CGDecl.cpp revision 730203088e9909e304c4868cbca72ee2652335bf
1//===--- CGDecl.cpp - Emit LLVM Code for declarations ---------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This contains code to emit Decl nodes as LLVM code. 11// 12//===----------------------------------------------------------------------===// 13 14#include "CGDebugInfo.h" 15#include "CodeGenFunction.h" 16#include "CodeGenModule.h" 17#include "clang/AST/ASTContext.h" 18#include "clang/AST/Decl.h" 19#include "clang/AST/DeclObjC.h" 20#include "clang/Basic/SourceManager.h" 21#include "clang/Basic/TargetInfo.h" 22#include "clang/CodeGen/CodeGenOptions.h" 23#include "llvm/GlobalVariable.h" 24#include "llvm/Intrinsics.h" 25#include "llvm/Target/TargetData.h" 26#include "llvm/Type.h" 27using namespace clang; 28using namespace CodeGen; 29 30 31void CodeGenFunction::EmitDecl(const Decl &D) { 32 switch (D.getKind()) { 33 default: 34 CGM.ErrorUnsupported(&D, "decl"); 35 return; 36 case Decl::ParmVar: 37 assert(0 && "Parmdecls should not be in declstmts!"); 38 case Decl::Function: // void X(); 39 case Decl::Record: // struct/union/class X; 40 case Decl::Enum: // enum X; 41 case Decl::EnumConstant: // enum ? { X = ? } 42 case Decl::CXXRecord: // struct/union/class X; [C++] 43 case Decl::Using: // using X; [C++] 44 case Decl::UsingShadow: 45 case Decl::UsingDirective: // using namespace X; [C++] 46 // None of these decls require codegen support. 47 return; 48 49 case Decl::Var: { 50 const VarDecl &VD = cast<VarDecl>(D); 51 assert(VD.isBlockVarDecl() && 52 "Should not see file-scope variables inside a function!"); 53 return EmitBlockVarDecl(VD); 54 } 55 56 case Decl::Typedef: { // typedef int X; 57 const TypedefDecl &TD = cast<TypedefDecl>(D); 58 QualType Ty = TD.getUnderlyingType(); 59 60 if (Ty->isVariablyModifiedType()) 61 EmitVLASize(Ty); 62 } 63 } 64} 65 66/// EmitBlockVarDecl - This method handles emission of any variable declaration 67/// inside a function, including static vars etc. 68void CodeGenFunction::EmitBlockVarDecl(const VarDecl &D) { 69 if (D.hasAttr<AsmLabelAttr>()) 70 CGM.ErrorUnsupported(&D, "__asm__"); 71 72 switch (D.getStorageClass()) { 73 case VarDecl::None: 74 case VarDecl::Auto: 75 case VarDecl::Register: 76 return EmitLocalBlockVarDecl(D); 77 case VarDecl::Static: 78 return EmitStaticBlockVarDecl(D); 79 case VarDecl::Extern: 80 case VarDecl::PrivateExtern: 81 // Don't emit it now, allow it to be emitted lazily on its first use. 82 return; 83 } 84 85 assert(0 && "Unknown storage class"); 86} 87 88llvm::GlobalVariable * 89CodeGenFunction::CreateStaticBlockVarDecl(const VarDecl &D, 90 const char *Separator, 91 llvm::GlobalValue::LinkageTypes 92 Linkage) { 93 QualType Ty = D.getType(); 94 assert(Ty->isConstantSizeType() && "VLAs can't be static"); 95 96 std::string Name; 97 if (getContext().getLangOptions().CPlusPlus) { 98 Name = CGM.getMangledName(&D); 99 } else { 100 std::string ContextName; 101 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurFuncDecl)) 102 ContextName = CGM.getMangledName(FD); 103 else if (isa<ObjCMethodDecl>(CurFuncDecl)) 104 ContextName = CurFn->getName(); 105 else 106 assert(0 && "Unknown context for block var decl"); 107 108 Name = ContextName + Separator + D.getNameAsString(); 109 } 110 111 const llvm::Type *LTy = CGM.getTypes().ConvertTypeForMem(Ty); 112 llvm::GlobalVariable *GV = 113 new llvm::GlobalVariable(CGM.getModule(), LTy, 114 Ty.isConstant(getContext()), Linkage, 115 CGM.EmitNullConstant(D.getType()), Name, 0, 116 D.isThreadSpecified(), Ty.getAddressSpace()); 117 GV->setAlignment(getContext().getDeclAlignInBytes(&D)); 118 return GV; 119} 120 121void CodeGenFunction::EmitStaticBlockVarDecl(const VarDecl &D) { 122 llvm::Value *&DMEntry = LocalDeclMap[&D]; 123 assert(DMEntry == 0 && "Decl already exists in localdeclmap!"); 124 125 llvm::GlobalVariable *GV = 126 CreateStaticBlockVarDecl(D, ".", llvm::GlobalValue::InternalLinkage); 127 128 // Store into LocalDeclMap before generating initializer to handle 129 // circular references. 130 DMEntry = GV; 131 132 // Make sure to evaluate VLA bounds now so that we have them for later. 133 // 134 // FIXME: Can this happen? 135 if (D.getType()->isVariablyModifiedType()) 136 EmitVLASize(D.getType()); 137 138 if (D.getInit()) { 139 llvm::Constant *Init = CGM.EmitConstantExpr(D.getInit(), D.getType(), this); 140 141 // If constant emission failed, then this should be a C++ static 142 // initializer. 143 if (!Init) { 144 if (!getContext().getLangOptions().CPlusPlus) 145 CGM.ErrorUnsupported(D.getInit(), "constant l-value expression"); 146 else 147 EmitStaticCXXBlockVarDeclInit(D, GV); 148 } else { 149 // The initializer may differ in type from the global. Rewrite 150 // the global to match the initializer. (We have to do this 151 // because some types, like unions, can't be completely represented 152 // in the LLVM type system.) 153 if (GV->getType() != Init->getType()) { 154 llvm::GlobalVariable *OldGV = GV; 155 156 GV = new llvm::GlobalVariable(CGM.getModule(), Init->getType(), 157 OldGV->isConstant(), 158 OldGV->getLinkage(), Init, "", 159 0, D.isThreadSpecified(), 160 D.getType().getAddressSpace()); 161 162 // Steal the name of the old global 163 GV->takeName(OldGV); 164 165 // Replace all uses of the old global with the new global 166 llvm::Constant *NewPtrForOldDecl = 167 llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); 168 OldGV->replaceAllUsesWith(NewPtrForOldDecl); 169 170 // Erase the old global, since it is no longer used. 171 OldGV->eraseFromParent(); 172 } 173 174 GV->setInitializer(Init); 175 } 176 } 177 178 // FIXME: Merge attribute handling. 179 if (const AnnotateAttr *AA = D.getAttr<AnnotateAttr>()) { 180 SourceManager &SM = CGM.getContext().getSourceManager(); 181 llvm::Constant *Ann = 182 CGM.EmitAnnotateAttr(GV, AA, 183 SM.getInstantiationLineNumber(D.getLocation())); 184 CGM.AddAnnotation(Ann); 185 } 186 187 if (const SectionAttr *SA = D.getAttr<SectionAttr>()) 188 GV->setSection(SA->getName()); 189 190 if (D.hasAttr<UsedAttr>()) 191 CGM.AddUsedGlobal(GV); 192 193 // We may have to cast the constant because of the initializer 194 // mismatch above. 195 // 196 // FIXME: It is really dangerous to store this in the map; if anyone 197 // RAUW's the GV uses of this constant will be invalid. 198 const llvm::Type *LTy = CGM.getTypes().ConvertTypeForMem(D.getType()); 199 const llvm::Type *LPtrTy = 200 llvm::PointerType::get(LTy, D.getType().getAddressSpace()); 201 DMEntry = llvm::ConstantExpr::getBitCast(GV, LPtrTy); 202 203 // Emit global variable debug descriptor for static vars. 204 CGDebugInfo *DI = getDebugInfo(); 205 if (DI) { 206 DI->setLocation(D.getLocation()); 207 DI->EmitGlobalVariable(static_cast<llvm::GlobalVariable *>(GV), &D); 208 } 209} 210 211unsigned CodeGenFunction::getByRefValueLLVMField(const ValueDecl *VD) const { 212 assert(ByRefValueInfo.count(VD) && "Did not find value!"); 213 214 return ByRefValueInfo.find(VD)->second.second; 215} 216 217/// BuildByRefType - This routine changes a __block variable declared as T x 218/// into: 219/// 220/// struct { 221/// void *__isa; 222/// void *__forwarding; 223/// int32_t __flags; 224/// int32_t __size; 225/// void *__copy_helper; // only if needed 226/// void *__destroy_helper; // only if needed 227/// char padding[X]; // only if needed 228/// T x; 229/// } x 230/// 231const llvm::Type *CodeGenFunction::BuildByRefType(const ValueDecl *D) { 232 std::pair<const llvm::Type *, unsigned> &Info = ByRefValueInfo[D]; 233 if (Info.first) 234 return Info.first; 235 236 QualType Ty = D->getType(); 237 238 std::vector<const llvm::Type *> Types; 239 240 const llvm::PointerType *Int8PtrTy = llvm::Type::getInt8PtrTy(VMContext); 241 242 llvm::PATypeHolder ByRefTypeHolder = llvm::OpaqueType::get(VMContext); 243 244 // void *__isa; 245 Types.push_back(Int8PtrTy); 246 247 // void *__forwarding; 248 Types.push_back(llvm::PointerType::getUnqual(ByRefTypeHolder)); 249 250 // int32_t __flags; 251 Types.push_back(llvm::Type::getInt32Ty(VMContext)); 252 253 // int32_t __size; 254 Types.push_back(llvm::Type::getInt32Ty(VMContext)); 255 256 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 257 if (HasCopyAndDispose) { 258 /// void *__copy_helper; 259 Types.push_back(Int8PtrTy); 260 261 /// void *__destroy_helper; 262 Types.push_back(Int8PtrTy); 263 } 264 265 bool Packed = false; 266 unsigned Align = getContext().getDeclAlignInBytes(D); 267 if (Align > Target.getPointerAlign(0) / 8) { 268 // We have to insert padding. 269 270 // The struct above has 2 32-bit integers. 271 unsigned CurrentOffsetInBytes = 4 * 2; 272 273 // And either 2 or 4 pointers. 274 CurrentOffsetInBytes += (HasCopyAndDispose ? 4 : 2) * 275 CGM.getTargetData().getTypeAllocSize(Int8PtrTy); 276 277 // Align the offset. 278 unsigned AlignedOffsetInBytes = 279 llvm::RoundUpToAlignment(CurrentOffsetInBytes, Align); 280 281 unsigned NumPaddingBytes = AlignedOffsetInBytes - CurrentOffsetInBytes; 282 if (NumPaddingBytes > 0) { 283 const llvm::Type *Ty = llvm::Type::getInt8Ty(VMContext); 284 // FIXME: We need a sema error for alignment larger than the minimum of 285 // the maximal stack alignmint and the alignment of malloc on the system. 286 if (NumPaddingBytes > 1) 287 Ty = llvm::ArrayType::get(Ty, NumPaddingBytes); 288 289 Types.push_back(Ty); 290 291 // We want a packed struct. 292 Packed = true; 293 } 294 } 295 296 // T x; 297 Types.push_back(ConvertType(Ty)); 298 299 const llvm::Type *T = llvm::StructType::get(VMContext, Types, Packed); 300 301 cast<llvm::OpaqueType>(ByRefTypeHolder.get())->refineAbstractTypeTo(T); 302 CGM.getModule().addTypeName("struct.__block_byref_" + D->getNameAsString(), 303 ByRefTypeHolder.get()); 304 305 Info.first = ByRefTypeHolder.get(); 306 307 Info.second = Types.size() - 1; 308 309 return Info.first; 310} 311 312/// EmitLocalBlockVarDecl - Emit code and set up an entry in LocalDeclMap for a 313/// variable declaration with auto, register, or no storage class specifier. 314/// These turn into simple stack objects, or GlobalValues depending on target. 315void CodeGenFunction::EmitLocalBlockVarDecl(const VarDecl &D) { 316 QualType Ty = D.getType(); 317 bool isByRef = D.hasAttr<BlocksAttr>(); 318 bool needsDispose = false; 319 unsigned Align = 0; 320 321 llvm::Value *DeclPtr; 322 if (Ty->isConstantSizeType()) { 323 if (!Target.useGlobalsForAutomaticVariables()) { 324 325 // All constant structs and arrays should be global if 326 // their initializer is constant and if the element type is POD. 327 if (CGM.getCodeGenOpts().MergeAllConstants) { 328 if (Ty.isConstant(getContext()) 329 && (Ty->isArrayType() || Ty->isRecordType()) 330 && (D.getInit() 331 && D.getInit()->isConstantInitializer(getContext())) 332 && Ty->isPODType()) { 333 EmitStaticBlockVarDecl(D); 334 return; 335 } 336 } 337 338 // A normal fixed sized variable becomes an alloca in the entry block. 339 const llvm::Type *LTy = ConvertTypeForMem(Ty); 340 Align = getContext().getDeclAlignInBytes(&D); 341 if (isByRef) 342 LTy = BuildByRefType(&D); 343 llvm::AllocaInst *Alloc = CreateTempAlloca(LTy); 344 Alloc->setName(D.getNameAsString().c_str()); 345 346 if (isByRef) 347 Align = std::max(Align, unsigned(Target.getPointerAlign(0) / 8)); 348 Alloc->setAlignment(Align); 349 DeclPtr = Alloc; 350 } else { 351 // Targets that don't support recursion emit locals as globals. 352 const char *Class = 353 D.getStorageClass() == VarDecl::Register ? ".reg." : ".auto."; 354 DeclPtr = CreateStaticBlockVarDecl(D, Class, 355 llvm::GlobalValue 356 ::InternalLinkage); 357 } 358 359 // FIXME: Can this happen? 360 if (Ty->isVariablyModifiedType()) 361 EmitVLASize(Ty); 362 } else { 363 EnsureInsertPoint(); 364 365 if (!DidCallStackSave) { 366 // Save the stack. 367 const llvm::Type *LTy = llvm::Type::getInt8PtrTy(VMContext); 368 llvm::Value *Stack = CreateTempAlloca(LTy, "saved_stack"); 369 370 llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::stacksave); 371 llvm::Value *V = Builder.CreateCall(F); 372 373 Builder.CreateStore(V, Stack); 374 375 DidCallStackSave = true; 376 377 { 378 // Push a cleanup block and restore the stack there. 379 DelayedCleanupBlock scope(*this); 380 381 V = Builder.CreateLoad(Stack, "tmp"); 382 llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::stackrestore); 383 Builder.CreateCall(F, V); 384 } 385 } 386 387 // Get the element type. 388 const llvm::Type *LElemTy = ConvertTypeForMem(Ty); 389 const llvm::Type *LElemPtrTy = 390 llvm::PointerType::get(LElemTy, D.getType().getAddressSpace()); 391 392 llvm::Value *VLASize = EmitVLASize(Ty); 393 394 // Downcast the VLA size expression 395 VLASize = Builder.CreateIntCast(VLASize, llvm::Type::getInt32Ty(VMContext), 396 false, "tmp"); 397 398 // Allocate memory for the array. 399 llvm::AllocaInst *VLA = 400 Builder.CreateAlloca(llvm::Type::getInt8Ty(VMContext), VLASize, "vla"); 401 VLA->setAlignment(getContext().getDeclAlignInBytes(&D)); 402 403 DeclPtr = Builder.CreateBitCast(VLA, LElemPtrTy, "tmp"); 404 } 405 406 llvm::Value *&DMEntry = LocalDeclMap[&D]; 407 assert(DMEntry == 0 && "Decl already exists in localdeclmap!"); 408 DMEntry = DeclPtr; 409 410 // Emit debug info for local var declaration. 411 if (CGDebugInfo *DI = getDebugInfo()) { 412 assert(HaveInsertPoint() && "Unexpected unreachable point!"); 413 414 DI->setLocation(D.getLocation()); 415 if (Target.useGlobalsForAutomaticVariables()) { 416 DI->EmitGlobalVariable(static_cast<llvm::GlobalVariable *>(DeclPtr), &D); 417 } else 418 DI->EmitDeclareOfAutoVariable(&D, DeclPtr, Builder); 419 } 420 421 // If this local has an initializer, emit it now. 422 const Expr *Init = D.getInit(); 423 424 // If we are at an unreachable point, we don't need to emit the initializer 425 // unless it contains a label. 426 if (!HaveInsertPoint()) { 427 if (!ContainsLabel(Init)) 428 Init = 0; 429 else 430 EnsureInsertPoint(); 431 } 432 433 if (Init) { 434 llvm::Value *Loc = DeclPtr; 435 if (isByRef) 436 Loc = Builder.CreateStructGEP(DeclPtr, getByRefValueLLVMField(&D), 437 D.getNameAsString()); 438 439 bool isVolatile = (getContext().getCanonicalType(D.getType()) 440 .isVolatileQualified()); 441 if (Ty->isReferenceType()) { 442 RValue RV = EmitReferenceBindingToExpr(Init, Ty, /*IsInitializer=*/true); 443 EmitStoreOfScalar(RV.getScalarVal(), Loc, false, Ty); 444 } else if (!hasAggregateLLVMType(Init->getType())) { 445 llvm::Value *V = EmitScalarExpr(Init); 446 EmitStoreOfScalar(V, Loc, isVolatile, D.getType()); 447 } else if (Init->getType()->isAnyComplexType()) { 448 EmitComplexExprIntoAddr(Init, Loc, isVolatile); 449 } else { 450 EmitAggExpr(Init, Loc, isVolatile); 451 } 452 } 453 454 if (isByRef) { 455 const llvm::PointerType *PtrToInt8Ty = llvm::Type::getInt8PtrTy(VMContext); 456 457 EnsureInsertPoint(); 458 llvm::Value *isa_field = Builder.CreateStructGEP(DeclPtr, 0); 459 llvm::Value *forwarding_field = Builder.CreateStructGEP(DeclPtr, 1); 460 llvm::Value *flags_field = Builder.CreateStructGEP(DeclPtr, 2); 461 llvm::Value *size_field = Builder.CreateStructGEP(DeclPtr, 3); 462 llvm::Value *V; 463 int flag = 0; 464 int flags = 0; 465 466 needsDispose = true; 467 468 if (Ty->isBlockPointerType()) { 469 flag |= BLOCK_FIELD_IS_BLOCK; 470 flags |= BLOCK_HAS_COPY_DISPOSE; 471 } else if (BlockRequiresCopying(Ty)) { 472 flag |= BLOCK_FIELD_IS_OBJECT; 473 flags |= BLOCK_HAS_COPY_DISPOSE; 474 } 475 476 // FIXME: Someone double check this. 477 if (Ty.isObjCGCWeak()) 478 flag |= BLOCK_FIELD_IS_WEAK; 479 480 int isa = 0; 481 if (flag&BLOCK_FIELD_IS_WEAK) 482 isa = 1; 483 V = llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), isa); 484 V = Builder.CreateIntToPtr(V, PtrToInt8Ty, "isa"); 485 Builder.CreateStore(V, isa_field); 486 487 Builder.CreateStore(DeclPtr, forwarding_field); 488 489 V = llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), flags); 490 Builder.CreateStore(V, flags_field); 491 492 const llvm::Type *V1; 493 V1 = cast<llvm::PointerType>(DeclPtr->getType())->getElementType(); 494 V = llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 495 (CGM.getTargetData().getTypeStoreSizeInBits(V1) 496 / 8)); 497 Builder.CreateStore(V, size_field); 498 499 if (flags & BLOCK_HAS_COPY_DISPOSE) { 500 BlockHasCopyDispose = true; 501 llvm::Value *copy_helper = Builder.CreateStructGEP(DeclPtr, 4); 502 Builder.CreateStore(BuildbyrefCopyHelper(DeclPtr->getType(), flag, Align), 503 copy_helper); 504 505 llvm::Value *destroy_helper = Builder.CreateStructGEP(DeclPtr, 5); 506 Builder.CreateStore(BuildbyrefDestroyHelper(DeclPtr->getType(), flag, 507 Align), 508 destroy_helper); 509 } 510 } 511 512 // Handle CXX destruction of variables. 513 QualType DtorTy(Ty); 514 while (const ArrayType *Array = getContext().getAsArrayType(DtorTy)) 515 DtorTy = getContext().getBaseElementType(Array); 516 if (const RecordType *RT = DtorTy->getAs<RecordType>()) 517 if (CXXRecordDecl *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 518 if (!ClassDecl->hasTrivialDestructor()) { 519 const CXXDestructorDecl *D = ClassDecl->getDestructor(getContext()); 520 assert(D && "EmitLocalBlockVarDecl - destructor is nul"); 521 522 if (const ConstantArrayType *Array = 523 getContext().getAsConstantArrayType(Ty)) { 524 DelayedCleanupBlock Scope(*this); 525 QualType BaseElementTy = getContext().getBaseElementType(Array); 526 const llvm::Type *BasePtr = ConvertType(BaseElementTy); 527 BasePtr = llvm::PointerType::getUnqual(BasePtr); 528 llvm::Value *BaseAddrPtr = 529 Builder.CreateBitCast(DeclPtr, BasePtr); 530 EmitCXXAggrDestructorCall(D, Array, BaseAddrPtr); 531 532 // Make sure to jump to the exit block. 533 EmitBranch(Scope.getCleanupExitBlock()); 534 } else { 535 DelayedCleanupBlock Scope(*this); 536 EmitCXXDestructorCall(D, Dtor_Complete, DeclPtr); 537 538 // Make sure to jump to the exit block. 539 EmitBranch(Scope.getCleanupExitBlock()); 540 } 541 } 542 } 543 544 // Handle the cleanup attribute 545 if (const CleanupAttr *CA = D.getAttr<CleanupAttr>()) { 546 const FunctionDecl *FD = CA->getFunctionDecl(); 547 548 llvm::Constant* F = CGM.GetAddrOfFunction(FD); 549 assert(F && "Could not find function!"); 550 551 DelayedCleanupBlock scope(*this); 552 553 const CGFunctionInfo &Info = CGM.getTypes().getFunctionInfo(FD); 554 555 // In some cases, the type of the function argument will be different from 556 // the type of the pointer. An example of this is 557 // void f(void* arg); 558 // __attribute__((cleanup(f))) void *g; 559 // 560 // To fix this we insert a bitcast here. 561 QualType ArgTy = Info.arg_begin()->type; 562 DeclPtr = Builder.CreateBitCast(DeclPtr, ConvertType(ArgTy)); 563 564 CallArgList Args; 565 Args.push_back(std::make_pair(RValue::get(DeclPtr), 566 getContext().getPointerType(D.getType()))); 567 568 EmitCall(Info, F, Args); 569 } 570 571 if (needsDispose && CGM.getLangOptions().getGCMode() != LangOptions::GCOnly) { 572 DelayedCleanupBlock scope(*this); 573 llvm::Value *V = Builder.CreateStructGEP(DeclPtr, 1, "forwarding"); 574 V = Builder.CreateLoad(V); 575 BuildBlockRelease(V); 576 } 577} 578 579/// Emit an alloca (or GlobalValue depending on target) 580/// for the specified parameter and set up LocalDeclMap. 581void CodeGenFunction::EmitParmDecl(const VarDecl &D, llvm::Value *Arg) { 582 // FIXME: Why isn't ImplicitParamDecl a ParmVarDecl? 583 assert((isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D)) && 584 "Invalid argument to EmitParmDecl"); 585 QualType Ty = D.getType(); 586 CanQualType CTy = getContext().getCanonicalType(Ty); 587 588 llvm::Value *DeclPtr; 589 if (!Ty->isConstantSizeType()) { 590 // Variable sized values always are passed by-reference. 591 DeclPtr = Arg; 592 } else { 593 // A fixed sized single-value variable becomes an alloca in the entry block. 594 const llvm::Type *LTy = ConvertTypeForMem(Ty); 595 if (LTy->isSingleValueType()) { 596 // TODO: Alignment 597 std::string Name = D.getNameAsString(); 598 Name += ".addr"; 599 DeclPtr = CreateTempAlloca(LTy); 600 DeclPtr->setName(Name.c_str()); 601 602 // Store the initial value into the alloca. 603 EmitStoreOfScalar(Arg, DeclPtr, CTy.isVolatileQualified(), Ty); 604 } else { 605 // Otherwise, if this is an aggregate, just use the input pointer. 606 DeclPtr = Arg; 607 } 608 Arg->setName(D.getNameAsString()); 609 } 610 611 llvm::Value *&DMEntry = LocalDeclMap[&D]; 612 assert(DMEntry == 0 && "Decl already exists in localdeclmap!"); 613 DMEntry = DeclPtr; 614 615 // Emit debug info for param declaration. 616 if (CGDebugInfo *DI = getDebugInfo()) { 617 DI->setLocation(D.getLocation()); 618 DI->EmitDeclareOfArgVariable(&D, DeclPtr, Builder); 619 } 620} 621