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Showing content from https://clang.llvm.org/doxygen/CGDecl_8cpp.html below:

clang: lib/CodeGen/CGDecl.cpp File Reference

#include "CGBlocks.h"
#include "CGCXXABI.h"
#include "CGCleanup.h"
#include "CGDebugInfo.h"
#include "CGOpenCLRuntime.h"
#include "CGOpenMPRuntime.h"
#include "CodeGenFunction.h"
#include "CodeGenModule.h"
#include "ConstantEmitter.h"
#include "EHScopeStack.h"
#include "PatternInit.h"
#include "TargetInfo.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclOpenMP.h"
#include "clang/Basic/CodeGenOptions.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/CodeGen/CGFunctionInfo.h"
#include "clang/Sema/Sema.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/Type.h"
#include <optional>

Go to the source code of this file.

static std::string getStaticDeclName (CodeGenModule &CGM, const VarDecl &D) static void EmitAutoVarWithLifetime (CodeGenFunction &CGF, const VarDecl &var, Address addr, Qualifiers::ObjCLifetime lifetime) EmitAutoVarWithLifetime - Does the setup required for an automatic variable with lifetime.
static bool isAccessedBy (const VarDecl &var, const Stmt *s) static bool isAccessedBy (const ValueDecl *decl, const Expr *e) static bool tryEmitARCCopyWeakInit (CodeGenFunction &CGF, const LValue &destLV, const Expr *init) static void drillIntoBlockVariable (CodeGenFunction &CGF, LValue &lvalue, const VarDecl *var) static bool canEmitInitWithFewStoresAfterBZero (llvm::Constant *Init, unsigned &NumStores) Decide whether we can emit the non-zero parts of the specified initializer with equal or fewer than NumStores scalar stores.
static void emitStoresForInitAfterBZero (CodeGenModule &CGM, llvm::Constant *Init, Address Loc, bool isVolatile, CGBuilderTy &Builder, bool IsAutoInit) For inits that canEmitInitWithFewStoresAfterBZero returned true for, emit the scalar stores that would be required.
static bool shouldUseBZeroPlusStoresToInitialize (llvm::Constant *Init, uint64_t GlobalSize) Decide whether we should use bzero plus some stores to initialize a local variable instead of using a memcpy from a constant global.
static llvm::Value * shouldUseMemSetToInitialize (llvm::Constant *Init, uint64_t GlobalSize, const llvm::DataLayout &DL) Decide whether we should use memset to initialize a local variable instead of using a memcpy from a constant global.
static bool shouldSplitConstantStore (CodeGenModule &CGM, uint64_t GlobalByteSize) Decide whether we want to split a constant structure or array store into a sequence of its fields' stores.
static llvm::Constant * patternOrZeroFor (CodeGenModule &CGM, IsPattern isPattern, llvm::Type *Ty) Generate a constant filled with either a pattern or zeroes.
static llvm::Constant * constWithPadding (CodeGenModule &CGM, IsPattern isPattern, llvm::Constant *constant) Replace all padding bytes in a given constant with either a pattern byte or 0x00.
static llvm::Constant * constStructWithPadding (CodeGenModule &CGM, IsPattern isPattern, llvm::StructType *STy, llvm::Constant *constant) Helper function for constWithPadding() to deal with padding in structures.
static Address createUnnamedGlobalForMemcpyFrom (CodeGenModule &CGM, const VarDecl &D, CGBuilderTy &Builder, llvm::Constant *Constant, CharUnits Align) static void emitStoresForConstant (CodeGenModule &CGM, const VarDecl &D, Address Loc, bool isVolatile, CGBuilderTy &Builder, llvm::Constant *constant, bool IsAutoInit) static void emitStoresForZeroInit (CodeGenModule &CGM, const VarDecl &D, Address Loc, bool isVolatile, CGBuilderTy &Builder) static void emitStoresForPatternInit (CodeGenModule &CGM, const VarDecl &D, Address Loc, bool isVolatile, CGBuilderTy &Builder) static bool containsUndef (llvm::Constant *constant) static llvm::Constant * replaceUndef (CodeGenModule &CGM, IsPattern isPattern, llvm::Constant *constant) static uint64_t maxFakeUseAggregateSize (const ASTContext &C) Return the maximum size of an aggregate for which we generate a fake use intrinsic when -fextend-variable-liveness is in effect.
static bool shouldExtendLifetime (const ASTContext &Context, const Decl *FuncDecl, const VarDecl &D, ImplicitParamDecl *CXXABIThisDecl) static bool isCapturedBy (const VarDecl &Var, const Expr *E) Determines whether the given __block variable is potentially captured by the given expression.
static bool isCapturedBy (const VarDecl &Var, const Stmt *S) Determines whether the given __block variable is potentially captured by the given statement.
static void emitPartialArrayDestroy (CodeGenFunction &CGF, llvm::Value *begin, llvm::Value *end, QualType type, CharUnits elementAlign, CodeGenFunction::Destroyer *destroyer) Perform partial array destruction as if in an EH cleanup.
◆ IsPattern ◆ canEmitInitWithFewStoresAfterBZero() static bool canEmitInitWithFewStoresAfterBZero ( llvm::Constant * Init, unsigned & NumStores ) static ◆ constStructWithPadding() static llvm::Constant * constStructWithPadding ( CodeGenModule & CGM, IsPattern isPattern, llvm::StructType * STy, llvm::Constant * constant ) static ◆ constWithPadding() static llvm::Constant * constWithPadding ( CodeGenModule & CGM, IsPattern isPattern, llvm::Constant * constant ) static ◆ containsUndef() static bool containsUndef ( llvm::Constant * constant ) static ◆ createUnnamedGlobalForMemcpyFrom() ◆ drillIntoBlockVariable() ◆ EmitAutoVarWithLifetime()

EmitAutoVarWithLifetime - Does the setup required for an automatic variable with lifetime.

Definition at line 627 of file CGDecl.cpp.

References clang::CodeGen::CodeGenFunction::destroyARCStrongImprecise, clang::CodeGen::CodeGenFunction::destroyARCStrongPrecise, clang::CodeGen::CodeGenFunction::destroyARCWeak, clang::CodeGen::EHCleanup, clang::CodeGen::CodeGenFunction::getARCCleanupKind(), clang::CodeGen::NormalAndEHCleanup, clang::Qualifiers::OCL_Autoreleasing, clang::Qualifiers::OCL_ExplicitNone, clang::Qualifiers::OCL_None, clang::Qualifiers::OCL_Strong, clang::Qualifiers::OCL_Weak, and clang::CodeGen::CodeGenFunction::pushDestroy().

◆ emitPartialArrayDestroy() ◆ emitStoresForConstant()

Definition at line 1168 of file CGDecl.cpp.

References createUnnamedGlobalForMemcpyFrom(), D, emitStoresForConstant(), emitStoresForInitAfterBZero(), clang::CharUnits::fromQuantity(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenModule::getDataLayout(), clang::ASTContext::getLangOpts(), clang::CodeGen::CodeGenTypeCache::Int8Ty, clang::CodeGen::CodeGenTypeCache::IntPtrTy, Loc, clang::LangOptionsBase::Pattern, shouldSplitConstantStore(), shouldUseBZeroPlusStoresToInitialize(), and shouldUseMemSetToInitialize().

Referenced by emitStoresForConstant(), emitStoresForPatternInit(), and emitStoresForZeroInit().

◆ emitStoresForInitAfterBZero() ◆ emitStoresForPatternInit() ◆ emitStoresForZeroInit() ◆ getStaticDeclName() ◆ isAccessedBy() [1/2] ◆ isAccessedBy() [2/2] ◆ isCapturedBy() [1/2] ◆ isCapturedBy() [2/2]

Determines whether the given __block variable is potentially captured by the given statement.

Definition at line 1730 of file CGDecl.cpp.

References E, and isCapturedBy().

◆ maxFakeUseAggregateSize() static uint64_t maxFakeUseAggregateSize ( const ASTContext & C ) static

Return the maximum size of an aggregate for which we generate a fake use intrinsic when -fextend-variable-liveness is in effect.

Definition at line 1428 of file CGDecl.cpp.

References clang::C.

Referenced by shouldExtendLifetime().

◆ patternOrZeroFor() ◆ replaceUndef() ◆ shouldExtendLifetime() ◆ shouldSplitConstantStore() static bool shouldSplitConstantStore ( CodeGenModule & CGM, uint64_t GlobalByteSize ) static ◆ shouldUseBZeroPlusStoresToInitialize() static bool shouldUseBZeroPlusStoresToInitialize ( llvm::Constant * Init, uint64_t GlobalSize ) static ◆ shouldUseMemSetToInitialize() static llvm::Value * shouldUseMemSetToInitialize ( llvm::Constant * Init, uint64_t GlobalSize, const llvm::DataLayout & DL ) static

Decide whether we should use memset to initialize a local variable instead of using a memcpy from a constant global.

Assumes we've already decided to not user bzero. FIXME We could be more clever, as we are for bzero above, and generate memset followed by stores. It's unclear that's worth the effort.

Definition at line 995 of file CGDecl.cpp.

References clang::Init.

Referenced by emitStoresForConstant().

◆ tryEmitARCCopyWeakInit()

Definition at line 695 of file CGDecl.cpp.

References clang::ast_matchers::castExpr, clang::CodeGen::CodeGenFunction::EmitARCCopyWeak(), clang::CodeGen::CodeGenFunction::EmitARCMoveWeak(), clang::CodeGen::CodeGenFunction::EmitLValue(), clang::CodeGen::LValue::getAddress(), clang::CodeGen::Address::getElementType(), clang::QualType::getObjCLifetime(), clang::Expr::getType(), clang::Expr::IgnoreParens(), clang::Expr::isLValue(), clang::Expr::isXValue(), clang::Qualifiers::OCL_Weak, and clang::CodeGen::Address::withElementType().

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