1 ; RUN: opt -reassociate -S < %s | FileCheck %s 2 ; PR21205 3 4 @a = common global i32 0, align 4 5 @b = common global i32 0, align 4 6 7 ; Don't canonicalize %conv - undef into %conv + (-undef). 8 ; CHECK-LABEL: @test1 9 ; CHECK: %sub = fsub fast float %conv, undef 10 ; CHECK: %sub1 = fadd fast float %sub, -1.000000e+00 11 12 define i32 @test1() { 13 entry: 14 %0 = load i32, i32* @a, align 4 15 %conv = sitofp i32 %0 to float 16 %sub = fsub fast float %conv, undef 17 %sub1 = fadd fast float %sub, -1.000000e+00 18 %conv2 = fptosi float %sub1 to i32 19 store i32 %conv2, i32* @b, align 4 20 ret i32 undef 21 } 22
