diff options
| -rw-r--r-- | CodeGen/CGBuiltin.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/CodeGen/CGBuiltin.cpp b/CodeGen/CGBuiltin.cpp index 996978e138..661c09d7cd 100644 --- a/CodeGen/CGBuiltin.cpp +++ b/CodeGen/CGBuiltin.cpp @@ -149,6 +149,20 @@ RValue CodeGenFunction::EmitBuiltinExpr(unsigned BuiltinID, const CallExpr *E) { return RValue::get(Result); } + case Builtin::BI__builtin_ctz: + case Builtin::BI__builtin_ctzl: + case Builtin::BI__builtin_ctzll: { + Value *ArgValue = EmitScalarExpr(E->getArg(0)); + + const llvm::Type *ArgType = ArgValue->getType(); + Value *F = CGM.getIntrinsic(Intrinsic::cttz, &ArgType, 1); + + const llvm::Type *ResultType = ConvertType(E->getType()); + Value *Result = Builder.CreateCall(F, ArgValue, "tmp"); + if (Result->getType() != ResultType) + Result = Builder.CreateIntCast(Result, ResultType, "cast"); + return RValue::get(Result); + } case Builtin::BI__builtin_expect: return RValue::get(EmitScalarExpr(E->getArg(0))); case Builtin::BI__builtin_bswap32: |