1243791Sdim//===--- SemaStmtAsm.cpp - Semantic Analysis for Asm Statements -----------===// 2243791Sdim// 3243791Sdim// The LLVM Compiler Infrastructure 4243791Sdim// 5243791Sdim// This file is distributed under the University of Illinois Open Source 6243791Sdim// License. See LICENSE.TXT for details. 7243791Sdim// 8243791Sdim//===----------------------------------------------------------------------===// 9243791Sdim// 10243791Sdim// This file implements semantic analysis for inline asm statements. 11243791Sdim// 12243791Sdim//===----------------------------------------------------------------------===// 13243791Sdim 14243791Sdim#include "clang/Sema/SemaInternal.h" 15243791Sdim#include "clang/AST/RecordLayout.h" 16243791Sdim#include "clang/AST/TypeLoc.h" 17252723Sdim#include "clang/Basic/TargetInfo.h" 18243791Sdim#include "clang/Lex/Preprocessor.h" 19252723Sdim#include "clang/Sema/Initialization.h" 20252723Sdim#include "clang/Sema/Lookup.h" 21252723Sdim#include "clang/Sema/Scope.h" 22252723Sdim#include "clang/Sema/ScopeInfo.h" 23243791Sdim#include "llvm/ADT/ArrayRef.h" 24243791Sdim#include "llvm/ADT/BitVector.h" 25243791Sdimusing namespace clang; 26243791Sdimusing namespace sema; 27243791Sdim 28243791Sdim/// CheckAsmLValue - GNU C has an extremely ugly extension whereby they silently 29243791Sdim/// ignore "noop" casts in places where an lvalue is required by an inline asm. 30243791Sdim/// We emulate this behavior when -fheinous-gnu-extensions is specified, but 31243791Sdim/// provide a strong guidance to not use it. 32243791Sdim/// 33243791Sdim/// This method checks to see if the argument is an acceptable l-value and 34243791Sdim/// returns false if it is a case we can handle. 35243791Sdimstatic bool CheckAsmLValue(const Expr *E, Sema &S) { 36243791Sdim // Type dependent expressions will be checked during instantiation. 37243791Sdim if (E->isTypeDependent()) 38243791Sdim return false; 39243791Sdim 40243791Sdim if (E->isLValue()) 41243791Sdim return false; // Cool, this is an lvalue. 42243791Sdim 43243791Sdim // Okay, this is not an lvalue, but perhaps it is the result of a cast that we 44243791Sdim // are supposed to allow. 45243791Sdim const Expr *E2 = E->IgnoreParenNoopCasts(S.Context); 46243791Sdim if (E != E2 && E2->isLValue()) { 47243791Sdim if (!S.getLangOpts().HeinousExtensions) 48243791Sdim S.Diag(E2->getLocStart(), diag::err_invalid_asm_cast_lvalue) 49243791Sdim << E->getSourceRange(); 50243791Sdim else 51243791Sdim S.Diag(E2->getLocStart(), diag::warn_invalid_asm_cast_lvalue) 52243791Sdim << E->getSourceRange(); 53243791Sdim // Accept, even if we emitted an error diagnostic. 54243791Sdim return false; 55243791Sdim } 56243791Sdim 57243791Sdim // None of the above, just randomly invalid non-lvalue. 58243791Sdim return true; 59243791Sdim} 60243791Sdim 61243791Sdim/// isOperandMentioned - Return true if the specified operand # is mentioned 62243791Sdim/// anywhere in the decomposed asm string. 63243791Sdimstatic bool isOperandMentioned(unsigned OpNo, 64243791Sdim ArrayRef<GCCAsmStmt::AsmStringPiece> AsmStrPieces) { 65243791Sdim for (unsigned p = 0, e = AsmStrPieces.size(); p != e; ++p) { 66243791Sdim const GCCAsmStmt::AsmStringPiece &Piece = AsmStrPieces[p]; 67243791Sdim if (!Piece.isOperand()) continue; 68243791Sdim 69243791Sdim // If this is a reference to the input and if the input was the smaller 70243791Sdim // one, then we have to reject this asm. 71243791Sdim if (Piece.getOperandNo() == OpNo) 72243791Sdim return true; 73243791Sdim } 74243791Sdim return false; 75243791Sdim} 76243791Sdim 77243791SdimStmtResult Sema::ActOnGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple, 78243791Sdim bool IsVolatile, unsigned NumOutputs, 79243791Sdim unsigned NumInputs, IdentifierInfo **Names, 80263509Sdim MultiExprArg constraints, MultiExprArg Exprs, 81243791Sdim Expr *asmString, MultiExprArg clobbers, 82243791Sdim SourceLocation RParenLoc) { 83243791Sdim unsigned NumClobbers = clobbers.size(); 84243791Sdim StringLiteral **Constraints = 85243791Sdim reinterpret_cast<StringLiteral**>(constraints.data()); 86243791Sdim StringLiteral *AsmString = cast<StringLiteral>(asmString); 87243791Sdim StringLiteral **Clobbers = reinterpret_cast<StringLiteral**>(clobbers.data()); 88243791Sdim 89243791Sdim SmallVector<TargetInfo::ConstraintInfo, 4> OutputConstraintInfos; 90243791Sdim 91243791Sdim // The parser verifies that there is a string literal here. 92243791Sdim if (!AsmString->isAscii()) 93243791Sdim return StmtError(Diag(AsmString->getLocStart(),diag::err_asm_wide_character) 94243791Sdim << AsmString->getSourceRange()); 95243791Sdim 96243791Sdim for (unsigned i = 0; i != NumOutputs; i++) { 97243791Sdim StringLiteral *Literal = Constraints[i]; 98243791Sdim if (!Literal->isAscii()) 99243791Sdim return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 100243791Sdim << Literal->getSourceRange()); 101243791Sdim 102243791Sdim StringRef OutputName; 103243791Sdim if (Names[i]) 104243791Sdim OutputName = Names[i]->getName(); 105243791Sdim 106243791Sdim TargetInfo::ConstraintInfo Info(Literal->getString(), OutputName); 107243791Sdim if (!Context.getTargetInfo().validateOutputConstraint(Info)) 108243791Sdim return StmtError(Diag(Literal->getLocStart(), 109243791Sdim diag::err_asm_invalid_output_constraint) 110243791Sdim << Info.getConstraintStr()); 111243791Sdim 112243791Sdim // Check that the output exprs are valid lvalues. 113243791Sdim Expr *OutputExpr = Exprs[i]; 114252723Sdim if (CheckAsmLValue(OutputExpr, *this)) 115243791Sdim return StmtError(Diag(OutputExpr->getLocStart(), 116252723Sdim diag::err_asm_invalid_lvalue_in_output) 117252723Sdim << OutputExpr->getSourceRange()); 118243791Sdim 119252723Sdim if (RequireCompleteType(OutputExpr->getLocStart(), Exprs[i]->getType(), 120252723Sdim diag::err_dereference_incomplete_type)) 121252723Sdim return StmtError(); 122252723Sdim 123243791Sdim OutputConstraintInfos.push_back(Info); 124243791Sdim } 125243791Sdim 126243791Sdim SmallVector<TargetInfo::ConstraintInfo, 4> InputConstraintInfos; 127243791Sdim 128243791Sdim for (unsigned i = NumOutputs, e = NumOutputs + NumInputs; i != e; i++) { 129243791Sdim StringLiteral *Literal = Constraints[i]; 130243791Sdim if (!Literal->isAscii()) 131243791Sdim return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 132243791Sdim << Literal->getSourceRange()); 133243791Sdim 134243791Sdim StringRef InputName; 135243791Sdim if (Names[i]) 136243791Sdim InputName = Names[i]->getName(); 137243791Sdim 138243791Sdim TargetInfo::ConstraintInfo Info(Literal->getString(), InputName); 139243791Sdim if (!Context.getTargetInfo().validateInputConstraint(OutputConstraintInfos.data(), 140243791Sdim NumOutputs, Info)) { 141243791Sdim return StmtError(Diag(Literal->getLocStart(), 142243791Sdim diag::err_asm_invalid_input_constraint) 143243791Sdim << Info.getConstraintStr()); 144243791Sdim } 145243791Sdim 146243791Sdim Expr *InputExpr = Exprs[i]; 147243791Sdim 148243791Sdim // Only allow void types for memory constraints. 149243791Sdim if (Info.allowsMemory() && !Info.allowsRegister()) { 150243791Sdim if (CheckAsmLValue(InputExpr, *this)) 151243791Sdim return StmtError(Diag(InputExpr->getLocStart(), 152243791Sdim diag::err_asm_invalid_lvalue_in_input) 153243791Sdim << Info.getConstraintStr() 154243791Sdim << InputExpr->getSourceRange()); 155243791Sdim } 156243791Sdim 157243791Sdim if (Info.allowsRegister()) { 158243791Sdim if (InputExpr->getType()->isVoidType()) { 159243791Sdim return StmtError(Diag(InputExpr->getLocStart(), 160243791Sdim diag::err_asm_invalid_type_in_input) 161243791Sdim << InputExpr->getType() << Info.getConstraintStr() 162243791Sdim << InputExpr->getSourceRange()); 163243791Sdim } 164243791Sdim } 165243791Sdim 166243791Sdim ExprResult Result = DefaultFunctionArrayLvalueConversion(Exprs[i]); 167243791Sdim if (Result.isInvalid()) 168243791Sdim return StmtError(); 169243791Sdim 170243791Sdim Exprs[i] = Result.take(); 171243791Sdim InputConstraintInfos.push_back(Info); 172252723Sdim 173252723Sdim const Type *Ty = Exprs[i]->getType().getTypePtr(); 174252723Sdim if (Ty->isDependentType()) 175252723Sdim continue; 176252723Sdim 177252723Sdim if (!Ty->isVoidType() || !Info.allowsMemory()) 178252723Sdim if (RequireCompleteType(InputExpr->getLocStart(), Exprs[i]->getType(), 179252723Sdim diag::err_dereference_incomplete_type)) 180252723Sdim return StmtError(); 181252723Sdim 182252723Sdim unsigned Size = Context.getTypeSize(Ty); 183252723Sdim if (!Context.getTargetInfo().validateInputSize(Literal->getString(), 184252723Sdim Size)) 185252723Sdim return StmtError(Diag(InputExpr->getLocStart(), 186252723Sdim diag::err_asm_invalid_input_size) 187252723Sdim << Info.getConstraintStr()); 188243791Sdim } 189243791Sdim 190243791Sdim // Check that the clobbers are valid. 191243791Sdim for (unsigned i = 0; i != NumClobbers; i++) { 192243791Sdim StringLiteral *Literal = Clobbers[i]; 193243791Sdim if (!Literal->isAscii()) 194243791Sdim return StmtError(Diag(Literal->getLocStart(),diag::err_asm_wide_character) 195243791Sdim << Literal->getSourceRange()); 196243791Sdim 197243791Sdim StringRef Clobber = Literal->getString(); 198243791Sdim 199243791Sdim if (!Context.getTargetInfo().isValidClobber(Clobber)) 200243791Sdim return StmtError(Diag(Literal->getLocStart(), 201243791Sdim diag::err_asm_unknown_register_name) << Clobber); 202243791Sdim } 203243791Sdim 204243791Sdim GCCAsmStmt *NS = 205243791Sdim new (Context) GCCAsmStmt(Context, AsmLoc, IsSimple, IsVolatile, NumOutputs, 206263509Sdim NumInputs, Names, Constraints, Exprs.data(), 207263509Sdim AsmString, NumClobbers, Clobbers, RParenLoc); 208243791Sdim // Validate the asm string, ensuring it makes sense given the operands we 209243791Sdim // have. 210243791Sdim SmallVector<GCCAsmStmt::AsmStringPiece, 8> Pieces; 211243791Sdim unsigned DiagOffs; 212243791Sdim if (unsigned DiagID = NS->AnalyzeAsmString(Pieces, Context, DiagOffs)) { 213243791Sdim Diag(getLocationOfStringLiteralByte(AsmString, DiagOffs), DiagID) 214243791Sdim << AsmString->getSourceRange(); 215243791Sdim return StmtError(); 216243791Sdim } 217243791Sdim 218243791Sdim // Validate constraints and modifiers. 219243791Sdim for (unsigned i = 0, e = Pieces.size(); i != e; ++i) { 220243791Sdim GCCAsmStmt::AsmStringPiece &Piece = Pieces[i]; 221243791Sdim if (!Piece.isOperand()) continue; 222243791Sdim 223243791Sdim // Look for the correct constraint index. 224243791Sdim unsigned Idx = 0; 225243791Sdim unsigned ConstraintIdx = 0; 226243791Sdim for (unsigned i = 0, e = NS->getNumOutputs(); i != e; ++i, ++ConstraintIdx) { 227243791Sdim TargetInfo::ConstraintInfo &Info = OutputConstraintInfos[i]; 228243791Sdim if (Idx == Piece.getOperandNo()) 229243791Sdim break; 230243791Sdim ++Idx; 231243791Sdim 232243791Sdim if (Info.isReadWrite()) { 233243791Sdim if (Idx == Piece.getOperandNo()) 234243791Sdim break; 235243791Sdim ++Idx; 236243791Sdim } 237243791Sdim } 238243791Sdim 239243791Sdim for (unsigned i = 0, e = NS->getNumInputs(); i != e; ++i, ++ConstraintIdx) { 240243791Sdim TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 241243791Sdim if (Idx == Piece.getOperandNo()) 242243791Sdim break; 243243791Sdim ++Idx; 244243791Sdim 245243791Sdim if (Info.isReadWrite()) { 246243791Sdim if (Idx == Piece.getOperandNo()) 247243791Sdim break; 248243791Sdim ++Idx; 249243791Sdim } 250243791Sdim } 251243791Sdim 252243791Sdim // Now that we have the right indexes go ahead and check. 253243791Sdim StringLiteral *Literal = Constraints[ConstraintIdx]; 254243791Sdim const Type *Ty = Exprs[ConstraintIdx]->getType().getTypePtr(); 255243791Sdim if (Ty->isDependentType() || Ty->isIncompleteType()) 256243791Sdim continue; 257243791Sdim 258243791Sdim unsigned Size = Context.getTypeSize(Ty); 259243791Sdim if (!Context.getTargetInfo() 260243791Sdim .validateConstraintModifier(Literal->getString(), Piece.getModifier(), 261243791Sdim Size)) 262243791Sdim Diag(Exprs[ConstraintIdx]->getLocStart(), 263243791Sdim diag::warn_asm_mismatched_size_modifier); 264243791Sdim } 265243791Sdim 266243791Sdim // Validate tied input operands for type mismatches. 267243791Sdim for (unsigned i = 0, e = InputConstraintInfos.size(); i != e; ++i) { 268243791Sdim TargetInfo::ConstraintInfo &Info = InputConstraintInfos[i]; 269243791Sdim 270243791Sdim // If this is a tied constraint, verify that the output and input have 271243791Sdim // either exactly the same type, or that they are int/ptr operands with the 272243791Sdim // same size (int/long, int*/long, are ok etc). 273243791Sdim if (!Info.hasTiedOperand()) continue; 274243791Sdim 275243791Sdim unsigned TiedTo = Info.getTiedOperand(); 276243791Sdim unsigned InputOpNo = i+NumOutputs; 277243791Sdim Expr *OutputExpr = Exprs[TiedTo]; 278243791Sdim Expr *InputExpr = Exprs[InputOpNo]; 279243791Sdim 280243791Sdim if (OutputExpr->isTypeDependent() || InputExpr->isTypeDependent()) 281243791Sdim continue; 282243791Sdim 283243791Sdim QualType InTy = InputExpr->getType(); 284243791Sdim QualType OutTy = OutputExpr->getType(); 285243791Sdim if (Context.hasSameType(InTy, OutTy)) 286243791Sdim continue; // All types can be tied to themselves. 287243791Sdim 288243791Sdim // Decide if the input and output are in the same domain (integer/ptr or 289243791Sdim // floating point. 290243791Sdim enum AsmDomain { 291243791Sdim AD_Int, AD_FP, AD_Other 292243791Sdim } InputDomain, OutputDomain; 293243791Sdim 294243791Sdim if (InTy->isIntegerType() || InTy->isPointerType()) 295243791Sdim InputDomain = AD_Int; 296243791Sdim else if (InTy->isRealFloatingType()) 297243791Sdim InputDomain = AD_FP; 298243791Sdim else 299243791Sdim InputDomain = AD_Other; 300243791Sdim 301243791Sdim if (OutTy->isIntegerType() || OutTy->isPointerType()) 302243791Sdim OutputDomain = AD_Int; 303243791Sdim else if (OutTy->isRealFloatingType()) 304243791Sdim OutputDomain = AD_FP; 305243791Sdim else 306243791Sdim OutputDomain = AD_Other; 307243791Sdim 308243791Sdim // They are ok if they are the same size and in the same domain. This 309243791Sdim // allows tying things like: 310243791Sdim // void* to int* 311243791Sdim // void* to int if they are the same size. 312243791Sdim // double to long double if they are the same size. 313243791Sdim // 314243791Sdim uint64_t OutSize = Context.getTypeSize(OutTy); 315243791Sdim uint64_t InSize = Context.getTypeSize(InTy); 316243791Sdim if (OutSize == InSize && InputDomain == OutputDomain && 317243791Sdim InputDomain != AD_Other) 318243791Sdim continue; 319243791Sdim 320243791Sdim // If the smaller input/output operand is not mentioned in the asm string, 321243791Sdim // then we can promote the smaller one to a larger input and the asm string 322243791Sdim // won't notice. 323243791Sdim bool SmallerValueMentioned = false; 324243791Sdim 325243791Sdim // If this is a reference to the input and if the input was the smaller 326243791Sdim // one, then we have to reject this asm. 327243791Sdim if (isOperandMentioned(InputOpNo, Pieces)) { 328243791Sdim // This is a use in the asm string of the smaller operand. Since we 329243791Sdim // codegen this by promoting to a wider value, the asm will get printed 330243791Sdim // "wrong". 331243791Sdim SmallerValueMentioned |= InSize < OutSize; 332243791Sdim } 333243791Sdim if (isOperandMentioned(TiedTo, Pieces)) { 334243791Sdim // If this is a reference to the output, and if the output is the larger 335243791Sdim // value, then it's ok because we'll promote the input to the larger type. 336243791Sdim SmallerValueMentioned |= OutSize < InSize; 337243791Sdim } 338243791Sdim 339243791Sdim // If the smaller value wasn't mentioned in the asm string, and if the 340243791Sdim // output was a register, just extend the shorter one to the size of the 341243791Sdim // larger one. 342243791Sdim if (!SmallerValueMentioned && InputDomain != AD_Other && 343243791Sdim OutputConstraintInfos[TiedTo].allowsRegister()) 344243791Sdim continue; 345243791Sdim 346243791Sdim // Either both of the operands were mentioned or the smaller one was 347243791Sdim // mentioned. One more special case that we'll allow: if the tied input is 348243791Sdim // integer, unmentioned, and is a constant, then we'll allow truncating it 349243791Sdim // down to the size of the destination. 350243791Sdim if (InputDomain == AD_Int && OutputDomain == AD_Int && 351243791Sdim !isOperandMentioned(InputOpNo, Pieces) && 352243791Sdim InputExpr->isEvaluatable(Context)) { 353243791Sdim CastKind castKind = 354243791Sdim (OutTy->isBooleanType() ? CK_IntegralToBoolean : CK_IntegralCast); 355243791Sdim InputExpr = ImpCastExprToType(InputExpr, OutTy, castKind).take(); 356243791Sdim Exprs[InputOpNo] = InputExpr; 357243791Sdim NS->setInputExpr(i, InputExpr); 358243791Sdim continue; 359243791Sdim } 360243791Sdim 361243791Sdim Diag(InputExpr->getLocStart(), 362243791Sdim diag::err_asm_tying_incompatible_types) 363243791Sdim << InTy << OutTy << OutputExpr->getSourceRange() 364243791Sdim << InputExpr->getSourceRange(); 365243791Sdim return StmtError(); 366243791Sdim } 367243791Sdim 368243791Sdim return Owned(NS); 369243791Sdim} 370243791Sdim 371252723SdimExprResult Sema::LookupInlineAsmIdentifier(CXXScopeSpec &SS, 372252723Sdim SourceLocation TemplateKWLoc, 373252723Sdim UnqualifiedId &Id, 374252723Sdim InlineAsmIdentifierInfo &Info, 375252723Sdim bool IsUnevaluatedContext) { 376252723Sdim Info.clear(); 377243791Sdim 378252723Sdim if (IsUnevaluatedContext) 379252723Sdim PushExpressionEvaluationContext(UnevaluatedAbstract, 380252723Sdim ReuseLambdaContextDecl); 381243791Sdim 382252723Sdim ExprResult Result = ActOnIdExpression(getCurScope(), SS, TemplateKWLoc, Id, 383252723Sdim /*trailing lparen*/ false, 384263509Sdim /*is & operand*/ false, 385263509Sdim /*CorrectionCandidateCallback=*/0, 386263509Sdim /*IsInlineAsmIdentifier=*/ true); 387243791Sdim 388252723Sdim if (IsUnevaluatedContext) 389252723Sdim PopExpressionEvaluationContext(); 390243791Sdim 391252723Sdim if (!Result.isUsable()) return Result; 392243791Sdim 393252723Sdim Result = CheckPlaceholderExpr(Result.take()); 394252723Sdim if (!Result.isUsable()) return Result; 395243791Sdim 396252723Sdim QualType T = Result.get()->getType(); 397243791Sdim 398252723Sdim // For now, reject dependent types. 399252723Sdim if (T->isDependentType()) { 400252723Sdim Diag(Id.getLocStart(), diag::err_asm_incomplete_type) << T; 401252723Sdim return ExprError(); 402243791Sdim } 403243791Sdim 404252723Sdim // Any sort of function type is fine. 405252723Sdim if (T->isFunctionType()) { 406252723Sdim return Result; 407243791Sdim } 408243791Sdim 409252723Sdim // Otherwise, it needs to be a complete type. 410252723Sdim if (RequireCompleteExprType(Result.get(), diag::err_asm_incomplete_type)) { 411252723Sdim return ExprError(); 412243791Sdim } 413243791Sdim 414252723Sdim // Compute the type size (and array length if applicable?). 415252723Sdim Info.Type = Info.Size = Context.getTypeSizeInChars(T).getQuantity(); 416252723Sdim if (T->isArrayType()) { 417252723Sdim const ArrayType *ATy = Context.getAsArrayType(T); 418252723Sdim Info.Type = Context.getTypeSizeInChars(ATy->getElementType()).getQuantity(); 419252723Sdim Info.Length = Info.Size / Info.Type; 420243791Sdim } 421243791Sdim 422252723Sdim // We can work with the expression as long as it's not an r-value. 423252723Sdim if (!Result.get()->isRValue()) 424252723Sdim Info.IsVarDecl = true; 425243791Sdim 426252723Sdim return Result; 427243791Sdim} 428243791Sdim 429243791Sdimbool Sema::LookupInlineAsmField(StringRef Base, StringRef Member, 430243791Sdim unsigned &Offset, SourceLocation AsmLoc) { 431243791Sdim Offset = 0; 432243791Sdim LookupResult BaseResult(*this, &Context.Idents.get(Base), SourceLocation(), 433243791Sdim LookupOrdinaryName); 434243791Sdim 435243791Sdim if (!LookupName(BaseResult, getCurScope())) 436243791Sdim return true; 437243791Sdim 438243791Sdim if (!BaseResult.isSingleResult()) 439243791Sdim return true; 440243791Sdim 441252723Sdim const RecordType *RT = 0; 442243791Sdim NamedDecl *FoundDecl = BaseResult.getFoundDecl(); 443252723Sdim if (VarDecl *VD = dyn_cast<VarDecl>(FoundDecl)) 444243791Sdim RT = VD->getType()->getAs<RecordType>(); 445252723Sdim else if (TypedefDecl *TD = dyn_cast<TypedefDecl>(FoundDecl)) 446243791Sdim RT = TD->getUnderlyingType()->getAs<RecordType>(); 447243791Sdim if (!RT) 448243791Sdim return true; 449243791Sdim 450243791Sdim if (RequireCompleteType(AsmLoc, QualType(RT, 0), 0)) 451243791Sdim return true; 452243791Sdim 453243791Sdim LookupResult FieldResult(*this, &Context.Idents.get(Member), SourceLocation(), 454243791Sdim LookupMemberName); 455243791Sdim 456243791Sdim if (!LookupQualifiedName(FieldResult, RT->getDecl())) 457243791Sdim return true; 458243791Sdim 459243791Sdim // FIXME: Handle IndirectFieldDecl? 460243791Sdim FieldDecl *FD = dyn_cast<FieldDecl>(FieldResult.getFoundDecl()); 461243791Sdim if (!FD) 462243791Sdim return true; 463243791Sdim 464243791Sdim const ASTRecordLayout &RL = Context.getASTRecordLayout(RT->getDecl()); 465243791Sdim unsigned i = FD->getFieldIndex(); 466243791Sdim CharUnits Result = Context.toCharUnitsFromBits(RL.getFieldOffset(i)); 467243791Sdim Offset = (unsigned)Result.getQuantity(); 468243791Sdim 469243791Sdim return false; 470243791Sdim} 471243791Sdim 472243791SdimStmtResult Sema::ActOnMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc, 473252723Sdim ArrayRef<Token> AsmToks, 474252723Sdim StringRef AsmString, 475252723Sdim unsigned NumOutputs, unsigned NumInputs, 476252723Sdim ArrayRef<StringRef> Constraints, 477252723Sdim ArrayRef<StringRef> Clobbers, 478252723Sdim ArrayRef<Expr*> Exprs, 479252723Sdim SourceLocation EndLoc) { 480252723Sdim bool IsSimple = (NumOutputs != 0 || NumInputs != 0); 481243791Sdim MSAsmStmt *NS = 482243791Sdim new (Context) MSAsmStmt(Context, AsmLoc, LBraceLoc, IsSimple, 483243791Sdim /*IsVolatile*/ true, AsmToks, NumOutputs, NumInputs, 484252723Sdim Constraints, Exprs, AsmString, 485252723Sdim Clobbers, EndLoc); 486243791Sdim return Owned(NS); 487243791Sdim} 488