CGBlocks.cpp File Reference

#include "CGBlocks.h"
#include "CGCXXABI.h"
#include "CGDebugInfo.h"
#include "CGObjCRuntime.h"
#include "CGOpenCLRuntime.h"
#include "CodeGenFunction.h"
#include "CodeGenModule.h"
#include "ConstantEmitter.h"
#include "TargetInfo.h"
#include "clang/AST/Attr.h"
#include "clang/AST/DeclObjC.h"
#include "clang/CodeGen/ConstantInitBuilder.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/ScopedPrinter.h"
#include <algorithm>
#include <cstdio>

Go to the source code of this file.

Functions
static llvm::Constant *	buildGlobalBlock (CodeGenModule &CGM, const CGBlockInfo &blockInfo, llvm::Constant *blockFn)
	Build the given block as a global block.
static llvm::Constant *	buildCopyHelper (CodeGenModule &CGM, const CGBlockInfo &blockInfo)
	Build the helper function to copy a block.
static llvm::Constant *	buildDisposeHelper (CodeGenModule &CGM, const CGBlockInfo &blockInfo)
	Build the helper function to dispose of a block.
static std::string	getBlockCaptureStr (const CGBlockInfo::Capture &Cap, CaptureStrKind StrKind, CharUnits BlockAlignment, CodeGenModule &CGM)
static std::string	getBlockDescriptorName (const CGBlockInfo &BlockInfo, CodeGenModule &CGM)
static llvm::Constant *	buildBlockDescriptor (CodeGenModule &CGM, const CGBlockInfo &blockInfo)
	buildBlockDescriptor - Build the block descriptor meta-data for a block.
static std::pair< BlockCaptureEntityKind, BlockFieldFlags >	computeCopyInfoForBlockCapture (const BlockDecl::Capture &CI, QualType T, const LangOptions &LangOpts)
static std::pair< BlockCaptureEntityKind, BlockFieldFlags >	computeDestroyInfoForBlockCapture (const BlockDecl::Capture &CI, QualType T, const LangOptions &LangOpts)
static void	addBlockLayout (CharUnits align, CharUnits size, const BlockDecl::Capture *capture, llvm::Type *type, QualType fieldType, SmallVectorImpl< BlockLayoutChunk > &Layout, CGBlockInfo &Info, CodeGenModule &CGM)
static bool	isSafeForCXXConstantCapture (QualType type)
	Determines if the given type is safe for constant capture in C++.
static llvm::Constant *	tryCaptureAsConstant (CodeGenModule &CGM, CodeGenFunction *CGF, const VarDecl *var)
	It is illegal to modify a const object after initialization.
static CharUnits	getLowBit (CharUnits v)
	Get the low bit of a nonzero character count.
static void	initializeForBlockHeader (CodeGenModule &CGM, CGBlockInfo &info, SmallVectorImpl< llvm::Type * > &elementTypes)
static QualType	getCaptureFieldType (const CodeGenFunction &CGF, const BlockDecl::Capture &CI)
static void	computeBlockInfo (CodeGenModule &CGM, CodeGenFunction *CGF, CGBlockInfo &info)
	Compute the layout of the given block.
static std::string	getCopyDestroyHelperFuncName (const SmallVectorImpl< CGBlockInfo::Capture > &Captures, CharUnits BlockAlignment, CaptureStrKind StrKind, CodeGenModule &CGM)
static void	pushCaptureCleanup (BlockCaptureEntityKind CaptureKind, Address Field, QualType CaptureType, BlockFieldFlags Flags, bool ForCopyHelper, VarDecl *Var, CodeGenFunction &CGF)
static void	setBlockHelperAttributesVisibility (bool CapturesNonExternalType, llvm::Function *Fn, const CGFunctionInfo &FI, CodeGenModule &CGM)
static BlockFieldFlags	getBlockFieldFlagsForObjCObjectPointer (const BlockDecl::Capture &CI, QualType T)
static llvm::Constant *	generateByrefCopyHelper (CodeGenFunction &CGF, const BlockByrefInfo &byrefInfo, BlockByrefHelpers &generator)
static llvm::Constant *	buildByrefCopyHelper (CodeGenModule &CGM, const BlockByrefInfo &byrefInfo, BlockByrefHelpers &generator)
	Build the copy helper for a __block variable.
static llvm::Constant *	generateByrefDisposeHelper (CodeGenFunction &CGF, const BlockByrefInfo &byrefInfo, BlockByrefHelpers &generator)
	Generate code for a __block variable's dispose helper.
static llvm::Constant *	buildByrefDisposeHelper (CodeGenModule &CGM, const BlockByrefInfo &byrefInfo, BlockByrefHelpers &generator)
	Build the dispose helper for a __block variable.
template<class T >
static T *	buildByrefHelpers (CodeGenModule &CGM, const BlockByrefInfo &byrefInfo, T &&generator)
	Lazily build the copy and dispose helpers for a __block variable with the given information.
static void	configureBlocksRuntimeObject (CodeGenModule &CGM, llvm::Constant *C)
	Adjust the declaration of something from the blocks API.

Function Documentation

addBlockLayout()

static void addBlockLayout ( CharUnits  align, CharUnits  size, const BlockDecl::Capture *  capture, llvm::Type *  type, QualType  fieldType, SmallVectorImpl< BlockLayoutChunk > &  Layout, CGBlockInfo &  Info, CodeGenModule &  CGM  )

static

Definition at line 380 of file CGBlocks.cpp.

References computeCopyInfoForBlockCapture(), computeDestroyInfoForBlockCapture(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::CodeGen::CGBlockInfo::NeedsCopyDispose, clang::CodeGen::CGBlockInfo::NoEscape, clang::CodeGen::None, and clang::ast_matchers::type.

Referenced by computeBlockInfo().

buildBlockDescriptor()

static llvm::Constant * buildBlockDescriptor ( CodeGenModule &  CGM, const CGBlockInfo &  blockInfo  )

static

buildBlockDescriptor - Build the block descriptor meta-data for a block.

buildBlockDescriptor is accessed from 5th field of the Block_literal meta-data and contains stationary information about the block literal. Its definition will have 4 (or optionally 6) words.

struct Block_descriptor {
  unsigned long reserved;
  unsigned long size;  // size of Block_literal metadata in bytes.
  void *copy_func_helper_decl;  // optional copy helper.
  void *destroy_func_decl; // optional destructor helper.
  void *block_method_encoding_address; // @encode for block literal signature.
  void *block_layout_info; // encoding of captured block variables.
};

Definition at line 147 of file CGBlocks.cpp.

References clang::CodeGen::ConstantInitBuilderTemplateBase< Traits >::beginStruct(), clang::CodeGen::CGBlockInfo::BlockSize, buildCopyHelper(), buildDisposeHelper(), clang::CodeGen::CGObjCRuntime::BuildGCBlockLayout(), clang::CodeGen::CGObjCRuntime::BuildRCBlockLayout(), clang::C, clang::CodeGen::CodeGenTypes::ConvertType(), clang::CodeGen::CodeGenModule::GetAddrOfConstantCString(), getBlockDescriptorName(), clang::CodeGen::CGBlockInfo::getBlockExpr(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::CodeGen::CodeGenModule::getLLVMContext(), clang::CodeGen::CodeGenModule::getModule(), clang::ASTContext::getObjCEncodingForBlock(), clang::CodeGen::CodeGenModule::getObjCRuntime(), clang::CodeGen::ConstantAddress::getPointer(), clang::CodeGen::CodeGenTypeCache::getPointerAlign(), clang::CharUnits::getQuantity(), clang::CodeGen::CodeGenModule::getTypes(), clang::CodeGen::CGBlockInfo::NeedsCopyDispose, clang::LangOptions::NonGC, clang::opencl_constant, clang::CodeGen::CodeGenModule::supportsCOMDAT(), and clang::CodeGen::CodeGenTypeCache::VoidPtrTy.

Referenced by buildGlobalBlock().

buildByrefCopyHelper()

static llvm::Constant * buildByrefCopyHelper ( CodeGenModule &  CGM, const BlockByrefInfo &  byrefInfo, BlockByrefHelpers &  generator  )

static

Build the copy helper for a __block variable.

Definition at line 2357 of file CGBlocks.cpp.

References generateByrefCopyHelper().

Referenced by buildByrefHelpers().

buildByrefDisposeHelper()

static llvm::Constant * buildByrefDisposeHelper ( CodeGenModule &  CGM, const BlockByrefInfo &  byrefInfo, BlockByrefHelpers &  generator  )

static

Build the dispose helper for a __block variable.

Definition at line 2413 of file CGBlocks.cpp.

References generateByrefDisposeHelper().

Referenced by buildByrefHelpers().

buildByrefHelpers()

template<class T >

static T * buildByrefHelpers ( CodeGenModule &  CGM, const BlockByrefInfo &  byrefInfo, T &&  generator  )

static

Lazily build the copy and dispose helpers for a __block variable with the given information.

Definition at line 2423 of file CGBlocks.cpp.

References buildByrefCopyHelper(), buildByrefDisposeHelper(), clang::CodeGen::CodeGenModule::ByrefHelpersCache, and clang::CodeGen::CodeGenModule::getContext().

buildCopyHelper()

static llvm::Constant * buildCopyHelper ( CodeGenModule &  CGM, const CGBlockInfo &  blockInfo  )

static

Build the helper function to copy a block.

Definition at line 56 of file CGBlocks.cpp.

References clang::CodeGen::CodeGenFunction::GenerateCopyHelperFunction().

Referenced by buildBlockDescriptor().

buildDisposeHelper()

static llvm::Constant * buildDisposeHelper ( CodeGenModule &  CGM, const CGBlockInfo &  blockInfo  )

static

Build the helper function to dispose of a block.

Definition at line 62 of file CGBlocks.cpp.

References clang::CodeGen::CodeGenFunction::GenerateDestroyHelperFunction().

Referenced by buildBlockDescriptor().

buildGlobalBlock()

static llvm::Constant * buildGlobalBlock ( CodeGenModule &  CGM, const CGBlockInfo &  blockInfo, llvm::Constant *  blockFn  )

static

Build the given block as a global block.

Definition at line 1278 of file CGBlocks.cpp.

References clang::CodeGen::CodeGenModule::addUsedGlobal(), b, clang::CodeGen::ConstantInitBuilderTemplateBase< Traits >::beginStruct(), clang::CodeGen::BLOCK_HAS_SIGNATURE, clang::CodeGen::BLOCK_IS_GLOBAL, clang::CodeGen::BLOCK_USE_STRET, clang::CodeGen::CGBlockInfo::BlockAlign, clang::CodeGen::CGBlockInfo::BlockExpression, clang::CodeGen::CGBlockInfo::BlockSize, buildBlockDescriptor(), clang::CodeGen::CGBlockInfo::CanBeGlobal, clang::CodeGen::CodeGenTypes::ConvertType(), clang::CodeGen::CodeGenModule::getAddrOfGlobalBlockIfEmitted(), clang::CharUnits::getAsAlign(), clang::CodeGen::BlockFlags::getBitMask(), clang::CodeGen::CGBlockInfo::getBlockExpr(), clang::CodeGen::CodeGenModule::getContext(), clang::ASTContext::getLangOpts(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::CodeGen::CodeGenModule::getLLVMContext(), clang::CodeGen::CodeGenModule::getModule(), clang::CodeGen::CodeGenModule::getNSConcreteGlobalBlock(), clang::CodeGen::CodeGenModule::getOpenCLRuntime(), clang::CodeGen::CodeGenTypeCache::getPointerAlign(), clang::CharUnits::getQuantity(), clang::CodeGen::CodeGenModule::getTarget(), clang::ASTContext::getTargetAddressSpace(), clang::CodeGen::CodeGenModule::getTargetCodeGenInfo(), clang::CodeGen::TargetCodeGenInfo::getTargetOpenCLBlockHelper(), clang::TargetInfo::getTriple(), clang::Expr::getType(), clang::CodeGen::CodeGenModule::getTypes(), clang::Init, clang::CodeGen::CodeGenTypeCache::Int8PtrPtrTy, clang::CodeGen::CodeGenTypeCache::IntTy, clang::opencl_global, clang::CodeGen::CGOpenCLRuntime::recordBlockInfo(), clang::Result, clang::CodeGen::CodeGenModule::setAddrOfGlobalBlock(), clang::CodeGen::CGBlockInfo::UsesStret, and clang::CodeGen::CodeGenTypeCache::VoidTy.

computeBlockInfo()

static void computeBlockInfo ( CodeGenModule &  CGM, CodeGenFunction *  CGF, CGBlockInfo &  info  )

static

Compute the layout of the given block.

Attempts to lay the block out with minimal space requirements.

Definition at line 545 of file CGBlocks.cpp.

References addBlockLayout(), clang::CharUnits::alignTo(), clang::CodeGen::CGBlockInfo::BlockAlign, clang::CodeGen::CGBlockInfo::BlockHeaderForcedGapOffset, clang::CodeGen::CGBlockInfo::BlockHeaderForcedGapSize, clang::CodeGen::CGBlockInfo::BlockSize, clang::CodeGen::CGBlockInfo::buildCaptureMap(), clang::C, clang::CodeGen::CGBlockInfo::CanBeGlobal, clang::BlockDecl::capture_begin(), clang::BlockDecl::capture_end(), clang::BlockDecl::captures(), clang::BlockDecl::capturesCXXThis(), clang::CodeGen::CGBlockInfo::CapturesNonExternalType, clang::CodeGen::CodeGenTypes::ConvertType(), clang::CodeGen::CodeGenTypes::ConvertTypeForMem(), clang::CodeGen::CodeGenFunction::CurFuncDecl, clang::BlockDecl::doesNotEscape(), clang::Type::getAsCXXRecordDecl(), clang::CodeGen::CGBlockInfo::getBlockDecl(), getCaptureFieldType(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::CodeGen::CodeGenModule::getLLVMContext(), getLowBit(), clang::CodeGen::CodeGenTypeCache::getPointerAlign(), clang::CodeGen::CodeGenTypeCache::getPointerSize(), clang::CharUnits::getQuantity(), clang::CodeGen::CodeGenModule::getTargetCodeGenInfo(), clang::CodeGen::TargetCodeGenInfo::getTargetOpenCLBlockHelper(), clang::ValueDecl::getType(), clang::ASTContext::getTypeInfoInChars(), clang::CodeGen::CodeGenModule::getTypes(), clang::CodeGen::CGBlockInfo::HasCapturedVariableLayout, clang::BlockDecl::hasCaptures(), clang::CodeGen::CGBlockInfo::HasCXXObject, initializeForBlockHeader(), clang::CodeGen::CodeGenTypeCache::Int8Ty, clang::CodeGen::CGBlockInfo::Capture::makeConstant(), clang::CodeGen::CGBlockInfo::NoEscape, clang::LangOptions::NonGC, clang::CodeGen::CGBlockInfo::SortedCaptures, clang::CodeGen::CGBlockInfo::StructureType, tryCaptureAsConstant(), clang::CodeGen::CodeGenTypeCache::VoidPtrTy, and clang::CharUnits::Zero().

Referenced by clang::CodeGen::CodeGenModule::GetAddrOfGlobalBlock().

computeCopyInfoForBlockCapture()

static std::pair< BlockCaptureEntityKind, BlockFieldFlags > computeCopyInfoForBlockCapture ( const BlockDecl::Capture &  CI, QualType  T, const LangOptions &  LangOpts  )

static

Definition at line 1584 of file CGBlocks.cpp.

References clang::CodeGen::ARCStrong, clang::CodeGen::ARCWeak, clang::CodeGen::BLOCK_FIELD_IS_BLOCK, clang::CodeGen::BLOCK_FIELD_IS_BYREF, clang::CodeGen::BLOCK_FIELD_IS_OBJECT, clang::CodeGen::BLOCK_FIELD_IS_WEAK, clang::CodeGen::BlockObject, clang::CodeGen::CXXRecord, clang::BlockDecl::Capture::getCopyExpr(), clang::Qualifiers::getObjCLifetime(), clang::QualType::getQualifiers(), isBlockPointer(), clang::Type::isBlockPointerType(), clang::BlockDecl::Capture::isByRef(), clang::BlockDecl::Capture::isEscapingByref(), clang::QualType::isNonTrivialToPrimitiveCopy(), clang::QualType::isObjCGCWeak(), clang::Type::isObjCInertUnsafeUnretainedType(), clang::Type::isObjCRetainableType(), clang::CodeGen::None, clang::CodeGen::NonTrivialCStruct, clang::QualType::PCK_ARCStrong, clang::QualType::PCK_ARCWeak, clang::QualType::PCK_Struct, clang::QualType::PCK_Trivial, and clang::QualType::PCK_VolatileTrivial.

Referenced by addBlockLayout().

computeDestroyInfoForBlockCapture()

static std::pair< BlockCaptureEntityKind, BlockFieldFlags > computeDestroyInfoForBlockCapture ( const BlockDecl::Capture &  CI, QualType  T, const LangOptions &  LangOpts  )

static

Definition at line 2004 of file CGBlocks.cpp.

References clang::CodeGen::ARCStrong, clang::CodeGen::ARCWeak, clang::CodeGen::BLOCK_FIELD_IS_BYREF, clang::CodeGen::BLOCK_FIELD_IS_WEAK, clang::CodeGen::BlockObject, clang::CodeGen::CXXRecord, clang::QualType::DK_cxx_destructor, clang::QualType::DK_none, clang::QualType::DK_nontrivial_c_struct, clang::QualType::DK_objc_strong_lifetime, clang::QualType::DK_objc_weak_lifetime, getBlockFieldFlagsForObjCObjectPointer(), clang::QualType::getQualifiers(), clang::Qualifiers::hasObjCLifetime(), clang::QualType::isDestructedType(), clang::BlockDecl::Capture::isEscapingByref(), clang::QualType::isObjCGCWeak(), clang::Type::isObjCInertUnsafeUnretainedType(), clang::Type::isObjCRetainableType(), clang::CodeGen::None, and clang::CodeGen::NonTrivialCStruct.

Referenced by addBlockLayout().

configureBlocksRuntimeObject()

static void configureBlocksRuntimeObject ( CodeGenModule &  CGM, llvm::Constant *  C  )

static

Adjust the declaration of something from the blocks API.

Definition at line 2782 of file CGBlocks.cpp.

References clang::C, clang::TranslationUnitDecl::castToDeclContext(), clang::IdentifierTable::get(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::CodeGen::CodeGenModule::getTarget(), clang::ASTContext::getTranslationUnitDecl(), clang::TargetInfo::getTriple(), clang::Decl::hasAttr(), clang::ASTContext::Idents, clang::DeclContext::lookup(), clang::Result, and clang::CodeGen::CodeGenModule::setDSOLocal().

Referenced by clang::CodeGen::CodeGenModule::getBlockObjectAssign(), clang::CodeGen::CodeGenModule::getBlockObjectDispose(), clang::CodeGen::CodeGenModule::getNSConcreteGlobalBlock(), and clang::CodeGen::CodeGenModule::getNSConcreteStackBlock().

generateByrefCopyHelper()

static llvm::Constant * generateByrefCopyHelper ( CodeGenFunction &  CGF, const BlockByrefInfo &  byrefInfo, BlockByrefHelpers &  generator  )

static

Definition at line 2299 of file CGBlocks.cpp.

References clang::CodeGen::CodeGenTypes::arrangeBuiltinFunctionDeclaration(), clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::BlockByrefInfo::ByrefAlignment, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::ApplyDebugLocation::CreateArtificial(), clang::CodeGen::CGBuilderTy::CreateLoad(), clang::CodeGen::CodeGenFunction::emitBlockByrefAddress(), clang::CodeGen::BlockByrefHelpers::emitCopy(), clang::CodeGen::CodeGenFunction::FinishFunction(), clang::CodeGen::CodeGenFunction::GetAddrOfLocalVar(), clang::CodeGen::CodeGenFunction::getContext(), clang::CodeGen::CodeGenTypes::GetFunctionType(), clang::CodeGen::CodeGenModule::getModule(), clang::CodeGen::CodeGenModule::getTypes(), clang::CodeGen::BlockByrefHelpers::needsCopy(), clang::Other, clang::CodeGen::CodeGenModule::SetInternalFunctionAttributes(), clang::CodeGen::CodeGenFunction::StartFunction(), clang::CodeGen::BlockByrefInfo::Type, clang::ASTContext::VoidPtrTy, and clang::ASTContext::VoidTy.

Referenced by buildByrefCopyHelper().

generateByrefDisposeHelper()

static llvm::Constant * generateByrefDisposeHelper ( CodeGenFunction &  CGF, const BlockByrefInfo &  byrefInfo, BlockByrefHelpers &  generator  )

static

Generate code for a __block variable's dispose helper.

Definition at line 2366 of file CGBlocks.cpp.

References clang::CodeGen::CodeGenTypes::arrangeBuiltinFunctionDeclaration(), clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::BlockByrefInfo::ByrefAlignment, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::ApplyDebugLocation::CreateArtificial(), clang::CodeGen::CGBuilderTy::CreateLoad(), clang::CodeGen::CodeGenFunction::emitBlockByrefAddress(), clang::CodeGen::BlockByrefHelpers::emitDispose(), clang::CodeGen::CodeGenFunction::FinishFunction(), clang::CodeGen::CodeGenFunction::GetAddrOfLocalVar(), clang::CodeGen::CodeGenFunction::getContext(), clang::CodeGen::CodeGenTypes::GetFunctionType(), clang::CodeGen::CodeGenModule::getModule(), clang::CodeGen::CodeGenModule::getTypes(), clang::CodeGen::BlockByrefHelpers::needsDispose(), clang::Other, clang::CodeGen::CodeGenModule::SetInternalFunctionAttributes(), clang::CodeGen::CodeGenFunction::StartFunction(), clang::CodeGen::BlockByrefInfo::Type, clang::ASTContext::VoidPtrTy, and clang::ASTContext::VoidTy.

Referenced by buildByrefDisposeHelper().

getBlockCaptureStr()

static std::string getBlockCaptureStr ( const CGBlockInfo::Capture &  Cap, CaptureStrKind  StrKind, CharUnits  BlockAlignment, CodeGenModule &  CGM  )

static

Definition at line 1679 of file CGBlocks.cpp.

References clang::CharUnits::alignmentAtOffset(), clang::CodeGen::ARCStrong, clang::CodeGen::ARCWeak, clang::CodeGen::BLOCK_FIELD_IS_BLOCK, clang::CodeGen::BLOCK_FIELD_IS_BYREF, clang::CodeGen::BLOCK_FIELD_IS_OBJECT, clang::CodeGen::BLOCK_FIELD_IS_WEAK, clang::CodeGen::BlockObject, clang::BlockVarCopyInit::canThrow(), clang::CodeGen::CGBlockInfo::Capture::Cap, clang::CodeGen::CGBlockInfo::Capture::CopyFlags, clang::CodeGen::CGBlockInfo::Capture::CopyKind, clang::CodeGen::CodeGenFunction::cxxDestructorCanThrow(), clang::CodeGen::CXXRecord, clang::CodeGen::CGBlockInfo::Capture::DisposeFlags, clang::CodeGen::CGBlockInfo::Capture::DisposeKind, clang::CodeGen::BlockFieldFlags::getBitMask(), clang::ASTContext::getBlockVarCopyInit(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenModule::getCXXABI(), clang::CodeGen::CGCXXABI::getMangleContext(), clang::CodeGen::CodeGenFunction::getNonTrivialCopyConstructorStr(), clang::CodeGen::CodeGenFunction::getNonTrivialDestructorStr(), clang::CodeGen::CGBlockInfo::Capture::getOffset(), clang::ValueDecl::getType(), clang::BlockDecl::Capture::getVariable(), clang::QualType::isVolatileQualified(), clang::MangleContext::mangleCanonicalTypeName(), clang::CodeGen::None, and clang::CodeGen::NonTrivialCStruct.

Referenced by getBlockDescriptorName(), and getCopyDestroyHelperFuncName().

getBlockDescriptorName()

static std::string getBlockDescriptorName ( const CGBlockInfo &  BlockInfo, CodeGenModule &  CGM  )

static

Replace occurrences of '@' with '\1'. '@' is reserved on ELF platforms as a separator between symbol name and symbol version.

Definition at line 85 of file CGBlocks.cpp.

References clang::CodeGen::CGBlockInfo::BlockAlign, clang::CodeGen::CGBlockInfo::BlockSize, getBlockCaptureStr(), clang::CodeGen::CGBlockInfo::getBlockExpr(), clang::CodeGen::CodeGenModule::getCodeGenOpts(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::ASTContext::getObjCEncodingForBlock(), clang::CodeGen::CodeGenModule::getObjCRuntime(), clang::CharUnits::getQuantity(), clang::CodeGen::CGObjCRuntime::getRCBlockLayoutStr(), clang::CodeGen::CGBlockInfo::NeedsCopyDispose, clang::CodeGen::None, and clang::CodeGen::CGBlockInfo::SortedCaptures.

Referenced by buildBlockDescriptor().

getBlockFieldFlagsForObjCObjectPointer()

static BlockFieldFlags getBlockFieldFlagsForObjCObjectPointer ( const BlockDecl::Capture &  CI, QualType  T  )

static

Definition at line 1995 of file CGBlocks.cpp.

References clang::CodeGen::BLOCK_FIELD_IS_BLOCK, clang::CodeGen::BLOCK_FIELD_IS_OBJECT, and clang::Type::isBlockPointerType().

Referenced by computeDestroyInfoForBlockCapture().

getCaptureFieldType()

static QualType getCaptureFieldType ( const CodeGenFunction &  CGF, const BlockDecl::Capture &  CI  )

static

Definition at line 526 of file CGBlocks.cpp.

References clang::CodeGen::CodeGenFunction::BlockInfo, clang::CodeGen::CGBlockInfo::Capture::fieldType(), clang::CodeGen::CGBlockInfo::getCapture(), clang::CodeGen::CodeGenFunction::getContext(), clang::ASTContext::getLValueReferenceType(), clang::ValueDecl::getType(), clang::BlockDecl::Capture::getVariable(), clang::BlockDecl::Capture::isNested(), clang::VarDecl::isNonEscapingByref(), and clang::CodeGen::CodeGenFunction::LambdaCaptureFields.

Referenced by computeBlockInfo().

getCopyDestroyHelperFuncName()

static std::string getCopyDestroyHelperFuncName ( const SmallVectorImpl< CGBlockInfo::Capture > &  Captures, CharUnits  BlockAlignment, CaptureStrKind  StrKind, CodeGenModule &  CGM  )

static

Definition at line 1775 of file CGBlocks.cpp.

References getBlockCaptureStr(), clang::CodeGen::CodeGenModule::getCodeGenOpts(), clang::CodeGen::CodeGenModule::getLangOpts(), and clang::CharUnits::getQuantity().

getLowBit()

static CharUnits getLowBit ( CharUnits  v )

static

Get the low bit of a nonzero character count.

This is the alignment of the nth byte if the 0th byte is universally aligned.

Definition at line 469 of file CGBlocks.cpp.

References clang::CharUnits::fromQuantity(), and v.

Referenced by computeBlockInfo().

initializeForBlockHeader()

static void initializeForBlockHeader ( CodeGenModule &  CGM, CGBlockInfo &  info, SmallVectorImpl< llvm::Type * > &  elementTypes  )

static

Definition at line 473 of file CGBlocks.cpp.

References clang::CodeGen::CGBlockInfo::BlockAlign, clang::CodeGen::CGBlockInfo::BlockSize, clang::CharUnits::fromQuantity(), clang::CodeGen::CodeGenModule::getBlockDescriptorType(), clang::CodeGen::CodeGenModule::getDataLayout(), clang::CodeGen::CGOpenCLRuntime::getGenericVoidPointerType(), clang::CodeGen::CodeGenTypeCache::getIntAlign(), clang::CodeGen::CodeGenTypeCache::getIntSize(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::CodeGen::CodeGenModule::getOpenCLRuntime(), clang::CodeGen::CodeGenTypeCache::getPointerAlign(), clang::TargetInfo::getPointerAlign(), clang::CodeGen::CodeGenTypeCache::getPointerSize(), clang::TargetInfo::getPointerWidth(), clang::CharUnits::getQuantity(), clang::CodeGen::CodeGenModule::getTarget(), clang::CodeGen::CodeGenModule::getTargetCodeGenInfo(), clang::CodeGen::TargetCodeGenInfo::getTargetOpenCLBlockHelper(), clang::CodeGen::CodeGenTypeCache::IntTy, clang::opencl_generic, and clang::CodeGen::CodeGenTypeCache::VoidPtrTy.

Referenced by computeBlockInfo().

isSafeForCXXConstantCapture()

static bool isSafeForCXXConstantCapture ( QualType  type )

static

Determines if the given type is safe for constant capture in C++.

Definition at line 413 of file CGBlocks.cpp.

References clang::ast_matchers::recordType, and clang::ast_matchers::type.

Referenced by tryCaptureAsConstant().

pushCaptureCleanup()

static void pushCaptureCleanup ( BlockCaptureEntityKind  CaptureKind, Address  Field, QualType  CaptureType, BlockFieldFlags  Flags, bool  ForCopyHelper, VarDecl *  Var, CodeGenFunction &  CGF  )

static

Definition at line 1800 of file CGBlocks.cpp.

References clang::CodeGen::ARCStrong, clang::CodeGen::ARCWeak, clang::CodeGen::BlockObject, CanThrow(), clang::CodeGen::CodeGenFunction::cxxDestructorCanThrow(), clang::CodeGen::CXXRecord, clang::CodeGen::CodeGenFunction::destroyARCStrongImprecise, clang::CodeGen::EHCleanup, clang::CodeGen::CodeGenFunction::enterByrefCleanup(), clang::CodeGen::CodeGenFunction::getCleanupKind(), clang::CodeGen::CodeGenFunction::getDestroyer(), clang::CodeGen::CodeGenFunction::getLangOpts(), clang::QualType::isDestructedType(), clang::CodeGen::CodeGenFunction::needsEHCleanup(), clang::CodeGen::None, clang::CodeGen::NonTrivialCStruct, clang::CodeGen::NormalAndEHCleanup, and clang::CodeGen::CodeGenFunction::pushDestroy().

setBlockHelperAttributesVisibility()

static void setBlockHelperAttributesVisibility ( bool  CapturesNonExternalType, llvm::Function *  Fn, const CGFunctionInfo &  FI, CodeGenModule &  CGM  )

static

Definition at line 1842 of file CGBlocks.cpp.

References clang::CodeGen::CodeGenModule::SetInternalFunctionAttributes(), clang::CodeGen::CodeGenModule::SetLLVMFunctionAttributes(), and clang::CodeGen::CodeGenModule::SetLLVMFunctionAttributesForDefinition().

tryCaptureAsConstant()

static llvm::Constant * tryCaptureAsConstant ( CodeGenModule &  CGM, CodeGenFunction *  CGF, const VarDecl *  var  )

static

It is illegal to modify a const object after initialization.

Therefore, if a const object has a constant initializer, we don't actually need to keep storage for it in the block; we'll just rematerialize it at the start of the block function. This is acceptable because we make no promises about address stability of captured variables.

Definition at line 437 of file CGBlocks.cpp.

References clang::VarDecl::getInit(), clang::CodeGen::CodeGenModule::getLangOpts(), clang::ValueDecl::getType(), isSafeForCXXConstantCapture(), clang::CodeGen::ConstantEmitter::tryEmitAbstractForInitializer(), and clang::ast_matchers::type.

Referenced by computeBlockInfo().