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when A==B, -0.0 != +0.0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63474 91177308-0d34-0410-b5e6-96231b3b80d8
12 lines
391 B
LLVM
12 lines
391 B
LLVM
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse41 -o %t -f
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; RUN: grep xorps %t | count 1
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; Test that when we don't -enable-unsafe-fp-math, we don't do the optimization
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; -0 - (A - B) to (B - A) because A==B, -0 != 0
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define float @negfp(float %a, float %b) {
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entry:
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%sub = sub float %a, %b ; <float> [#uses=1]
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%neg = sub float -0.000000e+00, %sub ; <float> [#uses=1]
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ret float %neg
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} |