Coverage Report

Created: 2020-09-22 08:39

/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;
49
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)
110
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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619
  }
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};
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struct ObjCEntrypoints {
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12.6k
  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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        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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5
  void addMissing(bool MainFile) {
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5
    if (MainFile)
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      ++MissingInMainFile;
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    ++Missing;
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5
  }
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  /// Record that a function we've visited has mismatched profile data.
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9
  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 || 
Mismatched49
; }
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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).
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  llvm::SmallVector<std::pair<llvm::GlobalValue *, llvm::Constant *>, 8>
368
    GlobalValReplacements;
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  /// Variables for which we've emitted globals containing their constant
371
  /// 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.
380
  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;
386
  /// 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;
398
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  /// An ordered map of canonical GlobalDecls to their mangled names.
400
  llvm::MapVector<GlobalDecl, StringRef> MangledDeclNames;
401
  llvm::StringMap<GlobalDecl, llvm::BumpPtrAllocator> Manglings;
402
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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
  llvm::StringMap<llvm::GlobalVariable *> CFConstantStringMap;
417
418
  llvm::DenseMap<llvm::Constant *, llvm::GlobalVariable *> ConstantStringMap;
419
  llvm::DenseMap<const Decl*, llvm::Constant *> StaticLocalDeclMap;
420
  llvm::DenseMap<const Decl*, llvm::GlobalVariable*> StaticLocalDeclGuardMap;
421
  llvm::DenseMap<const Expr*, llvm::Constant *> MaterializedGlobalTemporaryMap;
422
423
  llvm::DenseMap<QualType, llvm::Constant *> AtomicSetterHelperFnMap;
424
  llvm::DenseMap<QualType, llvm::Constant *> AtomicGetterHelperFnMap;
425
426
  /// Map used to get unique type descriptor constants for sanitizers.
427
  llvm::DenseMap<QualType, llvm::Constant *> TypeDescriptorMap;
428
429
  /// Map used to track internal linkage functions declared within
430
  /// extern "C" regions.
431
  typedef llvm::MapVector<IdentifierInfo *,
432
                          llvm::GlobalValue *> StaticExternCMap;
433
  StaticExternCMap StaticExternCValues;
434
435
  /// thread_local variables defined or used in this TU.
436
  std::vector<const VarDecl *> CXXThreadLocals;
437
438
  /// thread_local variables with initializers that need to run
439
  /// before any thread_local variable in this TU is odr-used.
440
  std::vector<llvm::Function *> CXXThreadLocalInits;
441
  std::vector<const VarDecl *> CXXThreadLocalInitVars;
442
443
  /// Global variables with initializers that need to run before main.
444
  std::vector<llvm::Function *> CXXGlobalInits;
445
446
  /// When a C++ decl with an initializer is deferred, null is
447
  /// appended to CXXGlobalInits, and the index of that null is placed
448
  /// here so that the initializer will be performed in the correct
449
  /// order. Once the decl is emitted, the index is replaced with ~0U to ensure
450
  /// that we don't re-emit the initializer.
451
  llvm::DenseMap<const Decl*, unsigned> DelayedCXXInitPosition;
452
453
  typedef std::pair<OrderGlobalInits, llvm::Function*> GlobalInitData;
454
455
  struct GlobalInitPriorityCmp {
456
    bool operator()(const GlobalInitData &LHS,
457
615
                    const GlobalInitData &RHS) const {
458
615
      return LHS.first.priority < RHS.first.priority;
459
615
    }
460
  };
461
462
  /// Global variables with initializers whose order of initialization is set by
463
  /// init_priority attribute.
464
  SmallVector<GlobalInitData, 8> PrioritizedCXXGlobalInits;
465
466
  /// Global destructor functions and arguments that need to run on termination.
467
  /// When UseSinitAndSterm is set, it instead contains sterm finalizer
468
  /// functions, which also run on unloading a shared library.
469
  std::vector<
470
      std::tuple<llvm::FunctionType *, llvm::WeakTrackingVH, llvm::Constant *>>
471
      CXXGlobalDtorsOrStermFinalizers;
472
473
  /// The complete set of modules that has been imported.
474
  llvm::SetVector<clang::Module *> ImportedModules;
475
476
  /// The set of modules for which the module initializers
477
  /// have been emitted.
478
  llvm::SmallPtrSet<clang::Module *, 16> EmittedModuleInitializers;
479
480
  /// A vector of metadata strings for linker options.
481
  SmallVector<llvm::MDNode *, 16> LinkerOptionsMetadata;
482
483
  /// A vector of metadata strings for dependent libraries for ELF.
484
  SmallVector<llvm::MDNode *, 16> ELFDependentLibraries;
485
486
  /// @name Cache for Objective-C runtime types
487
  /// @{
488
489
  /// Cached reference to the class for constant strings. This value has type
490
  /// int * but is actually an Obj-C class pointer.
491
  llvm::WeakTrackingVH CFConstantStringClassRef;
492
493
  /// The type used to describe the state of a fast enumeration in
494
  /// Objective-C's for..in loop.
495
  QualType ObjCFastEnumerationStateType;
496
497
  /// @}
498
499
  /// Lazily create the Objective-C runtime
500
  void createObjCRuntime();
501
502
  void createOpenCLRuntime();
503
  void createOpenMPRuntime();
504
  void createCUDARuntime();
505
506
  bool isTriviallyRecursive(const FunctionDecl *F);
507
  bool shouldEmitFunction(GlobalDecl GD);
508
  bool shouldOpportunisticallyEmitVTables();
509
  /// Map used to be sure we don't emit the same CompoundLiteral twice.
510
  llvm::DenseMap<const CompoundLiteralExpr *, llvm::GlobalVariable *>
511
      EmittedCompoundLiterals;
512
513
  /// Map of the global blocks we've emitted, so that we don't have to re-emit
514
  /// them if the constexpr evaluator gets aggressive.
515
  llvm::DenseMap<const BlockExpr *, llvm::Constant *> EmittedGlobalBlocks;
516
517
  /// @name Cache for Blocks Runtime Globals
518
  /// @{
519
520
  llvm::Constant *NSConcreteGlobalBlock = nullptr;
521
  llvm::Constant *NSConcreteStackBlock = nullptr;
522
523
  llvm::FunctionCallee BlockObjectAssign = nullptr;
524
  llvm::FunctionCallee BlockObjectDispose = nullptr;
525
526
  llvm::Type *BlockDescriptorType = nullptr;
527
  llvm::Type *GenericBlockLiteralType = nullptr;
528
529
  struct {
530
    int GlobalUniqueCount;
531
  } Block;
532
533
  GlobalDecl initializedGlobalDecl;
534
535
  /// @}
536
537
  /// void @llvm.lifetime.start(i64 %size, i8* nocapture <ptr>)
538
  llvm::Function *LifetimeStartFn = nullptr;
539
540
  /// void @llvm.lifetime.end(i64 %size, i8* nocapture <ptr>)
541
  llvm::Function *LifetimeEndFn = nullptr;
542
543
  std::unique_ptr<SanitizerMetadata> SanitizerMD;
544
545
  llvm::MapVector<const Decl *, bool> DeferredEmptyCoverageMappingDecls;
546
547
  std::unique_ptr<CoverageMappingModuleGen> CoverageMapping;
548
549
  /// Mapping from canonical types to their metadata identifiers. We need to
550
  /// maintain this mapping because identifiers may be formed from distinct
551
  /// MDNodes.
552
  typedef llvm::DenseMap<QualType, llvm::Metadata *> MetadataTypeMap;
553
  MetadataTypeMap MetadataIdMap;
554
  MetadataTypeMap VirtualMetadataIdMap;
555
  MetadataTypeMap GeneralizedMetadataIdMap;
556
557
public:
558
  CodeGenModule(ASTContext &C, const HeaderSearchOptions &headersearchopts,
559
                const PreprocessorOptions &ppopts,
560
                const CodeGenOptions &CodeGenOpts, llvm::Module &M,
561
                DiagnosticsEngine &Diags,
562
                CoverageSourceInfo *CoverageInfo = nullptr);
563
564
  ~CodeGenModule();
565
566
  void clear();
567
568
  /// Finalize LLVM code generation.
569
  void Release();
570
571
  /// Return true if we should emit location information for expressions.
572
  bool getExpressionLocationsEnabled() const;
573
574
  /// Return a reference to the configured Objective-C runtime.
575
26.3k
  CGObjCRuntime &getObjCRuntime() {
576
26.3k
    if (!ObjCRuntime) 
createObjCRuntime()0
;
577
26.3k
    return *ObjCRuntime;
578
26.3k
  }
579
580
  /// Return true iff an Objective-C runtime has been configured.
581
0
  bool hasObjCRuntime() { return !!ObjCRuntime; }
582
583
  /// Return a reference to the configured OpenCL runtime.
584
642
  CGOpenCLRuntime &getOpenCLRuntime() {
585
642
    assert(OpenCLRuntime != nullptr);
586
642
    return *OpenCLRuntime;
587
642
  }
588
589
  /// Return a reference to the configured OpenMP runtime.
590
869k
  CGOpenMPRuntime &getOpenMPRuntime() {
591
869k
    assert(OpenMPRuntime != nullptr);
592
869k
    return *OpenMPRuntime;
593
869k
  }
594
595
  /// Return a reference to the configured CUDA runtime.
596
195
  CGCUDARuntime &getCUDARuntime() {
597
195
    assert(CUDARuntime != nullptr);
598
195
    return *CUDARuntime;
599
195
  }
600
601
6.70k
  ObjCEntrypoints &getObjCEntrypoints() const {
602
6.70k
    assert(ObjCData != nullptr);
603
6.70k
    return *ObjCData;
604
6.70k
  }
605
606
  // Version checking function, used to implement ObjC's @available:
607
  // i32 @__isOSVersionAtLeast(i32, i32, i32)
608
  llvm::FunctionCallee IsOSVersionAtLeastFn = nullptr;
609
610
213
  InstrProfStats &getPGOStats() { return PGOStats; }
611
272k
  llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); }
612
613
387
  CoverageMappingModuleGen *getCoverageMapping() const {
614
387
    return CoverageMapping.get();
615
387
  }
616
617
22
  llvm::Constant *getStaticLocalDeclAddress(const VarDecl *D) {
618
22
    return StaticLocalDeclMap[D];
619
22
  }
620
  void setStaticLocalDeclAddress(const VarDecl *D,
621
21.0k
                                 llvm::Constant *C) {
622
21.0k
    StaticLocalDeclMap[D] = C;
623
21.0k
  }
624
625
  llvm::Constant *
626
  getOrCreateStaticVarDecl(const VarDecl &D,
627
                           llvm::GlobalValue::LinkageTypes Linkage);
628
629
7.28k
  llvm::GlobalVariable *getStaticLocalDeclGuardAddress(const VarDecl *D) {
630
7.28k
    return StaticLocalDeclGuardMap[D];
631
7.28k
  }
632
  void setStaticLocalDeclGuardAddress(const VarDecl *D,
633
7.28k
                                      llvm::GlobalVariable *C) {
634
7.28k
    StaticLocalDeclGuardMap[D] = C;
635
7.28k
  }
636
637
  Address createUnnamedGlobalFrom(const VarDecl &D, llvm::Constant *Constant,
638
                                  CharUnits Align);
639
640
  bool lookupRepresentativeDecl(StringRef MangledName,
641
                                GlobalDecl &Result) const;
642
643
7
  llvm::Constant *getAtomicSetterHelperFnMap(QualType Ty) {
644
7
    return AtomicSetterHelperFnMap[Ty];
645
7
  }
646
  void setAtomicSetterHelperFnMap(QualType Ty,
647
5
                            llvm::Constant *Fn) {
648
5
    AtomicSetterHelperFnMap[Ty] = Fn;
649
5
  }
650
651
6
  llvm::Constant *getAtomicGetterHelperFnMap(QualType Ty) {
652
6
    return AtomicGetterHelperFnMap[Ty];
653
6
  }
654
  void setAtomicGetterHelperFnMap(QualType Ty,
655
4
                            llvm::Constant *Fn) {
656
4
    AtomicGetterHelperFnMap[Ty] = Fn;
657
4
  }
658
659
2.66k
  llvm::Constant *getTypeDescriptorFromMap(QualType Ty) {
660
2.66k
    return TypeDescriptorMap[Ty];
661
2.66k
  }
662
542
  void setTypeDescriptorInMap(QualType Ty, llvm::Constant *C) {
663
542
    TypeDescriptorMap[Ty] = C;
664
542
  }
665
666
7.27M
  CGDebugInfo *getModuleDebugInfo() { return DebugInfo.get(); }
667
668
317
  llvm::MDNode *getNoObjCARCExceptionsMetadata() {
669
317
    if (!NoObjCARCExceptionsMetadata)
670
22
      NoObjCARCExceptionsMetadata = llvm::MDNode::get(getLLVMContext(), None);
671
317
    return NoObjCARCExceptionsMetadata;
672
317
  }
673
674
62.2M
  ASTContext &getContext() const { return Context; }
675
24.5M
  const LangOptions &getLangOpts() const { return LangOpts; }
676
  const HeaderSearchOptions &getHeaderSearchOpts()
677
3.39k
    const { return HeaderSearchOpts; }
678
  const PreprocessorOptions &getPreprocessorOpts()
679
24.1k
    const { return PreprocessorOpts; }
680
20.4M
  const CodeGenOptions &getCodeGenOpts() const { return CodeGenOpts; }
681
4.49M
  llvm::Module &getModule() const { return TheModule; }
682
43.4k
  DiagnosticsEngine &getDiags() const { return Diags; }
683
1.40M
  const llvm::DataLayout &getDataLayout() const {
684
1.40M
    return TheModule.getDataLayout();
685
1.40M
  }
686
5.05M
  const TargetInfo &getTarget() const { return Target; }
687
1.40M
  const llvm::Triple &getTriple() const { return Target.getTriple(); }
688
  bool supportsCOMDAT() const;
689
  void maybeSetTrivialComdat(const Decl &D, llvm::GlobalObject &GO);
690
691
4.35M
  CGCXXABI &getCXXABI() const { return *ABI; }
692
5.40M
  llvm::LLVMContext &getLLVMContext() { return VMContext; }
693
694
0
  bool shouldUseTBAA() const { return TBAA != nullptr; }
695
696
  const TargetCodeGenInfo &getTargetCodeGenInfo();
697
698
6.86M
  CodeGenTypes &getTypes() { return Types; }
699
700
13.7k
  CodeGenVTables &getVTables() { return VTables; }
701
702
47.7k
  ItaniumVTableContext &getItaniumVTableContext() {
703
47.7k
    return VTables.getItaniumVTableContext();
704
47.7k
  }
705
706
8.05k
  MicrosoftVTableContext &getMicrosoftVTableContext() {
707
8.05k
    return VTables.getMicrosoftVTableContext();
708
8.05k
  }
709
710
0
  CtorList &getGlobalCtors() { return GlobalCtors; }
711
0
  CtorList &getGlobalDtors() { return GlobalDtors; }
712
713
  /// getTBAATypeInfo - Get metadata used to describe accesses to objects of
714
  /// the given type.
715
  llvm::MDNode *getTBAATypeInfo(QualType QTy);
716
717
  /// getTBAAAccessInfo - Get TBAA information that describes an access to
718
  /// an object of the given type.
719
  TBAAAccessInfo getTBAAAccessInfo(QualType AccessType);
720
721
  /// getTBAAVTablePtrAccessInfo - Get the TBAA information that describes an
722
  /// access to a virtual table pointer.
723
  TBAAAccessInfo getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType);
724
725
  llvm::MDNode *getTBAAStructInfo(QualType QTy);
726
727
  /// getTBAABaseTypeInfo - Get metadata that describes the given base access
728
  /// type. Return null if the type is not suitable for use in TBAA access tags.
729
  llvm::MDNode *getTBAABaseTypeInfo(QualType QTy);
730
731
  /// getTBAAAccessTagInfo - Get TBAA tag for a given memory access.
732
  llvm::MDNode *getTBAAAccessTagInfo(TBAAAccessInfo Info);
733
734
  /// mergeTBAAInfoForCast - Get merged TBAA information for the purposes of
735
  /// type casts.
736
  TBAAAccessInfo mergeTBAAInfoForCast(TBAAAccessInfo SourceInfo,
737
                                      TBAAAccessInfo TargetInfo);
738
739
  /// mergeTBAAInfoForConditionalOperator - Get merged TBAA information for the
740
  /// purposes of conditional operator.
741
  TBAAAccessInfo mergeTBAAInfoForConditionalOperator(TBAAAccessInfo InfoA,
742
                                                     TBAAAccessInfo InfoB);
743
744
  /// mergeTBAAInfoForMemoryTransfer - Get merged TBAA information for the
745
  /// purposes of memory transfer calls.
746
  TBAAAccessInfo mergeTBAAInfoForMemoryTransfer(TBAAAccessInfo DestInfo,
747
                                                TBAAAccessInfo SrcInfo);
748
749
  /// getTBAAInfoForSubobject - Get TBAA information for an access with a given
750
  /// base lvalue.
751
33.9k
  TBAAAccessInfo getTBAAInfoForSubobject(LValue Base, QualType AccessType) {
752
33.9k
    if (Base.getTBAAInfo().isMayAlias())
753
430
      return TBAAAccessInfo::getMayAliasInfo();
754
33.5k
    return getTBAAAccessInfo(AccessType);
755
33.5k
  }
756
757
  bool isTypeConstant(QualType QTy, bool ExcludeCtorDtor);
758
759
  bool isPaddedAtomicType(QualType type);
760
  bool isPaddedAtomicType(const AtomicType *type);
761
762
  /// DecorateInstructionWithTBAA - Decorate the instruction with a TBAA tag.
763
  void DecorateInstructionWithTBAA(llvm::Instruction *Inst,
764
                                   TBAAAccessInfo TBAAInfo);
765
766
  /// Adds !invariant.barrier !tag to instruction
767
  void DecorateInstructionWithInvariantGroup(llvm::Instruction *I,
768
                                             const CXXRecordDecl *RD);
769
770
  /// Emit the given number of characters as a value of type size_t.
771
  llvm::ConstantInt *getSize(CharUnits numChars);
772
773
  /// Set the visibility for the given LLVM GlobalValue.
774
  void setGlobalVisibility(llvm::GlobalValue *GV, const NamedDecl *D) const;
775
776
  void setDSOLocal(llvm::GlobalValue *GV) const;
777
778
  void setDLLImportDLLExport(llvm::GlobalValue *GV, GlobalDecl D) const;
779
  void setDLLImportDLLExport(llvm::GlobalValue *GV, const NamedDecl *D) const;
780
  /// Set visibility, dllimport/dllexport and dso_local.
781
  /// This must be called after dllimport/dllexport is set.
782
  void setGVProperties(llvm::GlobalValue *GV, GlobalDecl GD) const;
783
  void setGVProperties(llvm::GlobalValue *GV, const NamedDecl *D) const;
784
785
  void setGVPropertiesAux(llvm::GlobalValue *GV, const NamedDecl *D) const;
786
787
  /// Set the TLS mode for the given LLVM GlobalValue for the thread-local
788
  /// variable declaration D.
789
  void setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const;
790
791
  /// Get LLVM TLS mode from CodeGenOptions.
792
  llvm::GlobalVariable::ThreadLocalMode GetDefaultLLVMTLSModel() const;
793
794
366k
  static llvm::GlobalValue::VisibilityTypes GetLLVMVisibility(Visibility V) {
795
366k
    switch (V) {
796
217k
    case DefaultVisibility:   return llvm::GlobalValue::DefaultVisibility;
797
148k
    case HiddenVisibility:    return llvm::GlobalValue::HiddenVisibility;
798
111
    case ProtectedVisibility: return llvm::GlobalValue::ProtectedVisibility;
799
0
    }
800
0
    llvm_unreachable("unknown visibility!");
801
0
  }
802
803
  llvm::Constant *GetAddrOfGlobal(GlobalDecl GD,
804
                                  ForDefinition_t IsForDefinition
805
                                    = NotForDefinition);
806
807
  /// Will return a global variable of the given type. If a variable with a
808
  /// different type already exists then a new  variable with the right type
809
  /// will be created and all uses of the old variable will be replaced with a
810
  /// bitcast to the new variable.
811
  llvm::GlobalVariable *
812
  CreateOrReplaceCXXRuntimeVariable(StringRef Name, llvm::Type *Ty,
813
                                    llvm::GlobalValue::LinkageTypes Linkage,
814
                                    unsigned Alignment);
815
816
  llvm::Function *CreateGlobalInitOrCleanUpFunction(
817
      llvm::FunctionType *ty, const Twine &name, const CGFunctionInfo &FI,
818
      SourceLocation Loc = SourceLocation(), bool TLS = false);
819
820
  /// Return the AST address space of the underlying global variable for D, as
821
  /// determined by its declaration. Normally this is the same as the address
822
  /// space of D's type, but in CUDA, address spaces are associated with
823
  /// declarations, not types. If D is nullptr, return the default address
824
  /// space for global variable.
825
  ///
826
  /// For languages without explicit address spaces, if D has default address
827
  /// space, target-specific global or constant address space may be returned.
828
  LangAS GetGlobalVarAddressSpace(const VarDecl *D);
829
830
  /// Return the llvm::Constant for the address of the given global variable.
831
  /// If Ty is non-null and if the global doesn't exist, then it will be created
832
  /// with the specified type instead of whatever the normal requested type
833
  /// would be. If IsForDefinition is true, it is guaranteed that an actual
834
  /// global with type Ty will be returned, not conversion of a variable with
835
  /// the same mangled name but some other type.
836
  llvm::Constant *GetAddrOfGlobalVar(const VarDecl *D,
837
                                     llvm::Type *Ty = nullptr,
838
                                     ForDefinition_t IsForDefinition
839
                                       = NotForDefinition);
840
841
  /// Return the AST address space of string literal, which is used to emit
842
  /// the string literal as global variable in LLVM IR.
843
  /// Note: This is not necessarily the address space of the string literal
844
  /// in AST. For address space agnostic language, e.g. C++, string literal
845
  /// in AST is always in default address space.
846
  LangAS getStringLiteralAddressSpace() const;
847
848
  /// Return the address of the given function. If Ty is non-null, then this
849
  /// function will use the specified type if it has to create it.
850
  llvm::Constant *GetAddrOfFunction(GlobalDecl GD, llvm::Type *Ty = nullptr,
851
                                    bool ForVTable = false,
852
                                    bool DontDefer = false,
853
                                    ForDefinition_t IsForDefinition
854
                                      = NotForDefinition);
855
856
  /// Get the address of the RTTI descriptor for the given type.
857
  llvm::Constant *GetAddrOfRTTIDescriptor(QualType Ty, bool ForEH = false);
858
859
  /// Get the address of a GUID.
860
  ConstantAddress GetAddrOfMSGuidDecl(const MSGuidDecl *GD);
861
862
  /// Get the address of the thunk for the given global decl.
863
  llvm::Constant *GetAddrOfThunk(StringRef Name, llvm::Type *FnTy,
864
                                 GlobalDecl GD);
865
866
  /// Get a reference to the target of VD.
867
  ConstantAddress GetWeakRefReference(const ValueDecl *VD);
868
869
  /// Returns the assumed alignment of an opaque pointer to the given class.
870
  CharUnits getClassPointerAlignment(const CXXRecordDecl *CD);
871
872
  /// Returns the minimum object size for an object of the given class type
873
  /// (or a class derived from it).
874
  CharUnits getMinimumClassObjectSize(const CXXRecordDecl *CD);
875
876
  /// Returns the minimum object size for an object of the given type.
877
194k
  CharUnits getMinimumObjectSize(QualType Ty) {
878
194k
    if (CXXRecordDecl *RD = Ty->getAsCXXRecordDecl())
879
100k
      return getMinimumClassObjectSize(RD);
880
93.8k
    return getContext().getTypeSizeInChars(Ty);
881
93.8k
  }
882
883
  /// Returns the assumed alignment of a virtual base of a class.
884
  CharUnits getVBaseAlignment(CharUnits DerivedAlign,
885
                              const CXXRecordDecl *Derived,
886
                              const CXXRecordDecl *VBase);
887
888
  /// Given a class pointer with an actual known alignment, and the
889
  /// expected alignment of an object at a dynamic offset w.r.t that
890
  /// pointer, return the alignment to assume at the offset.
891
  CharUnits getDynamicOffsetAlignment(CharUnits ActualAlign,
892
                                      const CXXRecordDecl *Class,
893
                                      CharUnits ExpectedTargetAlign);
894
895
  CharUnits
896
  computeNonVirtualBaseClassOffset(const CXXRecordDecl *DerivedClass,
897
                                   CastExpr::path_const_iterator Start,
898
                                   CastExpr::path_const_iterator End);
899
900
  /// Returns the offset from a derived class to  a class. Returns null if the
901
  /// offset is 0.
902
  llvm::Constant *
903
  GetNonVirtualBaseClassOffset(const CXXRecordDecl *ClassDecl,
904
                               CastExpr::path_const_iterator PathBegin,
905
                               CastExpr::path_const_iterator PathEnd);
906
907
  llvm::FoldingSet<BlockByrefHelpers> ByrefHelpersCache;
908
909
  /// Fetches the global unique block count.
910
159
  int getUniqueBlockCount() { return ++Block.GlobalUniqueCount; }
911
912
  /// Fetches the type of a generic block descriptor.
913
  llvm::Type *getBlockDescriptorType();
914
915
  /// The type of a generic block literal.
916
  llvm::Type *getGenericBlockLiteralType();
917
918
  /// Gets the address of a block which requires no captures.
919
  llvm::Constant *GetAddrOfGlobalBlock(const BlockExpr *BE, StringRef Name);
920
921
  /// Returns the address of a block which requires no caputres, or null if
922
  /// we've yet to emit the block for BE.
923
1.07k
  llvm::Constant *getAddrOfGlobalBlockIfEmitted(const BlockExpr *BE) {
924
1.07k
    return EmittedGlobalBlocks.lookup(BE);
925
1.07k
  }
926
927
  /// Notes that BE's global block is available via Addr. Asserts that BE
928
  /// isn't already emitted.
929
  void setAddrOfGlobalBlock(const BlockExpr *BE, llvm::Constant *Addr);
930
931
  /// Return a pointer to a constant CFString object for the given string.
932
  ConstantAddress GetAddrOfConstantCFString(const StringLiteral *Literal);
933
934
  /// Return a pointer to a constant NSString object for the given string. Or a
935
  /// user defined String object as defined via
936
  /// -fconstant-string-class=class_name option.
937
  ConstantAddress GetAddrOfConstantString(const StringLiteral *Literal);
938
939
  /// Return a constant array for the given string.
940
  llvm::Constant *GetConstantArrayFromStringLiteral(const StringLiteral *E);
941
942
  /// Return a pointer to a constant array for the given string literal.
943
  ConstantAddress
944
  GetAddrOfConstantStringFromLiteral(const StringLiteral *S,
945
                                     StringRef Name = ".str");
946
947
  /// Return a pointer to a constant array for the given ObjCEncodeExpr node.
948
  ConstantAddress
949
  GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *);
950
951
  /// Returns a pointer to a character array containing the literal and a
952
  /// terminating '\0' character. The result has pointer to array type.
953
  ///
954
  /// \param GlobalName If provided, the name to use for the global (if one is
955
  /// created).
956
  ConstantAddress
957
  GetAddrOfConstantCString(const std::string &Str,
958
                           const char *GlobalName = nullptr);
959
960
  /// Returns a pointer to a constant global variable for the given file-scope
961
  /// compound literal expression.
962
  ConstantAddress GetAddrOfConstantCompoundLiteral(const CompoundLiteralExpr*E);
963
964
  /// If it's been emitted already, returns the GlobalVariable corresponding to
965
  /// a compound literal. Otherwise, returns null.
966
  llvm::GlobalVariable *
967
  getAddrOfConstantCompoundLiteralIfEmitted(const CompoundLiteralExpr *E);
968
969
  /// Notes that CLE's GlobalVariable is GV. Asserts that CLE isn't already
970
  /// emitted.
971
  void setAddrOfConstantCompoundLiteral(const CompoundLiteralExpr *CLE,
972
                                        llvm::GlobalVariable *GV);
973
974
  /// Returns a pointer to a global variable representing a temporary
975
  /// with static or thread storage duration.
976
  ConstantAddress GetAddrOfGlobalTemporary(const MaterializeTemporaryExpr *E,
977
                                           const Expr *Inner);
978
979
  /// Retrieve the record type that describes the state of an
980
  /// Objective-C fast enumeration loop (for..in).
981
  QualType getObjCFastEnumerationStateType();
982
983
  // Produce code for this constructor/destructor. This method doesn't try
984
  // to apply any ABI rules about which other constructors/destructors
985
  // are needed or if they are alias to each other.
986
  llvm::Function *codegenCXXStructor(GlobalDecl GD);
987
988
  /// Return the address of the constructor/destructor of the given type.
989
  llvm::Constant *
990
  getAddrOfCXXStructor(GlobalDecl GD, const CGFunctionInfo *FnInfo = nullptr,
991
                       llvm::FunctionType *FnType = nullptr,
992
                       bool DontDefer = false,
993
185k
                       ForDefinition_t IsForDefinition = NotForDefinition) {
994
185k
    return cast<llvm::Constant>(getAddrAndTypeOfCXXStructor(GD, FnInfo, FnType,
995
185k
                                                            DontDefer,
996
185k
                                                            IsForDefinition)
997
185k
                                    .getCallee());
998
185k
  }
999
1000
  llvm::FunctionCallee getAddrAndTypeOfCXXStructor(
1001
      GlobalDecl GD, const CGFunctionInfo *FnInfo = nullptr,
1002
      llvm::FunctionType *FnType = nullptr, bool DontDefer = false,
1003
      ForDefinition_t IsForDefinition = NotForDefinition);
1004
1005
  /// Given a builtin id for a function like "__builtin_fabsf", return a
1006
  /// Function* for "fabsf".
1007
  llvm::Constant *getBuiltinLibFunction(const FunctionDecl *FD,
1008
                                        unsigned BuiltinID);
1009
1010
  llvm::Function *getIntrinsic(unsigned IID, ArrayRef<llvm::Type*> Tys = None);
1011
1012
  /// Emit code for a single top level declaration.
1013
  void EmitTopLevelDecl(Decl *D);
1014
1015
  /// Stored a deferred empty coverage mapping for an unused
1016
  /// and thus uninstrumented top level declaration.
1017
  void AddDeferredUnusedCoverageMapping(Decl *D);
1018
1019
  /// Remove the deferred empty coverage mapping as this
1020
  /// declaration is actually instrumented.
1021
  void ClearUnusedCoverageMapping(const Decl *D);
1022
1023
  /// Emit all the deferred coverage mappings
1024
  /// for the uninstrumented functions.
1025
  void EmitDeferredUnusedCoverageMappings();
1026
1027
  /// Emit an alias for "main" if it has no arguments (needed for wasm).
1028
  void EmitMainVoidAlias();
1029
1030
  /// Tell the consumer that this variable has been instantiated.
1031
  void HandleCXXStaticMemberVarInstantiation(VarDecl *VD);
1032
1033
  /// If the declaration has internal linkage but is inside an
1034
  /// extern "C" linkage specification, prepare to emit an alias for it
1035
  /// to the expected name.
1036
  template<typename SomeDecl>
1037
  void MaybeHandleStaticInExternC(const SomeDecl *D, llvm::GlobalValue *GV);
1038
1039
  /// Add a global to a list to be added to the llvm.used metadata.
1040
  void addUsedGlobal(llvm::GlobalValue *GV);
1041
1042
  /// Add a global to a list to be added to the llvm.compiler.used metadata.
1043
  void addCompilerUsedGlobal(llvm::GlobalValue *GV);
1044
1045
  /// Add a destructor and object to add to the C++ global destructor function.
1046
6
  void AddCXXDtorEntry(llvm::FunctionCallee DtorFn, llvm::Constant *Object) {
1047
6
    CXXGlobalDtorsOrStermFinalizers.emplace_back(DtorFn.getFunctionType(),
1048
6
                                                 DtorFn.getCallee(), Object);
1049
6
  }
1050
1051
  /// Add an sterm finalizer to the C++ global cleanup function.
1052
16
  void AddCXXStermFinalizerEntry(llvm::FunctionCallee DtorFn) {
1053
16
    CXXGlobalDtorsOrStermFinalizers.emplace_back(DtorFn.getFunctionType(),
1054
16
                                                 DtorFn.getCallee(), nullptr);
1055
16
  }
1056
1057
  /// Add an sterm finalizer to its own llvm.global_dtors entry.
1058
  void AddCXXStermFinalizerToGlobalDtor(llvm::Function *StermFinalizer,
1059
6
                                        int Priority) {
1060
6
    AddGlobalDtor(StermFinalizer, Priority);
1061
6
  }
1062
1063
  /// Create or return a runtime function declaration with the specified type
1064
  /// and name. If \p AssumeConvergent is true, the call will have the
1065
  /// convergent attribute added.
1066
  llvm::FunctionCallee
1067
  CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name,
1068
                        llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1069
                        bool Local = false, bool AssumeConvergent = false);
1070
1071
  /// Create or return a runtime function declaration with the specified type
1072
  /// and name. This will automatically add the convergent attribute to the
1073
  /// function declaration.
1074
  llvm::FunctionCallee CreateConvergentRuntimeFunction(
1075
      llvm::FunctionType *Ty, StringRef Name,
1076
      llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1077
931
      bool Local = false) {
1078
931
    return CreateRuntimeFunction(Ty, Name, ExtraAttrs, Local, true);
1079
931
  }
1080
1081
  /// Create a new runtime global variable with the specified type and name.
1082
  llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
1083
                                        StringRef Name);
1084
1085
  ///@name Custom Blocks Runtime Interfaces
1086
  ///@{
1087
1088
  llvm::Constant *getNSConcreteGlobalBlock();
1089
  llvm::Constant *getNSConcreteStackBlock();
1090
  llvm::FunctionCallee getBlockObjectAssign();
1091
  llvm::FunctionCallee getBlockObjectDispose();
1092
1093
  ///@}
1094
1095
  llvm::Function *getLLVMLifetimeStartFn();
1096
  llvm::Function *getLLVMLifetimeEndFn();
1097
1098
  // Make sure that this type is translated.
1099
  void UpdateCompletedType(const TagDecl *TD);
1100
1101
  llvm::Constant *getMemberPointerConstant(const UnaryOperator *e);
1102
1103
  /// Emit type info if type of an expression is a variably modified
1104
  /// type. Also emit proper debug info for cast types.
1105
  void EmitExplicitCastExprType(const ExplicitCastExpr *E,
1106
                                CodeGenFunction *CGF = nullptr);
1107
1108
  /// Return the result of value-initializing the given type, i.e. a null
1109
  /// expression of the given type.  This is usually, but not always, an LLVM
1110
  /// null constant.
1111
  llvm::Constant *EmitNullConstant(QualType T);
1112
1113
  /// Return a null constant appropriate for zero-initializing a base class with
1114
  /// the given type. This is usually, but not always, an LLVM null constant.
1115
  llvm::Constant *EmitNullConstantForBase(const CXXRecordDecl *Record);
1116
1117
  /// Emit a general error that something can't be done.
1118
  void Error(SourceLocation loc, StringRef error);
1119
1120
  /// Print out an error that codegen doesn't support the specified stmt yet.
1121
  void ErrorUnsupported(const Stmt *S, const char *Type);
1122
1123
  /// Print out an error that codegen doesn't support the specified decl yet.
1124
  void ErrorUnsupported(const Decl *D, const char *Type);
1125
1126
  /// Set the attributes on the LLVM function for the given decl and function
1127
  /// info. This applies attributes necessary for handling the ABI as well as
1128
  /// user specified attributes like section.
1129
  void SetInternalFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1130
                                     const CGFunctionInfo &FI);
1131
1132
  /// Set the LLVM function attributes (sext, zext, etc).
1133
  void SetLLVMFunctionAttributes(GlobalDecl GD, const CGFunctionInfo &Info,
1134
                                 llvm::Function *F);
1135
1136
  /// Set the LLVM function attributes which only apply to a function
1137
  /// definition.
1138
  void SetLLVMFunctionAttributesForDefinition(const Decl *D, llvm::Function *F);
1139
1140
  /// Return true iff the given type uses 'sret' when used as a return type.
1141
  bool ReturnTypeUsesSRet(const CGFunctionInfo &FI);
1142
1143
  /// Return true iff the given type uses an argument slot when 'sret' is used
1144
  /// as a return type.
1145
  bool ReturnSlotInterferesWithArgs(const CGFunctionInfo &FI);
1146
1147
  /// Return true iff the given type uses 'fpret' when used as a return type.
1148
  bool ReturnTypeUsesFPRet(QualType ResultType);
1149
1150
  /// Return true iff the given type uses 'fp2ret' when used as a return type.
1151
  bool ReturnTypeUsesFP2Ret(QualType ResultType);
1152
1153
  /// Get the LLVM attributes and calling convention to use for a particular
1154
  /// function type.
1155
  ///
1156
  /// \param Name - The function name.
1157
  /// \param Info - The function type information.
1158
  /// \param CalleeInfo - The callee information these attributes are being
1159
  /// constructed for. If valid, the attributes applied to this decl may
1160
  /// contribute to the function attributes and calling convention.
1161
  /// \param Attrs [out] - On return, the attribute list to use.
1162
  /// \param CallingConv [out] - On return, the LLVM calling convention to use.
1163
  void ConstructAttributeList(StringRef Name, const CGFunctionInfo &Info,
1164
                              CGCalleeInfo CalleeInfo,
1165
                              llvm::AttributeList &Attrs, unsigned &CallingConv,
1166
                              bool AttrOnCallSite);
1167
1168
  /// Adds attributes to F according to our CodeGenOptions and LangOptions, as
1169
  /// though we had emitted it ourselves.  We remove any attributes on F that
1170
  /// conflict with the attributes we add here.
1171
  ///
1172
  /// This is useful for adding attrs to bitcode modules that you want to link
1173
  /// with but don't control, such as CUDA's libdevice.  When linking with such
1174
  /// a bitcode library, you might want to set e.g. its functions'
1175
  /// "unsafe-fp-math" attribute to match the attr of the functions you're
1176
  /// codegen'ing.  Otherwise, LLVM will interpret the bitcode module's lack of
1177
  /// unsafe-fp-math attrs as tantamount to unsafe-fp-math=false, and then LLVM
1178
  /// will propagate unsafe-fp-math=false up to every transitive caller of a
1179
  /// function in the bitcode library!
1180
  ///
1181
  /// With the exception of fast-math attrs, this will only make the attributes
1182
  /// on the function more conservative.  But it's unsafe to call this on a
1183
  /// function which relies on particular fast-math attributes for correctness.
1184
  /// It's up to you to ensure that this is safe.
1185
  void addDefaultFunctionDefinitionAttributes(llvm::Function &F);
1186
1187
  /// Like the overload taking a `Function &`, but intended specifically
1188
  /// for frontends that want to build on Clang's target-configuration logic.
1189
  void addDefaultFunctionDefinitionAttributes(llvm::AttrBuilder &attrs);
1190
1191
  StringRef getMangledName(GlobalDecl GD);
1192
  StringRef getBlockMangledName(GlobalDecl GD, const BlockDecl *BD);
1193
1194
  void EmitTentativeDefinition(const VarDecl *D);
1195
1196
  void EmitExternalDeclaration(const VarDecl *D);
1197
1198
  void EmitVTable(CXXRecordDecl *Class);
1199
1200
  void RefreshTypeCacheForClass(const CXXRecordDecl *Class);
1201
1202
  /// Appends Opts to the "llvm.linker.options" metadata value.
1203
  void AppendLinkerOptions(StringRef Opts);
1204
1205
  /// Appends a detect mismatch command to the linker options.
1206
  void AddDetectMismatch(StringRef Name, StringRef Value);
1207
1208
  /// Appends a dependent lib to the appropriate metadata value.
1209
  void AddDependentLib(StringRef Lib);
1210
1211
1212
  llvm::GlobalVariable::LinkageTypes getFunctionLinkage(GlobalDecl GD);
1213
1214
246k
  void setFunctionLinkage(GlobalDecl GD, llvm::Function *F) {
1215
246k
    F->setLinkage(getFunctionLinkage(GD));
1216
246k
  }
1217
1218
  /// Return the appropriate linkage for the vtable, VTT, and type information
1219
  /// of the given class.
1220
  llvm::GlobalVariable::LinkageTypes getVTableLinkage(const CXXRecordDecl *RD);
1221
1222
  /// Return the store size, in character units, of the given LLVM type.
1223
  CharUnits GetTargetTypeStoreSize(llvm::Type *Ty) const;
1224
1225
  /// Returns LLVM linkage for a declarator.
1226
  llvm::GlobalValue::LinkageTypes
1227
  getLLVMLinkageForDeclarator(const DeclaratorDecl *D, GVALinkage Linkage,
1228
                              bool IsConstantVariable);
1229
1230
  /// Returns LLVM linkage for a declarator.
1231
  llvm::GlobalValue::LinkageTypes
1232
  getLLVMLinkageVarDefinition(const VarDecl *VD, bool IsConstant);
1233
1234
  /// Emit all the global annotations.
1235
  void EmitGlobalAnnotations();
1236
1237
  /// Emit an annotation string.
1238
  llvm::Constant *EmitAnnotationString(StringRef Str);
1239
1240
  /// Emit the annotation's translation unit.
1241
  llvm::Constant *EmitAnnotationUnit(SourceLocation Loc);
1242
1243
  /// Emit the annotation line number.
1244
  llvm::Constant *EmitAnnotationLineNo(SourceLocation L);
1245
1246
  /// Generate the llvm::ConstantStruct which contains the annotation
1247
  /// information for a given GlobalValue. The annotation struct is
1248
  /// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
1249
  /// GlobalValue being annotated. The second field is the constant string
1250
  /// created from the AnnotateAttr's annotation. The third field is a constant
1251
  /// string containing the name of the translation unit. The fourth field is
1252
  /// the line number in the file of the annotated value declaration.
1253
  llvm::Constant *EmitAnnotateAttr(llvm::GlobalValue *GV,
1254
                                   const AnnotateAttr *AA,
1255
                                   SourceLocation L);
1256
1257
  /// Add global annotations that are set on D, for the global GV. Those
1258
  /// annotations are emitted during finalization of the LLVM code.
1259
  void AddGlobalAnnotations(const ValueDecl *D, llvm::GlobalValue *GV);
1260
1261
  bool isInSanitizerBlacklist(SanitizerMask Kind, llvm::Function *Fn,
1262
                              SourceLocation Loc) const;
1263
1264
  bool isInSanitizerBlacklist(llvm::GlobalVariable *GV, SourceLocation Loc,
1265
                              QualType Ty,
1266
                              StringRef Category = StringRef()) const;
1267
1268
  /// Imbue XRay attributes to a function, applying the always/never attribute
1269
  /// lists in the process. Returns true if we did imbue attributes this way,
1270
  /// false otherwise.
1271
  bool imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc,
1272
                      StringRef Category = StringRef()) const;
1273
1274
29.8k
  SanitizerMetadata *getSanitizerMetadata() {
1275
29.8k
    return SanitizerMD.get();
1276
29.8k
  }
1277
1278
2.95k
  void addDeferredVTable(const CXXRecordDecl *RD) {
1279
2.95k
    DeferredVTables.push_back(RD);
1280
2.95k
  }
1281
1282
  /// Emit code for a single global function or var decl. Forward declarations
1283
  /// are emitted lazily.
1284
  void EmitGlobal(GlobalDecl D);
1285
1286
  bool TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D);
1287
1288
  llvm::GlobalValue *GetGlobalValue(StringRef Ref);
1289
1290
  /// Set attributes which are common to any form of a global definition (alias,
1291
  /// Objective-C method, function, global variable).
1292
  ///
1293
  /// NOTE: This should only be called for definitions.
1294
  void SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV);
1295
1296
  void addReplacement(StringRef Name, llvm::Constant *C);
1297
1298
  void addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C);
1299
1300
  /// Emit a code for threadprivate directive.
1301
  /// \param D Threadprivate declaration.
1302
  void EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D);
1303
1304
  /// Emit a code for declare reduction construct.
1305
  void EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D,
1306
                               CodeGenFunction *CGF = nullptr);
1307
1308
  /// Emit a code for declare mapper construct.
1309
  void EmitOMPDeclareMapper(const OMPDeclareMapperDecl *D,
1310
                            CodeGenFunction *CGF = nullptr);
1311
1312
  /// Emit a code for requires directive.
1313
  /// \param D Requires declaration
1314
  void EmitOMPRequiresDecl(const OMPRequiresDecl *D);
1315
1316
  /// Returns whether the given record has hidden LTO visibility and therefore
1317
  /// may participate in (single-module) CFI and whole-program vtable
1318
  /// optimization.
1319
  bool HasHiddenLTOVisibility(const CXXRecordDecl *RD);
1320
1321
  /// Returns whether the given record has public std LTO visibility
1322
  /// and therefore may not participate in (single-module) CFI and whole-program
1323
  /// vtable optimization.
1324
  bool HasLTOVisibilityPublicStd(const CXXRecordDecl *RD);
1325
1326
  /// Returns the vcall visibility of the given type. This is the scope in which
1327
  /// a virtual function call could be made which ends up being dispatched to a
1328
  /// member function of this class. This scope can be wider than the visibility
1329
  /// of the class itself when the class has a more-visible dynamic base class.
1330
  llvm::GlobalObject::VCallVisibility
1331
  GetVCallVisibilityLevel(const CXXRecordDecl *RD);
1332
1333
  /// Emit type metadata for the given vtable using the given layout.
1334
  void EmitVTableTypeMetadata(const CXXRecordDecl *RD,
1335
                              llvm::GlobalVariable *VTable,
1336
                              const VTableLayout &VTLayout);
1337
1338
  /// Generate a cross-DSO type identifier for MD.
1339
  llvm::ConstantInt *CreateCrossDsoCfiTypeId(llvm::Metadata *MD);
1340
1341
  /// Create a metadata identifier for the given type. This may either be an
1342
  /// MDString (for external identifiers) or a distinct unnamed MDNode (for
1343
  /// internal identifiers).
1344
  llvm::Metadata *CreateMetadataIdentifierForType(QualType T);
1345
1346
  /// Create a metadata identifier that is intended to be used to check virtual
1347
  /// calls via a member function pointer.
1348
  llvm::Metadata *CreateMetadataIdentifierForVirtualMemPtrType(QualType T);
1349
1350
  /// Create a metadata identifier for the generalization of the given type.
1351
  /// This may either be an MDString (for external identifiers) or a distinct
1352
  /// unnamed MDNode (for internal identifiers).
1353
  llvm::Metadata *CreateMetadataIdentifierGeneralized(QualType T);
1354
1355
  /// Create and attach type metadata to the given function.
1356
  void CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
1357
                                          llvm::Function *F);
1358
1359
  /// Returns whether this module needs the "all-vtables" type identifier.
1360
  bool NeedAllVtablesTypeId() const;
1361
1362
  /// Create and attach type metadata for the given vtable.
1363
  void AddVTableTypeMetadata(llvm::GlobalVariable *VTable, CharUnits Offset,
1364
                             const CXXRecordDecl *RD);
1365
1366
  /// Return a vector of most-base classes for RD. This is used to implement
1367
  /// control flow integrity checks for member function pointers.
1368
  ///
1369
  /// A most-base class of a class C is defined as a recursive base class of C,
1370
  /// including C itself, that does not have any bases.
1371
  std::vector<const CXXRecordDecl *>
1372
  getMostBaseClasses(const CXXRecordDecl *RD);
1373
1374
  /// Get the declaration of std::terminate for the platform.
1375
  llvm::FunctionCallee getTerminateFn();
1376
1377
  llvm::SanitizerStatReport &getSanStats();
1378
1379
  llvm::Value *
1380
  createOpenCLIntToSamplerConversion(const Expr *E, CodeGenFunction &CGF);
1381
1382
  /// OpenCL v1.2 s5.6.4.6 allows the compiler to store kernel argument
1383
  /// information in the program executable. The argument information stored
1384
  /// includes the argument name, its type, the address and access qualifiers
1385
  /// used. This helper can be used to generate metadata for source code kernel
1386
  /// function as well as generated implicitly kernels. If a kernel is generated
1387
  /// implicitly null value has to be passed to the last two parameters,
1388
  /// otherwise all parameters must have valid non-null values.
1389
  /// \param FN is a pointer to IR function being generated.
1390
  /// \param FD is a pointer to function declaration if any.
1391
  /// \param CGF is a pointer to CodeGenFunction that generates this function.
1392
  void GenOpenCLArgMetadata(llvm::Function *FN,
1393
                            const FunctionDecl *FD = nullptr,
1394
                            CodeGenFunction *CGF = nullptr);
1395
1396
  /// Get target specific null pointer.
1397
  /// \param T is the LLVM type of the null pointer.
1398
  /// \param QT is the clang QualType of the null pointer.
1399
  llvm::Constant *getNullPointer(llvm::PointerType *T, QualType QT);
1400
1401
  CharUnits getNaturalTypeAlignment(QualType T,
1402
                                    LValueBaseInfo *BaseInfo = nullptr,
1403
                                    TBAAAccessInfo *TBAAInfo = nullptr,
1404
                                    bool forPointeeType = false);
1405
  CharUnits getNaturalPointeeTypeAlignment(QualType T,
1406
                                           LValueBaseInfo *BaseInfo = nullptr,
1407
                                           TBAAAccessInfo *TBAAInfo = nullptr);
1408
  bool stopAutoInit();
1409
1410
private:
1411
  llvm::Constant *GetOrCreateLLVMFunction(
1412
      StringRef MangledName, llvm::Type *Ty, GlobalDecl D, bool ForVTable,
1413
      bool DontDefer = false, bool IsThunk = false,
1414
      llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
1415
      ForDefinition_t IsForDefinition = NotForDefinition);
1416
1417
  llvm::Constant *GetOrCreateMultiVersionResolver(GlobalDecl GD,
1418
                                                  llvm::Type *DeclTy,
1419
                                                  const FunctionDecl *FD);
1420
  void UpdateMultiVersionNames(GlobalDecl GD, const FunctionDecl *FD);
1421
1422
  llvm::Constant *GetOrCreateLLVMGlobal(StringRef MangledName,
1423
                                        llvm::PointerType *PTy,
1424
                                        const VarDecl *D,
1425
                                        ForDefinition_t IsForDefinition
1426
                                          = NotForDefinition);
1427
1428
  bool GetCPUAndFeaturesAttributes(GlobalDecl GD,
1429
                                   llvm::AttrBuilder &AttrBuilder);
1430
  void setNonAliasAttributes(GlobalDecl GD, llvm::GlobalObject *GO);
1431
1432
  /// Set function attributes for a function declaration.
1433
  void SetFunctionAttributes(GlobalDecl GD, llvm::Function *F,
1434
                             bool IsIncompleteFunction, bool IsThunk);
1435
1436
  void EmitGlobalDefinition(GlobalDecl D, llvm::GlobalValue *GV = nullptr);
1437
1438
  void EmitGlobalFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1439
  void EmitMultiVersionFunctionDefinition(GlobalDecl GD, llvm::GlobalValue *GV);
1440
1441
  void EmitGlobalVarDefinition(const VarDecl *D, bool IsTentative = false);
1442
  void EmitExternalVarDeclaration(const VarDecl *D);
1443
  void EmitAliasDefinition(GlobalDecl GD);
1444
  void emitIFuncDefinition(GlobalDecl GD);
1445
  void emitCPUDispatchDefinition(GlobalDecl GD);
1446
  void EmitObjCPropertyImplementations(const ObjCImplementationDecl *D);
1447
  void EmitObjCIvarInitializations(ObjCImplementationDecl *D);
1448
1449
  // C++ related functions.
1450
1451
  void EmitDeclContext(const DeclContext *DC);
1452
  void EmitLinkageSpec(const LinkageSpecDecl *D);
1453
1454
  /// Emit the function that initializes C++ thread_local variables.
1455
  void EmitCXXThreadLocalInitFunc();
1456
1457
  /// Emit the function that initializes C++ globals.
1458
  void EmitCXXGlobalInitFunc();
1459
1460
  /// Emit the function that performs cleanup associated with C++ globals.
1461
  void EmitCXXGlobalCleanUpFunc();
1462
1463
  /// Emit the function that initializes the specified global (if PerformInit is
1464
  /// true) and registers its destructor.
1465
  void EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
1466
                                    llvm::GlobalVariable *Addr,
1467
                                    bool PerformInit);
1468
1469
  void EmitPointerToInitFunc(const VarDecl *VD, llvm::GlobalVariable *Addr,
1470
                             llvm::Function *InitFunc, InitSegAttr *ISA);
1471
1472
  // FIXME: Hardcoding priority here is gross.
1473
  void AddGlobalCtor(llvm::Function *Ctor, int Priority = 65535,
1474
                     llvm::Constant *AssociatedData = nullptr);
1475
  void AddGlobalDtor(llvm::Function *Dtor, int Priority = 65535);
1476
1477
  /// EmitCtorList - Generates a global array of functions and priorities using
1478
  /// the given list and name. This array will have appending linkage and is
1479
  /// suitable for use as a LLVM constructor or destructor array. Clears Fns.
1480
  void EmitCtorList(CtorList &Fns, const char *GlobalName);
1481
1482
  /// Emit any needed decls for which code generation was deferred.
1483
  void EmitDeferred();
1484
1485
  /// Try to emit external vtables as available_externally if they have emitted
1486
  /// all inlined virtual functions.  It runs after EmitDeferred() and therefore
1487
  /// is not allowed to create new references to things that need to be emitted
1488
  /// lazily.
1489
  void EmitVTablesOpportunistically();
1490
1491
  /// Call replaceAllUsesWith on all pairs in Replacements.
1492
  void applyReplacements();
1493
1494
  /// Call replaceAllUsesWith on all pairs in GlobalValReplacements.
1495
  void applyGlobalValReplacements();
1496
1497
  void checkAliases();
1498
1499
  std::map<int, llvm::TinyPtrVector<llvm::Function *>> DtorsUsingAtExit;
1500
1501
  /// Register functions annotated with __attribute__((destructor)) using
1502
  /// __cxa_atexit, if it is available, or atexit otherwise.
1503
  void registerGlobalDtorsWithAtExit();
1504
1505
  void emitMultiVersionFunctions();
1506
1507
  /// Emit any vtables which we deferred and still have a use for.
1508
  void EmitDeferredVTables();
1509
1510
  /// Emit a dummy function that reference a CoreFoundation symbol when
1511
  /// @available is used on Darwin.
1512
  void emitAtAvailableLinkGuard();
1513
1514
  /// Emit the llvm.used and llvm.compiler.used metadata.
1515
  void emitLLVMUsed();
1516
1517
  /// Emit the link options introduced by imported modules.
1518
  void EmitModuleLinkOptions();
1519
1520
  /// Emit aliases for internal-linkage declarations inside "C" language
1521
  /// linkage specifications, giving them the "expected" name where possible.
1522
  void EmitStaticExternCAliases();
1523
1524
  void EmitDeclMetadata();
1525
1526
  /// Emit the Clang version as llvm.ident metadata.
1527
  void EmitVersionIdentMetadata();
1528
1529
  /// Emit the Clang commandline as llvm.commandline metadata.
1530
  void EmitCommandLineMetadata();
1531
1532
  /// Emit the module flag metadata used to pass options controlling the
1533
  /// the backend to LLVM.
1534
  void EmitBackendOptionsMetadata(const CodeGenOptions CodeGenOpts);
1535
1536
  /// Emits OpenCL specific Metadata e.g. OpenCL version.
1537
  void EmitOpenCLMetadata();
1538
1539
  /// Emit the llvm.gcov metadata used to tell LLVM where to emit the .gcno and
1540
  /// .gcda files in a way that persists in .bc files.
1541
  void EmitCoverageFile();
1542
1543
  /// Determine whether the definition must be emitted; if this returns \c
1544
  /// false, the definition can be emitted lazily if it's used.
1545
  bool MustBeEmitted(const ValueDecl *D);
1546
1547
  /// Determine whether the definition can be emitted eagerly, or should be
1548
  /// delayed until the end of the translation unit. This is relevant for
1549
  /// definitions whose linkage can change, e.g. implicit function instantions
1550
  /// which may later be explicitly instantiated.
1551
  bool MayBeEmittedEagerly(const ValueDecl *D);
1552
1553
  /// Check whether we can use a "simpler", more core exceptions personality
1554
  /// function.
1555
  void SimplifyPersonality();
1556
1557
  /// Helper function for ConstructAttributeList and
1558
  /// addDefaultFunctionDefinitionAttributes.  Builds a set of function
1559
  /// attributes to add to a function with the given properties.
1560
  void getDefaultFunctionAttributes(StringRef Name, bool HasOptnone,
1561
                                    bool AttrOnCallSite,
1562
                                    llvm::AttrBuilder &FuncAttrs);
1563
1564
  llvm::Metadata *CreateMetadataIdentifierImpl(QualType T, MetadataTypeMap &Map,
1565
                                               StringRef Suffix);
1566
};
1567
1568
}  // end namespace CodeGen
1569
}  // end namespace clang
1570
1571
#endif // LLVM_CLANG_LIB_CODEGEN_CODEGENMODULE_H