diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp index 2551abef75b..dc074406014 100644 --- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp @@ -1164,9 +1164,12 @@ Value *LibCallSimplifier::optimizePow(CallInst *CI, IRBuilder<> &B) { LibFunc::fabsl)) { // In -ffast-math, pow(x, 0.5) -> sqrt(x). - if (UnsafeFPMath) + if (CI->hasUnsafeAlgebra()) { + IRBuilder<>::FastMathFlagGuard Guard(B); + B.setFastMathFlags(CI->getFastMathFlags()); return EmitUnaryFloatFnCall(Op1, TLI->getName(LibFunc::sqrt), B, Callee->getAttributes()); + } // Expand pow(x, 0.5) to (x == -infinity ? +infinity : fabs(sqrt(x))). // This is faster than calling pow, and still handles negative zero |
