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-rw-r--r--llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 2eba5fe..bf15894 100644
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -1033,6 +1033,10 @@ Value *LibCallSimplifier::optimizeBinaryDoubleFP(CallInst *CI, IRBuilder<> &B) {
if (V2 == nullptr)
return nullptr;
+ // Propagate fast-math flags from the existing call to the new call.
+ IRBuilder<>::FastMathFlagGuard Guard(B);
+ B.SetFastMathFlags(CI->getFastMathFlags());
+
// fmin((double)floatval1, (double)floatval2)
// -> (double)fminf(floatval1, floatval2)
// TODO: Handle intrinsics in the same way as in optimizeUnaryDoubleFP().