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clang
3.8.0
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#include "TargetInfo.h"#include "ABIInfo.h"#include "CGCXXABI.h"#include "CGValue.h"#include "CodeGenFunction.h"#include "clang/AST/RecordLayout.h"#include "clang/CodeGen/CGFunctionInfo.h"#include "clang/Frontend/CodeGenOptions.h"#include "llvm/ADT/StringExtras.h"#include "llvm/ADT/Triple.h"#include "llvm/IR/DataLayout.h"#include "llvm/IR/Type.h"#include "llvm/Support/raw_ostream.h"#include <algorithm>Go to the source code of this file.
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| enum | X86AVXABILevel |
| The AVX ABI level for X86 targets. More... | |
Functions | |
| static void | AssignToArrayRange (CodeGen::CGBuilderTy &Builder, llvm::Value *Array, llvm::Value *Value, unsigned FirstIndex, unsigned LastIndex) |
| static bool | isAggregateTypeForABI (QualType T) |
| static CGCXXABI::RecordArgABI | getRecordArgABI (const RecordType *RT, CGCXXABI &CXXABI) |
| static CGCXXABI::RecordArgABI | getRecordArgABI (QualType T, CGCXXABI &CXXABI) |
| static QualType | useFirstFieldIfTransparentUnion (QualType Ty) |
| Pass transparent unions as if they were the type of the first element. More... | |
| static llvm::Value * | emitRoundPointerUpToAlignment (CodeGenFunction &CGF, llvm::Value *Ptr, CharUnits Align) |
| static Address | emitVoidPtrDirectVAArg (CodeGenFunction &CGF, Address VAListAddr, llvm::Type *DirectTy, CharUnits DirectSize, CharUnits DirectAlign, CharUnits SlotSize, bool AllowHigherAlign) |
| Emit va_arg for a platform using the common void* representation, where arguments are simply emitted in an array of slots on the stack. More... | |
| static Address | emitVoidPtrVAArg (CodeGenFunction &CGF, Address VAListAddr, QualType ValueTy, bool IsIndirect, std::pair< CharUnits, CharUnits > ValueInfo, CharUnits SlotSizeAndAlign, bool AllowHigherAlign) |
| Emit va_arg for a platform using the common void* representation, where arguments are simply emitted in an array of slots on the stack. More... | |
| static Address | emitMergePHI (CodeGenFunction &CGF, Address Addr1, llvm::BasicBlock *Block1, Address Addr2, llvm::BasicBlock *Block2, const llvm::Twine &Name="") |
| static bool | isEmptyRecord (ASTContext &Context, QualType T, bool AllowArrays) |
| isEmptyRecord - Return true iff a structure contains only empty fields. More... | |
| static bool | isEmptyField (ASTContext &Context, const FieldDecl *FD, bool AllowArrays) |
| isEmptyField - Return true iff a the field is "empty", that is it is an unnamed bit-field or an (array of) empty record(s). More... | |
| static const Type * | isSingleElementStruct (QualType T, ASTContext &Context) |
| isSingleElementStruct - Determine if a structure is a "single
element struct", i.e. More... | |
| static bool | is32Or64BitBasicType (QualType Ty, ASTContext &Context) |
| static bool | canExpandIndirectArgument (QualType Ty, ASTContext &Context) |
| canExpandIndirectArgument - Test whether an argument type which is to be passed indirectly (on the stack) would have the equivalent layout if it was expanded into separate arguments. More... | |
| static void | rewriteInputConstraintReferences (unsigned FirstIn, unsigned NumNewOuts, std::string &AsmString) |
| Rewrite input constraint references after adding some output constraints. More... | |
| static bool | isSSEVectorType (ASTContext &Context, QualType Ty) |
| static bool | isRecordWithSSEVectorType (ASTContext &Context, QualType Ty) |
| static bool | isArgInAlloca (const ABIArgInfo &Info) |
| static bool | BitsContainNoUserData (QualType Ty, unsigned StartBit, unsigned EndBit, ASTContext &Context) |
| BitsContainNoUserData - Return true if the specified [start,end) bit range is known to either be off the end of the specified type or being in alignment padding. More... | |
| static bool | ContainsFloatAtOffset (llvm::Type *IRType, unsigned IROffset, const llvm::DataLayout &TD) |
| ContainsFloatAtOffset - Return true if the specified LLVM IR type has a float member at the specified offset. More... | |
| static llvm::Type * | GetX86_64ByValArgumentPair (llvm::Type *Lo, llvm::Type *Hi, const llvm::DataLayout &TD) |
| GetX86_64ByValArgumentPair - Given a high and low type that can ideally be used as elements of a two register pair to pass or return, return a first class aggregate to represent them. More... | |
| static Address | EmitX86_64VAArgFromMemory (CodeGenFunction &CGF, Address VAListAddr, QualType Ty) |
| static bool | PPC64_initDwarfEHRegSizeTable (CodeGen::CodeGenFunction &CGF, llvm::Value *Address) |
| static bool | isIntegerLikeType (QualType Ty, ASTContext &Context, llvm::LLVMContext &VMContext) |
| static bool | getTypeString (SmallStringEnc &Enc, const Decl *D, CodeGen::CodeGenModule &CGM, TypeStringCache &TSC) |
| The XCore ABI includes a type information section that communicates symbol type information to the linker. More... | |
| static bool | appendType (SmallStringEnc &Enc, QualType QType, const CodeGen::CodeGenModule &CGM, TypeStringCache &TSC) |
| Handles the type's qualifier before dispatching a call to handle specific type encodings. More... | |
| static bool | extractFieldType (SmallVectorImpl< FieldEncoding > &FE, const RecordDecl *RD, const CodeGen::CodeGenModule &CGM, TypeStringCache &TSC) |
| Helper function for appendRecordType(). More... | |
| static bool | appendRecordType (SmallStringEnc &Enc, const RecordType *RT, const CodeGen::CodeGenModule &CGM, TypeStringCache &TSC, const IdentifierInfo *ID) |
| Appends structure and union types to Enc and adds encoding to cache. More... | |
| static bool | appendEnumType (SmallStringEnc &Enc, const EnumType *ET, TypeStringCache &TSC, const IdentifierInfo *ID) |
| Appends enum types to Enc and adds the encoding to the cache. More... | |
| static void | appendQualifier (SmallStringEnc &Enc, QualType QT) |
| Appends type's qualifier to Enc. More... | |
| static bool | appendBuiltinType (SmallStringEnc &Enc, const BuiltinType *BT) |
| Appends built-in types to Enc. More... | |
| static bool | appendPointerType (SmallStringEnc &Enc, const PointerType *PT, const CodeGen::CodeGenModule &CGM, TypeStringCache &TSC) |
| Appends a pointer encoding to Enc before calling appendType for the pointee. More... | |
| static bool | appendArrayType (SmallStringEnc &Enc, QualType QT, const ArrayType *AT, const CodeGen::CodeGenModule &CGM, TypeStringCache &TSC, StringRef NoSizeEnc) |
| Appends array encoding to Enc before calling appendType for the element. More... | |
| static bool | appendFunctionType (SmallStringEnc &Enc, const FunctionType *FT, const CodeGen::CodeGenModule &CGM, TypeStringCache &TSC) |
| Appends a function encoding to Enc, calling appendType for the return type and the arguments. More... | |
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The AVX ABI level for X86 targets.
Definition at line 1658 of file CodeGen/TargetInfo.cpp.
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Appends array encoding to Enc before calling appendType for the element.
Definition at line 7313 of file CodeGen/TargetInfo.cpp.
References appendQualifier(), appendType(), clang::ArrayType::getElementType(), clang::ArrayType::getSizeModifier(), and clang::ArrayType::Normal.
Referenced by appendType(), and getTypeString().
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Appends built-in types to Enc.
Definition at line 7243 of file CodeGen/TargetInfo.cpp.
References clang::BuiltinType::getKind().
Referenced by appendType().
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Appends enum types to Enc and adds the encoding to the cache.
Definition at line 7185 of file CodeGen/TargetInfo.cpp.
References E, clang::EnumType::getDecl(), clang::EnumDecl::getDefinition(), clang::IdentifierInfo::getName(), and I.
Referenced by appendType().
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Appends a function encoding to Enc, calling appendType for the return type and the arguments.
Definition at line 7335 of file CodeGen/TargetInfo.cpp.
References appendType(), clang::Type::getAs(), clang::FunctionType::getReturnType(), and I.
Referenced by appendType().
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Appends a pointer encoding to Enc before calling appendType for the pointee.
Definition at line 7302 of file CodeGen/TargetInfo.cpp.
References appendType(), and clang::PointerType::getPointeeType().
Referenced by appendType().
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Appends type's qualifier to Enc.
This is done prior to appending the type's encoding.
Definition at line 7229 of file CodeGen/TargetInfo.cpp.
References clang::QualType::isConstQualified(), clang::QualType::isRestrictQualified(), and clang::QualType::isVolatileQualified().
Referenced by appendArrayType(), and appendType().
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Appends structure and union types to Enc and adds encoding to cache.
Recursively calls appendType (via extractFieldType) for each field. Union types have their fields ordered according to the ABI.
Definition at line 7133 of file CodeGen/TargetInfo.cpp.
References E, extractFieldType(), clang::RecordDecl::field_empty(), clang::RecordType::getDecl(), clang::RecordDecl::getDefinition(), clang::IdentifierInfo::getName(), I, and clang::Type::isUnionType().
Referenced by appendType().
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Handles the type's qualifier before dispatching a call to handle specific type encodings.
Definition at line 7369 of file CodeGen/TargetInfo.cpp.
References appendArrayType(), appendBuiltinType(), appendEnumType(), appendFunctionType(), appendPointerType(), appendQualifier(), appendRecordType(), clang::Type::getAs(), clang::Type::getAsArrayTypeUnsafe(), clang::Type::getAsStructureType(), clang::Type::getAsUnionType(), clang::QualType::getBaseTypeIdentifier(), and clang::QualType::getCanonicalType().
Referenced by appendArrayType(), appendFunctionType(), appendPointerType(), extractFieldType(), and getTypeString().
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Definition at line 33 of file CodeGen/TargetInfo.cpp.
References clang::CodeGen::CGBuilderTy::CreateAlignedStore(), I, and clang::CharUnits::One().
Referenced by PPC64_initDwarfEHRegSizeTable().
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BitsContainNoUserData - Return true if the specified [start,end) bit range is known to either be off the end of the specified type or being in alignment padding.
The user type specified is known to be at most 128 bits in size, and have passed through X86_64ABIInfo::classify with a successful classification that put one of the two halves in the INTEGER class.
It is conservatively correct to return false.
Definition at line 2557 of file CodeGen/TargetInfo.cpp.
References Context, clang::RecordDecl::field_begin(), clang::RecordDecl::field_end(), clang::Type::getAs(), clang::ASTContext::getAsConstantArrayType(), clang::ASTContext::getASTRecordLayout(), clang::ASTRecordLayout::getBaseClassOffset(), clang::RecordType::getDecl(), clang::ASTRecordLayout::getFieldOffset(), clang::ASTContext::getTypeSize(), and clang::ASTContext::toBits().
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canExpandIndirectArgument - Test whether an argument type which is to be passed indirectly (on the stack) would have the equivalent layout if it was expanded into separate arguments.
If so, we prefer to do the latter to avoid inhibiting optimizations.
Definition at line 484 of file CodeGen/TargetInfo.cpp.
References Context, clang::RecordDecl::fields(), clang::Type::getAs(), clang::RecordType::getDecl(), clang::ASTContext::getTypeSize(), is32Or64BitBasicType(), and clang::TagDecl::isStruct().
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ContainsFloatAtOffset - Return true if the specified LLVM IR type has a float member at the specified offset.
For example, {int,{float}} has a float at offset 4. It is conservatively correct for this routine to return false.
Definition at line 2638 of file CodeGen/TargetInfo.cpp.
References clang::CodeGen::Type.
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Definition at line 282 of file CodeGen/TargetInfo.cpp.
References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::Address::getAlignment(), clang::CodeGen::Address::getPointer(), clang::CodeGen::Address::getType(), and clang::Name.
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Definition at line 166 of file CodeGen/TargetInfo.cpp.
References clang::CodeGen::CodeGenFunction::Builder, clang::CharUnits::getQuantity(), and clang::CodeGen::CodeGenTypeCache::IntPtrTy.
Referenced by emitVoidPtrDirectVAArg(), and EmitX86_64VAArgFromMemory().
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Emit va_arg for a platform using the common void* representation, where arguments are simply emitted in an array of slots on the stack.
This version implements the core direct-value passing rules.
| SlotSize | - The size and alignment of a stack slot. Each argument will be allocated to a multiple of this number of slots, and all the slots will be aligned to this value. |
| AllowHigherAlign | - The slot alignment is not a cap; an argument type with an alignment greater than the slot size will be emitted on a higher-alignment address, potentially leaving one or more empty slots behind as padding. If this is false, the returned address might be less-aligned than DirectAlign. |
Definition at line 196 of file CodeGen/TargetInfo.cpp.
References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CGBuilderTy::CreateConstInBoundsByteGEP(), clang::CodeGen::CGBuilderTy::CreateElementBitCast(), clang::CodeGen::CGBuilderTy::CreateLoad(), clang::CodeGen::CGBuilderTy::CreateStore(), emitRoundPointerUpToAlignment(), clang::CodeGen::CodeGenModule::getDataLayout(), clang::CodeGen::Address::getElementType(), clang::CodeGen::Address::getPointer(), clang::CodeGen::CodeGenTypeCache::Int8PtrTy, clang::CodeGen::Address::invalid(), and clang::CharUnits::RoundUpToAlignment().
Referenced by emitVoidPtrVAArg().
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Emit va_arg for a platform using the common void* representation, where arguments are simply emitted in an array of slots on the stack.
| IsIndirect | - Values of this type are passed indirectly. |
| ValueInfo | - The size and alignment of this type, generally computed with getContext().getTypeInfoInChars(ValueTy). |
| SlotSizeAndAlign | - The size and alignment of a stack slot. Each argument will be allocated to a multiple of this number of slots, and all the slots will be aligned to this value. |
| AllowHigherAlign | - The slot alignment is not a cap; an argument type with an alignment greater than the slot size will be emitted on a higher-alignment address, potentially leaving one or more empty slots behind as padding. |
Definition at line 249 of file CodeGen/TargetInfo.cpp.
References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::ConvertTypeForMem(), clang::CodeGen::CGBuilderTy::CreateLoad(), emitVoidPtrDirectVAArg(), clang::CodeGen::CodeGenTypeCache::getPointerAlign(), clang::CodeGen::CodeGenTypeCache::getPointerSize(), and clang::CodeGen::Type.
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Definition at line 3109 of file CodeGen/TargetInfo.cpp.
References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::ConvertTypeForMem(), clang::CodeGen::CGBuilderTy::CreateBitCast(), clang::CodeGen::CGBuilderTy::CreateLoad(), clang::CodeGen::CGBuilderTy::CreateStore(), clang::CodeGen::CGBuilderTy::CreateStructGEP(), emitRoundPointerUpToAlignment(), clang::CharUnits::fromQuantity(), clang::CodeGen::CodeGenFunction::getContext(), clang::ASTContext::getTypeAlignInChars(), clang::ASTContext::getTypeSize(), clang::CodeGen::CodeGenTypeCache::Int32Ty, and clang::CodeGen::Type.
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Helper function for appendRecordType().
Builds a SmallVector containing the encoded field types in declaration order.
Definition at line 7105 of file CodeGen/TargetInfo.cpp.
References appendType(), clang::RecordDecl::fields(), and clang::CodeGen::CodeGenModule::getContext().
Referenced by appendRecordType().
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Definition at line 71 of file CodeGen/TargetInfo.cpp.
References clang::RecordType::getDecl(), clang::CodeGen::CGCXXABI::getRecordArgABI(), and clang::CodeGen::CGCXXABI::RAA_Default.
Referenced by getRecordArgABI().
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Definition at line 79 of file CodeGen/TargetInfo.cpp.
References clang::Type::getAs(), getRecordArgABI(), and clang::CodeGen::CGCXXABI::RAA_Default.
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The XCore ABI includes a type information section that communicates symbol type information to the linker.
The linker uses this information to verify safety/correctness of things such as array bound and pointers et al. The ABI only requires C (and XC) language modules to emit TypeStrings. This type information (TypeString) is emitted into meta data for all global symbols: definitions, declarations, functions & variables.
The TypeString carries type, qualifier, name, size & value details. Please see 'Tools Development Guide' section 2.16.2 for format details: https://www.xmos.com/download/public/Tools-Development-Guide%28X9114A%29.pdf The output is tested by test/CodeGen/xcore-stringtype.c.
Definition at line 7403 of file CodeGen/TargetInfo.cpp.
References appendArrayType(), appendType(), clang::CLanguageLinkage, clang::Type::getAsArrayTypeUnsafe(), clang::FunctionDecl::getLanguageLinkage(), and clang::ValueDecl::getType().
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GetX86_64ByValArgumentPair - Given a high and low type that can ideally be used as elements of a two register pair to pass or return, return a first class aggregate to represent them.
For example, if the low part of a by-value argument should be passed as i32* and the high part as float, return {i32*, float}.
Definition at line 2770 of file CodeGen/TargetInfo.cpp.
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Definition at line 459 of file CodeGen/TargetInfo.cpp.
References clang::Type::getAs(), clang::ASTContext::getTypeSize(), clang::Type::hasPointerRepresentation(), clang::Type::isBlockPointerType(), and clang::Type::isEnumeralType().
Referenced by canExpandIndirectArgument().
Definition at line 46 of file CodeGen/TargetInfo.cpp.
References clang::CodeGen::CodeGenFunction::hasScalarEvaluationKind(), and clang::Type::isMemberFunctionPointerType().
Referenced by isSingleElementStruct().
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Definition at line 1486 of file CodeGen/TargetInfo.cpp.
References clang::CodeGen::ABIArgInfo::Direct, clang::CodeGen::ABIArgInfo::Expand, clang::CodeGen::ABIArgInfo::Extend, clang::CodeGen::ABIArgInfo::getIndirectByVal(), clang::CodeGen::ABIArgInfo::getInReg(), clang::CodeGen::ABIArgInfo::getKind(), clang::CodeGen::ABIArgInfo::Ignore, clang::CodeGen::ABIArgInfo::InAlloca, and clang::CodeGen::ABIArgInfo::Indirect.
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isEmptyField - Return true iff a the field is "empty", that is it is an unnamed bit-field or an (array of) empty record(s).
Definition at line 331 of file CodeGen/TargetInfo.cpp.
References clang::Type::getAs(), clang::ASTContext::getAsConstantArrayType(), clang::RecordType::getDecl(), clang::ValueDecl::getType(), isEmptyRecord(), and clang::FieldDecl::isUnnamedBitfield().
Referenced by isEmptyRecord(), and isSingleElementStruct().
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isEmptyRecord - Return true iff a structure contains only empty fields.
Note that a structure with a flexible array member is not considered empty.
Definition at line 364 of file CodeGen/TargetInfo.cpp.
References clang::RecordDecl::fields(), clang::Type::getAs(), clang::RecordType::getDecl(), clang::RecordDecl::hasFlexibleArrayMember(), I, and isEmptyField().
Referenced by isEmptyField(), clang::ABIInfo::isHomogeneousAggregate(), and isSingleElementStruct().
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Definition at line 5082 of file CodeGen/TargetInfo.cpp.
References Context, clang::RecordDecl::field_begin(), clang::RecordDecl::field_end(), clang::Type::getAs(), clang::ASTContext::getASTRecordLayout(), clang::RecordType::getDecl(), clang::ASTRecordLayout::getFieldOffset(), clang::ValueDecl::getType(), clang::ASTContext::getTypeSize(), clang::RecordDecl::hasFlexibleArrayMember(), clang::FieldDecl::isBitField(), clang::Type::isPointerType(), clang::Type::isRealFloatingType(), clang::TagDecl::isUnion(), and clang::Type::isVectorType().
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Definition at line 1152 of file CodeGen/TargetInfo.cpp.
References clang::RecordDecl::fields(), clang::Type::getAs(), clang::RecordType::getDecl(), I, and isSSEVectorType().
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isSingleElementStruct - Determine if a structure is a "single element struct", i.e.
it has exactly one non-empty field or exactly one field which is itself a single element struct. Structures with flexible array members are never considered single element structs.
Definition at line 392 of file CodeGen/TargetInfo.cpp.
References Context, clang::RecordDecl::fields(), clang::Type::getAs(), clang::ASTContext::getAsConstantArrayType(), clang::RecordType::getDecl(), clang::QualType::getTypePtr(), clang::ASTContext::getTypeSize(), clang::RecordDecl::hasFlexibleArrayMember(), I, isAggregateTypeForABI(), isEmptyField(), and isEmptyRecord().
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Definition at line 1148 of file CodeGen/TargetInfo.cpp.
References clang::Type::getAs(), and clang::ASTContext::getTypeSize().
Referenced by isRecordWithSSEVectorType().
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Definition at line 4162 of file CodeGen/TargetInfo.cpp.
References AssignToArrayRange(), clang::CodeGen::CodeGenFunction::Builder, and clang::CodeGen::CodeGenTypeCache::Int8Ty.
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Rewrite input constraint references after adding some output constraints.
In the case where there is one output and one input and we add one output, we need to replace all operand references greater than or equal to 1: mov $0, $1 mov eax, $1 The result will be: mov $0, $2 mov eax, $2
Definition at line 935 of file CodeGen/TargetInfo.cpp.
Pass transparent unions as if they were the type of the first element.
Sema should ensure that all elements of the union have the same "machine type".
Definition at line 89 of file CodeGen/TargetInfo.cpp.
References clang::RecordDecl::field_begin(), clang::RecordDecl::field_empty(), clang::Type::getAsUnionType(), and clang::Decl::hasAttr().
1.8.6