diff options
Diffstat (limited to 'clang/lib/CodeGen/CGBuiltin.cpp')
| -rw-r--r-- | clang/lib/CodeGen/CGBuiltin.cpp | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp index c9a10a52d19..d9d1fd1041a 100644 --- a/clang/lib/CodeGen/CGBuiltin.cpp +++ b/clang/lib/CodeGen/CGBuiltin.cpp @@ -1516,6 +1516,35 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD, E->getArg(0), true); case Builtin::BI__noop: return RValue::get(nullptr); + case Builtin::BI_InterlockedExchange: + case Builtin::BI_InterlockedExchangePointer: + return EmitBinaryAtomic(*this, llvm::AtomicRMWInst::Xchg, E); + case Builtin::BI_InterlockedCompareExchangePointer: { + llvm::Type *RTy; + llvm::IntegerType *IntType = + IntegerType::get(getLLVMContext(), + getContext().getTypeSize(E->getType())); + llvm::Type *IntPtrType = IntType->getPointerTo(); + + llvm::Value *Destination = + Builder.CreateBitCast(EmitScalarExpr(E->getArg(0)), IntPtrType); + + llvm::Value *Exchange = EmitScalarExpr(E->getArg(1)); + RTy = Exchange->getType(); + Exchange = Builder.CreatePtrToInt(Exchange, IntType); + + llvm::Value *Comparand = + Builder.CreatePtrToInt(EmitScalarExpr(E->getArg(2)), IntType); + + auto Result = Builder.CreateAtomicCmpXchg(Destination, Comparand, Exchange, + SequentiallyConsistent, + SequentiallyConsistent); + Result->setVolatile(true); + + return RValue::get(Builder.CreateIntToPtr(Builder.CreateExtractValue(Result, + 0), + RTy)); + } case Builtin::BI_InterlockedCompareExchange: { AtomicCmpXchgInst *CXI = Builder.CreateAtomicCmpXchg( EmitScalarExpr(E->getArg(0)), |
