1193326Sed//===-- CodeGenFunction.h - Per-Function state for LLVM CodeGen -*- C++ -*-===// 2193326Sed// 3193326Sed// The LLVM Compiler Infrastructure 4193326Sed// 5193326Sed// This file is distributed under the University of Illinois Open Source 6193326Sed// License. See LICENSE.TXT for details. 7193326Sed// 8193326Sed//===----------------------------------------------------------------------===// 9193326Sed// 10193326Sed// This is the internal per-function state used for llvm translation. 11193326Sed// 12193326Sed//===----------------------------------------------------------------------===// 13193326Sed 14193326Sed#ifndef CLANG_CODEGEN_CODEGENFUNCTION_H 15193326Sed#define CLANG_CODEGEN_CODEGENFUNCTION_H 16193326Sed 17252723Sdim#include "CGBuilder.h" 18252723Sdim#include "CGDebugInfo.h" 19252723Sdim#include "CGValue.h" 20263509Sdim#include "EHScopeStack.h" 21252723Sdim#include "CodeGenModule.h" 22252723Sdim#include "clang/AST/CharUnits.h" 23193326Sed#include "clang/AST/ExprCXX.h" 24193326Sed#include "clang/AST/ExprObjC.h" 25252723Sdim#include "clang/AST/Type.h" 26218893Sdim#include "clang/Basic/ABI.h" 27263509Sdim#include "clang/Basic/CapturedStmt.h" 28193326Sed#include "clang/Basic/TargetInfo.h" 29252723Sdim#include "clang/Frontend/CodeGenOptions.h" 30224145Sdim#include "llvm/ADT/ArrayRef.h" 31193326Sed#include "llvm/ADT/DenseMap.h" 32193326Sed#include "llvm/ADT/SmallVector.h" 33252723Sdim#include "llvm/Support/Debug.h" 34193326Sed#include "llvm/Support/ValueHandle.h" 35193326Sed 36193326Sednamespace llvm { 37193326Sed class BasicBlock; 38198092Srdivacky class LLVMContext; 39207619Srdivacky class MDNode; 40193326Sed class Module; 41193326Sed class SwitchInst; 42198398Srdivacky class Twine; 43193326Sed class Value; 44210299Sed class CallSite; 45193326Sed} 46193326Sed 47193326Sednamespace clang { 48193326Sed class ASTContext; 49235633Sdim class BlockDecl; 50193326Sed class CXXDestructorDecl; 51221345Sdim class CXXForRangeStmt; 52198092Srdivacky class CXXTryStmt; 53193326Sed class Decl; 54218893Sdim class LabelDecl; 55193326Sed class EnumConstantDecl; 56193326Sed class FunctionDecl; 57193326Sed class FunctionProtoType; 58193326Sed class LabelStmt; 59193326Sed class ObjCContainerDecl; 60193326Sed class ObjCInterfaceDecl; 61193326Sed class ObjCIvarDecl; 62193326Sed class ObjCMethodDecl; 63193326Sed class ObjCImplementationDecl; 64193326Sed class ObjCPropertyImplDecl; 65193326Sed class TargetInfo; 66204643Srdivacky class TargetCodeGenInfo; 67193326Sed class VarDecl; 68193326Sed class ObjCForCollectionStmt; 69193326Sed class ObjCAtTryStmt; 70193326Sed class ObjCAtThrowStmt; 71193326Sed class ObjCAtSynchronizedStmt; 72224145Sdim class ObjCAutoreleasePoolStmt; 73193326Sed 74193326Sednamespace CodeGen { 75193326Sed class CodeGenTypes; 76193326Sed class CGFunctionInfo; 77193326Sed class CGRecordLayout; 78208600Srdivacky class CGBlockInfo; 79212904Sdim class CGCXXABI; 80218893Sdim class BlockFlags; 81218893Sdim class BlockFieldFlags; 82193326Sed 83252723Sdim/// The kind of evaluation to perform on values of a particular 84252723Sdim/// type. Basically, is the code in CGExprScalar, CGExprComplex, or 85252723Sdim/// CGExprAgg? 86252723Sdim/// 87252723Sdim/// TODO: should vectors maybe be split out into their own thing? 88252723Sdimenum TypeEvaluationKind { 89252723Sdim TEK_Scalar, 90252723Sdim TEK_Complex, 91252723Sdim TEK_Aggregate 92252723Sdim}; 93252723Sdim 94193326Sed/// CodeGenFunction - This class organizes the per-function state that is used 95193326Sed/// while generating LLVM code. 96218893Sdimclass CodeGenFunction : public CodeGenTypeCache { 97245431Sdim CodeGenFunction(const CodeGenFunction &) LLVM_DELETED_FUNCTION; 98245431Sdim void operator=(const CodeGenFunction &) LLVM_DELETED_FUNCTION; 99212904Sdim 100212904Sdim friend class CGCXXABI; 101193326Sedpublic: 102212904Sdim /// A jump destination is an abstract label, branching to which may 103212904Sdim /// require a jump out through normal cleanups. 104210299Sed struct JumpDest { 105212904Sdim JumpDest() : Block(0), ScopeDepth(), Index(0) {} 106212904Sdim JumpDest(llvm::BasicBlock *Block, 107212904Sdim EHScopeStack::stable_iterator Depth, 108212904Sdim unsigned Index) 109212904Sdim : Block(Block), ScopeDepth(Depth), Index(Index) {} 110212904Sdim 111212904Sdim bool isValid() const { return Block != 0; } 112212904Sdim llvm::BasicBlock *getBlock() const { return Block; } 113212904Sdim EHScopeStack::stable_iterator getScopeDepth() const { return ScopeDepth; } 114212904Sdim unsigned getDestIndex() const { return Index; } 115218893Sdim 116252723Sdim // This should be used cautiously. 117252723Sdim void setScopeDepth(EHScopeStack::stable_iterator depth) { 118252723Sdim ScopeDepth = depth; 119252723Sdim } 120252723Sdim 121212904Sdim private: 122210299Sed llvm::BasicBlock *Block; 123210299Sed EHScopeStack::stable_iterator ScopeDepth; 124212904Sdim unsigned Index; 125210299Sed }; 126210299Sed 127193326Sed CodeGenModule &CGM; // Per-module state. 128199482Srdivacky const TargetInfo &Target; 129193326Sed 130193326Sed typedef std::pair<llvm::Value *, llvm::Value *> ComplexPairTy; 131193326Sed CGBuilderTy Builder; 132193326Sed 133252723Sdim /// CurFuncDecl - Holds the Decl for the current outermost 134252723Sdim /// non-closure context. 135193326Sed const Decl *CurFuncDecl; 136193326Sed /// CurCodeDecl - This is the inner-most code context, which includes blocks. 137193326Sed const Decl *CurCodeDecl; 138193326Sed const CGFunctionInfo *CurFnInfo; 139193326Sed QualType FnRetTy; 140193326Sed llvm::Function *CurFn; 141193326Sed 142200583Srdivacky /// CurGD - The GlobalDecl for the current function being compiled. 143200583Srdivacky GlobalDecl CurGD; 144200583Srdivacky 145224145Sdim /// PrologueCleanupDepth - The cleanup depth enclosing all the 146224145Sdim /// cleanups associated with the parameters. 147224145Sdim EHScopeStack::stable_iterator PrologueCleanupDepth; 148224145Sdim 149193326Sed /// ReturnBlock - Unified return block. 150210299Sed JumpDest ReturnBlock; 151210299Sed 152193326Sed /// ReturnValue - The temporary alloca to hold the return value. This is null 153193326Sed /// iff the function has no return value. 154200583Srdivacky llvm::Value *ReturnValue; 155193326Sed 156193326Sed /// AllocaInsertPoint - This is an instruction in the entry block before which 157193326Sed /// we prefer to insert allocas. 158193326Sed llvm::AssertingVH<llvm::Instruction> AllocaInsertPt; 159193326Sed 160263509Sdim /// \brief API for captured statement code generation. 161263509Sdim class CGCapturedStmtInfo { 162263509Sdim public: 163263509Sdim explicit CGCapturedStmtInfo(const CapturedStmt &S, 164263509Sdim CapturedRegionKind K = CR_Default) 165263509Sdim : Kind(K), ThisValue(0), CXXThisFieldDecl(0) { 166263509Sdim 167263509Sdim RecordDecl::field_iterator Field = 168263509Sdim S.getCapturedRecordDecl()->field_begin(); 169263509Sdim for (CapturedStmt::const_capture_iterator I = S.capture_begin(), 170263509Sdim E = S.capture_end(); 171263509Sdim I != E; ++I, ++Field) { 172263509Sdim if (I->capturesThis()) 173263509Sdim CXXThisFieldDecl = *Field; 174263509Sdim else 175263509Sdim CaptureFields[I->getCapturedVar()] = *Field; 176263509Sdim } 177263509Sdim } 178263509Sdim 179263509Sdim virtual ~CGCapturedStmtInfo(); 180263509Sdim 181263509Sdim CapturedRegionKind getKind() const { return Kind; } 182263509Sdim 183263509Sdim void setContextValue(llvm::Value *V) { ThisValue = V; } 184263509Sdim // \brief Retrieve the value of the context parameter. 185263509Sdim llvm::Value *getContextValue() const { return ThisValue; } 186263509Sdim 187263509Sdim /// \brief Lookup the captured field decl for a variable. 188263509Sdim const FieldDecl *lookup(const VarDecl *VD) const { 189263509Sdim return CaptureFields.lookup(VD); 190263509Sdim } 191263509Sdim 192263509Sdim bool isCXXThisExprCaptured() const { return CXXThisFieldDecl != 0; } 193263509Sdim FieldDecl *getThisFieldDecl() const { return CXXThisFieldDecl; } 194263509Sdim 195263509Sdim /// \brief Emit the captured statement body. 196263509Sdim virtual void EmitBody(CodeGenFunction &CGF, Stmt *S) { 197263509Sdim CGF.EmitStmt(S); 198263509Sdim } 199263509Sdim 200263509Sdim /// \brief Get the name of the capture helper. 201263509Sdim virtual StringRef getHelperName() const { return "__captured_stmt"; } 202263509Sdim 203263509Sdim private: 204263509Sdim /// \brief The kind of captured statement being generated. 205263509Sdim CapturedRegionKind Kind; 206263509Sdim 207263509Sdim /// \brief Keep the map between VarDecl and FieldDecl. 208263509Sdim llvm::SmallDenseMap<const VarDecl *, FieldDecl *> CaptureFields; 209263509Sdim 210263509Sdim /// \brief The base address of the captured record, passed in as the first 211263509Sdim /// argument of the parallel region function. 212263509Sdim llvm::Value *ThisValue; 213263509Sdim 214263509Sdim /// \brief Captured 'this' type. 215263509Sdim FieldDecl *CXXThisFieldDecl; 216263509Sdim }; 217263509Sdim CGCapturedStmtInfo *CapturedStmtInfo; 218263509Sdim 219245431Sdim /// BoundsChecking - Emit run-time bounds checks. Higher values mean 220245431Sdim /// potentially higher performance penalties. 221245431Sdim unsigned char BoundsChecking; 222193326Sed 223245431Sdim /// \brief Whether any type-checking sanitizers are enabled. If \c false, 224245431Sdim /// calls to EmitTypeCheck can be skipped. 225245431Sdim bool SanitizePerformTypeCheck; 226245431Sdim 227252723Sdim /// \brief Sanitizer options to use for this function. 228252723Sdim const SanitizerOptions *SanOpts; 229252723Sdim 230224145Sdim /// In ARC, whether we should autorelease the return value. 231224145Sdim bool AutoreleaseResult; 232224145Sdim 233218893Sdim const CodeGen::CGBlockInfo *BlockInfo; 234218893Sdim llvm::Value *BlockPointer; 235218893Sdim 236235633Sdim llvm::DenseMap<const VarDecl *, FieldDecl *> LambdaCaptureFields; 237235633Sdim FieldDecl *LambdaThisCaptureField; 238235633Sdim 239208600Srdivacky /// \brief A mapping from NRVO variables to the flags used to indicate 240208600Srdivacky /// when the NRVO has been applied to this variable. 241208600Srdivacky llvm::DenseMap<const VarDecl *, llvm::Value *> NRVOFlags; 242193326Sed 243210299Sed EHScopeStack EHStack; 244263509Sdim llvm::SmallVector<char, 256> LifetimeExtendedCleanupStack; 245193326Sed 246263509Sdim /// Header for data within LifetimeExtendedCleanupStack. 247263509Sdim struct LifetimeExtendedCleanupHeader { 248263509Sdim /// The size of the following cleanup object. 249263509Sdim size_t Size : 29; 250263509Sdim /// The kind of cleanup to push: a value from the CleanupKind enumeration. 251263509Sdim unsigned Kind : 3; 252263509Sdim 253263509Sdim size_t getSize() const { return Size; } 254263509Sdim CleanupKind getKind() const { return static_cast<CleanupKind>(Kind); } 255263509Sdim }; 256263509Sdim 257212904Sdim /// i32s containing the indexes of the cleanup destinations. 258212904Sdim llvm::AllocaInst *NormalCleanupDest; 259212904Sdim 260212904Sdim unsigned NextCleanupDestIndex; 261212904Sdim 262235633Sdim /// FirstBlockInfo - The head of a singly-linked-list of block layouts. 263235633Sdim CGBlockInfo *FirstBlockInfo; 264235633Sdim 265226890Sdim /// EHResumeBlock - Unified block containing a call to llvm.eh.resume. 266226890Sdim llvm::BasicBlock *EHResumeBlock; 267226890Sdim 268226890Sdim /// The exception slot. All landing pads write the current exception pointer 269226890Sdim /// into this alloca. 270210299Sed llvm::Value *ExceptionSlot; 271193326Sed 272226890Sdim /// The selector slot. Under the MandatoryCleanup model, all landing pads 273226890Sdim /// write the current selector value into this alloca. 274223017Sdim llvm::AllocaInst *EHSelectorSlot; 275223017Sdim 276210299Sed /// Emits a landing pad for the current EH stack. 277210299Sed llvm::BasicBlock *EmitLandingPad(); 278193326Sed 279210299Sed llvm::BasicBlock *getInvokeDestImpl(); 280193326Sed 281218893Sdim template <class T> 282218893Sdim typename DominatingValue<T>::saved_type saveValueInCond(T value) { 283218893Sdim return DominatingValue<T>::save(*this, value); 284218893Sdim } 285218893Sdim 286210299Sedpublic: 287210299Sed /// ObjCEHValueStack - Stack of Objective-C exception values, used for 288210299Sed /// rethrows. 289226890Sdim SmallVector<llvm::Value*, 8> ObjCEHValueStack; 290200583Srdivacky 291224145Sdim /// A class controlling the emission of a finally block. 292224145Sdim class FinallyInfo { 293224145Sdim /// Where the catchall's edge through the cleanup should go. 294224145Sdim JumpDest RethrowDest; 295224145Sdim 296224145Sdim /// A function to call to enter the catch. 297224145Sdim llvm::Constant *BeginCatchFn; 298224145Sdim 299224145Sdim /// An i1 variable indicating whether or not the @finally is 300224145Sdim /// running for an exception. 301224145Sdim llvm::AllocaInst *ForEHVar; 302224145Sdim 303224145Sdim /// An i8* variable into which the exception pointer to rethrow 304224145Sdim /// has been saved. 305224145Sdim llvm::AllocaInst *SavedExnVar; 306224145Sdim 307224145Sdim public: 308224145Sdim void enter(CodeGenFunction &CGF, const Stmt *Finally, 309224145Sdim llvm::Constant *beginCatchFn, llvm::Constant *endCatchFn, 310224145Sdim llvm::Constant *rethrowFn); 311224145Sdim void exit(CodeGenFunction &CGF); 312193326Sed }; 313193326Sed 314218893Sdim /// pushFullExprCleanup - Push a cleanup to be run at the end of the 315218893Sdim /// current full-expression. Safe against the possibility that 316218893Sdim /// we're currently inside a conditionally-evaluated expression. 317218893Sdim template <class T, class A0> 318218893Sdim void pushFullExprCleanup(CleanupKind kind, A0 a0) { 319218893Sdim // If we're not in a conditional branch, or if none of the 320218893Sdim // arguments requires saving, then use the unconditional cleanup. 321224145Sdim if (!isInConditionalBranch()) 322224145Sdim return EHStack.pushCleanup<T>(kind, a0); 323218893Sdim 324218893Sdim typename DominatingValue<A0>::saved_type a0_saved = saveValueInCond(a0); 325218893Sdim 326218893Sdim typedef EHScopeStack::ConditionalCleanup1<T, A0> CleanupType; 327218893Sdim EHStack.pushCleanup<CleanupType>(kind, a0_saved); 328218893Sdim initFullExprCleanup(); 329218893Sdim } 330218893Sdim 331218893Sdim /// pushFullExprCleanup - Push a cleanup to be run at the end of the 332218893Sdim /// current full-expression. Safe against the possibility that 333218893Sdim /// we're currently inside a conditionally-evaluated expression. 334218893Sdim template <class T, class A0, class A1> 335218893Sdim void pushFullExprCleanup(CleanupKind kind, A0 a0, A1 a1) { 336218893Sdim // If we're not in a conditional branch, or if none of the 337218893Sdim // arguments requires saving, then use the unconditional cleanup. 338224145Sdim if (!isInConditionalBranch()) 339224145Sdim return EHStack.pushCleanup<T>(kind, a0, a1); 340218893Sdim 341218893Sdim typename DominatingValue<A0>::saved_type a0_saved = saveValueInCond(a0); 342218893Sdim typename DominatingValue<A1>::saved_type a1_saved = saveValueInCond(a1); 343218893Sdim 344218893Sdim typedef EHScopeStack::ConditionalCleanup2<T, A0, A1> CleanupType; 345218893Sdim EHStack.pushCleanup<CleanupType>(kind, a0_saved, a1_saved); 346218893Sdim initFullExprCleanup(); 347218893Sdim } 348218893Sdim 349224145Sdim /// pushFullExprCleanup - Push a cleanup to be run at the end of the 350224145Sdim /// current full-expression. Safe against the possibility that 351224145Sdim /// we're currently inside a conditionally-evaluated expression. 352224145Sdim template <class T, class A0, class A1, class A2> 353224145Sdim void pushFullExprCleanup(CleanupKind kind, A0 a0, A1 a1, A2 a2) { 354224145Sdim // If we're not in a conditional branch, or if none of the 355224145Sdim // arguments requires saving, then use the unconditional cleanup. 356224145Sdim if (!isInConditionalBranch()) { 357224145Sdim return EHStack.pushCleanup<T>(kind, a0, a1, a2); 358224145Sdim } 359224145Sdim 360224145Sdim typename DominatingValue<A0>::saved_type a0_saved = saveValueInCond(a0); 361224145Sdim typename DominatingValue<A1>::saved_type a1_saved = saveValueInCond(a1); 362224145Sdim typename DominatingValue<A2>::saved_type a2_saved = saveValueInCond(a2); 363224145Sdim 364224145Sdim typedef EHScopeStack::ConditionalCleanup3<T, A0, A1, A2> CleanupType; 365224145Sdim EHStack.pushCleanup<CleanupType>(kind, a0_saved, a1_saved, a2_saved); 366224145Sdim initFullExprCleanup(); 367224145Sdim } 368224145Sdim 369224145Sdim /// pushFullExprCleanup - Push a cleanup to be run at the end of the 370224145Sdim /// current full-expression. Safe against the possibility that 371224145Sdim /// we're currently inside a conditionally-evaluated expression. 372224145Sdim template <class T, class A0, class A1, class A2, class A3> 373224145Sdim void pushFullExprCleanup(CleanupKind kind, A0 a0, A1 a1, A2 a2, A3 a3) { 374224145Sdim // If we're not in a conditional branch, or if none of the 375224145Sdim // arguments requires saving, then use the unconditional cleanup. 376224145Sdim if (!isInConditionalBranch()) { 377224145Sdim return EHStack.pushCleanup<T>(kind, a0, a1, a2, a3); 378224145Sdim } 379224145Sdim 380224145Sdim typename DominatingValue<A0>::saved_type a0_saved = saveValueInCond(a0); 381224145Sdim typename DominatingValue<A1>::saved_type a1_saved = saveValueInCond(a1); 382224145Sdim typename DominatingValue<A2>::saved_type a2_saved = saveValueInCond(a2); 383224145Sdim typename DominatingValue<A3>::saved_type a3_saved = saveValueInCond(a3); 384224145Sdim 385224145Sdim typedef EHScopeStack::ConditionalCleanup4<T, A0, A1, A2, A3> CleanupType; 386224145Sdim EHStack.pushCleanup<CleanupType>(kind, a0_saved, a1_saved, 387224145Sdim a2_saved, a3_saved); 388224145Sdim initFullExprCleanup(); 389224145Sdim } 390224145Sdim 391263509Sdim /// \brief Queue a cleanup to be pushed after finishing the current 392263509Sdim /// full-expression. 393263509Sdim template <class T, class A0, class A1, class A2, class A3> 394263509Sdim void pushCleanupAfterFullExpr(CleanupKind Kind, A0 a0, A1 a1, A2 a2, A3 a3) { 395263509Sdim assert(!isInConditionalBranch() && "can't defer conditional cleanup"); 396263509Sdim 397263509Sdim LifetimeExtendedCleanupHeader Header = { sizeof(T), Kind }; 398263509Sdim 399263509Sdim size_t OldSize = LifetimeExtendedCleanupStack.size(); 400263509Sdim LifetimeExtendedCleanupStack.resize( 401263509Sdim LifetimeExtendedCleanupStack.size() + sizeof(Header) + Header.Size); 402263509Sdim 403263509Sdim char *Buffer = &LifetimeExtendedCleanupStack[OldSize]; 404263509Sdim new (Buffer) LifetimeExtendedCleanupHeader(Header); 405263509Sdim new (Buffer + sizeof(Header)) T(a0, a1, a2, a3); 406263509Sdim } 407263509Sdim 408235633Sdim /// Set up the last cleaup that was pushed as a conditional 409235633Sdim /// full-expression cleanup. 410235633Sdim void initFullExprCleanup(); 411235633Sdim 412210299Sed /// PushDestructorCleanup - Push a cleanup to call the 413210299Sed /// complete-object destructor of an object of the given type at the 414210299Sed /// given address. Does nothing if T is not a C++ class type with a 415210299Sed /// non-trivial destructor. 416210299Sed void PushDestructorCleanup(QualType T, llvm::Value *Addr); 417193326Sed 418212904Sdim /// PushDestructorCleanup - Push a cleanup to call the 419212904Sdim /// complete-object variant of the given destructor on the object at 420212904Sdim /// the given address. 421212904Sdim void PushDestructorCleanup(const CXXDestructorDecl *Dtor, 422212904Sdim llvm::Value *Addr); 423212904Sdim 424210299Sed /// PopCleanupBlock - Will pop the cleanup entry on the stack and 425210299Sed /// process all branch fixups. 426263509Sdim void PopCleanupBlock(bool FallThroughIsBranchThrough = false); 427210299Sed 428218893Sdim /// DeactivateCleanupBlock - Deactivates the given cleanup block. 429218893Sdim /// The block cannot be reactivated. Pops it if it's the top of the 430218893Sdim /// stack. 431235633Sdim /// 432235633Sdim /// \param DominatingIP - An instruction which is known to 433235633Sdim /// dominate the current IP (if set) and which lies along 434235633Sdim /// all paths of execution between the current IP and the 435235633Sdim /// the point at which the cleanup comes into scope. 436235633Sdim void DeactivateCleanupBlock(EHScopeStack::stable_iterator Cleanup, 437235633Sdim llvm::Instruction *DominatingIP); 438193326Sed 439218893Sdim /// ActivateCleanupBlock - Activates an initially-inactive cleanup. 440218893Sdim /// Cannot be used to resurrect a deactivated cleanup. 441235633Sdim /// 442235633Sdim /// \param DominatingIP - An instruction which is known to 443235633Sdim /// dominate the current IP (if set) and which lies along 444235633Sdim /// all paths of execution between the current IP and the 445235633Sdim /// the point at which the cleanup comes into scope. 446235633Sdim void ActivateCleanupBlock(EHScopeStack::stable_iterator Cleanup, 447235633Sdim llvm::Instruction *DominatingIP); 448218893Sdim 449210299Sed /// \brief Enters a new scope for capturing cleanups, all of which 450210299Sed /// will be executed once the scope is exited. 451210299Sed class RunCleanupsScope { 452210299Sed EHScopeStack::stable_iterator CleanupStackDepth; 453263509Sdim size_t LifetimeExtendedCleanupStackSize; 454199990Srdivacky bool OldDidCallStackSave; 455252723Sdim protected: 456199990Srdivacky bool PerformCleanup; 457252723Sdim private: 458199990Srdivacky 459245431Sdim RunCleanupsScope(const RunCleanupsScope &) LLVM_DELETED_FUNCTION; 460245431Sdim void operator=(const RunCleanupsScope &) LLVM_DELETED_FUNCTION; 461199990Srdivacky 462235633Sdim protected: 463235633Sdim CodeGenFunction& CGF; 464252723Sdim 465199990Srdivacky public: 466199990Srdivacky /// \brief Enter a new cleanup scope. 467218893Sdim explicit RunCleanupsScope(CodeGenFunction &CGF) 468235633Sdim : PerformCleanup(true), CGF(CGF) 469199990Srdivacky { 470210299Sed CleanupStackDepth = CGF.EHStack.stable_begin(); 471263509Sdim LifetimeExtendedCleanupStackSize = 472263509Sdim CGF.LifetimeExtendedCleanupStack.size(); 473199990Srdivacky OldDidCallStackSave = CGF.DidCallStackSave; 474218893Sdim CGF.DidCallStackSave = false; 475199990Srdivacky } 476199990Srdivacky 477199990Srdivacky /// \brief Exit this cleanup scope, emitting any accumulated 478199990Srdivacky /// cleanups. 479210299Sed ~RunCleanupsScope() { 480199990Srdivacky if (PerformCleanup) { 481199990Srdivacky CGF.DidCallStackSave = OldDidCallStackSave; 482263509Sdim CGF.PopCleanupBlocks(CleanupStackDepth, 483263509Sdim LifetimeExtendedCleanupStackSize); 484199990Srdivacky } 485199990Srdivacky } 486199990Srdivacky 487199990Srdivacky /// \brief Determine whether this scope requires any cleanups. 488199990Srdivacky bool requiresCleanups() const { 489210299Sed return CGF.EHStack.stable_begin() != CleanupStackDepth; 490199990Srdivacky } 491199990Srdivacky 492199990Srdivacky /// \brief Force the emission of cleanups now, instead of waiting 493199990Srdivacky /// until this object is destroyed. 494199990Srdivacky void ForceCleanup() { 495199990Srdivacky assert(PerformCleanup && "Already forced cleanup"); 496199990Srdivacky CGF.DidCallStackSave = OldDidCallStackSave; 497263509Sdim CGF.PopCleanupBlocks(CleanupStackDepth, 498263509Sdim LifetimeExtendedCleanupStackSize); 499199990Srdivacky PerformCleanup = false; 500199990Srdivacky } 501199990Srdivacky }; 502199990Srdivacky 503235633Sdim class LexicalScope: protected RunCleanupsScope { 504235633Sdim SourceRange Range; 505252723Sdim SmallVector<const LabelDecl*, 4> Labels; 506252723Sdim LexicalScope *ParentScope; 507206084Srdivacky 508245431Sdim LexicalScope(const LexicalScope &) LLVM_DELETED_FUNCTION; 509245431Sdim void operator=(const LexicalScope &) LLVM_DELETED_FUNCTION; 510235633Sdim 511235633Sdim public: 512235633Sdim /// \brief Enter a new cleanup scope. 513235633Sdim explicit LexicalScope(CodeGenFunction &CGF, SourceRange Range) 514252723Sdim : RunCleanupsScope(CGF), Range(Range), ParentScope(CGF.CurLexicalScope) { 515252723Sdim CGF.CurLexicalScope = this; 516235633Sdim if (CGDebugInfo *DI = CGF.getDebugInfo()) 517235633Sdim DI->EmitLexicalBlockStart(CGF.Builder, Range.getBegin()); 518235633Sdim } 519235633Sdim 520252723Sdim void addLabel(const LabelDecl *label) { 521252723Sdim assert(PerformCleanup && "adding label to dead scope?"); 522252723Sdim Labels.push_back(label); 523252723Sdim } 524252723Sdim 525235633Sdim /// \brief Exit this cleanup scope, emitting any accumulated 526235633Sdim /// cleanups. 527235633Sdim ~LexicalScope() { 528252723Sdim if (CGDebugInfo *DI = CGF.getDebugInfo()) 529252723Sdim DI->EmitLexicalBlockEnd(CGF.Builder, Range.getEnd()); 530252723Sdim 531252723Sdim // If we should perform a cleanup, force them now. Note that 532252723Sdim // this ends the cleanup scope before rescoping any labels. 533252723Sdim if (PerformCleanup) ForceCleanup(); 534235633Sdim } 535235633Sdim 536235633Sdim /// \brief Force the emission of cleanups now, instead of waiting 537235633Sdim /// until this object is destroyed. 538235633Sdim void ForceCleanup() { 539252723Sdim CGF.CurLexicalScope = ParentScope; 540235633Sdim RunCleanupsScope::ForceCleanup(); 541252723Sdim 542252723Sdim if (!Labels.empty()) 543252723Sdim rescopeLabels(); 544235633Sdim } 545252723Sdim 546252723Sdim void rescopeLabels(); 547235633Sdim }; 548235633Sdim 549235633Sdim 550263509Sdim /// \brief Takes the old cleanup stack size and emits the cleanup blocks 551263509Sdim /// that have been added. 552263509Sdim void PopCleanupBlocks(EHScopeStack::stable_iterator OldCleanupStackSize); 553263509Sdim 554263509Sdim /// \brief Takes the old cleanup stack size and emits the cleanup blocks 555263509Sdim /// that have been added, then adds all lifetime-extended cleanups from 556263509Sdim /// the given position to the stack. 557252723Sdim void PopCleanupBlocks(EHScopeStack::stable_iterator OldCleanupStackSize, 558263509Sdim size_t OldLifetimeExtendedStackSize); 559206084Srdivacky 560212904Sdim void ResolveBranchFixups(llvm::BasicBlock *Target); 561212904Sdim 562210299Sed /// The given basic block lies in the current EH scope, but may be a 563210299Sed /// target of a potentially scope-crossing jump; get a stable handle 564210299Sed /// to which we can perform this jump later. 565212904Sdim JumpDest getJumpDestInCurrentScope(llvm::BasicBlock *Target) { 566212904Sdim return JumpDest(Target, 567212904Sdim EHStack.getInnermostNormalCleanup(), 568212904Sdim NextCleanupDestIndex++); 569210299Sed } 570193326Sed 571210299Sed /// The given basic block lies in the current EH scope, but may be a 572210299Sed /// target of a potentially scope-crossing jump; get a stable handle 573210299Sed /// to which we can perform this jump later. 574226890Sdim JumpDest getJumpDestInCurrentScope(StringRef Name = StringRef()) { 575212904Sdim return getJumpDestInCurrentScope(createBasicBlock(Name)); 576210299Sed } 577193326Sed 578210299Sed /// EmitBranchThroughCleanup - Emit a branch from the current insert 579210299Sed /// block through the normal cleanup handling code (if any) and then 580210299Sed /// on to \arg Dest. 581210299Sed void EmitBranchThroughCleanup(JumpDest Dest); 582221345Sdim 583221345Sdim /// isObviouslyBranchWithoutCleanups - Return true if a branch to the 584221345Sdim /// specified destination obviously has no cleanups to run. 'false' is always 585221345Sdim /// a conservatively correct answer for this method. 586221345Sdim bool isObviouslyBranchWithoutCleanups(JumpDest Dest) const; 587210299Sed 588226890Sdim /// popCatchScope - Pops the catch scope at the top of the EHScope 589226890Sdim /// stack, emitting any required code (other than the catch handlers 590226890Sdim /// themselves). 591226890Sdim void popCatchScope(); 592210299Sed 593245431Sdim llvm::BasicBlock *getEHResumeBlock(bool isCleanup); 594226890Sdim llvm::BasicBlock *getEHDispatchBlock(EHScopeStack::stable_iterator scope); 595212904Sdim 596218893Sdim /// An object to manage conditionally-evaluated expressions. 597218893Sdim class ConditionalEvaluation { 598218893Sdim llvm::BasicBlock *StartBB; 599198092Srdivacky 600218893Sdim public: 601218893Sdim ConditionalEvaluation(CodeGenFunction &CGF) 602218893Sdim : StartBB(CGF.Builder.GetInsertBlock()) {} 603198092Srdivacky 604218893Sdim void begin(CodeGenFunction &CGF) { 605218893Sdim assert(CGF.OutermostConditional != this); 606218893Sdim if (!CGF.OutermostConditional) 607218893Sdim CGF.OutermostConditional = this; 608218893Sdim } 609218893Sdim 610218893Sdim void end(CodeGenFunction &CGF) { 611218893Sdim assert(CGF.OutermostConditional != 0); 612218893Sdim if (CGF.OutermostConditional == this) 613218893Sdim CGF.OutermostConditional = 0; 614218893Sdim } 615218893Sdim 616218893Sdim /// Returns a block which will be executed prior to each 617218893Sdim /// evaluation of the conditional code. 618218893Sdim llvm::BasicBlock *getStartingBlock() const { 619218893Sdim return StartBB; 620218893Sdim } 621218893Sdim }; 622218893Sdim 623218893Sdim /// isInConditionalBranch - Return true if we're currently emitting 624218893Sdim /// one branch or the other of a conditional expression. 625218893Sdim bool isInConditionalBranch() const { return OutermostConditional != 0; } 626218893Sdim 627235633Sdim void setBeforeOutermostConditional(llvm::Value *value, llvm::Value *addr) { 628235633Sdim assert(isInConditionalBranch()); 629235633Sdim llvm::BasicBlock *block = OutermostConditional->getStartingBlock(); 630235633Sdim new llvm::StoreInst(value, addr, &block->back()); 631235633Sdim } 632235633Sdim 633218893Sdim /// An RAII object to record that we're evaluating a statement 634218893Sdim /// expression. 635218893Sdim class StmtExprEvaluation { 636218893Sdim CodeGenFunction &CGF; 637218893Sdim 638218893Sdim /// We have to save the outermost conditional: cleanups in a 639218893Sdim /// statement expression aren't conditional just because the 640218893Sdim /// StmtExpr is. 641218893Sdim ConditionalEvaluation *SavedOutermostConditional; 642218893Sdim 643218893Sdim public: 644218893Sdim StmtExprEvaluation(CodeGenFunction &CGF) 645218893Sdim : CGF(CGF), SavedOutermostConditional(CGF.OutermostConditional) { 646218893Sdim CGF.OutermostConditional = 0; 647218893Sdim } 648218893Sdim 649218893Sdim ~StmtExprEvaluation() { 650218893Sdim CGF.OutermostConditional = SavedOutermostConditional; 651218893Sdim CGF.EnsureInsertPoint(); 652218893Sdim } 653218893Sdim }; 654218893Sdim 655218893Sdim /// An object which temporarily prevents a value from being 656218893Sdim /// destroyed by aggressive peephole optimizations that assume that 657218893Sdim /// all uses of a value have been realized in the IR. 658218893Sdim class PeepholeProtection { 659218893Sdim llvm::Instruction *Inst; 660218893Sdim friend class CodeGenFunction; 661218893Sdim 662218893Sdim public: 663218893Sdim PeepholeProtection() : Inst(0) {} 664235633Sdim }; 665218893Sdim 666235633Sdim /// A non-RAII class containing all the information about a bound 667235633Sdim /// opaque value. OpaqueValueMapping, below, is a RAII wrapper for 668235633Sdim /// this which makes individual mappings very simple; using this 669235633Sdim /// class directly is useful when you have a variable number of 670235633Sdim /// opaque values or don't want the RAII functionality for some 671235633Sdim /// reason. 672235633Sdim class OpaqueValueMappingData { 673218893Sdim const OpaqueValueExpr *OpaqueValue; 674218893Sdim bool BoundLValue; 675218893Sdim CodeGenFunction::PeepholeProtection Protection; 676218893Sdim 677235633Sdim OpaqueValueMappingData(const OpaqueValueExpr *ov, 678235633Sdim bool boundLValue) 679235633Sdim : OpaqueValue(ov), BoundLValue(boundLValue) {} 680218893Sdim public: 681235633Sdim OpaqueValueMappingData() : OpaqueValue(0) {} 682235633Sdim 683218893Sdim static bool shouldBindAsLValue(const Expr *expr) { 684235633Sdim // gl-values should be bound as l-values for obvious reasons. 685235633Sdim // Records should be bound as l-values because IR generation 686235633Sdim // always keeps them in memory. Expressions of function type 687235633Sdim // act exactly like l-values but are formally required to be 688235633Sdim // r-values in C. 689235633Sdim return expr->isGLValue() || 690235633Sdim expr->getType()->isRecordType() || 691235633Sdim expr->getType()->isFunctionType(); 692218893Sdim } 693218893Sdim 694235633Sdim static OpaqueValueMappingData bind(CodeGenFunction &CGF, 695235633Sdim const OpaqueValueExpr *ov, 696235633Sdim const Expr *e) { 697235633Sdim if (shouldBindAsLValue(ov)) 698235633Sdim return bind(CGF, ov, CGF.EmitLValue(e)); 699235633Sdim return bind(CGF, ov, CGF.EmitAnyExpr(e)); 700235633Sdim } 701235633Sdim 702235633Sdim static OpaqueValueMappingData bind(CodeGenFunction &CGF, 703235633Sdim const OpaqueValueExpr *ov, 704235633Sdim const LValue &lv) { 705235633Sdim assert(shouldBindAsLValue(ov)); 706235633Sdim CGF.OpaqueLValues.insert(std::make_pair(ov, lv)); 707235633Sdim return OpaqueValueMappingData(ov, true); 708235633Sdim } 709235633Sdim 710235633Sdim static OpaqueValueMappingData bind(CodeGenFunction &CGF, 711235633Sdim const OpaqueValueExpr *ov, 712235633Sdim const RValue &rv) { 713235633Sdim assert(!shouldBindAsLValue(ov)); 714235633Sdim CGF.OpaqueRValues.insert(std::make_pair(ov, rv)); 715235633Sdim 716235633Sdim OpaqueValueMappingData data(ov, false); 717235633Sdim 718235633Sdim // Work around an extremely aggressive peephole optimization in 719235633Sdim // EmitScalarConversion which assumes that all other uses of a 720235633Sdim // value are extant. 721235633Sdim data.Protection = CGF.protectFromPeepholes(rv); 722235633Sdim 723235633Sdim return data; 724235633Sdim } 725235633Sdim 726235633Sdim bool isValid() const { return OpaqueValue != 0; } 727235633Sdim void clear() { OpaqueValue = 0; } 728235633Sdim 729235633Sdim void unbind(CodeGenFunction &CGF) { 730235633Sdim assert(OpaqueValue && "no data to unbind!"); 731235633Sdim 732235633Sdim if (BoundLValue) { 733235633Sdim CGF.OpaqueLValues.erase(OpaqueValue); 734235633Sdim } else { 735235633Sdim CGF.OpaqueRValues.erase(OpaqueValue); 736235633Sdim CGF.unprotectFromPeepholes(Protection); 737235633Sdim } 738235633Sdim } 739235633Sdim }; 740235633Sdim 741235633Sdim /// An RAII object to set (and then clear) a mapping for an OpaqueValueExpr. 742235633Sdim class OpaqueValueMapping { 743235633Sdim CodeGenFunction &CGF; 744235633Sdim OpaqueValueMappingData Data; 745235633Sdim 746235633Sdim public: 747235633Sdim static bool shouldBindAsLValue(const Expr *expr) { 748235633Sdim return OpaqueValueMappingData::shouldBindAsLValue(expr); 749235633Sdim } 750235633Sdim 751218893Sdim /// Build the opaque value mapping for the given conditional 752218893Sdim /// operator if it's the GNU ?: extension. This is a common 753218893Sdim /// enough pattern that the convenience operator is really 754218893Sdim /// helpful. 755218893Sdim /// 756218893Sdim OpaqueValueMapping(CodeGenFunction &CGF, 757218893Sdim const AbstractConditionalOperator *op) : CGF(CGF) { 758235633Sdim if (isa<ConditionalOperator>(op)) 759235633Sdim // Leave Data empty. 760218893Sdim return; 761218893Sdim 762218893Sdim const BinaryConditionalOperator *e = cast<BinaryConditionalOperator>(op); 763235633Sdim Data = OpaqueValueMappingData::bind(CGF, e->getOpaqueValue(), 764235633Sdim e->getCommon()); 765218893Sdim } 766218893Sdim 767218893Sdim OpaqueValueMapping(CodeGenFunction &CGF, 768218893Sdim const OpaqueValueExpr *opaqueValue, 769218893Sdim LValue lvalue) 770235633Sdim : CGF(CGF), Data(OpaqueValueMappingData::bind(CGF, opaqueValue, lvalue)) { 771218893Sdim } 772218893Sdim 773218893Sdim OpaqueValueMapping(CodeGenFunction &CGF, 774218893Sdim const OpaqueValueExpr *opaqueValue, 775218893Sdim RValue rvalue) 776235633Sdim : CGF(CGF), Data(OpaqueValueMappingData::bind(CGF, opaqueValue, rvalue)) { 777218893Sdim } 778218893Sdim 779218893Sdim void pop() { 780235633Sdim Data.unbind(CGF); 781235633Sdim Data.clear(); 782218893Sdim } 783218893Sdim 784218893Sdim ~OpaqueValueMapping() { 785235633Sdim if (Data.isValid()) Data.unbind(CGF); 786218893Sdim } 787218893Sdim }; 788218893Sdim 789218893Sdim /// getByrefValueFieldNumber - Given a declaration, returns the LLVM field 790218893Sdim /// number that holds the value. 791218893Sdim unsigned getByRefValueLLVMField(const ValueDecl *VD) const; 792218893Sdim 793218893Sdim /// BuildBlockByrefAddress - Computes address location of the 794218893Sdim /// variable which is declared as __block. 795218893Sdim llvm::Value *BuildBlockByrefAddress(llvm::Value *BaseAddr, 796218893Sdim const VarDecl *V); 797193326Sedprivate: 798198893Srdivacky CGDebugInfo *DebugInfo; 799221345Sdim bool DisableDebugInfo; 800193326Sed 801223017Sdim /// DidCallStackSave - Whether llvm.stacksave has been called. Used to avoid 802223017Sdim /// calling llvm.stacksave for multiple VLAs in the same scope. 803223017Sdim bool DidCallStackSave; 804223017Sdim 805199990Srdivacky /// IndirectBranch - The first time an indirect goto is seen we create a block 806199990Srdivacky /// with an indirect branch. Every time we see the address of a label taken, 807199990Srdivacky /// we add the label to the indirect goto. Every subsequent indirect goto is 808199990Srdivacky /// codegen'd as a jump to the IndirectBranch's basic block. 809198893Srdivacky llvm::IndirectBrInst *IndirectBranch; 810193326Sed 811193326Sed /// LocalDeclMap - This keeps track of the LLVM allocas or globals for local C 812193326Sed /// decls. 813218893Sdim typedef llvm::DenseMap<const Decl*, llvm::Value*> DeclMapTy; 814218893Sdim DeclMapTy LocalDeclMap; 815193326Sed 816193326Sed /// LabelMap - This keeps track of the LLVM basic block for each C label. 817218893Sdim llvm::DenseMap<const LabelDecl*, JumpDest> LabelMap; 818193326Sed 819193326Sed // BreakContinueStack - This keeps track of where break and continue 820193326Sed // statements should jump to. 821193326Sed struct BreakContinue { 822210299Sed BreakContinue(JumpDest Break, JumpDest Continue) 823210299Sed : BreakBlock(Break), ContinueBlock(Continue) {} 824193326Sed 825210299Sed JumpDest BreakBlock; 826210299Sed JumpDest ContinueBlock; 827193326Sed }; 828226890Sdim SmallVector<BreakContinue, 8> BreakContinueStack; 829193326Sed 830235633Sdim /// SwitchInsn - This is nearest current switch instruction. It is null if 831193326Sed /// current context is not in a switch. 832193326Sed llvm::SwitchInst *SwitchInsn; 833193326Sed 834193326Sed /// CaseRangeBlock - This block holds if condition check for last case 835193326Sed /// statement range in current switch instruction. 836193326Sed llvm::BasicBlock *CaseRangeBlock; 837193326Sed 838218893Sdim /// OpaqueLValues - Keeps track of the current set of opaque value 839218893Sdim /// expressions. 840218893Sdim llvm::DenseMap<const OpaqueValueExpr *, LValue> OpaqueLValues; 841218893Sdim llvm::DenseMap<const OpaqueValueExpr *, RValue> OpaqueRValues; 842218893Sdim 843193326Sed // VLASizeMap - This keeps track of the associated size for each VLA type. 844198092Srdivacky // We track this by the size expression rather than the type itself because 845198092Srdivacky // in certain situations, like a const qualifier applied to an VLA typedef, 846198092Srdivacky // multiple VLA types can share the same size expression. 847193326Sed // FIXME: Maybe this could be a stack of maps that is pushed/popped as we 848193326Sed // enter/leave scopes. 849198092Srdivacky llvm::DenseMap<const Expr*, llvm::Value*> VLASizeMap; 850193326Sed 851210299Sed /// A block containing a single 'unreachable' instruction. Created 852210299Sed /// lazily by getUnreachableBlock(). 853210299Sed llvm::BasicBlock *UnreachableBlock; 854193326Sed 855252723Sdim /// Counts of the number return expressions in the function. 856252723Sdim unsigned NumReturnExprs; 857252723Sdim 858252723Sdim /// Count the number of simple (constant) return expressions in the function. 859252723Sdim unsigned NumSimpleReturnExprs; 860252723Sdim 861252723Sdim /// The last regular (non-return) debug location (breakpoint) in the function. 862252723Sdim SourceLocation LastStopPoint; 863252723Sdim 864252723Sdimpublic: 865252723Sdim /// A scope within which we are constructing the fields of an object which 866252723Sdim /// might use a CXXDefaultInitExpr. This stashes away a 'this' value to use 867252723Sdim /// if we need to evaluate a CXXDefaultInitExpr within the evaluation. 868252723Sdim class FieldConstructionScope { 869252723Sdim public: 870252723Sdim FieldConstructionScope(CodeGenFunction &CGF, llvm::Value *This) 871252723Sdim : CGF(CGF), OldCXXDefaultInitExprThis(CGF.CXXDefaultInitExprThis) { 872252723Sdim CGF.CXXDefaultInitExprThis = This; 873252723Sdim } 874252723Sdim ~FieldConstructionScope() { 875252723Sdim CGF.CXXDefaultInitExprThis = OldCXXDefaultInitExprThis; 876252723Sdim } 877252723Sdim 878252723Sdim private: 879252723Sdim CodeGenFunction &CGF; 880252723Sdim llvm::Value *OldCXXDefaultInitExprThis; 881252723Sdim }; 882252723Sdim 883252723Sdim /// The scope of a CXXDefaultInitExpr. Within this scope, the value of 'this' 884252723Sdim /// is overridden to be the object under construction. 885252723Sdim class CXXDefaultInitExprScope { 886252723Sdim public: 887252723Sdim CXXDefaultInitExprScope(CodeGenFunction &CGF) 888252723Sdim : CGF(CGF), OldCXXThisValue(CGF.CXXThisValue) { 889252723Sdim CGF.CXXThisValue = CGF.CXXDefaultInitExprThis; 890252723Sdim } 891252723Sdim ~CXXDefaultInitExprScope() { 892252723Sdim CGF.CXXThisValue = OldCXXThisValue; 893252723Sdim } 894252723Sdim 895252723Sdim public: 896252723Sdim CodeGenFunction &CGF; 897252723Sdim llvm::Value *OldCXXThisValue; 898252723Sdim }; 899252723Sdim 900252723Sdimprivate: 901199990Srdivacky /// CXXThisDecl - When generating code for a C++ member function, 902199990Srdivacky /// this will hold the implicit 'this' declaration. 903235633Sdim ImplicitParamDecl *CXXABIThisDecl; 904235633Sdim llvm::Value *CXXABIThisValue; 905204643Srdivacky llvm::Value *CXXThisValue; 906198092Srdivacky 907252723Sdim /// The value of 'this' to use when evaluating CXXDefaultInitExprs within 908252723Sdim /// this expression. 909252723Sdim llvm::Value *CXXDefaultInitExprThis; 910198092Srdivacky 911252723Sdim /// CXXStructorImplicitParamDecl - When generating code for a constructor or 912252723Sdim /// destructor, this will hold the implicit argument (e.g. VTT). 913252723Sdim ImplicitParamDecl *CXXStructorImplicitParamDecl; 914252723Sdim llvm::Value *CXXStructorImplicitParamValue; 915252723Sdim 916218893Sdim /// OutermostConditional - Points to the outermost active 917218893Sdim /// conditional control. This is used so that we know if a 918218893Sdim /// temporary should be destroyed conditionally. 919218893Sdim ConditionalEvaluation *OutermostConditional; 920198092Srdivacky 921252723Sdim /// The current lexical scope. 922252723Sdim LexicalScope *CurLexicalScope; 923218893Sdim 924263509Sdim /// The current source location that should be used for exception 925263509Sdim /// handling code. 926263509Sdim SourceLocation CurEHLocation; 927263509Sdim 928198092Srdivacky /// ByrefValueInfoMap - For each __block variable, contains a pair of the LLVM 929198092Srdivacky /// type as well as the field number that contains the actual data. 930226890Sdim llvm::DenseMap<const ValueDecl *, std::pair<llvm::Type *, 931198092Srdivacky unsigned> > ByRefValueInfo; 932200583Srdivacky 933210299Sed llvm::BasicBlock *TerminateLandingPad; 934200583Srdivacky llvm::BasicBlock *TerminateHandler; 935200583Srdivacky llvm::BasicBlock *TrapBB; 936200583Srdivacky 937245431Sdim /// Add a kernel metadata node to the named metadata node 'opencl.kernels'. 938245431Sdim /// In the kernel metadata node, reference the kernel function and metadata 939245431Sdim /// nodes for its optional attribute qualifiers (OpenCL 1.1 6.7.2): 940252723Sdim /// - A node for the vec_type_hint(<type>) qualifier contains string 941252723Sdim /// "vec_type_hint", an undefined value of the <type> data type, 942252723Sdim /// and a Boolean that is true if the <type> is integer and signed. 943245431Sdim /// - A node for the work_group_size_hint(X,Y,Z) qualifier contains string 944245431Sdim /// "work_group_size_hint", and three 32-bit integers X, Y and Z. 945245431Sdim /// - A node for the reqd_work_group_size(X,Y,Z) qualifier contains string 946245431Sdim /// "reqd_work_group_size", and three 32-bit integers X, Y and Z. 947245431Sdim void EmitOpenCLKernelMetadata(const FunctionDecl *FD, 948245431Sdim llvm::Function *Fn); 949245431Sdim 950193326Sedpublic: 951245431Sdim CodeGenFunction(CodeGenModule &cgm, bool suppressNewContext=false); 952235633Sdim ~CodeGenFunction(); 953193326Sed 954212904Sdim CodeGenTypes &getTypes() const { return CGM.getTypes(); } 955223017Sdim ASTContext &getContext() const { return CGM.getContext(); } 956221345Sdim CGDebugInfo *getDebugInfo() { 957221345Sdim if (DisableDebugInfo) 958221345Sdim return NULL; 959221345Sdim return DebugInfo; 960221345Sdim } 961221345Sdim void disableDebugInfo() { DisableDebugInfo = true; } 962221345Sdim void enableDebugInfo() { DisableDebugInfo = false; } 963193326Sed 964224145Sdim bool shouldUseFusedARCCalls() { 965224145Sdim return CGM.getCodeGenOpts().OptimizationLevel == 0; 966224145Sdim } 967221345Sdim 968235633Sdim const LangOptions &getLangOpts() const { return CGM.getLangOpts(); } 969218893Sdim 970226890Sdim /// Returns a pointer to the function's exception object and selector slot, 971226890Sdim /// which is assigned in every landing pad. 972210299Sed llvm::Value *getExceptionSlot(); 973223017Sdim llvm::Value *getEHSelectorSlot(); 974193326Sed 975226890Sdim /// Returns the contents of the function's exception object and selector 976226890Sdim /// slots. 977226890Sdim llvm::Value *getExceptionFromSlot(); 978226890Sdim llvm::Value *getSelectorFromSlot(); 979226890Sdim 980212904Sdim llvm::Value *getNormalCleanupDestSlot(); 981212904Sdim 982210299Sed llvm::BasicBlock *getUnreachableBlock() { 983210299Sed if (!UnreachableBlock) { 984210299Sed UnreachableBlock = createBasicBlock("unreachable"); 985210299Sed new llvm::UnreachableInst(getLLVMContext(), UnreachableBlock); 986210299Sed } 987210299Sed return UnreachableBlock; 988210299Sed } 989210299Sed 990210299Sed llvm::BasicBlock *getInvokeDest() { 991210299Sed if (!EHStack.requiresLandingPad()) return 0; 992210299Sed return getInvokeDestImpl(); 993210299Sed } 994210299Sed 995252723Sdim const TargetInfo &getTarget() const { return Target; } 996218893Sdim llvm::LLVMContext &getLLVMContext() { return CGM.getLLVMContext(); } 997198092Srdivacky 998193326Sed //===--------------------------------------------------------------------===// 999224145Sdim // Cleanups 1000224145Sdim //===--------------------------------------------------------------------===// 1001224145Sdim 1002224145Sdim typedef void Destroyer(CodeGenFunction &CGF, llvm::Value *addr, QualType ty); 1003224145Sdim 1004224145Sdim void pushIrregularPartialArrayCleanup(llvm::Value *arrayBegin, 1005224145Sdim llvm::Value *arrayEndPointer, 1006224145Sdim QualType elementType, 1007235633Sdim Destroyer *destroyer); 1008224145Sdim void pushRegularPartialArrayCleanup(llvm::Value *arrayBegin, 1009224145Sdim llvm::Value *arrayEnd, 1010224145Sdim QualType elementType, 1011235633Sdim Destroyer *destroyer); 1012224145Sdim 1013224145Sdim void pushDestroy(QualType::DestructionKind dtorKind, 1014224145Sdim llvm::Value *addr, QualType type); 1015252723Sdim void pushEHDestroy(QualType::DestructionKind dtorKind, 1016252723Sdim llvm::Value *addr, QualType type); 1017224145Sdim void pushDestroy(CleanupKind kind, llvm::Value *addr, QualType type, 1018235633Sdim Destroyer *destroyer, bool useEHCleanupForArray); 1019263509Sdim void pushLifetimeExtendedDestroy(CleanupKind kind, llvm::Value *addr, 1020263509Sdim QualType type, Destroyer *destroyer, 1021263509Sdim bool useEHCleanupForArray); 1022235633Sdim void emitDestroy(llvm::Value *addr, QualType type, Destroyer *destroyer, 1023224145Sdim bool useEHCleanupForArray); 1024263509Sdim llvm::Function *generateDestroyHelper(llvm::Constant *addr, QualType type, 1025235633Sdim Destroyer *destroyer, 1026263509Sdim bool useEHCleanupForArray, 1027263509Sdim const VarDecl *VD); 1028224145Sdim void emitArrayDestroy(llvm::Value *begin, llvm::Value *end, 1029235633Sdim QualType type, Destroyer *destroyer, 1030224145Sdim bool checkZeroLength, bool useEHCleanup); 1031224145Sdim 1032235633Sdim Destroyer *getDestroyer(QualType::DestructionKind destructionKind); 1033224145Sdim 1034224145Sdim /// Determines whether an EH cleanup is required to destroy a type 1035224145Sdim /// with the given destruction kind. 1036224145Sdim bool needsEHCleanup(QualType::DestructionKind kind) { 1037224145Sdim switch (kind) { 1038224145Sdim case QualType::DK_none: 1039224145Sdim return false; 1040224145Sdim case QualType::DK_cxx_destructor: 1041224145Sdim case QualType::DK_objc_weak_lifetime: 1042235633Sdim return getLangOpts().Exceptions; 1043224145Sdim case QualType::DK_objc_strong_lifetime: 1044235633Sdim return getLangOpts().Exceptions && 1045224145Sdim CGM.getCodeGenOpts().ObjCAutoRefCountExceptions; 1046224145Sdim } 1047224145Sdim llvm_unreachable("bad destruction kind"); 1048224145Sdim } 1049224145Sdim 1050224145Sdim CleanupKind getCleanupKind(QualType::DestructionKind kind) { 1051224145Sdim return (needsEHCleanup(kind) ? NormalAndEHCleanup : NormalCleanup); 1052224145Sdim } 1053224145Sdim 1054224145Sdim //===--------------------------------------------------------------------===// 1055193326Sed // Objective-C 1056193326Sed //===--------------------------------------------------------------------===// 1057193326Sed 1058193326Sed void GenerateObjCMethod(const ObjCMethodDecl *OMD); 1059193326Sed 1060193326Sed void StartObjCMethod(const ObjCMethodDecl *MD, 1061223017Sdim const ObjCContainerDecl *CD, 1062223017Sdim SourceLocation StartLoc); 1063193326Sed 1064193326Sed /// GenerateObjCGetter - Synthesize an Objective-C property getter function. 1065193326Sed void GenerateObjCGetter(ObjCImplementationDecl *IMP, 1066193326Sed const ObjCPropertyImplDecl *PID); 1067226890Sdim void generateObjCGetterBody(const ObjCImplementationDecl *classImpl, 1068235633Sdim const ObjCPropertyImplDecl *propImpl, 1069245431Sdim const ObjCMethodDecl *GetterMothodDecl, 1070235633Sdim llvm::Constant *AtomicHelperFn); 1071218893Sdim 1072207619Srdivacky void GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP, 1073207619Srdivacky ObjCMethodDecl *MD, bool ctor); 1074193326Sed 1075193326Sed /// GenerateObjCSetter - Synthesize an Objective-C property setter function 1076193326Sed /// for the given property. 1077193326Sed void GenerateObjCSetter(ObjCImplementationDecl *IMP, 1078193326Sed const ObjCPropertyImplDecl *PID); 1079226890Sdim void generateObjCSetterBody(const ObjCImplementationDecl *classImpl, 1080235633Sdim const ObjCPropertyImplDecl *propImpl, 1081235633Sdim llvm::Constant *AtomicHelperFn); 1082207619Srdivacky bool IndirectObjCSetterArg(const CGFunctionInfo &FI); 1083207619Srdivacky bool IvarTypeWithAggrGCObjects(QualType Ty); 1084193326Sed 1085193326Sed //===--------------------------------------------------------------------===// 1086193326Sed // Block Bits 1087193326Sed //===--------------------------------------------------------------------===// 1088193326Sed 1089218893Sdim llvm::Value *EmitBlockLiteral(const BlockExpr *); 1090235633Sdim llvm::Value *EmitBlockLiteral(const CGBlockInfo &Info); 1091235633Sdim static void destroyBlockInfos(CGBlockInfo *info); 1092204643Srdivacky llvm::Constant *BuildDescriptorBlockDecl(const BlockExpr *, 1093212904Sdim const CGBlockInfo &Info, 1094226890Sdim llvm::StructType *, 1095218893Sdim llvm::Constant *BlockVarLayout); 1096193326Sed 1097210299Sed llvm::Function *GenerateBlockFunction(GlobalDecl GD, 1098218893Sdim const CGBlockInfo &Info, 1099235633Sdim const DeclMapTy &ldm, 1100235633Sdim bool IsLambdaConversionToBlock); 1101193326Sed 1102218893Sdim llvm::Constant *GenerateCopyHelperFunction(const CGBlockInfo &blockInfo); 1103218893Sdim llvm::Constant *GenerateDestroyHelperFunction(const CGBlockInfo &blockInfo); 1104235633Sdim llvm::Constant *GenerateObjCAtomicSetterCopyHelperFunction( 1105235633Sdim const ObjCPropertyImplDecl *PID); 1106235633Sdim llvm::Constant *GenerateObjCAtomicGetterCopyHelperFunction( 1107235633Sdim const ObjCPropertyImplDecl *PID); 1108235633Sdim llvm::Value *EmitBlockCopyAndAutorelease(llvm::Value *Block, QualType Ty); 1109193326Sed 1110218893Sdim void BuildBlockRelease(llvm::Value *DeclPtr, BlockFieldFlags flags); 1111218893Sdim 1112221345Sdim class AutoVarEmission; 1113221345Sdim 1114221345Sdim void emitByrefStructureInit(const AutoVarEmission &emission); 1115221345Sdim void enterByrefCleanup(const AutoVarEmission &emission); 1116221345Sdim 1117218893Sdim llvm::Value *LoadBlockStruct() { 1118218893Sdim assert(BlockPointer && "no block pointer set!"); 1119218893Sdim return BlockPointer; 1120218893Sdim } 1121218893Sdim 1122208600Srdivacky void AllocateBlockCXXThisPointer(const CXXThisExpr *E); 1123235633Sdim void AllocateBlockDecl(const DeclRefExpr *E); 1124218893Sdim llvm::Value *GetAddrOfBlockDecl(const VarDecl *var, bool ByRef); 1125226890Sdim llvm::Type *BuildByRefType(const VarDecl *var); 1126193326Sed 1127221345Sdim void GenerateCode(GlobalDecl GD, llvm::Function *Fn, 1128221345Sdim const CGFunctionInfo &FnInfo); 1129252723Sdim void StartFunction(GlobalDecl GD, 1130252723Sdim QualType RetTy, 1131193326Sed llvm::Function *Fn, 1132221345Sdim const CGFunctionInfo &FnInfo, 1133193326Sed const FunctionArgList &Args, 1134193326Sed SourceLocation StartLoc); 1135193326Sed 1136204643Srdivacky void EmitConstructorBody(FunctionArgList &Args); 1137204643Srdivacky void EmitDestructorBody(FunctionArgList &Args); 1138252723Sdim void emitImplicitAssignmentOperatorBody(FunctionArgList &Args); 1139263509Sdim void EmitFunctionBody(FunctionArgList &Args, const Stmt *Body); 1140204643Srdivacky 1141263509Sdim void EmitForwardingCallToLambda(const CXXMethodDecl *LambdaCallOperator, 1142235633Sdim CallArgList &CallArgs); 1143235633Sdim void EmitLambdaToBlockPointerBody(FunctionArgList &Args); 1144235633Sdim void EmitLambdaBlockInvokeBody(); 1145235633Sdim void EmitLambdaDelegatingInvokeBody(const CXXMethodDecl *MD); 1146235633Sdim void EmitLambdaStaticInvokeFunction(const CXXMethodDecl *MD); 1147235633Sdim 1148193326Sed /// EmitReturnBlock - Emit the unified return block, trying to avoid its 1149193326Sed /// emission when possible. 1150193326Sed void EmitReturnBlock(); 1151193326Sed 1152193326Sed /// FinishFunction - Complete IR generation of the current function. It is 1153193326Sed /// legal to call this function even if there is no current insertion point. 1154193326Sed void FinishFunction(SourceLocation EndLoc=SourceLocation()); 1155193326Sed 1156263509Sdim void StartThunk(llvm::Function *Fn, GlobalDecl GD, const CGFunctionInfo &FnInfo); 1157263509Sdim 1158263509Sdim void EmitCallAndReturnForThunk(GlobalDecl GD, llvm::Value *Callee, 1159263509Sdim const ThunkInfo *Thunk); 1160263509Sdim 1161206084Srdivacky /// GenerateThunk - Generate a thunk for the given method. 1162221345Sdim void GenerateThunk(llvm::Function *Fn, const CGFunctionInfo &FnInfo, 1163221345Sdim GlobalDecl GD, const ThunkInfo &Thunk); 1164218893Sdim 1165223017Sdim void GenerateVarArgsThunk(llvm::Function *Fn, const CGFunctionInfo &FnInfo, 1166223017Sdim GlobalDecl GD, const ThunkInfo &Thunk); 1167223017Sdim 1168208600Srdivacky void EmitCtorPrologue(const CXXConstructorDecl *CD, CXXCtorType Type, 1169208600Srdivacky FunctionArgList &Args); 1170198893Srdivacky 1171235633Sdim void EmitInitializerForField(FieldDecl *Field, LValue LHS, Expr *Init, 1172235633Sdim ArrayRef<VarDecl *> ArrayIndexes); 1173235633Sdim 1174206084Srdivacky /// InitializeVTablePointer - Initialize the vtable pointer of the given 1175206084Srdivacky /// subobject. 1176206084Srdivacky /// 1177218893Sdim void InitializeVTablePointer(BaseSubobject Base, 1178207619Srdivacky const CXXRecordDecl *NearestVBase, 1179221345Sdim CharUnits OffsetFromNearestVBase, 1180206084Srdivacky const CXXRecordDecl *VTableClass); 1181198092Srdivacky 1182206084Srdivacky typedef llvm::SmallPtrSet<const CXXRecordDecl *, 4> VisitedVirtualBasesSetTy; 1183218893Sdim void InitializeVTablePointers(BaseSubobject Base, 1184207619Srdivacky const CXXRecordDecl *NearestVBase, 1185221345Sdim CharUnits OffsetFromNearestVBase, 1186206084Srdivacky bool BaseIsNonVirtualPrimaryBase, 1187206084Srdivacky const CXXRecordDecl *VTableClass, 1188206084Srdivacky VisitedVirtualBasesSetTy& VBases); 1189198092Srdivacky 1190206084Srdivacky void InitializeVTablePointers(const CXXRecordDecl *ClassDecl); 1191200583Srdivacky 1192218893Sdim /// GetVTablePtr - Return the Value of the vtable pointer member pointed 1193218893Sdim /// to by This. 1194226890Sdim llvm::Value *GetVTablePtr(llvm::Value *This, llvm::Type *Ty); 1195201361Srdivacky 1196263509Sdim 1197263509Sdim /// CanDevirtualizeMemberFunctionCalls - Checks whether virtual calls on given 1198263509Sdim /// expr can be devirtualized. 1199263509Sdim bool CanDevirtualizeMemberFunctionCall(const Expr *Base, 1200263509Sdim const CXXMethodDecl *MD); 1201263509Sdim 1202212904Sdim /// EnterDtorCleanups - Enter the cleanups necessary to complete the 1203212904Sdim /// given phase of destruction for a destructor. The end result 1204212904Sdim /// should call destructors on members and base classes in reverse 1205212904Sdim /// order of their construction. 1206212904Sdim void EnterDtorCleanups(const CXXDestructorDecl *Dtor, CXXDtorType Type); 1207198092Srdivacky 1208210299Sed /// ShouldInstrumentFunction - Return true if the current function should be 1209210299Sed /// instrumented with __cyg_profile_func_* calls 1210210299Sed bool ShouldInstrumentFunction(); 1211210299Sed 1212210299Sed /// EmitFunctionInstrumentation - Emit LLVM code to call the specified 1213210299Sed /// instrumentation function with the current function and the call site, if 1214210299Sed /// function instrumentation is enabled. 1215210299Sed void EmitFunctionInstrumentation(const char *Fn); 1216210299Sed 1217218893Sdim /// EmitMCountInstrumentation - Emit call to .mcount. 1218218893Sdim void EmitMCountInstrumentation(); 1219218893Sdim 1220193326Sed /// EmitFunctionProlog - Emit the target specific LLVM code to load the 1221193326Sed /// arguments for the given function. This is also responsible for naming the 1222193326Sed /// LLVM function arguments. 1223193326Sed void EmitFunctionProlog(const CGFunctionInfo &FI, 1224193326Sed llvm::Function *Fn, 1225193326Sed const FunctionArgList &Args); 1226193326Sed 1227193326Sed /// EmitFunctionEpilog - Emit the target specific LLVM code to return the 1228193326Sed /// given temporary. 1229263509Sdim void EmitFunctionEpilog(const CGFunctionInfo &FI, bool EmitRetDbgLoc, 1230263509Sdim SourceLocation EndLoc); 1231193326Sed 1232200583Srdivacky /// EmitStartEHSpec - Emit the start of the exception spec. 1233200583Srdivacky void EmitStartEHSpec(const Decl *D); 1234200583Srdivacky 1235200583Srdivacky /// EmitEndEHSpec - Emit the end of the exception spec. 1236200583Srdivacky void EmitEndEHSpec(const Decl *D); 1237200583Srdivacky 1238210299Sed /// getTerminateLandingPad - Return a landing pad that just calls terminate. 1239210299Sed llvm::BasicBlock *getTerminateLandingPad(); 1240210299Sed 1241210299Sed /// getTerminateHandler - Return a handler (not a landing pad, just 1242210299Sed /// a catch handler) that just calls terminate. This is used when 1243210299Sed /// a terminate scope encloses a try. 1244200583Srdivacky llvm::BasicBlock *getTerminateHandler(); 1245200583Srdivacky 1246224145Sdim llvm::Type *ConvertTypeForMem(QualType T); 1247224145Sdim llvm::Type *ConvertType(QualType T); 1248224145Sdim llvm::Type *ConvertType(const TypeDecl *T) { 1249203955Srdivacky return ConvertType(getContext().getTypeDeclType(T)); 1250203955Srdivacky } 1251193326Sed 1252193326Sed /// LoadObjCSelf - Load the value of self. This function is only valid while 1253193326Sed /// generating code for an Objective-C method. 1254193326Sed llvm::Value *LoadObjCSelf(); 1255193326Sed 1256193326Sed /// TypeOfSelfObject - Return type of object that this self represents. 1257193326Sed QualType TypeOfSelfObject(); 1258193326Sed 1259193326Sed /// hasAggregateLLVMType - Return true if the specified AST type will map into 1260193326Sed /// an aggregate LLVM type or is void. 1261252723Sdim static TypeEvaluationKind getEvaluationKind(QualType T); 1262193326Sed 1263252723Sdim static bool hasScalarEvaluationKind(QualType T) { 1264252723Sdim return getEvaluationKind(T) == TEK_Scalar; 1265252723Sdim } 1266252723Sdim 1267252723Sdim static bool hasAggregateEvaluationKind(QualType T) { 1268252723Sdim return getEvaluationKind(T) == TEK_Aggregate; 1269252723Sdim } 1270252723Sdim 1271193326Sed /// createBasicBlock - Create an LLVM basic block. 1272245431Sdim llvm::BasicBlock *createBasicBlock(const Twine &name = "", 1273218893Sdim llvm::Function *parent = 0, 1274218893Sdim llvm::BasicBlock *before = 0) { 1275193326Sed#ifdef NDEBUG 1276218893Sdim return llvm::BasicBlock::Create(getLLVMContext(), "", parent, before); 1277193326Sed#else 1278218893Sdim return llvm::BasicBlock::Create(getLLVMContext(), name, parent, before); 1279193326Sed#endif 1280193326Sed } 1281193326Sed 1282193326Sed /// getBasicBlockForLabel - Return the LLVM basicblock that the specified 1283193326Sed /// label maps to. 1284218893Sdim JumpDest getJumpDestForLabel(const LabelDecl *S); 1285193326Sed 1286199990Srdivacky /// SimplifyForwardingBlocks - If the given basic block is only a branch to 1287199990Srdivacky /// another basic block, simplify it. This assumes that no other code could 1288199990Srdivacky /// potentially reference the basic block. 1289193326Sed void SimplifyForwardingBlocks(llvm::BasicBlock *BB); 1290193326Sed 1291193326Sed /// EmitBlock - Emit the given block \arg BB and set it as the insert point, 1292193326Sed /// adding a fall-through branch from the current insert block if 1293193326Sed /// necessary. It is legal to call this function even if there is no current 1294193326Sed /// insertion point. 1295193326Sed /// 1296193326Sed /// IsFinished - If true, indicates that the caller has finished emitting 1297193326Sed /// branches to the given block and does not expect to emit code into it. This 1298193326Sed /// means the block can be ignored if it is unreachable. 1299193326Sed void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false); 1300193326Sed 1301226890Sdim /// EmitBlockAfterUses - Emit the given block somewhere hopefully 1302226890Sdim /// near its uses, and leave the insertion point in it. 1303226890Sdim void EmitBlockAfterUses(llvm::BasicBlock *BB); 1304226890Sdim 1305193326Sed /// EmitBranch - Emit a branch to the specified basic block from the current 1306193326Sed /// insert block, taking care to avoid creation of branches from dummy 1307193326Sed /// blocks. It is legal to call this function even if there is no current 1308193326Sed /// insertion point. 1309193326Sed /// 1310193326Sed /// This function clears the current insertion point. The caller should follow 1311193326Sed /// calls to this function with calls to Emit*Block prior to generation new 1312193326Sed /// code. 1313193326Sed void EmitBranch(llvm::BasicBlock *Block); 1314193326Sed 1315193326Sed /// HaveInsertPoint - True if an insertion point is defined. If not, this 1316193326Sed /// indicates that the current code being emitted is unreachable. 1317193326Sed bool HaveInsertPoint() const { 1318193326Sed return Builder.GetInsertBlock() != 0; 1319193326Sed } 1320193326Sed 1321193326Sed /// EnsureInsertPoint - Ensure that an insertion point is defined so that 1322193326Sed /// emitted IR has a place to go. Note that by definition, if this function 1323193326Sed /// creates a block then that block is unreachable; callers may do better to 1324193326Sed /// detect when no insertion point is defined and simply skip IR generation. 1325193326Sed void EnsureInsertPoint() { 1326193326Sed if (!HaveInsertPoint()) 1327193326Sed EmitBlock(createBasicBlock()); 1328193326Sed } 1329193326Sed 1330193326Sed /// ErrorUnsupported - Print out an error that codegen doesn't support the 1331193326Sed /// specified stmt yet. 1332263509Sdim void ErrorUnsupported(const Stmt *S, const char *Type); 1333193326Sed 1334193326Sed //===--------------------------------------------------------------------===// 1335193326Sed // Helpers 1336193326Sed //===--------------------------------------------------------------------===// 1337193326Sed 1338235633Sdim LValue MakeAddrLValue(llvm::Value *V, QualType T, 1339235633Sdim CharUnits Alignment = CharUnits()) { 1340218893Sdim return LValue::MakeAddr(V, T, Alignment, getContext(), 1341218893Sdim CGM.getTBAAInfo(T)); 1342198092Srdivacky } 1343245431Sdim 1344235633Sdim LValue MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T) { 1345235633Sdim CharUnits Alignment; 1346235633Sdim if (!T->isIncompleteType()) 1347235633Sdim Alignment = getContext().getTypeAlignInChars(T); 1348235633Sdim return LValue::MakeAddr(V, T, Alignment, getContext(), 1349235633Sdim CGM.getTBAAInfo(T)); 1350235633Sdim } 1351198092Srdivacky 1352193326Sed /// CreateTempAlloca - This creates a alloca and inserts it into the entry 1353203955Srdivacky /// block. The caller is responsible for setting an appropriate alignment on 1354203955Srdivacky /// the alloca. 1355226890Sdim llvm::AllocaInst *CreateTempAlloca(llvm::Type *Ty, 1356226890Sdim const Twine &Name = "tmp"); 1357193326Sed 1358207619Srdivacky /// InitTempAlloca - Provide an initial value for the given alloca. 1359207619Srdivacky void InitTempAlloca(llvm::AllocaInst *Alloca, llvm::Value *Value); 1360207619Srdivacky 1361204643Srdivacky /// CreateIRTemp - Create a temporary IR object of the given type, with 1362204643Srdivacky /// appropriate alignment. This routine should only be used when an temporary 1363204643Srdivacky /// value needs to be stored into an alloca (for example, to avoid explicit 1364204643Srdivacky /// PHI construction), but the type is the IR type, not the type appropriate 1365204643Srdivacky /// for storing in memory. 1366226890Sdim llvm::AllocaInst *CreateIRTemp(QualType T, const Twine &Name = "tmp"); 1367204643Srdivacky 1368203955Srdivacky /// CreateMemTemp - Create a temporary memory object of the given type, with 1369203955Srdivacky /// appropriate alignment. 1370226890Sdim llvm::AllocaInst *CreateMemTemp(QualType T, const Twine &Name = "tmp"); 1371203955Srdivacky 1372218893Sdim /// CreateAggTemp - Create a temporary memory object for the given 1373218893Sdim /// aggregate type. 1374226890Sdim AggValueSlot CreateAggTemp(QualType T, const Twine &Name = "tmp") { 1375235633Sdim CharUnits Alignment = getContext().getTypeAlignInChars(T); 1376235633Sdim return AggValueSlot::forAddr(CreateMemTemp(T, Name), Alignment, 1377235633Sdim T.getQualifiers(), 1378226890Sdim AggValueSlot::IsNotDestructed, 1379226890Sdim AggValueSlot::DoesNotNeedGCBarriers, 1380226890Sdim AggValueSlot::IsNotAliased); 1381218893Sdim } 1382218893Sdim 1383218893Sdim /// Emit a cast to void* in the appropriate address space. 1384218893Sdim llvm::Value *EmitCastToVoidPtr(llvm::Value *value); 1385218893Sdim 1386193326Sed /// EvaluateExprAsBool - Perform the usual unary conversions on the specified 1387193326Sed /// expression and compare the result against zero, returning an Int1Ty value. 1388193326Sed llvm::Value *EvaluateExprAsBool(const Expr *E); 1389193326Sed 1390218893Sdim /// EmitIgnoredExpr - Emit an expression in a context which ignores the result. 1391218893Sdim void EmitIgnoredExpr(const Expr *E); 1392218893Sdim 1393193326Sed /// EmitAnyExpr - Emit code to compute the specified expression which can have 1394193326Sed /// any type. The result is returned as an RValue struct. If this is an 1395193326Sed /// aggregate expression, the aggloc/agglocvolatile arguments indicate where 1396193326Sed /// the result should be returned. 1397193326Sed /// 1398245431Sdim /// \param ignoreResult True if the resulting value isn't used. 1399218893Sdim RValue EmitAnyExpr(const Expr *E, 1400245431Sdim AggValueSlot aggSlot = AggValueSlot::ignored(), 1401245431Sdim bool ignoreResult = false); 1402193326Sed 1403193326Sed // EmitVAListRef - Emit a "reference" to a va_list; this is either the address 1404193326Sed // or the value of the expression, depending on how va_list is defined. 1405193326Sed llvm::Value *EmitVAListRef(const Expr *E); 1406193326Sed 1407193326Sed /// EmitAnyExprToTemp - Similary to EmitAnyExpr(), however, the result will 1408193326Sed /// always be accessible even if no aggregate location is provided. 1409218893Sdim RValue EmitAnyExprToTemp(const Expr *E); 1410193326Sed 1411221345Sdim /// EmitAnyExprToMem - Emits the code necessary to evaluate an 1412207619Srdivacky /// arbitrary expression into the given memory location. 1413207619Srdivacky void EmitAnyExprToMem(const Expr *E, llvm::Value *Location, 1414224145Sdim Qualifiers Quals, bool IsInitializer); 1415207619Srdivacky 1416221345Sdim /// EmitExprAsInit - Emits the code necessary to initialize a 1417221345Sdim /// location in memory with the given initializer. 1418224145Sdim void EmitExprAsInit(const Expr *init, const ValueDecl *D, 1419224145Sdim LValue lvalue, bool capturedByInit); 1420221345Sdim 1421252723Sdim /// hasVolatileMember - returns true if aggregate type has a volatile 1422252723Sdim /// member. 1423252723Sdim bool hasVolatileMember(QualType T) { 1424252723Sdim if (const RecordType *RT = T->getAs<RecordType>()) { 1425252723Sdim const RecordDecl *RD = cast<RecordDecl>(RT->getDecl()); 1426252723Sdim return RD->hasVolatileMember(); 1427252723Sdim } 1428252723Sdim return false; 1429252723Sdim } 1430252723Sdim /// EmitAggregateCopy - Emit an aggregate assignment. 1431245431Sdim /// 1432245431Sdim /// The difference to EmitAggregateCopy is that tail padding is not copied. 1433245431Sdim /// This is required for correctness when assigning non-POD structures in C++. 1434245431Sdim void EmitAggregateAssign(llvm::Value *DestPtr, llvm::Value *SrcPtr, 1435252723Sdim QualType EltTy) { 1436252723Sdim bool IsVolatile = hasVolatileMember(EltTy); 1437252723Sdim EmitAggregateCopy(DestPtr, SrcPtr, EltTy, IsVolatile, CharUnits::Zero(), 1438252723Sdim true); 1439245431Sdim } 1440245431Sdim 1441252723Sdim /// EmitAggregateCopy - Emit an aggregate copy. 1442193326Sed /// 1443193326Sed /// \param isVolatile - True iff either the source or the destination is 1444193326Sed /// volatile. 1445245431Sdim /// \param isAssignment - If false, allow padding to be copied. This often 1446245431Sdim /// yields more efficient. 1447193326Sed void EmitAggregateCopy(llvm::Value *DestPtr, llvm::Value *SrcPtr, 1448235633Sdim QualType EltTy, bool isVolatile=false, 1449245431Sdim CharUnits Alignment = CharUnits::Zero(), 1450245431Sdim bool isAssignment = false); 1451193326Sed 1452193326Sed /// StartBlock - Start new block named N. If insert block is a dummy block 1453193326Sed /// then reuse it. 1454193326Sed void StartBlock(const char *N); 1455193326Sed 1456193326Sed /// GetAddrOfLocalVar - Return the address of a local variable. 1457212904Sdim llvm::Value *GetAddrOfLocalVar(const VarDecl *VD) { 1458212904Sdim llvm::Value *Res = LocalDeclMap[VD]; 1459212904Sdim assert(Res && "Invalid argument to GetAddrOfLocalVar(), no decl!"); 1460212904Sdim return Res; 1461212904Sdim } 1462193326Sed 1463218893Sdim /// getOpaqueLValueMapping - Given an opaque value expression (which 1464218893Sdim /// must be mapped to an l-value), return its mapping. 1465218893Sdim const LValue &getOpaqueLValueMapping(const OpaqueValueExpr *e) { 1466218893Sdim assert(OpaqueValueMapping::shouldBindAsLValue(e)); 1467218893Sdim 1468218893Sdim llvm::DenseMap<const OpaqueValueExpr*,LValue>::iterator 1469218893Sdim it = OpaqueLValues.find(e); 1470218893Sdim assert(it != OpaqueLValues.end() && "no mapping for opaque value!"); 1471218893Sdim return it->second; 1472218893Sdim } 1473218893Sdim 1474218893Sdim /// getOpaqueRValueMapping - Given an opaque value expression (which 1475218893Sdim /// must be mapped to an r-value), return its mapping. 1476218893Sdim const RValue &getOpaqueRValueMapping(const OpaqueValueExpr *e) { 1477218893Sdim assert(!OpaqueValueMapping::shouldBindAsLValue(e)); 1478218893Sdim 1479218893Sdim llvm::DenseMap<const OpaqueValueExpr*,RValue>::iterator 1480218893Sdim it = OpaqueRValues.find(e); 1481218893Sdim assert(it != OpaqueRValues.end() && "no mapping for opaque value!"); 1482218893Sdim return it->second; 1483218893Sdim } 1484218893Sdim 1485193326Sed /// getAccessedFieldNo - Given an encoded value and a result number, return 1486193326Sed /// the input field number being accessed. 1487193326Sed static unsigned getAccessedFieldNo(unsigned Idx, const llvm::Constant *Elts); 1488193326Sed 1489218893Sdim llvm::BlockAddress *GetAddrOfLabel(const LabelDecl *L); 1490198092Srdivacky llvm::BasicBlock *GetIndirectGotoBlock(); 1491193326Sed 1492208600Srdivacky /// EmitNullInitialization - Generate code to set a value of the given type to 1493208600Srdivacky /// null, If the type contains data member pointers, they will be initialized 1494208600Srdivacky /// to -1 in accordance with the Itanium C++ ABI. 1495208600Srdivacky void EmitNullInitialization(llvm::Value *DestPtr, QualType Ty); 1496193326Sed 1497193326Sed // EmitVAArg - Generate code to get an argument from the passed in pointer 1498193326Sed // and update it accordingly. The return value is a pointer to the argument. 1499193326Sed // FIXME: We should be able to get rid of this method and use the va_arg 1500193326Sed // instruction in LLVM instead once it works well enough. 1501193326Sed llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty); 1502193326Sed 1503224145Sdim /// emitArrayLength - Compute the length of an array, even if it's a 1504224145Sdim /// VLA, and drill down to the base element type. 1505224145Sdim llvm::Value *emitArrayLength(const ArrayType *arrayType, 1506224145Sdim QualType &baseType, 1507224145Sdim llvm::Value *&addr); 1508224145Sdim 1509224145Sdim /// EmitVLASize - Capture all the sizes for the VLA expressions in 1510224145Sdim /// the given variably-modified type and store them in the VLASizeMap. 1511198092Srdivacky /// 1512198092Srdivacky /// This function can be called with a null (unreachable) insert point. 1513224145Sdim void EmitVariablyModifiedType(QualType Ty); 1514193326Sed 1515224145Sdim /// getVLASize - Returns an LLVM value that corresponds to the size, 1516224145Sdim /// in non-variably-sized elements, of a variable length array type, 1517224145Sdim /// plus that largest non-variably-sized element type. Assumes that 1518224145Sdim /// the type has already been emitted with EmitVariablyModifiedType. 1519224145Sdim std::pair<llvm::Value*,QualType> getVLASize(const VariableArrayType *vla); 1520224145Sdim std::pair<llvm::Value*,QualType> getVLASize(QualType vla); 1521193326Sed 1522193326Sed /// LoadCXXThis - Load the value of 'this'. This function is only valid while 1523193326Sed /// generating code for an C++ member function. 1524204643Srdivacky llvm::Value *LoadCXXThis() { 1525204643Srdivacky assert(CXXThisValue && "no 'this' value for this function"); 1526204643Srdivacky return CXXThisValue; 1527204643Srdivacky } 1528198092Srdivacky 1529202379Srdivacky /// LoadCXXVTT - Load the VTT parameter to base constructors/destructors have 1530202379Srdivacky /// virtual bases. 1531252723Sdim // FIXME: Every place that calls LoadCXXVTT is something 1532252723Sdim // that needs to be abstracted properly. 1533204643Srdivacky llvm::Value *LoadCXXVTT() { 1534252723Sdim assert(CXXStructorImplicitParamValue && "no VTT value for this function"); 1535252723Sdim return CXXStructorImplicitParamValue; 1536204643Srdivacky } 1537203955Srdivacky 1538252723Sdim /// LoadCXXStructorImplicitParam - Load the implicit parameter 1539252723Sdim /// for a constructor/destructor. 1540252723Sdim llvm::Value *LoadCXXStructorImplicitParam() { 1541252723Sdim assert(CXXStructorImplicitParamValue && 1542252723Sdim "no implicit argument value for this function"); 1543252723Sdim return CXXStructorImplicitParamValue; 1544252723Sdim } 1545252723Sdim 1546203955Srdivacky /// GetAddressOfBaseOfCompleteClass - Convert the given pointer to a 1547207619Srdivacky /// complete class to the given direct base. 1548207619Srdivacky llvm::Value * 1549207619Srdivacky GetAddressOfDirectBaseInCompleteClass(llvm::Value *Value, 1550207619Srdivacky const CXXRecordDecl *Derived, 1551207619Srdivacky const CXXRecordDecl *Base, 1552207619Srdivacky bool BaseIsVirtual); 1553207619Srdivacky 1554199990Srdivacky /// GetAddressOfBaseClass - This function will add the necessary delta to the 1555199990Srdivacky /// load of 'this' and returns address of the base class. 1556218893Sdim llvm::Value *GetAddressOfBaseClass(llvm::Value *Value, 1557207619Srdivacky const CXXRecordDecl *Derived, 1558212904Sdim CastExpr::path_const_iterator PathBegin, 1559212904Sdim CastExpr::path_const_iterator PathEnd, 1560199990Srdivacky bool NullCheckValue); 1561207619Srdivacky 1562199990Srdivacky llvm::Value *GetAddressOfDerivedClass(llvm::Value *Value, 1563207619Srdivacky const CXXRecordDecl *Derived, 1564212904Sdim CastExpr::path_const_iterator PathBegin, 1565212904Sdim CastExpr::path_const_iterator PathEnd, 1566198092Srdivacky bool NullCheckValue); 1567199990Srdivacky 1568252723Sdim /// GetVTTParameter - Return the VTT parameter that should be passed to a 1569252723Sdim /// base constructor/destructor with virtual bases. 1570252723Sdim /// FIXME: VTTs are Itanium ABI-specific, so the definition should move 1571252723Sdim /// to ItaniumCXXABI.cpp together with all the references to VTT. 1572252723Sdim llvm::Value *GetVTTParameter(GlobalDecl GD, bool ForVirtualBase, 1573252723Sdim bool Delegating); 1574252723Sdim 1575204643Srdivacky void EmitDelegateCXXConstructorCall(const CXXConstructorDecl *Ctor, 1576204643Srdivacky CXXCtorType CtorType, 1577263509Sdim const FunctionArgList &Args, 1578263509Sdim SourceLocation Loc); 1579221345Sdim // It's important not to confuse this and the previous function. Delegating 1580221345Sdim // constructors are the C++0x feature. The constructor delegate optimization 1581221345Sdim // is used to reduce duplication in the base and complete consturctors where 1582221345Sdim // they are substantially the same. 1583221345Sdim void EmitDelegatingCXXConstructorCall(const CXXConstructorDecl *Ctor, 1584221345Sdim const FunctionArgList &Args); 1585198092Srdivacky void EmitCXXConstructorCall(const CXXConstructorDecl *D, CXXCtorType Type, 1586252723Sdim bool ForVirtualBase, bool Delegating, 1587252723Sdim llvm::Value *This, 1588193326Sed CallExpr::const_arg_iterator ArgBeg, 1589193326Sed CallExpr::const_arg_iterator ArgEnd); 1590218893Sdim 1591218893Sdim void EmitSynthesizedCXXCopyCtorCall(const CXXConstructorDecl *D, 1592218893Sdim llvm::Value *This, llvm::Value *Src, 1593218893Sdim CallExpr::const_arg_iterator ArgBeg, 1594218893Sdim CallExpr::const_arg_iterator ArgEnd); 1595193326Sed 1596198092Srdivacky void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D, 1597198092Srdivacky const ConstantArrayType *ArrayTy, 1598199990Srdivacky llvm::Value *ArrayPtr, 1599199990Srdivacky CallExpr::const_arg_iterator ArgBeg, 1600212904Sdim CallExpr::const_arg_iterator ArgEnd, 1601212904Sdim bool ZeroInitialization = false); 1602218893Sdim 1603198092Srdivacky void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D, 1604198092Srdivacky llvm::Value *NumElements, 1605199990Srdivacky llvm::Value *ArrayPtr, 1606199990Srdivacky CallExpr::const_arg_iterator ArgBeg, 1607212904Sdim CallExpr::const_arg_iterator ArgEnd, 1608212904Sdim bool ZeroInitialization = false); 1609198092Srdivacky 1610224145Sdim static Destroyer destroyCXXObject; 1611198092Srdivacky 1612193326Sed void EmitCXXDestructorCall(const CXXDestructorDecl *D, CXXDtorType Type, 1613252723Sdim bool ForVirtualBase, bool Delegating, 1614252723Sdim llvm::Value *This); 1615218893Sdim 1616226890Sdim void EmitNewArrayInitializer(const CXXNewExpr *E, QualType elementType, 1617226890Sdim llvm::Value *NewPtr, llvm::Value *NumElements); 1618198092Srdivacky 1619235633Sdim void EmitCXXTemporary(const CXXTemporary *Temporary, QualType TempType, 1620235633Sdim llvm::Value *Ptr); 1621198092Srdivacky 1622193326Sed llvm::Value *EmitCXXNewExpr(const CXXNewExpr *E); 1623198092Srdivacky void EmitCXXDeleteExpr(const CXXDeleteExpr *E); 1624198092Srdivacky 1625199482Srdivacky void EmitDeleteCall(const FunctionDecl *DeleteFD, llvm::Value *Ptr, 1626199482Srdivacky QualType DeleteTy); 1627199482Srdivacky 1628199482Srdivacky llvm::Value* EmitCXXTypeidExpr(const CXXTypeidExpr *E); 1629199482Srdivacky llvm::Value *EmitDynamicCast(llvm::Value *V, const CXXDynamicCastExpr *DCE); 1630245431Sdim llvm::Value* EmitCXXUuidofExpr(const CXXUuidofExpr *E); 1631199482Srdivacky 1632245431Sdim /// \brief Situations in which we might emit a check for the suitability of a 1633245431Sdim /// pointer or glvalue. 1634245431Sdim enum TypeCheckKind { 1635245431Sdim /// Checking the operand of a load. Must be suitably sized and aligned. 1636245431Sdim TCK_Load, 1637245431Sdim /// Checking the destination of a store. Must be suitably sized and aligned. 1638245431Sdim TCK_Store, 1639245431Sdim /// Checking the bound value in a reference binding. Must be suitably sized 1640245431Sdim /// and aligned, but is not required to refer to an object (until the 1641245431Sdim /// reference is used), per core issue 453. 1642245431Sdim TCK_ReferenceBinding, 1643245431Sdim /// Checking the object expression in a non-static data member access. Must 1644245431Sdim /// be an object within its lifetime. 1645245431Sdim TCK_MemberAccess, 1646245431Sdim /// Checking the 'this' pointer for a call to a non-static member function. 1647245431Sdim /// Must be an object within its lifetime. 1648245431Sdim TCK_MemberCall, 1649245431Sdim /// Checking the 'this' pointer for a constructor call. 1650252723Sdim TCK_ConstructorCall, 1651252723Sdim /// Checking the operand of a static_cast to a derived pointer type. Must be 1652252723Sdim /// null or an object within its lifetime. 1653252723Sdim TCK_DowncastPointer, 1654252723Sdim /// Checking the operand of a static_cast to a derived reference type. Must 1655252723Sdim /// be an object within its lifetime. 1656252723Sdim TCK_DowncastReference 1657245431Sdim }; 1658201361Srdivacky 1659245431Sdim /// \brief Emit a check that \p V is the address of storage of the 1660245431Sdim /// appropriate size and alignment for an object of type \p Type. 1661245431Sdim void EmitTypeCheck(TypeCheckKind TCK, SourceLocation Loc, llvm::Value *V, 1662245431Sdim QualType Type, CharUnits Alignment = CharUnits::Zero()); 1663245431Sdim 1664252723Sdim /// \brief Emit a check that \p Base points into an array object, which 1665252723Sdim /// we can access at index \p Index. \p Accessed should be \c false if we 1666252723Sdim /// this expression is used as an lvalue, for instance in "&Arr[Idx]". 1667252723Sdim void EmitBoundsCheck(const Expr *E, const Expr *Base, llvm::Value *Index, 1668252723Sdim QualType IndexType, bool Accessed); 1669252723Sdim 1670202379Srdivacky llvm::Value *EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV, 1671202379Srdivacky bool isInc, bool isPre); 1672202379Srdivacky ComplexPairTy EmitComplexPrePostIncDec(const UnaryOperator *E, LValue LV, 1673202379Srdivacky bool isInc, bool isPre); 1674193326Sed //===--------------------------------------------------------------------===// 1675193326Sed // Declaration Emission 1676193326Sed //===--------------------------------------------------------------------===// 1677193326Sed 1678198092Srdivacky /// EmitDecl - Emit a declaration. 1679198092Srdivacky /// 1680198092Srdivacky /// This function can be called with a null (unreachable) insert point. 1681193326Sed void EmitDecl(const Decl &D); 1682198092Srdivacky 1683218893Sdim /// EmitVarDecl - Emit a local variable declaration. 1684198092Srdivacky /// 1685198092Srdivacky /// This function can be called with a null (unreachable) insert point. 1686218893Sdim void EmitVarDecl(const VarDecl &D); 1687198092Srdivacky 1688224145Sdim void EmitScalarInit(const Expr *init, const ValueDecl *D, 1689224145Sdim LValue lvalue, bool capturedByInit); 1690224145Sdim void EmitScalarInit(llvm::Value *init, LValue lvalue); 1691224145Sdim 1692210299Sed typedef void SpecialInitFn(CodeGenFunction &Init, const VarDecl &D, 1693210299Sed llvm::Value *Address); 1694210299Sed 1695218893Sdim /// EmitAutoVarDecl - Emit an auto variable declaration. 1696198092Srdivacky /// 1697198092Srdivacky /// This function can be called with a null (unreachable) insert point. 1698219077Sdim void EmitAutoVarDecl(const VarDecl &D); 1699198092Srdivacky 1700219077Sdim class AutoVarEmission { 1701219077Sdim friend class CodeGenFunction; 1702219077Sdim 1703219077Sdim const VarDecl *Variable; 1704219077Sdim 1705219077Sdim /// The alignment of the variable. 1706219077Sdim CharUnits Alignment; 1707219077Sdim 1708219077Sdim /// The address of the alloca. Null if the variable was emitted 1709219077Sdim /// as a global constant. 1710219077Sdim llvm::Value *Address; 1711219077Sdim 1712219077Sdim llvm::Value *NRVOFlag; 1713219077Sdim 1714219077Sdim /// True if the variable is a __block variable. 1715219077Sdim bool IsByRef; 1716219077Sdim 1717219077Sdim /// True if the variable is of aggregate type and has a constant 1718219077Sdim /// initializer. 1719219077Sdim bool IsConstantAggregate; 1720219077Sdim 1721252723Sdim /// Non-null if we should use lifetime annotations. 1722252723Sdim llvm::Value *SizeForLifetimeMarkers; 1723252723Sdim 1724219077Sdim struct Invalid {}; 1725219077Sdim AutoVarEmission(Invalid) : Variable(0) {} 1726219077Sdim 1727219077Sdim AutoVarEmission(const VarDecl &variable) 1728219077Sdim : Variable(&variable), Address(0), NRVOFlag(0), 1729252723Sdim IsByRef(false), IsConstantAggregate(false), 1730252723Sdim SizeForLifetimeMarkers(0) {} 1731219077Sdim 1732219077Sdim bool wasEmittedAsGlobal() const { return Address == 0; } 1733219077Sdim 1734219077Sdim public: 1735219077Sdim static AutoVarEmission invalid() { return AutoVarEmission(Invalid()); } 1736219077Sdim 1737252723Sdim bool useLifetimeMarkers() const { return SizeForLifetimeMarkers != 0; } 1738252723Sdim llvm::Value *getSizeForLifetimeMarkers() const { 1739252723Sdim assert(useLifetimeMarkers()); 1740252723Sdim return SizeForLifetimeMarkers; 1741252723Sdim } 1742252723Sdim 1743252723Sdim /// Returns the raw, allocated address, which is not necessarily 1744252723Sdim /// the address of the object itself. 1745252723Sdim llvm::Value *getAllocatedAddress() const { 1746252723Sdim return Address; 1747252723Sdim } 1748252723Sdim 1749219077Sdim /// Returns the address of the object within this declaration. 1750219077Sdim /// Note that this does not chase the forwarding pointer for 1751219077Sdim /// __block decls. 1752219077Sdim llvm::Value *getObjectAddress(CodeGenFunction &CGF) const { 1753219077Sdim if (!IsByRef) return Address; 1754219077Sdim 1755219077Sdim return CGF.Builder.CreateStructGEP(Address, 1756219077Sdim CGF.getByRefValueLLVMField(Variable), 1757219077Sdim Variable->getNameAsString()); 1758219077Sdim } 1759219077Sdim }; 1760219077Sdim AutoVarEmission EmitAutoVarAlloca(const VarDecl &var); 1761219077Sdim void EmitAutoVarInit(const AutoVarEmission &emission); 1762219077Sdim void EmitAutoVarCleanups(const AutoVarEmission &emission); 1763224145Sdim void emitAutoVarTypeCleanup(const AutoVarEmission &emission, 1764224145Sdim QualType::DestructionKind dtorKind); 1765219077Sdim 1766218893Sdim void EmitStaticVarDecl(const VarDecl &D, 1767218893Sdim llvm::GlobalValue::LinkageTypes Linkage); 1768193326Sed 1769193326Sed /// EmitParmDecl - Emit a ParmVarDecl or an ImplicitParamDecl. 1770221345Sdim void EmitParmDecl(const VarDecl &D, llvm::Value *Arg, unsigned ArgNo); 1771193326Sed 1772218893Sdim /// protectFromPeepholes - Protect a value that we're intending to 1773218893Sdim /// store to the side, but which will probably be used later, from 1774218893Sdim /// aggressive peepholing optimizations that might delete it. 1775218893Sdim /// 1776218893Sdim /// Pass the result to unprotectFromPeepholes to declare that 1777218893Sdim /// protection is no longer required. 1778218893Sdim /// 1779218893Sdim /// There's no particular reason why this shouldn't apply to 1780218893Sdim /// l-values, it's just that no existing peepholes work on pointers. 1781218893Sdim PeepholeProtection protectFromPeepholes(RValue rvalue); 1782218893Sdim void unprotectFromPeepholes(PeepholeProtection protection); 1783218893Sdim 1784193326Sed //===--------------------------------------------------------------------===// 1785193326Sed // Statement Emission 1786193326Sed //===--------------------------------------------------------------------===// 1787193326Sed 1788193326Sed /// EmitStopPoint - Emit a debug stoppoint if we are emitting debug info. 1789193326Sed void EmitStopPoint(const Stmt *S); 1790193326Sed 1791193326Sed /// EmitStmt - Emit the code for the statement \arg S. It is legal to call 1792193326Sed /// this function even if there is no current insertion point. 1793193326Sed /// 1794193326Sed /// This function may clear the current insertion point; callers should use 1795193326Sed /// EnsureInsertPoint if they wish to subsequently generate code without first 1796193326Sed /// calling EmitBlock, EmitBranch, or EmitStmt. 1797193326Sed void EmitStmt(const Stmt *S); 1798193326Sed 1799193326Sed /// EmitSimpleStmt - Try to emit a "simple" statement which does not 1800193326Sed /// necessarily require an insertion point or debug information; typically 1801193326Sed /// because the statement amounts to a jump or a container of other 1802193326Sed /// statements. 1803193326Sed /// 1804193326Sed /// \return True if the statement was handled. 1805193326Sed bool EmitSimpleStmt(const Stmt *S); 1806193326Sed 1807263509Sdim llvm::Value *EmitCompoundStmt(const CompoundStmt &S, bool GetLast = false, 1808263509Sdim AggValueSlot AVS = AggValueSlot::ignored()); 1809263509Sdim llvm::Value *EmitCompoundStmtWithoutScope(const CompoundStmt &S, 1810263509Sdim bool GetLast = false, 1811263509Sdim AggValueSlot AVS = 1812263509Sdim AggValueSlot::ignored()); 1813193326Sed 1814193326Sed /// EmitLabel - Emit the block for the given label. It is legal to call this 1815193326Sed /// function even if there is no current insertion point. 1816218893Sdim void EmitLabel(const LabelDecl *D); // helper for EmitLabelStmt. 1817193326Sed 1818193326Sed void EmitLabelStmt(const LabelStmt &S); 1819235633Sdim void EmitAttributedStmt(const AttributedStmt &S); 1820193326Sed void EmitGotoStmt(const GotoStmt &S); 1821193326Sed void EmitIndirectGotoStmt(const IndirectGotoStmt &S); 1822193326Sed void EmitIfStmt(const IfStmt &S); 1823193326Sed void EmitWhileStmt(const WhileStmt &S); 1824193326Sed void EmitDoStmt(const DoStmt &S); 1825193326Sed void EmitForStmt(const ForStmt &S); 1826193326Sed void EmitReturnStmt(const ReturnStmt &S); 1827193326Sed void EmitDeclStmt(const DeclStmt &S); 1828193326Sed void EmitBreakStmt(const BreakStmt &S); 1829193326Sed void EmitContinueStmt(const ContinueStmt &S); 1830193326Sed void EmitSwitchStmt(const SwitchStmt &S); 1831193326Sed void EmitDefaultStmt(const DefaultStmt &S); 1832193326Sed void EmitCaseStmt(const CaseStmt &S); 1833193326Sed void EmitCaseStmtRange(const CaseStmt &S); 1834193326Sed void EmitAsmStmt(const AsmStmt &S); 1835193326Sed 1836193326Sed void EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S); 1837193326Sed void EmitObjCAtTryStmt(const ObjCAtTryStmt &S); 1838193326Sed void EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S); 1839193326Sed void EmitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt &S); 1840224145Sdim void EmitObjCAutoreleasePoolStmt(const ObjCAutoreleasePoolStmt &S); 1841193326Sed 1842223017Sdim llvm::Constant *getUnwindResumeFn(); 1843208600Srdivacky llvm::Constant *getUnwindResumeOrRethrowFn(); 1844210299Sed void EnterCXXTryStmt(const CXXTryStmt &S, bool IsFnTryBlock = false); 1845210299Sed void ExitCXXTryStmt(const CXXTryStmt &S, bool IsFnTryBlock = false); 1846204643Srdivacky 1847198092Srdivacky void EmitCXXTryStmt(const CXXTryStmt &S); 1848263509Sdim void EmitSEHTryStmt(const SEHTryStmt &S); 1849221345Sdim void EmitCXXForRangeStmt(const CXXForRangeStmt &S); 1850218893Sdim 1851263509Sdim llvm::Function *EmitCapturedStmt(const CapturedStmt &S, CapturedRegionKind K); 1852263509Sdim llvm::Function *GenerateCapturedStmtFunction(const CapturedDecl *CD, 1853263509Sdim const RecordDecl *RD, 1854263509Sdim SourceLocation Loc); 1855263509Sdim 1856193326Sed //===--------------------------------------------------------------------===// 1857193326Sed // LValue Expression Emission 1858193326Sed //===--------------------------------------------------------------------===// 1859193326Sed 1860193326Sed /// GetUndefRValue - Get an appropriate 'undef' rvalue for the given type. 1861193326Sed RValue GetUndefRValue(QualType Ty); 1862193326Sed 1863193326Sed /// EmitUnsupportedRValue - Emit a dummy r-value using the type of E 1864193326Sed /// and issue an ErrorUnsupported style diagnostic (using the 1865193326Sed /// provided Name). 1866193326Sed RValue EmitUnsupportedRValue(const Expr *E, 1867193326Sed const char *Name); 1868193326Sed 1869193326Sed /// EmitUnsupportedLValue - Emit a dummy l-value using the type of E and issue 1870193326Sed /// an ErrorUnsupported style diagnostic (using the provided Name). 1871193326Sed LValue EmitUnsupportedLValue(const Expr *E, 1872193326Sed const char *Name); 1873193326Sed 1874193326Sed /// EmitLValue - Emit code to compute a designator that specifies the location 1875193326Sed /// of the expression. 1876193326Sed /// 1877193326Sed /// This can return one of two things: a simple address or a bitfield 1878193326Sed /// reference. In either case, the LLVM Value* in the LValue structure is 1879193326Sed /// guaranteed to be an LLVM pointer type. 1880193326Sed /// 1881193326Sed /// If this returns a bitfield reference, nothing about the pointee type of 1882193326Sed /// the LLVM value is known: For example, it may not be a pointer to an 1883193326Sed /// integer. 1884193326Sed /// 1885193326Sed /// If this returns a normal address, and if the lvalue's C type is fixed 1886193326Sed /// size, this method guarantees that the returned pointer type will point to 1887193326Sed /// an LLVM type of the same size of the lvalue's type. If the lvalue has a 1888193326Sed /// variable length type, this is not possible. 1889193326Sed /// 1890193326Sed LValue EmitLValue(const Expr *E); 1891193326Sed 1892245431Sdim /// \brief Same as EmitLValue but additionally we generate checking code to 1893245431Sdim /// guard against undefined behavior. This is only suitable when we know 1894245431Sdim /// that the address will be used to access the object. 1895245431Sdim LValue EmitCheckedLValue(const Expr *E, TypeCheckKind TCK); 1896201361Srdivacky 1897263509Sdim RValue convertTempToRValue(llvm::Value *addr, QualType type, 1898263509Sdim SourceLocation Loc); 1899252723Sdim 1900252723Sdim void EmitAtomicInit(Expr *E, LValue lvalue); 1901252723Sdim 1902263509Sdim RValue EmitAtomicLoad(LValue lvalue, SourceLocation loc, 1903252723Sdim AggValueSlot slot = AggValueSlot::ignored()); 1904252723Sdim 1905252723Sdim void EmitAtomicStore(RValue rvalue, LValue lvalue, bool isInit); 1906252723Sdim 1907218893Sdim /// EmitToMemory - Change a scalar value from its value 1908218893Sdim /// representation to its in-memory representation. 1909218893Sdim llvm::Value *EmitToMemory(llvm::Value *Value, QualType Ty); 1910218893Sdim 1911218893Sdim /// EmitFromMemory - Change a scalar value from its memory 1912218893Sdim /// representation to its value representation. 1913218893Sdim llvm::Value *EmitFromMemory(llvm::Value *Value, QualType Ty); 1914218893Sdim 1915193326Sed /// EmitLoadOfScalar - Load a scalar value from an address, taking 1916193326Sed /// care to appropriately convert from the memory representation to 1917193326Sed /// the LLVM value representation. 1918193326Sed llvm::Value *EmitLoadOfScalar(llvm::Value *Addr, bool Volatile, 1919218893Sdim unsigned Alignment, QualType Ty, 1920263509Sdim SourceLocation Loc, 1921252723Sdim llvm::MDNode *TBAAInfo = 0, 1922252723Sdim QualType TBAABaseTy = QualType(), 1923252723Sdim uint64_t TBAAOffset = 0); 1924193326Sed 1925224145Sdim /// EmitLoadOfScalar - Load a scalar value from an address, taking 1926224145Sdim /// care to appropriately convert from the memory representation to 1927224145Sdim /// the LLVM value representation. The l-value must be a simple 1928224145Sdim /// l-value. 1929263509Sdim llvm::Value *EmitLoadOfScalar(LValue lvalue, SourceLocation Loc); 1930224145Sdim 1931193326Sed /// EmitStoreOfScalar - Store a scalar value to an address, taking 1932193326Sed /// care to appropriately convert from the memory representation to 1933193326Sed /// the LLVM value representation. 1934193326Sed void EmitStoreOfScalar(llvm::Value *Value, llvm::Value *Addr, 1935218893Sdim bool Volatile, unsigned Alignment, QualType Ty, 1936252723Sdim llvm::MDNode *TBAAInfo = 0, bool isInit = false, 1937252723Sdim QualType TBAABaseTy = QualType(), 1938252723Sdim uint64_t TBAAOffset = 0); 1939193326Sed 1940224145Sdim /// EmitStoreOfScalar - Store a scalar value to an address, taking 1941224145Sdim /// care to appropriately convert from the memory representation to 1942224145Sdim /// the LLVM value representation. The l-value must be a simple 1943235633Sdim /// l-value. The isInit flag indicates whether this is an initialization. 1944235633Sdim /// If so, atomic qualifiers are ignored and the store is always non-atomic. 1945235633Sdim void EmitStoreOfScalar(llvm::Value *value, LValue lvalue, bool isInit=false); 1946224145Sdim 1947193326Sed /// EmitLoadOfLValue - Given an expression that represents a value lvalue, 1948193326Sed /// this method emits the address of the lvalue, then loads the result as an 1949193326Sed /// rvalue, returning the rvalue. 1950263509Sdim RValue EmitLoadOfLValue(LValue V, SourceLocation Loc); 1951224145Sdim RValue EmitLoadOfExtVectorElementLValue(LValue V); 1952224145Sdim RValue EmitLoadOfBitfieldLValue(LValue LV); 1953193326Sed 1954193326Sed /// EmitStoreThroughLValue - Store the specified rvalue into the specified 1955193326Sed /// lvalue, where both are guaranteed to the have the same type, and that type 1956193326Sed /// is 'Ty'. 1957235633Sdim void EmitStoreThroughLValue(RValue Src, LValue Dst, bool isInit=false); 1958224145Sdim void EmitStoreThroughExtVectorComponentLValue(RValue Src, LValue Dst); 1959193326Sed 1960263509Sdim /// EmitStoreThroughBitfieldLValue - Store Src into Dst with same constraints 1961263509Sdim /// as EmitStoreThroughLValue. 1962193326Sed /// 1963193326Sed /// \param Result [out] - If non-null, this will be set to a Value* for the 1964193326Sed /// bit-field contents after the store, appropriate for use as the result of 1965193326Sed /// an assignment to the bit-field. 1966224145Sdim void EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, 1967193326Sed llvm::Value **Result=0); 1968193326Sed 1969218893Sdim /// Emit an l-value for an assignment (simple or compound) of complex type. 1970218893Sdim LValue EmitComplexAssignmentLValue(const BinaryOperator *E); 1971218893Sdim LValue EmitComplexCompoundAssignmentLValue(const CompoundAssignOperator *E); 1972263509Sdim LValue EmitScalarCompooundAssignWithComplex(const CompoundAssignOperator *E, 1973263509Sdim llvm::Value *&Result); 1974218893Sdim 1975221345Sdim // Note: only available for agg return types 1976193326Sed LValue EmitBinaryOperatorLValue(const BinaryOperator *E); 1977218893Sdim LValue EmitCompoundAssignmentLValue(const CompoundAssignOperator *E); 1978193326Sed // Note: only available for agg return types 1979193326Sed LValue EmitCallExprLValue(const CallExpr *E); 1980193326Sed // Note: only available for agg return types 1981193326Sed LValue EmitVAArgExprLValue(const VAArgExpr *E); 1982193326Sed LValue EmitDeclRefLValue(const DeclRefExpr *E); 1983193326Sed LValue EmitStringLiteralLValue(const StringLiteral *E); 1984193326Sed LValue EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E); 1985193326Sed LValue EmitPredefinedLValue(const PredefinedExpr *E); 1986193326Sed LValue EmitUnaryOpLValue(const UnaryOperator *E); 1987252723Sdim LValue EmitArraySubscriptExpr(const ArraySubscriptExpr *E, 1988252723Sdim bool Accessed = false); 1989193326Sed LValue EmitExtVectorElementExpr(const ExtVectorElementExpr *E); 1990193326Sed LValue EmitMemberExpr(const MemberExpr *E); 1991200583Srdivacky LValue EmitObjCIsaExpr(const ObjCIsaExpr *E); 1992193326Sed LValue EmitCompoundLiteralLValue(const CompoundLiteralExpr *E); 1993245431Sdim LValue EmitInitListLValue(const InitListExpr *E); 1994218893Sdim LValue EmitConditionalOperatorLValue(const AbstractConditionalOperator *E); 1995193326Sed LValue EmitCastLValue(const CastExpr *E); 1996224145Sdim LValue EmitMaterializeTemporaryExpr(const MaterializeTemporaryExpr *E); 1997218893Sdim LValue EmitOpaqueValueLValue(const OpaqueValueExpr *e); 1998218893Sdim 1999263509Sdim RValue EmitRValueForField(LValue LV, const FieldDecl *FD, SourceLocation Loc); 2000235633Sdim 2001235633Sdim class ConstantEmission { 2002235633Sdim llvm::PointerIntPair<llvm::Constant*, 1, bool> ValueAndIsReference; 2003235633Sdim ConstantEmission(llvm::Constant *C, bool isReference) 2004235633Sdim : ValueAndIsReference(C, isReference) {} 2005235633Sdim public: 2006235633Sdim ConstantEmission() {} 2007235633Sdim static ConstantEmission forReference(llvm::Constant *C) { 2008235633Sdim return ConstantEmission(C, true); 2009235633Sdim } 2010235633Sdim static ConstantEmission forValue(llvm::Constant *C) { 2011235633Sdim return ConstantEmission(C, false); 2012235633Sdim } 2013235633Sdim 2014263509Sdim LLVM_EXPLICIT operator bool() const { return ValueAndIsReference.getOpaqueValue() != 0; } 2015235633Sdim 2016235633Sdim bool isReference() const { return ValueAndIsReference.getInt(); } 2017235633Sdim LValue getReferenceLValue(CodeGenFunction &CGF, Expr *refExpr) const { 2018235633Sdim assert(isReference()); 2019235633Sdim return CGF.MakeNaturalAlignAddrLValue(ValueAndIsReference.getPointer(), 2020235633Sdim refExpr->getType()); 2021235633Sdim } 2022235633Sdim 2023235633Sdim llvm::Constant *getValue() const { 2024235633Sdim assert(!isReference()); 2025235633Sdim return ValueAndIsReference.getPointer(); 2026235633Sdim } 2027235633Sdim }; 2028235633Sdim 2029235633Sdim ConstantEmission tryEmitAsConstant(DeclRefExpr *refExpr); 2030235633Sdim 2031235633Sdim RValue EmitPseudoObjectRValue(const PseudoObjectExpr *e, 2032235633Sdim AggValueSlot slot = AggValueSlot::ignored()); 2033235633Sdim LValue EmitPseudoObjectLValue(const PseudoObjectExpr *e); 2034235633Sdim 2035193326Sed llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface, 2036193326Sed const ObjCIvarDecl *Ivar); 2037235633Sdim LValue EmitLValueForField(LValue Base, const FieldDecl* Field); 2038252723Sdim LValue EmitLValueForLambdaField(const FieldDecl *Field); 2039218893Sdim 2040203955Srdivacky /// EmitLValueForFieldInitialization - Like EmitLValueForField, except that 2041203955Srdivacky /// if the Field is a reference, this will return the address of the reference 2042203955Srdivacky /// and not the address of the value stored in the reference. 2043235633Sdim LValue EmitLValueForFieldInitialization(LValue Base, 2044235633Sdim const FieldDecl* Field); 2045218893Sdim 2046193326Sed LValue EmitLValueForIvar(QualType ObjectTy, 2047193326Sed llvm::Value* Base, const ObjCIvarDecl *Ivar, 2048193326Sed unsigned CVRQualifiers); 2049193326Sed 2050193326Sed LValue EmitCXXConstructLValue(const CXXConstructExpr *E); 2051193326Sed LValue EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E); 2052235633Sdim LValue EmitLambdaLValue(const LambdaExpr *E); 2053199482Srdivacky LValue EmitCXXTypeidLValue(const CXXTypeidExpr *E); 2054245431Sdim LValue EmitCXXUuidofLValue(const CXXUuidofExpr *E); 2055218893Sdim 2056193326Sed LValue EmitObjCMessageExprLValue(const ObjCMessageExpr *E); 2057193326Sed LValue EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E); 2058193326Sed LValue EmitStmtExprLValue(const StmtExpr *E); 2059198398Srdivacky LValue EmitPointerToDataMemberBinaryExpr(const BinaryOperator *E); 2060210299Sed LValue EmitObjCSelectorLValue(const ObjCSelectorExpr *E); 2061218893Sdim void EmitDeclRefExprDbgValue(const DeclRefExpr *E, llvm::Constant *Init); 2062218893Sdim 2063193326Sed //===--------------------------------------------------------------------===// 2064193326Sed // Scalar Expression Emission 2065193326Sed //===--------------------------------------------------------------------===// 2066193326Sed 2067193326Sed /// EmitCall - Generate a call of the given function, expecting the given 2068193326Sed /// result type, and using the given argument list which specifies both the 2069193326Sed /// LLVM arguments and the types they were derived from. 2070193326Sed /// 2071199990Srdivacky /// \param TargetDecl - If given, the decl of the function in a direct call; 2072199990Srdivacky /// used to set attributes on the call (noreturn, etc.). 2073193326Sed RValue EmitCall(const CGFunctionInfo &FnInfo, 2074193326Sed llvm::Value *Callee, 2075201361Srdivacky ReturnValueSlot ReturnValue, 2076193326Sed const CallArgList &Args, 2077207619Srdivacky const Decl *TargetDecl = 0, 2078207619Srdivacky llvm::Instruction **callOrInvoke = 0); 2079198092Srdivacky 2080201361Srdivacky RValue EmitCall(QualType FnType, llvm::Value *Callee, 2081263509Sdim SourceLocation CallLoc, 2082201361Srdivacky ReturnValueSlot ReturnValue, 2083193326Sed CallExpr::const_arg_iterator ArgBeg, 2084193326Sed CallExpr::const_arg_iterator ArgEnd, 2085193326Sed const Decl *TargetDecl = 0); 2086218893Sdim RValue EmitCallExpr(const CallExpr *E, 2087201361Srdivacky ReturnValueSlot ReturnValue = ReturnValueSlot()); 2088198092Srdivacky 2089252723Sdim llvm::CallInst *EmitRuntimeCall(llvm::Value *callee, 2090252723Sdim const Twine &name = ""); 2091252723Sdim llvm::CallInst *EmitRuntimeCall(llvm::Value *callee, 2092252723Sdim ArrayRef<llvm::Value*> args, 2093252723Sdim const Twine &name = ""); 2094252723Sdim llvm::CallInst *EmitNounwindRuntimeCall(llvm::Value *callee, 2095252723Sdim const Twine &name = ""); 2096252723Sdim llvm::CallInst *EmitNounwindRuntimeCall(llvm::Value *callee, 2097252723Sdim ArrayRef<llvm::Value*> args, 2098252723Sdim const Twine &name = ""); 2099252723Sdim 2100210299Sed llvm::CallSite EmitCallOrInvoke(llvm::Value *Callee, 2101226890Sdim ArrayRef<llvm::Value *> Args, 2102226890Sdim const Twine &Name = ""); 2103224145Sdim llvm::CallSite EmitCallOrInvoke(llvm::Value *Callee, 2104226890Sdim const Twine &Name = ""); 2105252723Sdim llvm::CallSite EmitRuntimeCallOrInvoke(llvm::Value *callee, 2106252723Sdim ArrayRef<llvm::Value*> args, 2107252723Sdim const Twine &name = ""); 2108252723Sdim llvm::CallSite EmitRuntimeCallOrInvoke(llvm::Value *callee, 2109252723Sdim const Twine &name = ""); 2110252723Sdim void EmitNoreturnRuntimeCallOrInvoke(llvm::Value *callee, 2111252723Sdim ArrayRef<llvm::Value*> args); 2112210299Sed 2113218893Sdim llvm::Value *BuildAppleKextVirtualCall(const CXXMethodDecl *MD, 2114218893Sdim NestedNameSpecifier *Qual, 2115226890Sdim llvm::Type *Ty); 2116218893Sdim 2117218893Sdim llvm::Value *BuildAppleKextVirtualDestructorCall(const CXXDestructorDecl *DD, 2118218893Sdim CXXDtorType Type, 2119218893Sdim const CXXRecordDecl *RD); 2120199482Srdivacky 2121193326Sed RValue EmitCXXMemberCall(const CXXMethodDecl *MD, 2122245431Sdim SourceLocation CallLoc, 2123193326Sed llvm::Value *Callee, 2124201361Srdivacky ReturnValueSlot ReturnValue, 2125193326Sed llvm::Value *This, 2126252723Sdim llvm::Value *ImplicitParam, 2127252723Sdim QualType ImplicitParamTy, 2128193326Sed CallExpr::const_arg_iterator ArgBeg, 2129193326Sed CallExpr::const_arg_iterator ArgEnd); 2130201361Srdivacky RValue EmitCXXMemberCallExpr(const CXXMemberCallExpr *E, 2131201361Srdivacky ReturnValueSlot ReturnValue); 2132201361Srdivacky RValue EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E, 2133201361Srdivacky ReturnValueSlot ReturnValue); 2134193326Sed 2135223017Sdim llvm::Value *EmitCXXOperatorMemberCallee(const CXXOperatorCallExpr *E, 2136223017Sdim const CXXMethodDecl *MD, 2137223017Sdim llvm::Value *This); 2138193326Sed RValue EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E, 2139201361Srdivacky const CXXMethodDecl *MD, 2140201361Srdivacky ReturnValueSlot ReturnValue); 2141198092Srdivacky 2142226890Sdim RValue EmitCUDAKernelCallExpr(const CUDAKernelCallExpr *E, 2143226890Sdim ReturnValueSlot ReturnValue); 2144218893Sdim 2145226890Sdim 2146198092Srdivacky RValue EmitBuiltinExpr(const FunctionDecl *FD, 2147193326Sed unsigned BuiltinID, const CallExpr *E); 2148193326Sed 2149201361Srdivacky RValue EmitBlockCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue); 2150193326Sed 2151193326Sed /// EmitTargetBuiltinExpr - Emit the given builtin call. Returns 0 if the call 2152193326Sed /// is unhandled by the current target. 2153193326Sed llvm::Value *EmitTargetBuiltinExpr(unsigned BuiltinID, const CallExpr *E); 2154193326Sed 2155263509Sdim llvm::Value *EmitAArch64CompareBuiltinExpr(llvm::Value *Op, llvm::Type *Ty, 2156263509Sdim const llvm::CmpInst::Predicate Fp, 2157263509Sdim const llvm::CmpInst::Predicate Ip, 2158263509Sdim const llvm::Twine &Name = ""); 2159263509Sdim llvm::Value *EmitAArch64CompareBuiltinExpr(llvm::Value *Op, llvm::Type *Ty); 2160252723Sdim llvm::Value *EmitAArch64BuiltinExpr(unsigned BuiltinID, const CallExpr *E); 2161204793Srdivacky llvm::Value *EmitARMBuiltinExpr(unsigned BuiltinID, const CallExpr *E); 2162218893Sdim llvm::Value *EmitNeonCall(llvm::Function *F, 2163226890Sdim SmallVectorImpl<llvm::Value*> &O, 2164218893Sdim const char *name, 2165210299Sed unsigned shift = 0, bool rightshift = false); 2166218893Sdim llvm::Value *EmitNeonSplat(llvm::Value *V, llvm::Constant *Idx); 2167226890Sdim llvm::Value *EmitNeonShiftVector(llvm::Value *V, llvm::Type *Ty, 2168210299Sed bool negateForRightShift); 2169263509Sdim llvm::Value *EmitNeonRShiftImm(llvm::Value *Vec, llvm::Value *Amt, 2170263509Sdim llvm::Type *Ty, bool usgn, const char *name); 2171218893Sdim 2172235633Sdim llvm::Value *BuildVector(ArrayRef<llvm::Value*> Ops); 2173193326Sed llvm::Value *EmitX86BuiltinExpr(unsigned BuiltinID, const CallExpr *E); 2174193326Sed llvm::Value *EmitPPCBuiltinExpr(unsigned BuiltinID, const CallExpr *E); 2175193326Sed 2176193326Sed llvm::Value *EmitObjCProtocolExpr(const ObjCProtocolExpr *E); 2177193326Sed llvm::Value *EmitObjCStringLiteral(const ObjCStringLiteral *E); 2178245431Sdim llvm::Value *EmitObjCBoxedExpr(const ObjCBoxedExpr *E); 2179235633Sdim llvm::Value *EmitObjCArrayLiteral(const ObjCArrayLiteral *E); 2180235633Sdim llvm::Value *EmitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E); 2181235633Sdim llvm::Value *EmitObjCCollectionLiteral(const Expr *E, 2182235633Sdim const ObjCMethodDecl *MethodWithObjects); 2183193326Sed llvm::Value *EmitObjCSelectorExpr(const ObjCSelectorExpr *E); 2184208600Srdivacky RValue EmitObjCMessageExpr(const ObjCMessageExpr *E, 2185208600Srdivacky ReturnValueSlot Return = ReturnValueSlot()); 2186193326Sed 2187224145Sdim /// Retrieves the default cleanup kind for an ARC cleanup. 2188224145Sdim /// Except under -fobjc-arc-eh, ARC cleanups are normal-only. 2189224145Sdim CleanupKind getARCCleanupKind() { 2190224145Sdim return CGM.getCodeGenOpts().ObjCAutoRefCountExceptions 2191224145Sdim ? NormalAndEHCleanup : NormalCleanup; 2192224145Sdim } 2193224145Sdim 2194224145Sdim // ARC primitives. 2195224145Sdim void EmitARCInitWeak(llvm::Value *value, llvm::Value *addr); 2196224145Sdim void EmitARCDestroyWeak(llvm::Value *addr); 2197224145Sdim llvm::Value *EmitARCLoadWeak(llvm::Value *addr); 2198224145Sdim llvm::Value *EmitARCLoadWeakRetained(llvm::Value *addr); 2199224145Sdim llvm::Value *EmitARCStoreWeak(llvm::Value *value, llvm::Value *addr, 2200224145Sdim bool ignored); 2201224145Sdim void EmitARCCopyWeak(llvm::Value *dst, llvm::Value *src); 2202224145Sdim void EmitARCMoveWeak(llvm::Value *dst, llvm::Value *src); 2203224145Sdim llvm::Value *EmitARCRetainAutorelease(QualType type, llvm::Value *value); 2204224145Sdim llvm::Value *EmitARCRetainAutoreleaseNonBlock(llvm::Value *value); 2205224145Sdim llvm::Value *EmitARCStoreStrong(LValue lvalue, llvm::Value *value, 2206252723Sdim bool resultIgnored); 2207224145Sdim llvm::Value *EmitARCStoreStrongCall(llvm::Value *addr, llvm::Value *value, 2208252723Sdim bool resultIgnored); 2209224145Sdim llvm::Value *EmitARCRetain(QualType type, llvm::Value *value); 2210224145Sdim llvm::Value *EmitARCRetainNonBlock(llvm::Value *value); 2211226890Sdim llvm::Value *EmitARCRetainBlock(llvm::Value *value, bool mandatory); 2212252723Sdim void EmitARCDestroyStrong(llvm::Value *addr, ARCPreciseLifetime_t precise); 2213252723Sdim void EmitARCRelease(llvm::Value *value, ARCPreciseLifetime_t precise); 2214224145Sdim llvm::Value *EmitARCAutorelease(llvm::Value *value); 2215224145Sdim llvm::Value *EmitARCAutoreleaseReturnValue(llvm::Value *value); 2216224145Sdim llvm::Value *EmitARCRetainAutoreleaseReturnValue(llvm::Value *value); 2217224145Sdim llvm::Value *EmitARCRetainAutoreleasedReturnValue(llvm::Value *value); 2218224145Sdim 2219224145Sdim std::pair<LValue,llvm::Value*> 2220224145Sdim EmitARCStoreAutoreleasing(const BinaryOperator *e); 2221224145Sdim std::pair<LValue,llvm::Value*> 2222224145Sdim EmitARCStoreStrong(const BinaryOperator *e, bool ignored); 2223224145Sdim 2224226890Sdim llvm::Value *EmitObjCThrowOperand(const Expr *expr); 2225226890Sdim 2226224145Sdim llvm::Value *EmitObjCProduceObject(QualType T, llvm::Value *Ptr); 2227224145Sdim llvm::Value *EmitObjCConsumeObject(QualType T, llvm::Value *Ptr); 2228224145Sdim llvm::Value *EmitObjCExtendObjectLifetime(QualType T, llvm::Value *Ptr); 2229224145Sdim 2230226890Sdim llvm::Value *EmitARCExtendBlockObject(const Expr *expr); 2231224145Sdim llvm::Value *EmitARCRetainScalarExpr(const Expr *expr); 2232224145Sdim llvm::Value *EmitARCRetainAutoreleaseScalarExpr(const Expr *expr); 2233224145Sdim 2234252723Sdim void EmitARCIntrinsicUse(llvm::ArrayRef<llvm::Value*> values); 2235252723Sdim 2236224145Sdim static Destroyer destroyARCStrongImprecise; 2237224145Sdim static Destroyer destroyARCStrongPrecise; 2238224145Sdim static Destroyer destroyARCWeak; 2239224145Sdim 2240224145Sdim void EmitObjCAutoreleasePoolPop(llvm::Value *Ptr); 2241224145Sdim llvm::Value *EmitObjCAutoreleasePoolPush(); 2242224145Sdim llvm::Value *EmitObjCMRRAutoreleasePoolPush(); 2243224145Sdim void EmitObjCAutoreleasePoolCleanup(llvm::Value *Ptr); 2244224145Sdim void EmitObjCMRRAutoreleasePoolPop(llvm::Value *Ptr); 2245224145Sdim 2246263509Sdim /// \brief Emits a reference binding to the passed in expression. 2247263509Sdim RValue EmitReferenceBindingToExpr(const Expr *E); 2248198092Srdivacky 2249193326Sed //===--------------------------------------------------------------------===// 2250193326Sed // Expression Emission 2251193326Sed //===--------------------------------------------------------------------===// 2252193326Sed 2253193326Sed // Expressions are broken into three classes: scalar, complex, aggregate. 2254193326Sed 2255193326Sed /// EmitScalarExpr - Emit the computation of the specified expression of LLVM 2256193326Sed /// scalar type, returning the result. 2257198092Srdivacky llvm::Value *EmitScalarExpr(const Expr *E , bool IgnoreResultAssign = false); 2258193326Sed 2259193326Sed /// EmitScalarConversion - Emit a conversion from the specified type to the 2260193326Sed /// specified destination type, both of which are LLVM scalar types. 2261193326Sed llvm::Value *EmitScalarConversion(llvm::Value *Src, QualType SrcTy, 2262193326Sed QualType DstTy); 2263193326Sed 2264193326Sed /// EmitComplexToScalarConversion - Emit a conversion from the specified 2265193326Sed /// complex type to the specified destination type, where the destination type 2266193326Sed /// is an LLVM scalar type. 2267193326Sed llvm::Value *EmitComplexToScalarConversion(ComplexPairTy Src, QualType SrcTy, 2268193326Sed QualType DstTy); 2269193326Sed 2270193326Sed 2271218893Sdim /// EmitAggExpr - Emit the computation of the specified expression 2272218893Sdim /// of aggregate type. The result is computed into the given slot, 2273218893Sdim /// which may be null to indicate that the value is not needed. 2274245431Sdim void EmitAggExpr(const Expr *E, AggValueSlot AS); 2275193326Sed 2276203955Srdivacky /// EmitAggExprToLValue - Emit the computation of the specified expression of 2277203955Srdivacky /// aggregate type into a temporary LValue. 2278203955Srdivacky LValue EmitAggExprToLValue(const Expr *E); 2279203955Srdivacky 2280198092Srdivacky /// EmitGCMemmoveCollectable - Emit special API for structs with object 2281198092Srdivacky /// pointers. 2282198092Srdivacky void EmitGCMemmoveCollectable(llvm::Value *DestPtr, llvm::Value *SrcPtr, 2283198092Srdivacky QualType Ty); 2284198092Srdivacky 2285224145Sdim /// EmitExtendGCLifetime - Given a pointer to an Objective-C object, 2286224145Sdim /// make sure it survives garbage collection until this point. 2287224145Sdim void EmitExtendGCLifetime(llvm::Value *object); 2288224145Sdim 2289193326Sed /// EmitComplexExpr - Emit the computation of the specified expression of 2290193326Sed /// complex type, returning the result. 2291218893Sdim ComplexPairTy EmitComplexExpr(const Expr *E, 2292218893Sdim bool IgnoreReal = false, 2293218893Sdim bool IgnoreImag = false); 2294193326Sed 2295252723Sdim /// EmitComplexExprIntoLValue - Emit the given expression of complex 2296252723Sdim /// type and place its result into the specified l-value. 2297252723Sdim void EmitComplexExprIntoLValue(const Expr *E, LValue dest, bool isInit); 2298193326Sed 2299252723Sdim /// EmitStoreOfComplex - Store a complex number into the specified l-value. 2300252723Sdim void EmitStoreOfComplex(ComplexPairTy V, LValue dest, bool isInit); 2301193326Sed 2302252723Sdim /// EmitLoadOfComplex - Load a complex number from the specified l-value. 2303263509Sdim ComplexPairTy EmitLoadOfComplex(LValue src, SourceLocation loc); 2304252723Sdim 2305218893Sdim /// CreateStaticVarDecl - Create a zero-initialized LLVM global for 2306218893Sdim /// a static local variable. 2307218893Sdim llvm::GlobalVariable *CreateStaticVarDecl(const VarDecl &D, 2308218893Sdim const char *Separator, 2309199990Srdivacky llvm::GlobalValue::LinkageTypes Linkage); 2310218893Sdim 2311218893Sdim /// AddInitializerToStaticVarDecl - Add the initializer for 'D' to the 2312200583Srdivacky /// global variable that has already been created for it. If the initializer 2313200583Srdivacky /// has a different type than GV does, this may free GV and return a different 2314200583Srdivacky /// one. Otherwise it just returns GV. 2315200583Srdivacky llvm::GlobalVariable * 2316218893Sdim AddInitializerToStaticVarDecl(const VarDecl &D, 2317218893Sdim llvm::GlobalVariable *GV); 2318193326Sed 2319193326Sed 2320198092Srdivacky /// EmitCXXGlobalVarDeclInit - Create the initializer for a C++ 2321198092Srdivacky /// variable with global storage. 2322235633Sdim void EmitCXXGlobalVarDeclInit(const VarDecl &D, llvm::Constant *DeclPtr, 2323235633Sdim bool PerformInit); 2324198092Srdivacky 2325245431Sdim /// Call atexit() with a function that passes the given argument to 2326245431Sdim /// the given function. 2327263509Sdim void registerGlobalDtorWithAtExit(const VarDecl &D, llvm::Constant *fn, 2328263509Sdim llvm::Constant *addr); 2329198092Srdivacky 2330218893Sdim /// Emit code in this function to perform a guarded variable 2331218893Sdim /// initialization. Guarded initializations are used when it's not 2332218893Sdim /// possible to prove that an initialization will be done exactly 2333218893Sdim /// once, e.g. with a static local variable or a static data member 2334218893Sdim /// of a class template. 2335235633Sdim void EmitCXXGuardedInit(const VarDecl &D, llvm::GlobalVariable *DeclPtr, 2336235633Sdim bool PerformInit); 2337218893Sdim 2338198092Srdivacky /// GenerateCXXGlobalInitFunc - Generates code for initializing global 2339198092Srdivacky /// variables. 2340198092Srdivacky void GenerateCXXGlobalInitFunc(llvm::Function *Fn, 2341252723Sdim ArrayRef<llvm::Constant *> Decls, 2342252723Sdim llvm::GlobalVariable *Guard = 0); 2343198092Srdivacky 2344235633Sdim /// GenerateCXXGlobalDtorsFunc - Generates code for destroying global 2345205408Srdivacky /// variables. 2346235633Sdim void GenerateCXXGlobalDtorsFunc(llvm::Function *Fn, 2347235633Sdim const std::vector<std::pair<llvm::WeakVH, 2348235633Sdim llvm::Constant*> > &DtorsAndObjects); 2349205408Srdivacky 2350221345Sdim void GenerateCXXGlobalVarDeclInitFunc(llvm::Function *Fn, 2351221345Sdim const VarDecl *D, 2352235633Sdim llvm::GlobalVariable *Addr, 2353235633Sdim bool PerformInit); 2354202379Srdivacky 2355218893Sdim void EmitCXXConstructExpr(const CXXConstructExpr *E, AggValueSlot Dest); 2356218893Sdim 2357218893Sdim void EmitSynthesizedCXXCopyCtor(llvm::Value *Dest, llvm::Value *Src, 2358218893Sdim const Expr *Exp); 2359198092Srdivacky 2360235633Sdim void enterFullExpression(const ExprWithCleanups *E) { 2361235633Sdim if (E->getNumObjects() == 0) return; 2362235633Sdim enterNonTrivialFullExpression(E); 2363235633Sdim } 2364235633Sdim void enterNonTrivialFullExpression(const ExprWithCleanups *E); 2365198092Srdivacky 2366252723Sdim void EmitCXXThrowExpr(const CXXThrowExpr *E, bool KeepInsertionPoint = true); 2367199482Srdivacky 2368235633Sdim void EmitLambdaExpr(const LambdaExpr *E, AggValueSlot Dest); 2369235633Sdim 2370226890Sdim RValue EmitAtomicExpr(AtomicExpr *E, llvm::Value *Dest = 0); 2371226890Sdim 2372193326Sed //===--------------------------------------------------------------------===// 2373226890Sdim // Annotations Emission 2374226890Sdim //===--------------------------------------------------------------------===// 2375226890Sdim 2376226890Sdim /// Emit an annotation call (intrinsic or builtin). 2377226890Sdim llvm::Value *EmitAnnotationCall(llvm::Value *AnnotationFn, 2378226890Sdim llvm::Value *AnnotatedVal, 2379252723Sdim StringRef AnnotationStr, 2380226890Sdim SourceLocation Location); 2381226890Sdim 2382226890Sdim /// Emit local annotations for the local variable V, declared by D. 2383226890Sdim void EmitVarAnnotations(const VarDecl *D, llvm::Value *V); 2384226890Sdim 2385226890Sdim /// Emit field annotations for the given field & value. Returns the 2386226890Sdim /// annotation result. 2387226890Sdim llvm::Value *EmitFieldAnnotations(const FieldDecl *D, llvm::Value *V); 2388226890Sdim 2389226890Sdim //===--------------------------------------------------------------------===// 2390193326Sed // Internal Helpers 2391193326Sed //===--------------------------------------------------------------------===// 2392193326Sed 2393193326Sed /// ContainsLabel - Return true if the statement contains a label in it. If 2394193326Sed /// this statement is not executed normally, it not containing a label means 2395193326Sed /// that we can just remove the code. 2396193326Sed static bool ContainsLabel(const Stmt *S, bool IgnoreCaseStmts = false); 2397193326Sed 2398221345Sdim /// containsBreak - Return true if the statement contains a break out of it. 2399221345Sdim /// If the statement (recursively) contains a switch or loop with a break 2400221345Sdim /// inside of it, this is fine. 2401221345Sdim static bool containsBreak(const Stmt *S); 2402221345Sdim 2403193326Sed /// ConstantFoldsToSimpleInteger - If the specified expression does not fold 2404221345Sdim /// to a constant, or if it does but contains a label, return false. If it 2405221345Sdim /// constant folds return true and set the boolean result in Result. 2406221345Sdim bool ConstantFoldsToSimpleInteger(const Expr *Cond, bool &Result); 2407193326Sed 2408221345Sdim /// ConstantFoldsToSimpleInteger - If the specified expression does not fold 2409221345Sdim /// to a constant, or if it does but contains a label, return false. If it 2410221345Sdim /// constant folds return true and set the folded value. 2411245431Sdim bool ConstantFoldsToSimpleInteger(const Expr *Cond, llvm::APSInt &Result); 2412221345Sdim 2413193326Sed /// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an 2414193326Sed /// if statement) to the specified blocks. Based on the condition, this might 2415193326Sed /// try to simplify the codegen of the conditional based on the branch. 2416193326Sed void EmitBranchOnBoolExpr(const Expr *Cond, llvm::BasicBlock *TrueBlock, 2417193326Sed llvm::BasicBlock *FalseBlock); 2418200583Srdivacky 2419245431Sdim /// \brief Emit a description of a type in a format suitable for passing to 2420245431Sdim /// a runtime sanitizer handler. 2421245431Sdim llvm::Constant *EmitCheckTypeDescriptor(QualType T); 2422218893Sdim 2423245431Sdim /// \brief Convert a value into a format suitable for passing to a runtime 2424245431Sdim /// sanitizer handler. 2425245431Sdim llvm::Value *EmitCheckValue(llvm::Value *V); 2426245431Sdim 2427245431Sdim /// \brief Emit a description of a source location in a format suitable for 2428245431Sdim /// passing to a runtime sanitizer handler. 2429245431Sdim llvm::Constant *EmitCheckSourceLocation(SourceLocation Loc); 2430245431Sdim 2431252723Sdim /// \brief Specify under what conditions this check can be recovered 2432252723Sdim enum CheckRecoverableKind { 2433252723Sdim /// Always terminate program execution if this check fails 2434252723Sdim CRK_Unrecoverable, 2435252723Sdim /// Check supports recovering, allows user to specify which 2436252723Sdim CRK_Recoverable, 2437252723Sdim /// Runtime conditionally aborts, always need to support recovery. 2438252723Sdim CRK_AlwaysRecoverable 2439252723Sdim }; 2440252723Sdim 2441245431Sdim /// \brief Create a basic block that will call a handler function in a 2442245431Sdim /// sanitizer runtime with the provided arguments, and create a conditional 2443245431Sdim /// branch to it. 2444245431Sdim void EmitCheck(llvm::Value *Checked, StringRef CheckName, 2445252723Sdim ArrayRef<llvm::Constant *> StaticArgs, 2446252723Sdim ArrayRef<llvm::Value *> DynamicArgs, 2447252723Sdim CheckRecoverableKind Recoverable); 2448245431Sdim 2449245431Sdim /// \brief Create a basic block that will call the trap intrinsic, and emit a 2450245431Sdim /// conditional branch to it, for the -ftrapv checks. 2451252723Sdim void EmitTrapCheck(llvm::Value *Checked); 2452245431Sdim 2453206084Srdivacky /// EmitCallArg - Emit a single call argument. 2454221345Sdim void EmitCallArg(CallArgList &args, const Expr *E, QualType ArgType); 2455206084Srdivacky 2456208600Srdivacky /// EmitDelegateCallArg - We are performing a delegate call; that 2457208600Srdivacky /// is, the current function is delegating to another one. Produce 2458208600Srdivacky /// a r-value suitable for passing the given parameter. 2459263509Sdim void EmitDelegateCallArg(CallArgList &args, const VarDecl *param, 2460263509Sdim SourceLocation loc); 2461208600Srdivacky 2462235633Sdim /// SetFPAccuracy - Set the minimum required accuracy of the given floating 2463235633Sdim /// point operation, expressed as the maximum relative error in ulp. 2464235633Sdim void SetFPAccuracy(llvm::Value *Val, float Accuracy); 2465235633Sdim 2466193326Sedprivate: 2467235633Sdim llvm::MDNode *getRangeForLoadFromType(QualType Ty); 2468193326Sed void EmitReturnOfRValue(RValue RV, QualType Ty); 2469193326Sed 2470193326Sed /// ExpandTypeFromArgs - Reconstruct a structure of type \arg Ty 2471193326Sed /// from function arguments into \arg Dst. See ABIArgInfo::Expand. 2472193326Sed /// 2473193326Sed /// \param AI - The first function argument of the expansion. 2474193326Sed /// \return The argument following the last expanded function 2475193326Sed /// argument. 2476193326Sed llvm::Function::arg_iterator 2477193326Sed ExpandTypeFromArgs(QualType Ty, LValue Dst, 2478193326Sed llvm::Function::arg_iterator AI); 2479193326Sed 2480193326Sed /// ExpandTypeToArgs - Expand an RValue \arg Src, with the LLVM type for \arg 2481193326Sed /// Ty, into individual arguments on the provided vector \arg Args. See 2482193326Sed /// ABIArgInfo::Expand. 2483193326Sed void ExpandTypeToArgs(QualType Ty, RValue Src, 2484263509Sdim SmallVectorImpl<llvm::Value *> &Args, 2485224145Sdim llvm::FunctionType *IRFuncTy); 2486193326Sed 2487245431Sdim llvm::Value* EmitAsmInput(const TargetInfo::ConstraintInfo &Info, 2488193326Sed const Expr *InputExpr, std::string &ConstraintStr); 2489193326Sed 2490245431Sdim llvm::Value* EmitAsmInputLValue(const TargetInfo::ConstraintInfo &Info, 2491212904Sdim LValue InputValue, QualType InputType, 2492263509Sdim std::string &ConstraintStr, 2493263509Sdim SourceLocation Loc); 2494212904Sdim 2495193326Sed /// EmitCallArgs - Emit call arguments for a function. 2496198092Srdivacky /// The CallArgTypeInfo parameter is used for iterating over the known 2497193326Sed /// argument types of the function being called. 2498193326Sed template<typename T> 2499193326Sed void EmitCallArgs(CallArgList& Args, const T* CallArgTypeInfo, 2500193326Sed CallExpr::const_arg_iterator ArgBeg, 2501263509Sdim CallExpr::const_arg_iterator ArgEnd, 2502263509Sdim bool ForceColumnInfo = false) { 2503263509Sdim CGDebugInfo *DI = getDebugInfo(); 2504263509Sdim SourceLocation CallLoc; 2505263509Sdim if (DI) CallLoc = DI->getLocation(); 2506193326Sed 2507263509Sdim CallExpr::const_arg_iterator Arg = ArgBeg; 2508263509Sdim 2509193326Sed // First, use the argument types that the type info knows about 2510193326Sed if (CallArgTypeInfo) { 2511193326Sed for (typename T::arg_type_iterator I = CallArgTypeInfo->arg_type_begin(), 2512193326Sed E = CallArgTypeInfo->arg_type_end(); I != E; ++I, ++Arg) { 2513199482Srdivacky assert(Arg != ArgEnd && "Running over edge of argument list!"); 2514193326Sed QualType ArgType = *I; 2515218893Sdim#ifndef NDEBUG 2516218893Sdim QualType ActualArgType = Arg->getType(); 2517218893Sdim if (ArgType->isPointerType() && ActualArgType->isPointerType()) { 2518218893Sdim QualType ActualBaseType = 2519218893Sdim ActualArgType->getAs<PointerType>()->getPointeeType(); 2520218893Sdim QualType ArgBaseType = 2521218893Sdim ArgType->getAs<PointerType>()->getPointeeType(); 2522218893Sdim if (ArgBaseType->isVariableArrayType()) { 2523218893Sdim if (const VariableArrayType *VAT = 2524218893Sdim getContext().getAsVariableArrayType(ActualBaseType)) { 2525218893Sdim if (!VAT->getSizeExpr()) 2526218893Sdim ActualArgType = ArgType; 2527218893Sdim } 2528218893Sdim } 2529218893Sdim } 2530193326Sed assert(getContext().getCanonicalType(ArgType.getNonReferenceType()). 2531198092Srdivacky getTypePtr() == 2532218893Sdim getContext().getCanonicalType(ActualArgType).getTypePtr() && 2533193326Sed "type mismatch in call argument!"); 2534218893Sdim#endif 2535221345Sdim EmitCallArg(Args, *Arg, ArgType); 2536263509Sdim 2537263509Sdim // Each argument expression could modify the debug 2538263509Sdim // location. Restore it. 2539263509Sdim if (DI) DI->EmitLocation(Builder, CallLoc, ForceColumnInfo); 2540193326Sed } 2541198092Srdivacky 2542198092Srdivacky // Either we've emitted all the call args, or we have a call to a 2543193326Sed // variadic function. 2544198092Srdivacky assert((Arg == ArgEnd || CallArgTypeInfo->isVariadic()) && 2545193326Sed "Extra arguments in non-variadic function!"); 2546198092Srdivacky 2547193326Sed } 2548198092Srdivacky 2549193326Sed // If we still have any arguments, emit them using the type of the argument. 2550263509Sdim for (; Arg != ArgEnd; ++Arg) { 2551221345Sdim EmitCallArg(Args, *Arg, Arg->getType()); 2552263509Sdim 2553263509Sdim // Restore the debug location. 2554263509Sdim if (DI) DI->EmitLocation(Builder, CallLoc, ForceColumnInfo); 2555263509Sdim } 2556193326Sed } 2557204643Srdivacky 2558204643Srdivacky const TargetCodeGenInfo &getTargetHooks() const { 2559204643Srdivacky return CGM.getTargetCodeGenInfo(); 2560204643Srdivacky } 2561210299Sed 2562210299Sed void EmitDeclMetadata(); 2563221345Sdim 2564221345Sdim CodeGenModule::ByrefHelpers * 2565226890Sdim buildByrefHelpers(llvm::StructType &byrefType, 2566221345Sdim const AutoVarEmission &emission); 2567235633Sdim 2568235633Sdim void AddObjCARCExceptionMetadata(llvm::Instruction *Inst); 2569235633Sdim 2570245431Sdim /// GetPointeeAlignment - Given an expression with a pointer type, emit the 2571245431Sdim /// value and compute our best estimate of the alignment of the pointee. 2572245431Sdim std::pair<llvm::Value*, unsigned> EmitPointerWithAlignment(const Expr *Addr); 2573193326Sed}; 2574193326Sed 2575218893Sdim/// Helper class with most of the code for saving a value for a 2576218893Sdim/// conditional expression cleanup. 2577218893Sdimstruct DominatingLLVMValue { 2578218893Sdim typedef llvm::PointerIntPair<llvm::Value*, 1, bool> saved_type; 2579218893Sdim 2580218893Sdim /// Answer whether the given value needs extra work to be saved. 2581218893Sdim static bool needsSaving(llvm::Value *value) { 2582218893Sdim // If it's not an instruction, we don't need to save. 2583218893Sdim if (!isa<llvm::Instruction>(value)) return false; 2584218893Sdim 2585218893Sdim // If it's an instruction in the entry block, we don't need to save. 2586218893Sdim llvm::BasicBlock *block = cast<llvm::Instruction>(value)->getParent(); 2587218893Sdim return (block != &block->getParent()->getEntryBlock()); 2588218893Sdim } 2589218893Sdim 2590218893Sdim /// Try to save the given value. 2591218893Sdim static saved_type save(CodeGenFunction &CGF, llvm::Value *value) { 2592218893Sdim if (!needsSaving(value)) return saved_type(value, false); 2593218893Sdim 2594218893Sdim // Otherwise we need an alloca. 2595218893Sdim llvm::Value *alloca = 2596218893Sdim CGF.CreateTempAlloca(value->getType(), "cond-cleanup.save"); 2597218893Sdim CGF.Builder.CreateStore(value, alloca); 2598218893Sdim 2599218893Sdim return saved_type(alloca, true); 2600218893Sdim } 2601218893Sdim 2602218893Sdim static llvm::Value *restore(CodeGenFunction &CGF, saved_type value) { 2603218893Sdim if (!value.getInt()) return value.getPointer(); 2604218893Sdim return CGF.Builder.CreateLoad(value.getPointer()); 2605218893Sdim } 2606212904Sdim}; 2607218893Sdim 2608218893Sdim/// A partial specialization of DominatingValue for llvm::Values that 2609218893Sdim/// might be llvm::Instructions. 2610218893Sdimtemplate <class T> struct DominatingPointer<T,true> : DominatingLLVMValue { 2611218893Sdim typedef T *type; 2612218893Sdim static type restore(CodeGenFunction &CGF, saved_type value) { 2613218893Sdim return static_cast<T*>(DominatingLLVMValue::restore(CGF, value)); 2614218893Sdim } 2615218893Sdim}; 2616218893Sdim 2617218893Sdim/// A specialization of DominatingValue for RValue. 2618218893Sdimtemplate <> struct DominatingValue<RValue> { 2619218893Sdim typedef RValue type; 2620218893Sdim class saved_type { 2621218893Sdim enum Kind { ScalarLiteral, ScalarAddress, AggregateLiteral, 2622218893Sdim AggregateAddress, ComplexAddress }; 2623218893Sdim 2624218893Sdim llvm::Value *Value; 2625218893Sdim Kind K; 2626218893Sdim saved_type(llvm::Value *v, Kind k) : Value(v), K(k) {} 2627218893Sdim 2628218893Sdim public: 2629218893Sdim static bool needsSaving(RValue value); 2630218893Sdim static saved_type save(CodeGenFunction &CGF, RValue value); 2631218893Sdim RValue restore(CodeGenFunction &CGF); 2632218893Sdim 2633218893Sdim // implementations in CGExprCXX.cpp 2634218893Sdim }; 2635218893Sdim 2636218893Sdim static bool needsSaving(type value) { 2637218893Sdim return saved_type::needsSaving(value); 2638218893Sdim } 2639218893Sdim static saved_type save(CodeGenFunction &CGF, type value) { 2640218893Sdim return saved_type::save(CGF, value); 2641218893Sdim } 2642218893Sdim static type restore(CodeGenFunction &CGF, saved_type value) { 2643218893Sdim return value.restore(CGF); 2644218893Sdim } 2645218893Sdim}; 2646218893Sdim 2647193326Sed} // end namespace CodeGen 2648193326Sed} // end namespace clang 2649193326Sed 2650193326Sed#endif 2651