diff options
Diffstat (limited to 'clang/lib')
| -rw-r--r-- | clang/lib/AST/ASTContext.cpp | 14 | ||||
| -rw-r--r-- | clang/lib/Sema/SemaChecking.cpp | 14 |
2 files changed, 25 insertions, 3 deletions
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp index f5e4b42d276..946d3df86c2 100644 --- a/clang/lib/AST/ASTContext.cpp +++ b/clang/lib/AST/ASTContext.cpp @@ -8030,3 +8030,17 @@ unsigned ASTContext::getParameterIndex(const ParmVarDecl *D) const { "ParmIndices lacks entry set by ParmVarDecl"); return I->second; } + +bool ASTContext::AtomicUsesUnsupportedLibcall(const AtomicExpr *E) const { + const llvm::Triple &T = getTargetInfo().getTriple(); + if (!T.isOSDarwin()) + return false; + + QualType AtomicTy = E->getPtr()->getType()->getPointeeType(); + CharUnits sizeChars = getTypeSizeInChars(AtomicTy); + uint64_t Size = sizeChars.getQuantity(); + CharUnits alignChars = getTypeAlignInChars(AtomicTy); + unsigned Align = alignChars.getQuantity(); + unsigned MaxInlineWidthInBits = getTargetInfo().getMaxAtomicInlineWidth(); + return (Size != Align || toBits(sizeChars) > MaxInlineWidthInBits); +} diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp index cdc546c4761..da24667804b 100644 --- a/clang/lib/Sema/SemaChecking.cpp +++ b/clang/lib/Sema/SemaChecking.cpp @@ -908,10 +908,18 @@ ExprResult Sema::SemaAtomicOpsOverloaded(ExprResult TheCallResult, SubExprs.push_back(TheCall->getArg(3)); // Weak break; } + + AtomicExpr *AE = new (Context) AtomicExpr(TheCall->getCallee()->getLocStart(), + SubExprs, ResultType, Op, + TheCall->getRParenLoc()); + + if ((Op == AtomicExpr::AO__c11_atomic_load || + (Op == AtomicExpr::AO__c11_atomic_store)) && + Context.AtomicUsesUnsupportedLibcall(AE)) + Diag(AE->getLocStart(), diag::err_atomic_load_store_uses_lib) << + ((Op == AtomicExpr::AO__c11_atomic_load) ? 0 : 1); - return Owned(new (Context) AtomicExpr(TheCall->getCallee()->getLocStart(), - SubExprs, ResultType, Op, - TheCall->getRParenLoc())); + return Owned(AE); } |
