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| author | Sanjay Patel <spatel@rotateright.com> | 2018-11-06 15:58:57 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2018-11-06 15:58:57 +0000 |
| commit | 2fd5b0ebfba459c6cfb24f111d2cdd4959269d12 (patch) | |
| tree | fdd4308a06a94230946c543f1def21106341077b /llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp | |
| parent | b3fbba6d15d35b0890578a7fa0783c23de6e8b9e (diff) | |
| download | bcm5719-llvm-2fd5b0ebfba459c6cfb24f111d2cdd4959269d12.tar.gz bcm5719-llvm-2fd5b0ebfba459c6cfb24f111d2cdd4959269d12.zip | |
[InstCombine] propagate fast-math-flags when folding fcmp+fneg, part 2
llvm-svn: 346238
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp index 975cb83b8f3..c1c904b331a 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -5467,9 +5467,10 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) { Value *X, *Y; if (match(Op0, m_FNeg(m_Value(X)))) { if (match(Op1, m_FNeg(m_Value(Y)))) { - // FIXME: Drops FMF. // fcmp pred (fneg X), (fneg Y) -> fcmp swap(pred) X, Y - return new FCmpInst(I.getSwappedPredicate(), X, Y); + Instruction *NewFCmp = new FCmpInst(I.getSwappedPredicate(), X, Y); + NewFCmp->copyFastMathFlags(&I); + return NewFCmp; } Constant *C; |
