Update Clang to emit the new form of llvm.cttz and llvm.ctlz intrinsics,
setting the is_zero_undef flag appropriately to true as that matches the
semantics of these GCC builtins.
This is the Clang side of r146357 in LLVM.
llvm-svn: 146358
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 419dddd..ce86cc4 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -237,7 +237,7 @@
Value *F = CGM.getIntrinsic(Intrinsic::cttz, ArgType);
llvm::Type *ResultType = ConvertType(E->getType());
- Value *Result = Builder.CreateCall(F, ArgValue);
+ Value *Result = Builder.CreateCall2(F, ArgValue, Builder.getTrue());
if (Result->getType() != ResultType)
Result = Builder.CreateIntCast(Result, ResultType, /*isSigned*/true,
"cast");
@@ -252,7 +252,7 @@
Value *F = CGM.getIntrinsic(Intrinsic::ctlz, ArgType);
llvm::Type *ResultType = ConvertType(E->getType());
- Value *Result = Builder.CreateCall(F, ArgValue);
+ Value *Result = Builder.CreateCall2(F, ArgValue, Builder.getTrue());
if (Result->getType() != ResultType)
Result = Builder.CreateIntCast(Result, ResultType, /*isSigned*/true,
"cast");
@@ -268,7 +268,8 @@
Value *F = CGM.getIntrinsic(Intrinsic::cttz, ArgType);
llvm::Type *ResultType = ConvertType(E->getType());
- Value *Tmp = Builder.CreateAdd(Builder.CreateCall(F, ArgValue),
+ Value *Tmp = Builder.CreateAdd(Builder.CreateCall2(F, ArgValue,
+ Builder.getTrue()),
llvm::ConstantInt::get(ArgType, 1));
Value *Zero = llvm::Constant::getNullValue(ArgType);
Value *IsZero = Builder.CreateICmpEQ(ArgValue, Zero, "iszero");