBits() const { return 8*PointerMemSize; }
-
- /// Size examples:
- ///
- /// Type SizeInBits StoreSizeInBits AllocSizeInBits[*]
- /// ---- ---------- --------------- ---------------
- /// i1 1 8 8
- /// i8 8 8 8
- /// i19 19 24 32
- /// i32 32 32 32
- /// i100 100 104 128
- /// i128 128 128 128
- /// Float 32 32 32
- /// Double 64 64 64
- /// X86_FP80 80 80 96
- ///
- /// [*] 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
- /// specified type. For example, returns 36 for i36 and 80 for x86_fp80.
- 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(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(Type *Ty) const {
- return 8*getTypeStoreSize(Ty);
- }
-
- /// 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 getTypeAllocSize(Type* Ty) const {
- // Round up to the next alignment boundary.
- return RoundUpAlignment(getTypeStoreSize(Ty), getABITypeAlignment(Ty));
- }
-
- /// 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 getTypeAllocSizeInBits(Type* Ty) const {
- return 8*getTypeAllocSize(Ty);
- }
-
- /// getABITypeAlignment - Return the minimum ABI-required alignment for the
- /// specified type.
- unsigned getABITypeAlignment(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 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(Type *Ty) const;
-
- /// getPreferredTypeAlignmentShift - Return the preferred alignment for the
- /// specified type, returned as log2 of the value (a shift amount).
- ///
- unsigned getPreferredTypeAlignmentShift(Type *Ty) const;
-
- /// getIntPtrType - Return an unsigned integer type that is the same size or
- /// greater to the host pointer size.
- ///
- 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.
- ///
- 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(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;
-
- /// RoundUpAlignment - Round the specified value up to the next alignment
- /// boundary specified by Alignment. For example, 7 rounded up to an
- /// alignment boundary of 4 is 8. 8 rounded up to the alignment boundary of 4
- /// is 8 because it is already aligned.
- template <typename UIntTy>
- static UIntTy RoundUpAlignment(UIntTy Val, unsigned Alignment) {
- assert((Alignment & (Alignment-1)) == 0 && "Alignment must be power of 2!");
- return (Val + (Alignment-1)) & ~UIntTy(Alignment-1);
- }
-
- 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 byte 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(StructType *ST, const TargetData &TD);
-};
-
-} // End llvm namespace
-
-#endif