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