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572717843f
attribute is not present. During my refactor in r251595 I changed the behavior of optimizeSqrt(), skipping the transformation if the function wasn't marked with unsafe-fp-math attribute. This fixed a bug, as confirmed by Sanjay (before the optimization was silently executed anyway), although it wasn't my primary aim. This commit adds a test to ensure the code doesn't break again. Reported by: Marcello Maggioni Discussed with: Sanjay Patel llvm-svn: 251747
26 lines
755 B
LLVM
26 lines
755 B
LLVM
; Check that we skip transformations if the attribute unsafe-fp-math
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; is not set.
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define float @mysqrt(float %x, float %y) #0 {
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entry:
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%x.addr = alloca float, align 4
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%y.addr = alloca float, align 4
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store float %x, float* %x.addr, align 4
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store float %y, float* %y.addr, align 4
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%0 = load float, float* %x.addr, align 4
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%1 = load float, float* %x.addr, align 4
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%mul = fmul fast float %0, %1
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%2 = call float @llvm.sqrt.f32(float %mul)
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ret float %2
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}
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declare float @llvm.sqrt.f32(float) #1
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; CHECK: define float @mysqrt(float %x, float %y) {
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; CHECK: entry:
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; CHECK: %mul = fmul fast float %x, %x
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; CHECK: %0 = call float @llvm.sqrt.f32(float %mul)
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; CHECK: ret float %0
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; CHECK: }
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