Coverage Report

Created: 2021-01-23 06:44

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/CodeGen/CodeGenModule.h
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//===--- CodeGenModule.h - Per-Module state for LLVM CodeGen ----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This is the internal per-translation-unit state used for llvm translation.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
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#define LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H
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#include "CGVTables.h"
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#include "CodeGenTypeCache.h"
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#include "CodeGenTypes.h"
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#include "SanitizerMetadata.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/DeclOpenMP.h"
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#include "clang/AST/GlobalDecl.h"
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#include "clang/AST/Mangle.h"
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#include "clang/Basic/ABI.h"
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#include "clang/Basic/LangOptions.h"
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#include "clang/Basic/Module.h"
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#include "clang/Basic/SanitizerBlacklist.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Basic/XRayLists.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/ValueHandle.h"
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#include "llvm/Transforms/Utils/SanitizerStats.h"
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namespace llvm {
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class Module;
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class Constant;
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class ConstantInt;
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class Function;
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class GlobalValue;
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class DataLayout;
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class FunctionType;
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class LLVMContext;
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class OpenMPIRBuilder;
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class IndexedInstrProfReader;
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}
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namespace clang {
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class ASTContext;
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class AtomicType;
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class FunctionDecl;
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class IdentifierInfo;
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class ObjCMethodDecl;
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class ObjCImplementationDecl;
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class ObjCCategoryImplDecl;
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class ObjCProtocolDecl;
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class ObjCEncodeExpr;
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class BlockExpr;
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class CharUnits;
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class Decl;
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class Expr;
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class Stmt;
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class InitListExpr;
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class StringLiteral;
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class NamedDecl;
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class ValueDecl;
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class VarDecl;
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class LangOptions;
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class CodeGenOptions;
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class HeaderSearchOptions;
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class PreprocessorOptions;
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class DiagnosticsEngine;
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class AnnotateAttr;
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class CXXDestructorDecl;
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class Module;
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class CoverageSourceInfo;
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class TargetAttr;
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class InitSegAttr;
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struct ParsedTargetAttr;
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namespace CodeGen {
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class CallArgList;
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class CodeGenFunction;
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class CodeGenTBAA;
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class CGCXXABI;
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class CGDebugInfo;
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class CGObjCRuntime;
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class CGOpenCLRuntime;
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class CGOpenMPRuntime;
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class CGCUDARuntime;
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class BlockFieldFlags;
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class FunctionArgList;
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class CoverageMappingModuleGen;
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class TargetCodeGenInfo;
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enum ForDefinition_t : bool {
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  NotForDefinition = false,
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  ForDefinition = true
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};
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struct OrderGlobalInits {
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  unsigned int priority;
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  unsigned int lex_order;
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  OrderGlobalInits(unsigned int p, unsigned int l)
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921
      : priority(p), lex_order(l) {}
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0
  bool operator==(const OrderGlobalInits &RHS) const {
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0
    return priority == RHS.priority && lex_order == RHS.lex_order;
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0
  }
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619
  bool operator<(const OrderGlobalInits &RHS) const {
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619
    return std::tie(priority, lex_order) <
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           std::tie(RHS.priority, RHS.lex_order);
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  }
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};
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struct ObjCEntrypoints {
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13.4k
  ObjCEntrypoints() { memset(this, 0, sizeof(*this)); }
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  /// void objc_alloc(id);
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  llvm::FunctionCallee objc_alloc;
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  /// void objc_allocWithZone(id);
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  llvm::FunctionCallee objc_allocWithZone;
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  /// void objc_alloc_init(id);
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  llvm::FunctionCallee objc_alloc_init;
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  /// void objc_autoreleasePoolPop(void*);
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  llvm::FunctionCallee objc_autoreleasePoolPop;
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  /// void objc_autoreleasePoolPop(void*);
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  /// Note this method is used when we are using exception handling
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  llvm::FunctionCallee objc_autoreleasePoolPopInvoke;
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  /// void *objc_autoreleasePoolPush(void);
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  llvm::Function *objc_autoreleasePoolPush;
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  /// id objc_autorelease(id);
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  llvm::Function *objc_autorelease;
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  /// id objc_autorelease(id);
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  /// Note this is the runtime method not the intrinsic.
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  llvm::FunctionCallee objc_autoreleaseRuntimeFunction;
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  /// id objc_autoreleaseReturnValue(id);
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  llvm::Function *objc_autoreleaseReturnValue;
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  /// void objc_copyWeak(id *dest, id *src);
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  llvm::Function *objc_copyWeak;
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  /// void objc_destroyWeak(id*);
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  llvm::Function *objc_destroyWeak;
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  /// id objc_initWeak(id*, id);
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  llvm::Function *objc_initWeak;
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  /// id objc_loadWeak(id*);
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  llvm::Function *objc_loadWeak;
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  /// id objc_loadWeakRetained(id*);
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  llvm::Function *objc_loadWeakRetained;
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  /// void objc_moveWeak(id *dest, id *src);
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  llvm::Function *objc_moveWeak;
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  /// id objc_retain(id);
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  llvm::Function *objc_retain;
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  /// id objc_retain(id);
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  /// Note this is the runtime method not the intrinsic.
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  llvm::FunctionCallee objc_retainRuntimeFunction;
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  /// id objc_retainAutorelease(id);
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  llvm::Function *objc_retainAutorelease;
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  /// id objc_retainAutoreleaseReturnValue(id);
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  llvm::Function *objc_retainAutoreleaseReturnValue;
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  /// id objc_retainAutoreleasedReturnValue(id);
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  llvm::Function *objc_retainAutoreleasedReturnValue;
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  /// id objc_retainBlock(id);
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  llvm::Function *objc_retainBlock;
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  /// void objc_release(id);
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  llvm::Function *objc_release;
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  /// void objc_release(id);
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  /// Note this is the runtime method not the intrinsic.
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  llvm::FunctionCallee objc_releaseRuntimeFunction;
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  /// void objc_storeStrong(id*, id);
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  llvm::Function *objc_storeStrong;
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  /// id objc_storeWeak(id*, id);
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  llvm::Function *objc_storeWeak;
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  /// id objc_unsafeClaimAutoreleasedReturnValue(id);
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  llvm::Function *objc_unsafeClaimAutoreleasedReturnValue;
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  /// A void(void) inline asm to use to mark that the return value of
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  /// a call will be immediately retain.
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  llvm::InlineAsm *retainAutoreleasedReturnValueMarker;
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  /// void clang.arc.use(...);
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  llvm::Function *clang_arc_use;
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};
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/// This class records statistics on instrumentation based profiling.
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class InstrProfStats {
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  uint32_t VisitedInMainFile;
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  uint32_t MissingInMainFile;
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  uint32_t Visited;
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  uint32_t Missing;
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  uint32_t Mismatched;
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public:
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  InstrProfStats()
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      : VisitedInMainFile(0), MissingInMainFile(0), Visited(0), Missing(0),
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31.4k
        Mismatched(0) {}
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  /// Record that we've visited a function and whether or not that function was
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  /// in the main source file.
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  void addVisited(bool MainFile) {
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    if (MainFile)
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      ++VisitedInMainFile;
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    ++Visited;
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  }
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  /// Record that a function we've visited has no profile data.
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  void addMissing(bool MainFile) {
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    if (MainFile)
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      ++MissingInMainFile;
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    ++Missing;
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  }
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  /// Record that a function we've visited has mismatched profile data.
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  void addMismatched(bool MainFile) { ++Mismatched; }
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  /// Whether or not the stats we've gathered indicate any potential problems.
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  bool hasDiagnostics() { return Missing || 
Mismatched39
; }
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  /// Report potential problems we've found to \c Diags.
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  void reportDiagnostics(DiagnosticsEngine &Diags, StringRef MainFile);
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};
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/// A pair of helper functions for a __block variable.
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class BlockByrefHelpers : public llvm::FoldingSetNode {
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  // MSVC requires this type to be complete in order to process this
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  // header.
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public:
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  llvm::Constant *CopyHelper;
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  llvm::Constant *DisposeHelper;
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  /// The alignment of the field.  This is important because
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  /// different offsets to the field within the byref struct need to
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  /// have different helper functions.
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  CharUnits Alignment;
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  BlockByrefHelpers(CharUnits alignment)
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      : CopyHelper(nullptr), DisposeHelper(nullptr), Alignment(alignment) {}
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  BlockByrefHelpers(const BlockByrefHelpers &) = default;
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  virtual ~BlockByrefHelpers();
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  void Profile(llvm::FoldingSetNodeID &id) const {
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    id.AddInteger(Alignment.getQuantity());
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    profileImpl(id);
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  }
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  virtual void profileImpl(llvm::FoldingSetNodeID &id) const = 0;
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  virtual bool needsCopy() const { return true; }
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  virtual void emitCopy(CodeGenFunction &CGF, Address dest, Address src) = 0;
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  virtual bool needsDispose() const { return true; }
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  virtual void emitDispose(CodeGenFunction &CGF, Address field) = 0;
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};
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/// This class organizes the cross-function state that is used while generating
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/// LLVM code.
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class CodeGenModule : public CodeGenTypeCache {
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  CodeGenModule(const CodeGenModule &) = delete;
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  void operator=(const CodeGenModule &) = delete;
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public:
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  struct Structor {
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0
    Structor() : Priority(0), Initializer(nullptr), AssociatedData(nullptr) {}
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    Structor(int Priority, llvm::Constant *Initializer,
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             llvm::Constant *AssociatedData)
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        : Priority(Priority), Initializer(Initializer),
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          AssociatedData(AssociatedData) {}
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    int Priority;
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    llvm::Constant *Initializer;
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    llvm::Constant *AssociatedData;
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  };
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  typedef std::vector<Structor> CtorList;
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private:
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  ASTContext &Context;
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  const LangOptions &LangOpts;
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  const HeaderSearchOptions &HeaderSearchOpts; // Only used for debug info.
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  const PreprocessorOptions &PreprocessorOpts; // Only used for debug info.
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  const CodeGenOptions &CodeGenOpts;
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  unsigned NumAutoVarInit = 0;
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  llvm::Module &TheModule;
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  DiagnosticsEngine &Diags;
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  const TargetInfo &Target;
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  std::unique_ptr<CGCXXABI> ABI;
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  llvm::LLVMContext &VMContext;
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  std::unique_ptr<CodeGenTBAA> TBAA;
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  mutable std::unique_ptr<TargetCodeGenInfo> TheTargetCodeGenInfo;
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  // This should not be moved earlier, since its initialization depends on some
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  // of the previous reference members being already initialized and also checks
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  // if TheTargetCodeGenInfo is NULL
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  CodeGenTypes Types;
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  /// Holds information about C++ vtables.
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  CodeGenVTables VTables;
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  std::unique_ptr<CGObjCRuntime> ObjCRuntime;
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  std::unique_ptr<CGOpenCLRuntime> OpenCLRuntime;
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  std::unique_ptr<CGOpenMPRuntime> OpenMPRuntime;
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  std::unique_ptr<CGCUDARuntime> CUDARuntime;
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  std::unique_ptr<CGDebugInfo> DebugInfo;
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  std::unique_ptr<ObjCEntrypoints> ObjCData;
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  llvm::MDNode *NoObjCARCExceptionsMetadata = nullptr;
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  std::unique_ptr<llvm::IndexedInstrProfReader> PGOReader;
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  InstrProfStats PGOStats;
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  std::unique_ptr<llvm::SanitizerStatReport> SanStats;
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  // A set of references that have only been seen via a weakref so far. This is
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  // used to remove the weak of the reference if we ever see a direct reference
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  // or a definition.
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  llvm::SmallPtrSet<llvm::GlobalValue*, 10> WeakRefReferences;
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  /// This contains all the decls which have definitions but/ which are deferred
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  /// for emission and therefore should only be output if they are actually
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  /// used. If a decl is in this, then it is known to have not been referenced
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  /// yet.
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  std::map<StringRef, GlobalDecl> DeferredDecls;
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  /// This is a list of deferred decls which we have seen that *are* actually
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  /// referenced. These get code generated when the module is done.
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  std::vector<GlobalDecl> DeferredDeclsToEmit;
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  void addDeferredDeclToEmit(GlobalDecl GD) {
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    DeferredDeclsToEmit.emplace_back(GD);
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  }
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  /// List of alias we have emitted. Used to make sure that what they point to
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  /// is defined once we get to the end of the of the translation unit.
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  std::vector<GlobalDecl> Aliases;
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  /// List of multiversion functions that have to be emitted.  Used to make sure
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  /// we properly emit the iFunc.
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  std::vector<GlobalDecl> MultiVersionFuncs;
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  typedef llvm::StringMap<llvm::TrackingVH<llvm::Constant> > ReplacementsTy;
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  ReplacementsTy Replacements;
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  /// List of global values to be replaced with something else. Used when we
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  /// want to replace a GlobalValue but can't identify it by its mangled name
366
  /// anymore (because the name is already taken).
367
  llvm::SmallVector<std::pair<llvm::GlobalValue *, llvm::Constant *>, 8>
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    GlobalValReplacements;
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  /// Variables for which we've emitted globals containing their constant
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  /// values along with the corresponding globals, for opportunistic reuse.
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  llvm::DenseMap<const VarDecl*, llvm::GlobalVariable*> InitializerConstants;
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  /// Set of global decls for which we already diagnosed mangled name conflict.
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  /// Required to not issue a warning (on a mangling conflict) multiple times
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  /// for the same decl.
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  llvm::DenseSet<GlobalDecl> DiagnosedConflictingDefinitions;
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  /// A queue of (optional) vtables to consider emitting.
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  std::vector<const CXXRecordDecl*> DeferredVTables;
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  /// A queue of (optional) vtables that may be emitted opportunistically.
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  std::vector<const CXXRecordDecl *> OpportunisticVTables;
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  /// List of global values which are required to be present in the object file;
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  /// bitcast to i8*. This is used for forcing visibility of symbols which may
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  /// otherwise be optimized out.
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  std::vector<llvm::WeakTrackingVH> LLVMUsed;
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  std::vector<llvm::WeakTrackingVH> LLVMCompilerUsed;
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  /// Store the list of global constructors and their respective priorities to
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  /// be emitted when the translation unit is complete.
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  CtorList GlobalCtors;
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  /// Store the list of global destructors and their respective priorities to be
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  /// emitted when the translation unit is complete.
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  CtorList GlobalDtors;
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  /// An ordered map of canonical GlobalDecls to their mangled names.
400
  llvm::MapVector<GlobalDecl, StringRef> MangledDeclNames;
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  llvm::StringMap<GlobalDecl, llvm::BumpPtrAllocator> Manglings;
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  // An ordered map of canonical GlobalDecls paired with the cpu-index for
404
  // cpu-specific name manglings.
405
  llvm::MapVector<std::pair<GlobalDecl, unsigned>, StringRef>
406
      CPUSpecificMangledDeclNames;
407
  llvm::StringMap<std::pair<GlobalDecl, unsigned>, llvm::BumpPtrAllocator>
408
      CPUSpecificManglings;
409
410
  /// Global annotations.
411
  std::vector<llvm::Constant*> Annotations;
412
413
  /// Map used to get unique annotation strings.
414
  llvm::StringMap<llvm::Constant*> AnnotationStrings;
415
416
  /// Used for uniquing of annotation arguments.
417
  llvm::DenseMap<unsigned, llvm::Constant *> AnnotationArgs;
418
419
  llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap;
420
421
  llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap;
422
  llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
423
  llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
424
  llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap;
425
426
  llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap;
427
  llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap;
428
429
  /// Map used to get unique type descriptor constants for sanitizers.
430
  llvm::DenseMap<QualType, llvm::Constant *> TypeDescriptorMap;
431
432
  /// Map used to track internal linkage functions declared within
433
  /// extern "C" regions.
434
  typedef llvm::MapVector<IdentifierInfo *,
435
                          llvm::GlobalValue *> StaticExternCMap;
436
  StaticExternCMap StaticExternCValues;
437
438
  /// thread_local variables defined or used in this TU.
439
  std::vector<const VarDecl *> CXXThreadLocals;
440
441
  /// thread_local variables with initializers that need to run
442
  /// before any thread_local variable in this TU is odr-used.
443
  std::vector<llvm::Function *> CXXThreadLocalInits;
444
  std::vector<const VarDecl *> CXXThreadLocalInitVars;
445
446
  /// Global variables with initializers that need to run before main.
447
  std::vector<llvm::Function *> CXXGlobalInits;
448
449
  /// When a C++ decl with an initializer is deferred, null is
450
  /// appended to CXXGlobalInits, and the index of that null is placed
451
  /// here so that the initializer will be performed in the correct
452
  /// order. Once the decl is emitted, the index is replaced with ~0U to ensure
453
  /// that we don't re-emit the initializer.
454
  llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition;
455
456
  typedef std::pair<OrderGlobalInits, llvm::Function*> GlobalInitData;
457
458
  struct GlobalInitPriorityCmp {
459
    bool operator()(const GlobalInitData &LHS,
460
615
                    const GlobalInitData &RHS) const {
461
615
      return LHS.first.priority < RHS.first.priority;
462
615
    }
463
  };
464
465
  /// Global variables with initializers whose order of initialization is set by
466
  /// init_priority attribute.
467
  SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits;
468
469
  /// Global destructor functions and arguments that need to run on termination.
470
  /// When UseSinitAndSterm is set, it instead contains sterm finalizer
471
  /// functions, which also run on unloading a shared library.
472
  std::vector<
473
      std::tuple<llvm::FunctionType *, llvm::WeakTrackingVH, llvm::Constant *>>
474
      CXXGlobalDtorsOrStermFinalizers;
475
476
  /// The complete set of modules that has been imported.
477
  llvm::SetVector<clang::Module *> ImportedModules;
478
479
  /// The set of modules for which the module initializers
480
  /// have been emitted.
481
  llvm::SmallPtrSet<clang::Module *, 16> EmittedModuleInitializers;
482
483
  /// A vector of metadata strings for linker options.
484
  SmallVector<llvm::MDNode *, 16> LinkerOptionsMetadata;
485
486
  /// A vector of metadata strings for dependent libraries for ELF.
487
  SmallVector<llvm::MDNode *, 16> ELFDependentLibraries;
488
489
  /// @name Cache for Objective-C runtime types
490
  /// @{
491
492
  /// Cached reference to the class for constant strings. This value has type
493
  /// int * but is actually an Obj-C class pointer.
494
  llvm::WeakTrackingVH CFConstantStringClassRef;
495
496
  /// The type used to describe the state of a fast enumeration in
497
  /// Objective-C's for..in loop.
498
  QualType ObjCFastEnumerationStateType;
499
500
  /// @}
501
502
  /// Lazily create the Objective-C runtime
503
  void createObjCRuntime();
504
505
  void createOpenCLRuntime();
506
  void createOpenMPRuntime();
507
  void createCUDARuntime();
508
509
  bool isTriviallyRecursive(const FunctionDecl *F);
510
  bool shouldEmitFunction(GlobalDecl GD);
511
  bool shouldOpportunisticallyEmitVTables();
512
  /// Map used to be sure we don't emit the same CompoundLiteral twice.
513
  llvm::DenseMap<const CompoundLiteralExpr *, llvm::GlobalVariable *>
514
      EmittedCompoundLiterals;
515
516
  /// Map of the global blocks we've emitted, so that we don't have to re-emit
517
  /// them if the constexpr evaluator gets aggressive.
518
  llvm::DenseMap<const BlockExpr *, llvm::Constant *> EmittedGlobalBlocks;
519
520
  /// @name Cache for Blocks Runtime Globals
521
  /// @{
522
523
  llvm::Constant *NSConcreteGlobalBlock = nullptr;
524
  llvm::Constant *NSConcreteStackBlock = nullptr;
525
526
  llvm::FunctionCallee BlockObjectAssign = nullptr;
527
  llvm::FunctionCallee BlockObjectDispose = nullptr;
528
529
  llvm::Type *BlockDescriptorType = nullptr;
530
  llvm::Type *GenericBlockLiteralType = nullptr;
531
532
  struct {
533
    int GlobalUniqueCount;
534
  } Block;
535
536
  GlobalDecl initializedGlobalDecl;
537
538
  /// @}
539
540
  /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>)
541
  llvm::Function *LifetimeStartFn = nullptr;
542
543
  /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>)
544
  llvm::Function *LifetimeEndFn = nullptr;
545
546
  std::unique_ptr<SanitizerMetadata> SanitizerMD;
547
548
  llvm::MapVector<const Decl *, bool> DeferredEmptyCoverageMappingDecls;
549
550
  std::unique_ptr<CoverageMappingModuleGen> CoverageMapping;
551
552
  /// Mapping from canonical types to their metadata identifiers. We need to
553
  /// maintain this mapping because identifiers may be formed from distinct
554
  /// MDNodes.
555
  typedef llvm::DenseMap<QualType, llvm::Metadata *> MetadataTypeMap;
556
  MetadataTypeMap MetadataIdMap;
557
  MetadataTypeMap VirtualMetadataIdMap;
558
  MetadataTypeMap GeneralizedMetadataIdMap;
559
560
public:
561
  CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts,
562
                const PreprocessorOptions &ppopts,
563
                const CodeGenOptions &CodeGenOpts, llvm::Module &M,
564
                DiagnosticsEngine &Diags,
565
                CoverageSourceInfo *CoverageInfo = nullptr);
566
567
  ~CodeGenModule();
568
569
  void clear();
570
571
  /// Finalize LLVM code generation.
572
  void Release();
573
574
  /// Return true if we should emit location information for expressions.
575
  bool getExpressionLocationsEnabled() const;
576
577
  /// Return a reference to the configured Objective-C runtime.
578
26.3k
  CGObjCRuntime &getObjCRuntime() {
579
26.3k
    if (!ObjCRuntime) 
createObjCRuntime()0
;
580
26.3k
    return *ObjCRuntime;
581
26.3k
  }
582
583
  /// Return true iff an Objective-C runtime has been configured.
584
0
  bool hasObjCRuntime() { return !!ObjCRuntime; }
585
586
  /// Return a reference to the configured OpenCL runtime.
587
642
  CGOpenCLRuntime &getOpenCLRuntime() {
588
642
    assert(OpenCLRuntime != nullptr);
589
642
    return *OpenCLRuntime;
590
642
  }
591
592
  /// Return a reference to the configured OpenMP runtime.
593
893k
  CGOpenMPRuntime &getOpenMPRuntime() {
594
893k
    assert(OpenMPRuntime != nullptr);
595
893k
    return *OpenMPRuntime;
596
893k
  }
597
598
  /// Return a reference to the configured CUDA runtime.
599
225
  CGCUDARuntime &getCUDARuntime() {
600
225
    assert(CUDARuntime != nullptr);
601
225
    return *CUDARuntime;
602
225
  }
603
604
6.77k
  ObjCEntrypoints &getObjCEntrypoints() const {
605
6.77k
    assert(ObjCData != nullptr);
606
6.77k
    return *ObjCData;
607
6.77k
  }
608
609
  // Version checking functions, used to implement ObjC's @available:
610
  // i32 @__isOSVersionAtLeast(i32, i32, i32)
611
  llvm::FunctionCallee IsOSVersionAtLeastFn = nullptr;
612
  // i32 @__isPlatformVersionAtLeast(i32, i32, i32, i32)
613
  llvm::FunctionCallee IsPlatformVersionAtLeastFn = nullptr;
614
615
205
  InstrProfStats &getPGOStats() { return PGOStats; }
616
280k
  llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); }
617
618
439
  CoverageMappingModuleGen *getCoverageMapping() const {
619
439
    return CoverageMapping.get();
620
439
  }
621
622
22
  llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
623
22
    return StaticLocalDeclMap[D];
624
22
  }
625
  void setStaticLocalDeclAddress(const VarDecl *D,
626
22.1k
                                 llvm::Constant *C) {
627
22.1k
    StaticLocalDeclMap[D] = C;
628
22.1k
  }
629
630
  llvm::Constant *
631
  getOrCreateStaticVarDecl(const VarDecl &D,
632
                           llvm::GlobalValue::LinkageTypes Linkage);
633
634
7.81k
  llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) {
635
7.81k
    return StaticLocalDeclGuardMap[D];
636
7.81k
  }
637
  void setStaticLocalDeclGuardAddress(const VarDecl *D,
638
7.80k
                                      llvm::GlobalVariable *C) {
639
7.80k
    StaticLocalDeclGuardMap[D] = C;
640
7.80k
  }
641
642
  Address createUnnamedGlobalFrom(const VarDecl &D, llvm::Constant *Constant,
643
                                  CharUnits Align);
644
645
  bool lookupRepresentativeDecl(StringRef MangledName,
646
                                GlobalDecl &Result) const;
647
648
7
  llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) {
649
7
    return AtomicSetterHelperFnMap[Ty];
650
7
  }
651
  void setAtomicSetterHelperFnMap(QualType Ty,
652
5
                            llvm::Constant *Fn) {
653
5
    AtomicSetterHelperFnMap[Ty] = Fn;
654
5
  }
655
656
6
  llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) {
657
6
    return AtomicGetterHelperFnMap[Ty];
658
6
  }
659
  void setAtomicGetterHelperFnMap(QualType Ty,
660
4
                            llvm::Constant *Fn) {
661
4
    AtomicGetterHelperFnMap[Ty] = Fn;
662
4
  }
663
664
2.66k
  llvm::Constant *getTypeDescriptorFromMap(QualType Ty) {
665
2.66k
    return TypeDescriptorMap[Ty];
666
2.66k
  }
667
544
  void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C) {
668
544
    TypeDescriptorMap[Ty] = C;
669
544
  }
670
671
7.32M
  CGDebugInfo *getModuleDebugInfo() { return DebugInfo.get(); }
672
673
317
  llvm::MDNode *getNoObjCARCExceptionsMetadata() {
674
317
    if (!NoObjCARCExceptionsMetadata)
675
22
      NoObjCARCExceptionsMetadata = llvm::MDNode::get(getLLVMContext(), None);
676
317
    return NoObjCARCExceptionsMetadata;
677
317
  }
678
679
63.5M
  ASTContext &getContext() const { return Context; }
680
26.2M
  const LangOptions &getLangOpts() const { return LangOpts; }
681
  const HeaderSearchOptions &getHeaderSearchOpts()
682
3.44k
    const { return HeaderSearchOpts; }
683
  const PreprocessorOptions &getPreprocessorOpts()
684
24.2k
    const { return PreprocessorOpts; }
685
21.6M
  const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
686
4.67M
  llvm::Module &getModule() const { return TheModule; }
687
44.3k
  DiagnosticsEngine &getDiags() const { return Diags; }
688
1.45M
  const llvm::DataLayout &getDataLayout() const {
689
1.45M
    return TheModule.getDataLayout();
690
1.45M
  }
691
5.27M
  const TargetInfo &getTarget() const { return Target; }
692
1.43M
  const llvm::Triple &getTriple() const { return Target.getTriple(); }
693
  bool supportsCOMDAT() const;
694
  void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO);
695
696
4.51M
  CGCXXABI &getCXXABI() const { return *ABI; }
697
9.32M
  llvm::LLVMContext &getLLVMContext() { return VMContext; }
698
699
0
  bool shouldUseTBAA() const { return TBAA != nullptr; }
700
701
  const TargetCodeGenInfo &getTargetCodeGenInfo();
702
703
7.06M
  CodeGenTypes &getTypes() { return Types; }
704
705
13.7k
  CodeGenVTables &getVTables() { return VTables; }
706
707
47.7k
  ItaniumVTableContext &getItaniumVTableContext() {
708
47.7k
    return VTables.getItaniumVTableContext();
709
47.7k
  }
710
711
8.09k
  MicrosoftVTableContext &getMicrosoftVTableContext() {
712
8.09k
    return VTables.getMicrosoftVTableContext();
713
8.09k
  }
714
715
0
  CtorList &getGlobalCtors() { return GlobalCtors; }
716
0
  CtorList &getGlobalDtors() { return GlobalDtors; }
717
718
  /// getTBAATypeInfo - Get metadata used to describe accesses to objects of
719
  /// the given type.
720
  llvm::MDNode *getTBAATypeInfo(QualType QTy);
721
722
  /// getTBAAAccessInfo - Get TBAA information that describes an access to
723
  /// an object of the given type.
724
  TBAAAccessInfo getTBAAAccessInfo(QualType AccessType);
725
726
  /// getTBAAVTablePtrAccessInfo - Get the TBAA information that describes an
727
  /// access to a virtual table pointer.
728
  TBAAAccessInfo getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType);
729
730
  llvm::MDNode *getTBAAStructInfo(QualType QTy);
731
732
  /// getTBAABaseTypeInfo - Get metadata that describes the given base access
733
  /// type. Return null if the type is not suitable for use in TBAA access tags.
734
  llvm::MDNode *getTBAABaseTypeInfo(QualType QTy);
735
736
  /// getTBAAAccessTagInfo - Get TBAA tag for a given memory access.
737
  llvm::MDNode *getTBAAAccessTagInfo(TBAAAccessInfo Info);
738
739
  /// mergeTBAAInfoForCast - Get merged TBAA information for the purposes of
740
  /// type casts.
741
  TBAAAccessInfo mergeTBAAInfoForCast(TBAAAccessInfo SourceInfo,
742
                                      TBAAAccessInfo TargetInfo);
743
744
  /// mergeTBAAInfoForConditionalOperator - Get merged TBAA information for the
745
  /// purposes of conditional operator.
746
  TBAAAccessInfo mergeTBAAInfoForConditionalOperator(TBAAAccessInfo InfoA,
747
                                                     TBAAAccessInfo InfoB);
748
749
  /// mergeTBAAInfoForMemoryTransfer - Get merged TBAA information for the
750
  /// purposes of memory transfer calls.
751
  TBAAAccessInfo mergeTBAAInfoForMemoryTransfer(TBAAAccessInfo DestInfo,
752
                                                TBAAAccessInfo SrcInfo);
753
754
  /// getTBAAInfoForSubobject - Get TBAA information for an access with a given
755
  /// base lvalue.
756
33.3k
  TBAAAccessInfo getTBAAInfoForSubobject(LValue Base, QualType AccessType) {
757
33.3k
    if (Base.getTBAAInfo().isMayAlias())
758
447
      return TBAAAccessInfo::getMayAliasInfo();
759
32.8k
    return getTBAAAccessInfo(AccessType);
760
32.8k
  }
761
762
  bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);
763
764
  bool isPaddedAtomicType(QualType type);
765
  bool isPaddedAtomicType(const AtomicType *type);
766
767
  /// DecorateInstructionWithTBAA - Decorate the instruction with a TBAA tag.
768
  void DecorateInstructionWithTBAA(llvm::Instruction *Inst,
769
                                   TBAAAccessInfo TBAAInfo);
770
771
  /// Adds !invariant.barrier !tag to instruction
772
  void DecorateInstructionWithInvariantGroup(llvm::Instruction *I,
773
                                             const CXXRecordDecl *RD);
774
775
  /// Emit the given number of characters as a value of type size_t.
776
  llvm::ConstantInt *getSize(CharUnits numChars);
777
778
  /// Set the visibility for the given LLVM GlobalValue.
779
  void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const;
780
781
  void setDSOLocal(llvm::GlobalValue *GV) const;
782
783
  void setDLLImportDLLExport(llvm::GlobalValue *GV, GlobalDecl D) const;
784
  void setDLLImportDLLExport(llvm::GlobalValue *GV, const NamedDecl *D) const;
785
  /// Set visibility, dllimport/dllexport and dso_local.
786
  /// This must be called after dllimport/dllexport is set.
787
  void setGVProperties(llvm::GlobalValue *GV, GlobalDecl GD) const;
788
  void setGVProperties(llvm::GlobalValue *GV, const NamedDecl *D) const;
789
790
  void setGVPropertiesAux(llvm::GlobalValue *GV, const NamedDecl *D) const;
791
792
  /// Set the TLS mode for the given LLVM GlobalValue for the thread-local
793
  /// variable declaration D.
794
  void setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const;
795
796
  /// Get LLVM TLS mode from CodeGenOptions.
797
  llvm::GlobalVariable::ThreadLocalMode GetDefaultLLVMTLSModel() const;
798
799
374k
  static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) {
800
374k
    switch (V) {
801
220k
    case DefaultVisibility:   return llvm::GlobalValue::DefaultVisibility;
802
154k
    case HiddenVisibility:    return llvm::GlobalValue::HiddenVisibility;
803
206
    case ProtectedVisibility: return llvm::GlobalValue::ProtectedVisibility;
804
0
    }
805
0
    llvm_unreachable("unknown visibility!");
806
0
  }
807
808
  llvm::Constant *GetAddrOfGlobal(GlobalDecl GD,
809
                                  ForDefinition_t IsForDefinition
810
                                    = NotForDefinition);
811
812
  /// Will return a global variable of the given type. If a variable with a
813
  /// different type already exists then a new  variable with the right type
814
  /// will be created and all uses of the old variable will be replaced with a
815
  /// bitcast to the new variable.
816
  llvm::GlobalVariable *
817
  CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty,
818
                                    llvm::GlobalValue::LinkageTypes Linkage,
819
                                    unsigned Alignment);
820
821
  llvm::Function *CreateGlobalInitOrCleanUpFunction(
822
      llvm::FunctionType *ty, const Twine &name, const CGFunctionInfo &FI,
823
      SourceLocation Loc = SourceLocation(), bool TLS = false);
824
825
  /// Return the AST address space of the underlying global variable for D, as
826
  /// determined by its declaration. Normally this is the same as the address
827
  /// space of D's type, but in CUDA, address spaces are associated with
828
  /// declarations, not types. If D is nullptr, return the default address
829
  /// space for global variable.
830
  ///
831
  /// For languages without explicit address spaces, if D has default address
832
  /// space, target-specific global or constant address space may be returned.
833
  LangAS GetGlobalVarAddressSpace(const VarDecl *D);
834
835
  /// Return the llvm::Constant for the address of the given global variable.
836
  /// If Ty is non-null and if the global doesn't exist, then it will be created
837
  /// with the specified type instead of whatever the normal requested type
838
  /// would be. If IsForDefinition is true, it is guaranteed that an actual
839
  /// global with type Ty will be returned, not conversion of a variable with
840
  /// the same mangled name but some other type.
841
  llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D,
842
                                     llvm::Type *Ty = nullptr,
843
                                     ForDefinition_t IsForDefinition
844
                                       = NotForDefinition);
845
846
  /// Return the AST address space of string literal, which is used to emit
847
  /// the string literal as global variable in LLVM IR.
848
  /// Note: This is not necessarily the address space of the string literal
849
  /// in AST. For address space agnostic language, e.g. C++, string literal
850
  /// in AST is always in default address space.
851
  LangAS getStringLiteralAddressSpace() const;
852
853
  /// Return the address of the given function. If Ty is non-null, then this
854
  /// function will use the specified type if it has to create it.
855
  llvm::Constant *GetAddrOfFunction(GlobalDecl GD, llvm::Type *Ty = nullptr,
856
                                    bool ForVTable = false,
857
                                    bool DontDefer = false,
858
                                    ForDefinition_t IsForDefinition
859
                                      = NotForDefinition);
860
861
  /// Get the address of the RTTI descriptor for the given type.
862
  llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false);
863
864
  /// Get the address of a GUID.
865
  ConstantAddress GetAddrOfMSGuidDecl(const MSGuidDecl *GD);
866
867
  /// Get the address of a template parameter object.
868
  ConstantAddress
869
  GetAddrOfTemplateParamObject(const TemplateParamObjectDecl *TPO);
870
871
  /// Get the address of the thunk for the given global decl.
872
  llvm::Constant *GetAddrOfThunk(StringRef Name, llvm::Type *FnTy,
873
                                 GlobalDecl GD);
874
875
  /// Get a reference to the target of VD.
876
  ConstantAddress GetWeakRefReference(const ValueDecl *VD);
877
878
  /// Returns the assumed alignment of an opaque pointer to the given class.
879
  CharUnits getClassPointerAlignment(const CXXRecordDecl *CD);
880
881
  /// Returns the minimum object size for an object of the given class type
882
  /// (or a class derived from it).
883
  CharUnits getMinimumClassObjectSize(const CXXRecordDecl *CD);
884
885
  /// Returns the minimum object size for an object of the given type.
886
444k
  CharUnits getMinimumObjectSize(QualType Ty) {
887
444k
    if (CXXRecordDecl *RD = Ty->getAsCXXRecordDecl())
888
350k
      return getMinimumClassObjectSize(RD);
889
94.4k
    return getContext().getTypeSizeInChars(Ty);
890
94.4k
  }
891
892
  /// Returns the assumed alignment of a virtual base of a class.
893
  CharUnits getVBaseAlignment(CharUnits DerivedAlign,
894
                              const CXXRecordDecl *Derived,
895
                              const CXXRecordDecl *VBase);
896
897
  /// Given a class pointer with an actual known alignment, and the
898
  /// expected alignment of an object at a dynamic offset w.r.t that
899
  /// pointer, return the alignment to assume at the offset.
900
  CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign,
901
                                      const CXXRecordDecl *Class,
902
                                      CharUnits ExpectedTargetAlign);
903
904
  CharUnits
905
  computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass,
906
                                   CastExpr::path_const_iterator Start,
907
                                   CastExpr::path_const_iterator End);
908
909
  /// Returns the offset from a derived class to  a class. Returns null if the
910
  /// offset is 0.
911
  llvm::Constant *
912
  GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
913
                               CastExpr::path_const_iterator PathBegin,
914
                               CastExpr::path_const_iterator PathEnd);
915
916
  llvm::FoldingSet<BlockByrefHelpers> ByrefHelpersCache;
917
918
  /// Fetches the global unique block count.
919
160
  int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; }
920
921
  /// Fetches the type of a generic block descriptor.
922
  llvm::Type *getBlockDescriptorType();
923
924
  /// The type of a generic block literal.
925
  llvm::Type *getGenericBlockLiteralType();
926
927
  /// Gets the address of a block which requires no captures.
928
  llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, StringRef Name);
929
930
  /// Returns the address of a block which requires no caputres, or null if
931
  /// we've yet to emit the block for BE.
932
1.07k
  llvm::Constant *getAddrOfGlobalBlockIfEmitted(const BlockExpr *BE) {
933
1.07k
    return EmittedGlobalBlocks.lookup(BE);
934
1.07k
  }
935
936
  /// Notes that BE's global block is available via Addr. Asserts that BE
937
  /// isn't already emitted.
938
  void setAddrOfGlobalBlock(const BlockExpr *BE, llvm::Constant *Addr);
939
940
  /// Return a pointer to a constant CFString object for the given string.
941
  ConstantAddress GetAddrOfConstantCFString(const StringLiteral *Literal);
942
943
  /// Return a pointer to a constant NSString object for the given string. Or a
944
  /// user defined String object as defined via
945
  /// -fconstant-string-class=class_name option.
946
  ConstantAddress GetAddrOfConstantString(const StringLiteral *Literal);
947
948
  /// Return a constant array for the given string.
949
  llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E);
950
951
  /// Return a pointer to a constant array for the given string literal.
952
  ConstantAddress
953
  GetAddrOfConstantStringFromLiteral(const StringLiteral *S,
954
                                     StringRef Name = ".str");
955
956
  /// Return a pointer to a constant array for the given ObjCEncodeExpr node.
957
  ConstantAddress
958
  GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *);
959
960
  /// Returns a pointer to a character array containing the literal and a
961
  /// terminating '\0' character. The result has pointer to array type.
962
  ///
963
  /// \param GlobalName If provided, the name to use for the global (if one is
964
  /// created).
965
  ConstantAddress
966
  GetAddrOfConstantCString(const std::string &Str,
967
                           const char *GlobalName = nullptr);
968
969
  /// Returns a pointer to a constant global variable for the given file-scope
970
  /// compound literal expression.
971
  ConstantAddress GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E);
972
973
  /// If it's been emitted already, returns the GlobalVariable corresponding to
974
  /// a compound literal. Otherwise, returns null.
975
  llvm::GlobalVariable *
976
  getAddrOfConstantCompoundLiteralIfEmitted(const CompoundLiteralExpr *E);
977
978
  /// Notes that CLE's GlobalVariable is GV. Asserts that CLE isn't already
979
  /// emitted.
980
  void setAddrOfConstantCompoundLiteral(const CompoundLiteralExpr *CLE,
981
                                        llvm::GlobalVariable *GV);
982
983
  /// Returns a pointer to a global variable representing a temporary
984
  /// with static or thread storage duration.
985
  ConstantAddress GetAddrOfGlobalTemporary(const MaterializeTemporaryExpr *E,
986
                                           const Expr *Inner);
987
988
  /// Retrieve the record type that describes the state of an
989
  /// Objective-C fast enumeration loop (for..in).
990
  QualType getObjCFastEnumerationStateType();
991
992
  // Produce code for this constructor/destructor. This method doesn't try
993
  // to apply any ABI rules about which other constructors/destructors
994
  // are needed or if they are alias to each other.
995
  llvm::Function *codegenCXXStructor(GlobalDecl GD);
996
997
  /// Return the address of the constructor/destructor of the given type.
998
  llvm::Constant *
999
  getAddrOfCXXStructor(GlobalDecl GD, const CGFunctionInfo *FnInfo = nullptr,
1000
                       llvm::FunctionType *FnType = nullptr,
1001
                       bool DontDefer = false,
1002
187k
                       ForDefinition_t IsForDefinition = NotForDefinition) {
1003
187k
    return cast<llvm::Constant>(getAddrAndTypeOfCXXStructor(GD, FnInfo, FnType,
1004
187k
                                                            DontDefer,
1005
187k
                                                            IsForDefinition)
1006
187k
                                    .getCallee());
1007
187k
  }
1008
1009
  llvm::FunctionCallee getAddrAndTypeOfCXXStructor(
1010
      GlobalDecl GD, const CGFunctionInfo *FnInfo = nullptr,
1011
      llvm::FunctionType *FnType = nullptr, bool DontDefer = false,
1012
      ForDefinition_t IsForDefinition = NotForDefinition);
1013
1014
  /// Given a builtin id for a function like "__builtin_fabsf", return a
1015
  /// Function* for "fabsf".
1016
  llvm::Constant *getBuiltinLibFunction(const FunctionDecl *FD,
1017
                                        unsigned BuiltinID);
1018
1019
  llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None);
1020
1021
  /// Emit code for a single top level declaration.
1022
  void EmitTopLevelDecl(Decl *D);
1023
1024
  /// Stored a deferred empty coverage mapping for an unused
1025
  /// and thus uninstrumented top level declaration.
1026
  void AddDeferredUnusedCoverageMapping(Decl *D);
1027
1028
  /// Remove the deferred empty coverage mapping as this
1029
  /// declaration is actually instrumented.
1030
  void ClearUnusedCoverageMapping(const Decl *D);
1031
1032
  /// Emit all the deferred coverage mappings
1033
  /// for the uninstrumented functions.
1034
  void EmitDeferredUnusedCoverageMappings();
1035
1036
  /// Emit an alias for "main" if it has no arguments (needed for wasm).
1037
  void EmitMainVoidAlias();
1038
1039
  /// Tell the consumer that this variable has been instantiated.
1040
  void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
1041
1042
  /// If the declaration has internal linkage but is inside an
1043
  /// extern "C" linkage specification, prepare to emit an alias for it
1044
  /// to the expected name.
1045
  template<typename SomeDecl>
1046
  void MaybeHandleStaticInExternC(const SomeDecl *D, llvm::GlobalValue *GV);
1047
1048
  /// Add a global to a list to be added to the llvm.used metadata.
1049
  void addUsedGlobal(llvm::GlobalValue *GV);
1050
1051
  /// Add a global to a list to be added to the llvm.compiler.used metadata.
1052
  void addCompilerUsedGlobal(llvm::GlobalValue *GV);
1053
1054
  /// Add a destructor and object to add to the C++ global destructor function.
1055
6
  void AddCXXDtorEntry(llvm::FunctionCallee DtorFn, llvm::Constant *Object) {
1056
6
    CXXGlobalDtorsOrStermFinalizers.emplace_back(DtorFn.getFunctionType(),
1057
6
                                                 DtorFn.getCallee(), Object);
1058
6
  }
1059
1060
  /// Add an sterm finalizer to the C++ global cleanup function.
1061
20
  void AddCXXStermFinalizerEntry(llvm::FunctionCallee DtorFn) {
1062
20
    CXXGlobalDtorsOrStermFinalizers.emplace_back(DtorFn.getFunctionType(),
1063
20
                                                 DtorFn.getCallee(), nullptr);
1064
20
  }
1065
1066
  /// Add an sterm finalizer to its own llvm.global_dtors entry.
1067
  void AddCXXStermFinalizerToGlobalDtor(llvm::Function *StermFinalizer,
1068
6
                                        int Priority) {
1069
6
    AddGlobalDtor(StermFinalizer, Priority);
1070
6
  }
1071
1072
  /// Create or return a runtime function declaration with the specified type
1073
  /// and name. If \p AssumeConvergent is true, the call will have the
1074
  /// convergent attribute added.
1075
  llvm::FunctionCallee
1076
  CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name,
1077
                        llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1078
                        bool Local = false, bool AssumeConvergent = false);
1079
1080
  /// Create a new runtime global variable with the specified type and name.
1081
  llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
1082
                                        StringRef Name);
1083
1084
  ///@name Custom Blocks Runtime Interfaces
1085
  ///@{
1086
1087
  llvm::Constant *getNSConcreteGlobalBlock();
1088
  llvm::Constant *getNSConcreteStackBlock();
1089
  llvm::FunctionCallee getBlockObjectAssign();
1090
  llvm::FunctionCallee getBlockObjectDispose();
1091
1092
  ///@}
1093
1094
  llvm::Function *getLLVMLifetimeStartFn();
1095
  llvm::Function *getLLVMLifetimeEndFn();
1096
1097
  // Make sure that this type is translated.
1098
  void UpdateCompletedType(const TagDecl *TD);
1099
1100
  llvm::Constant *getMemberPointerConstant(const UnaryOperator *e);
1101
1102
  /// Emit type info if type of an expression is a variably modified
1103
  /// type. Also emit proper debug info for cast types.
1104
  void EmitExplicitCastExprType(const ExplicitCastExpr *E,
1105
                                CodeGenFunction *CGF = nullptr);
1106
1107
  /// Return the result of value-initializing the given type, i.e. a null
1108
  /// expression of the given type.  This is usually, but not always, an LLVM
1109
  /// null constant.
1110
  llvm::Constant *EmitNullConstant(QualType T);
1111
1112
  /// Return a null constant appropriate for zero-initializing a base class with
1113
  /// the given type. This is usually, but not always, an LLVM null constant.
1114
  llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record);
1115
1116
  /// Emit a general error that something can't be done.
1117
  void Error(SourceLocation loc, StringRef error);
1118
1119
  /// Print out an error that codegen doesn't support the specified stmt yet.
1120
  void ErrorUnsupported(const Stmt *S, const char *Type);
1121
1122
  /// Print out an error that codegen doesn't support the specified decl yet.
1123
  void ErrorUnsupported(const Decl *D, const char *Type);
1124
1125
  /// Set the attributes on the LLVM function for the given decl and function
1126
  /// info. This applies attributes necessary for handling the ABI as well as
1127
  /// user specified attributes like section.
1128
  void SetInternalFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1129
                                     const CGFunctionInfo &FI);
1130
1131
  /// Set the LLVM function attributes (sext, zext, etc).
1132
  void SetLLVMFunctionAttributes(GlobalDecl GD, const CGFunctionInfo &Info,
1133
                                 llvm::Function *F);
1134
1135
  /// Set the LLVM function attributes which only apply to a function
1136
  /// definition.
1137
  void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
1138
1139
  /// Set the LLVM function attributes that represent floating point
1140
  /// environment.
1141
  void setLLVMFunctionFEnvAttributes(const FunctionDecl *D, llvm::Function *F);
1142
1143
  /// Return true iff the given type uses 'sret' when used as a return type.
1144
  bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
1145
1146
  /// Return true iff the given type uses an argument slot when 'sret' is used
1147
  /// as a return type.
1148
  bool ReturnSlotInterferesWithArgs(const CGFunctionInfo &FI);
1149
1150
  /// Return true iff the given type uses 'fpret' when used as a return type.
1151
  bool ReturnTypeUsesFPRet(QualType ResultType);
1152
1153
  /// Return true iff the given type uses 'fp2ret' when used as a return type.
1154
  bool ReturnTypeUsesFP2Ret(QualType ResultType);
1155
1156
  /// Get the LLVM attributes and calling convention to use for a particular
1157
  /// function type.
1158
  ///
1159
  /// \param Name - The function name.
1160
  /// \param Info - The function type information.
1161
  /// \param CalleeInfo - The callee information these attributes are being
1162
  /// constructed for. If valid, the attributes applied to this decl may
1163
  /// contribute to the function attributes and calling convention.
1164
  /// \param Attrs [out] - On return, the attribute list to use.
1165
  /// \param CallingConv [out] - On return, the LLVM calling convention to use.
1166
  void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info,
1167
                              CGCalleeInfo CalleeInfo,
1168
                              llvm::AttributeList &Attrs, unsigned &CallingConv,
1169
                              bool AttrOnCallSite);
1170
1171
  /// Adds attributes to F according to our CodeGenOptions and LangOptions, as
1172
  /// though we had emitted it ourselves.  We remove any attributes on F that
1173
  /// conflict with the attributes we add here.
1174
  ///
1175
  /// This is useful for adding attrs to bitcode modules that you want to link
1176
  /// with but don't control, such as CUDA's libdevice.  When linking with such
1177
  /// a bitcode library, you might want to set e.g. its functions'
1178
  /// "unsafe-fp-math" attribute to match the attr of the functions you're
1179
  /// codegen'ing.  Otherwise, LLVM will interpret the bitcode module's lack of
1180
  /// unsafe-fp-math attrs as tantamount to unsafe-fp-math=false, and then LLVM
1181
  /// will propagate unsafe-fp-math=false up to every transitive caller of a
1182
  /// function in the bitcode library!
1183
  ///
1184
  /// With the exception of fast-math attrs, this will only make the attributes
1185
  /// on the function more conservative.  But it's unsafe to call this on a
1186
  /// function which relies on particular fast-math attributes for correctness.
1187
  /// It's up to you to ensure that this is safe.
1188
  void addDefaultFunctionDefinitionAttributes(llvm::Function &F);
1189
1190
  /// Like the overload taking a `Function &`, but intended specifically
1191
  /// for frontends that want to build on Clang's target-configuration logic.
1192
  void addDefaultFunctionDefinitionAttributes(llvm::AttrBuilder &attrs);
1193
1194
  StringRef getMangledName(GlobalDecl GD);
1195
  StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD);
1196
1197
  void EmitTentativeDefinition(const VarDecl *D);
1198
1199
  void EmitExternalDeclaration(const VarDecl *D);
1200
1201
  void EmitVTable(CXXRecordDecl *Class);
1202
1203
  void RefreshTypeCacheForClass(const CXXRecordDecl *Class);
1204
1205
  /// Appends Opts to the "llvm.linker.options" metadata value.
1206
  void AppendLinkerOptions(StringRef Opts);
1207
1208
  /// Appends a detect mismatch command to the linker options.
1209
  void AddDetectMismatch(StringRef Name, StringRef Value);
1210
1211
  /// Appends a dependent lib to the appropriate metadata value.
1212
  void AddDependentLib(StringRef Lib);
1213
1214
1215
  llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD);
1216
1217
253k
  void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) {
1218
253k
    F->setLinkage(getFunctionLinkage(GD));
1219
253k
  }
1220
1221
  /// Return the appropriate linkage for the vtable, VTT, and type information
1222
  /// of the given class.
1223
  llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD);
1224
1225
  /// Return the store size, in character units, of the given LLVM type.
1226
  CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const;
1227
1228
  /// Returns LLVM linkage for a declarator.
1229
  llvm::GlobalValue::LinkageTypes
1230
  getLLVMLinkageForDeclarator(const DeclaratorDecl *D, GVALinkage Linkage,
1231
                              bool IsConstantVariable);
1232
1233
  /// Returns LLVM linkage for a declarator.
1234
  llvm::GlobalValue::LinkageTypes
1235
  getLLVMLinkageVarDefinition(const VarDecl *VD, bool IsConstant);
1236
1237
  /// Emit all the global annotations.
1238
  void EmitGlobalAnnotations();
1239
1240
  /// Emit an annotation string.
1241
  llvm::Constant *EmitAnnotationString(StringRef Str);
1242
1243
  /// Emit the annotation's translation unit.
1244
  llvm::Constant *EmitAnnotationUnit(SourceLocation Loc);
1245
1246
  /// Emit the annotation line number.
1247
  llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
1248
1249
  /// Emit additional args of the annotation.
1250
  llvm::Constant *EmitAnnotationArgs(const AnnotateAttr *Attr);
1251
1252
  /// Generate the llvm::ConstantStruct which contains the annotation
1253
  /// information for a given GlobalValue. The annotation struct is
1254
  /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
1255
  /// GlobalValue being annotated. The second field is the constant string
1256
  /// created from the AnnotateAttr's annotation. The third field is a constant
1257
  /// string containing the name of the translation unit. The fourth field is
1258
  /// the line number in the file of the annotated value declaration.
1259
  llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
1260
                                   const AnnotateAttr *AA,
1261
                                   SourceLocation L);
1262
1263
  /// Add global annotations that are set on D, for the global GV. Those
1264
  /// annotations are emitted during finalization of the LLVM code.
1265
  void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV);
1266
1267
  bool isInSanitizerBlacklist(SanitizerMask Kind, llvm::Function *Fn,
1268
                              SourceLocation Loc) const;
1269
1270
  bool isInSanitizerBlacklist(llvm::GlobalVariable *GV, SourceLocation Loc,
1271
                              QualType Ty,
1272
                              StringRef Category = StringRef()) const;
1273
1274
  /// Imbue XRay attributes to a function, applying the always/never attribute
1275
  /// lists in the process. Returns true if we did imbue attributes this way,
1276
  /// false otherwise.
1277
  bool imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc,
1278
                      StringRef Category = StringRef()) const;
1279
1280
30.5k
  SanitizerMetadata *getSanitizerMetadata() {
1281
30.5k
    return SanitizerMD.get();
1282
30.5k
  }
1283
1284
2.96k
  void addDeferredVTable(const CXXRecordDecl *RD) {
1285
2.96k
    DeferredVTables.push_back(RD);
1286
2.96k
  }
1287
1288
  /// Emit code for a single global function or var decl. Forward declarations
1289
  /// are emitted lazily.
1290
  void EmitGlobal(GlobalDecl D);
1291
1292
  bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
1293
1294
  llvm::GlobalValue *GetGlobalValue(StringRef Ref);
1295
1296
  /// Set attributes which are common to any form of a global definition (alias,
1297
  /// Objective-C method, function, global variable).
1298
  ///
1299
  /// NOTE: This should only be called for definitions.
1300
  void SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV);
1301
1302
  void addReplacement(StringRef Name, llvm::Constant *C);
1303
1304
  void addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C);
1305
1306
  /// Emit a code for threadprivate directive.
1307
  /// \param D Threadprivate declaration.
1308
  void EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D);
1309
1310
  /// Emit a code for declare reduction construct.
1311
  void EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D,
1312
                               CodeGenFunction *CGF = nullptr);
1313
1314
  /// Emit a code for declare mapper construct.
1315
  void EmitOMPDeclareMapper(const OMPDeclareMapperDecl *D,
1316
                            CodeGenFunction *CGF = nullptr);
1317
1318
  /// Emit a code for requires directive.
1319
  /// \param D Requires declaration
1320
  void EmitOMPRequiresDecl(const OMPRequiresDecl *D);
1321
1322
  /// Returns whether the given record has hidden LTO visibility and therefore
1323
  /// may participate in (single-module) CFI and whole-program vtable
1324
  /// optimization.
1325
  bool HasHiddenLTOVisibility(const CXXRecordDecl *RD);
1326
1327
  /// Returns whether the given record has public std LTO visibility
1328
  /// and therefore may not participate in (single-module) CFI and whole-program
1329
  /// vtable optimization.
1330
  bool HasLTOVisibilityPublicStd(const CXXRecordDecl *RD);
1331
1332
  /// Returns the vcall visibility of the given type. This is the scope in which
1333
  /// a virtual function call could be made which ends up being dispatched to a
1334
  /// member function of this class. This scope can be wider than the visibility
1335
  /// of the class itself when the class has a more-visible dynamic base class.
1336
  /// The client should pass in an empty Visited set, which is used to prevent
1337
  /// redundant recursive processing.
1338
  llvm::GlobalObject::VCallVisibility
1339
  GetVCallVisibilityLevel(const CXXRecordDecl *RD,
1340
                          llvm::DenseSet<const CXXRecordDecl *> &Visited);
1341
1342
  /// Emit type metadata for the given vtable using the given layout.
1343
  void EmitVTableTypeMetadata(const CXXRecordDecl *RD,
1344
                              llvm::GlobalVariable *VTable,
1345
                              const VTableLayout &VTLayout);
1346
1347
  /// Generate a cross-DSO type identifier for MD.
1348
  llvm::ConstantInt *CreateCrossDsoCfiTypeId(llvm::Metadata *MD);
1349
1350
  /// Create a metadata identifier for the given type. This may either be an
1351
  /// MDString (for external identifiers) or a distinct unnamed MDNode (for
1352
  /// internal identifiers).
1353
  llvm::Metadata *CreateMetadataIdentifierForType(QualType T);
1354
1355
  /// Create a metadata identifier that is intended to be used to check virtual
1356
  /// calls via a member function pointer.
1357
  llvm::Metadata *CreateMetadataIdentifierForVirtualMemPtrType(QualType T);
1358
1359
  /// Create a metadata identifier for the generalization of the given type.
1360
  /// This may either be an MDString (for external identifiers) or a distinct
1361
  /// unnamed MDNode (for internal identifiers).
1362
  llvm::Metadata *CreateMetadataIdentifierGeneralized(QualType T);
1363
1364
  /// Create and attach type metadata to the given function.
1365
  void CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
1366
                                          llvm::Function *F);
1367
1368
  /// Returns whether this module needs the "all-vtables" type identifier.
1369
  bool NeedAllVtablesTypeId() const;
1370
1371
  /// Create and attach type metadata for the given vtable.
1372
  void AddVTableTypeMetadata(llvm::GlobalVariable *VTable, CharUnits Offset,
1373
                             const CXXRecordDecl *RD);
1374
1375
  /// Return a vector of most-base classes for RD. This is used to implement
1376
  /// control flow integrity checks for member function pointers.
1377
  ///
1378
  /// A most-base class of a class C is defined as a recursive base class of C,
1379
  /// including C itself, that does not have any bases.
1380
  std::vector<const CXXRecordDecl *>
1381
  getMostBaseClasses(const CXXRecordDecl *RD);
1382
1383
  /// Get the declaration of std::terminate for the platform.
1384
  llvm::FunctionCallee getTerminateFn();
1385
1386
  llvm::SanitizerStatReport &getSanStats();
1387
1388
  llvm::Value *
1389
  createOpenCLIntToSamplerConversion(const Expr *E, CodeGenFunction &CGF);
1390
1391
  /// OpenCL v1.2 s5.6.4.6 allows the compiler to store kernel argument
1392
  /// information in the program executable. The argument information stored
1393
  /// includes the argument name, its type, the address and access qualifiers
1394
  /// used. This helper can be used to generate metadata for source code kernel
1395
  /// function as well as generated implicitly kernels. If a kernel is generated
1396
  /// implicitly null value has to be passed to the last two parameters,
1397
  /// otherwise all parameters must have valid non-null values.
1398
  /// \param FN is a pointer to IR function being generated.
1399
  /// \param FD is a pointer to function declaration if any.
1400
  /// \param CGF is a pointer to CodeGenFunction that generates this function.
1401
  void GenOpenCLArgMetadata(llvm::Function *FN,
1402
                            const FunctionDecl *FD = nullptr,
1403
                            CodeGenFunction *CGF = nullptr);
1404
1405
  /// Get target specific null pointer.
1406
  /// \param T is the LLVM type of the null pointer.
1407
  /// \param QT is the clang QualType of the null pointer.
1408
  llvm::Constant *getNullPointer(llvm::PointerType *T, QualType QT);
1409
1410
  CharUnits getNaturalTypeAlignment(QualType T,
1411
                                    LValueBaseInfo *BaseInfo = nullptr,
1412
                                    TBAAAccessInfo *TBAAInfo = nullptr,
1413
                                    bool forPointeeType = false);
1414
  CharUnits getNaturalPointeeTypeAlignment(QualType T,
1415
                                           LValueBaseInfo *BaseInfo = nullptr,
1416
                                           TBAAAccessInfo *TBAAInfo = nullptr);
1417
  bool stopAutoInit();
1418
1419
private:
1420
  llvm::Constant *GetOrCreateLLVMFunction(
1421
      StringRef MangledName, llvm::Type *Ty, GlobalDecl D, bool ForVTable,
1422
      bool DontDefer = false, bool IsThunk = false,
1423
      llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1424
      ForDefinition_t IsForDefinition = NotForDefinition);
1425
1426
  llvm::Constant *GetOrCreateMultiVersionResolver(GlobalDecl GD,
1427
                                                  llvm::Type *DeclTy,
1428
                                                  const FunctionDecl *FD);
1429
  void UpdateMultiVersionNames(GlobalDecl GD, const FunctionDecl *FD);
1430
1431
  llvm::Constant *GetOrCreateLLVMGlobal(StringRef MangledName,
1432
                                        llvm::PointerType *PTy,
1433
                                        const VarDecl *D,
1434
                                        ForDefinition_t IsForDefinition
1435
                                          = NotForDefinition);
1436
1437
  bool GetCPUAndFeaturesAttributes(GlobalDecl GD,
1438
                                   llvm::AttrBuilder &AttrBuilder);
1439
  void setNonAliasAttributes(GlobalDecl GD, llvm::GlobalObject *GO);
1440
1441
  /// Set function attributes for a function declaration.
1442
  void SetFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1443
                             bool IsIncompleteFunction, bool IsThunk);
1444
1445
  void EmitGlobalDefinition(GlobalDecl D, llvm::GlobalValue *GV = nullptr);
1446
1447
  void EmitGlobalFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1448
  void EmitMultiVersionFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1449
1450
  void EmitGlobalVarDefinition(const VarDecl *D, bool IsTentative = false);
1451
  void EmitExternalVarDeclaration(const VarDecl *D);
1452
  void EmitAliasDefinition(GlobalDecl GD);
1453
  void emitIFuncDefinition(GlobalDecl GD);
1454
  void emitCPUDispatchDefinition(GlobalDecl GD);
1455
  void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
1456
  void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
1457
1458
  // C++ related functions.
1459
1460
  void EmitDeclContext(const DeclContext *DC);
1461
  void EmitLinkageSpec(const LinkageSpecDecl *D);
1462
1463
  /// Emit the function that initializes C++ thread_local variables.
1464
  void EmitCXXThreadLocalInitFunc();
1465
1466
  /// Emit the function that initializes C++ globals.
1467
  void EmitCXXGlobalInitFunc();
1468
1469
  /// Emit the function that performs cleanup associated with C++ globals.
1470
  void EmitCXXGlobalCleanUpFunc();
1471
1472
  /// Emit the function that initializes the specified global (if PerformInit is
1473
  /// true) and registers its destructor.
1474
  void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
1475
                                    llvm::GlobalVariable *Addr,
1476
                                    bool PerformInit);
1477
1478
  void EmitPointerToInitFunc(const VarDecl *VD, llvm::GlobalVariable *Addr,
1479
                             llvm::Function *InitFunc, InitSegAttr *ISA);
1480
1481
  // FIXME: Hardcoding priority here is gross.
1482
  void AddGlobalCtor(llvm::Function *Ctor, int Priority = 65535,
1483
                     llvm::Constant *AssociatedData = nullptr);
1484
  void AddGlobalDtor(llvm::Function *Dtor, int Priority = 65535,
1485
                     bool IsDtorAttrFunc = false);
1486
1487
  /// EmitCtorList - Generates a global array of functions and priorities using
1488
  /// the given list and name. This array will have appending linkage and is
1489
  /// suitable for use as a LLVM constructor or destructor array. Clears Fns.
1490
  void EmitCtorList(CtorList &Fns, const char *GlobalName);
1491
1492
  /// Emit any needed decls for which code generation was deferred.
1493
  void EmitDeferred();
1494
1495
  /// Try to emit external vtables as available_externally if they have emitted
1496
  /// all inlined virtual functions.  It runs after EmitDeferred() and therefore
1497
  /// is not allowed to create new references to things that need to be emitted
1498
  /// lazily.
1499
  void EmitVTablesOpportunistically();
1500
1501
  /// Call replaceAllUsesWith on all pairs in Replacements.
1502
  void applyReplacements();
1503
1504
  /// Call replaceAllUsesWith on all pairs in GlobalValReplacements.
1505
  void applyGlobalValReplacements();
1506
1507
  void checkAliases();
1508
1509
  std::map<int, llvm::TinyPtrVector<llvm::Function *>> DtorsUsingAtExit;
1510
1511
  /// Register functions annotated with __attribute__((destructor)) using
1512
  /// __cxa_atexit, if it is available, or atexit otherwise.
1513
  void registerGlobalDtorsWithAtExit();
1514
1515
  // When using sinit and sterm functions, unregister
1516
  // __attribute__((destructor)) annotated functions which were previously
1517
  // registered by the atexit subroutine using unatexit.
1518
  void unregisterGlobalDtorsWithUnAtExit();
1519
1520
  void emitMultiVersionFunctions();
1521
1522
  /// Emit any vtables which we deferred and still have a use for.
1523
  void EmitDeferredVTables();
1524
1525
  /// Emit a dummy function that reference a CoreFoundation symbol when
1526
  /// @available is used on Darwin.
1527
  void emitAtAvailableLinkGuard();
1528
1529
  /// Emit the llvm.used and llvm.compiler.used metadata.
1530
  void emitLLVMUsed();
1531
1532
  /// Emit the link options introduced by imported modules.
1533
  void EmitModuleLinkOptions();
1534
1535
  /// Emit aliases for internal-linkage declarations inside "C" language
1536
  /// linkage specifications, giving them the "expected" name where possible.
1537
  void EmitStaticExternCAliases();
1538
1539
  void EmitDeclMetadata();
1540
1541
  /// Emit the Clang version as llvm.ident metadata.
1542
  void EmitVersionIdentMetadata();
1543
1544
  /// Emit the Clang commandline as llvm.commandline metadata.
1545
  void EmitCommandLineMetadata();
1546
1547
  /// Emit the module flag metadata used to pass options controlling the
1548
  /// the backend to LLVM.
1549
  void EmitBackendOptionsMetadata(const CodeGenOptions CodeGenOpts);
1550
1551
  /// Emits OpenCL specific Metadata e.g. OpenCL version.
1552
  void EmitOpenCLMetadata();
1553
1554
  /// Emit the llvm.gcov metadata used to tell LLVM where to emit the .gcno and
1555
  /// .gcda files in a way that persists in .bc files.
1556
  void EmitCoverageFile();
1557
1558
  /// Determine whether the definition must be emitted; if this returns \c
1559
  /// false, the definition can be emitted lazily if it's used.
1560
  bool MustBeEmitted(const ValueDecl *D);
1561
1562
  /// Determine whether the definition can be emitted eagerly, or should be
1563
  /// delayed until the end of the translation unit. This is relevant for
1564
  /// definitions whose linkage can change, e.g. implicit function instantions
1565
  /// which may later be explicitly instantiated.
1566
  bool MayBeEmittedEagerly(const ValueDecl *D);
1567
1568
  /// Check whether we can use a "simpler", more core exceptions personality
1569
  /// function.
1570
  void SimplifyPersonality();
1571
1572
  /// Helper function for ConstructAttributeList and
1573
  /// addDefaultFunctionDefinitionAttributes.  Builds a set of function
1574
  /// attributes to add to a function with the given properties.
1575
  void getDefaultFunctionAttributes(StringRef Name, bool HasOptnone,
1576
                                    bool AttrOnCallSite,
1577
                                    llvm::AttrBuilder &FuncAttrs);
1578
1579
  llvm::Metadata *CreateMetadataIdentifierImpl(QualType T, MetadataTypeMap &Map,
1580
                                               StringRef Suffix);
1581
};
1582
1583
}  // end namespace CodeGen
1584
}  // end namespace clang
1585
1586
#endif // LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H