From 15bff18c6f2c1e68f9b25110824e384115925461 Mon Sep 17 00:00:00 2001 From: Sanjay Patel Date: Mon, 13 Aug 2018 21:49:19 +0000 Subject: [SimplifyLibCalls] don't drop fast-math-flags on trig reflection folds (retry r339608) Even though this code is below a function called optimizeFloatingPointLibCall(), we apparently can't guarantee that we're dealing with FPMathOperators, so bail out immediately if that's not true. llvm-svn: 339618 --- llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'llvm/lib/Transforms') diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp index eda3f059e69..a2e5f8d00f6 100644 --- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp @@ -1124,7 +1124,12 @@ Value *LibCallSimplifier::optimizeCAbs(CallInst *CI, IRBuilder<> &B) { static Value *optimizeTrigReflections(CallInst *Call, LibFunc Func, IRBuilder<> &B) { - // FIXME: This drops FMF. + if (!isa(Call)) + return nullptr; + + IRBuilder<>::FastMathFlagGuard Guard(B); + B.setFastMathFlags(Call->getFastMathFlags()); + // TODO: Add tan() and other calls. // TODO: Can this be shared to also handle LLVM intrinsics? Value *X; -- cgit v1.2.3