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22 lines
578 B
LLVM
22 lines
578 B
LLVM
; RUN: opt -reassociate -S < %s | FileCheck %s
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; PR21205
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@a = common global i32 0, align 4
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@b = common global i32 0, align 4
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; Don't canonicalize %conv - undef into %conv + (-undef).
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; CHECK-LABEL: @test1
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; CHECK: %sub = fsub fast float %conv, undef
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; CHECK: %sub1 = fadd fast float %sub, -1.000000e+00
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define i32 @test1() {
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entry:
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%0 = load i32, i32* @a, align 4
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%conv = sitofp i32 %0 to float
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%sub = fsub fast float %conv, undef
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%sub1 = fadd fast float %sub, -1.000000e+00
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%conv2 = fptosi float %sub1 to i32
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store i32 %conv2, i32* @b, align 4
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ret i32 undef
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}
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