1*9880d681SAndroid Build Coastguard Worker; RUN: opt -reassociate -S < %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; PR21205 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker@a = common global i32 0, align 4 5*9880d681SAndroid Build Coastguard Worker@b = common global i32 0, align 4 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker; Don't canonicalize %conv - undef into %conv + (-undef). 8*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test1 9*9880d681SAndroid Build Coastguard Worker; CHECK: %sub = fsub fast float %conv, undef 10*9880d681SAndroid Build Coastguard Worker; CHECK: %sub1 = fadd fast float %sub, -1.000000e+00 11*9880d681SAndroid Build Coastguard Worker 12*9880d681SAndroid Build Coastguard Workerdefine i32 @test1() { 13*9880d681SAndroid Build Coastguard Workerentry: 14*9880d681SAndroid Build Coastguard Worker %0 = load i32, i32* @a, align 4 15*9880d681SAndroid Build Coastguard Worker %conv = sitofp i32 %0 to float 16*9880d681SAndroid Build Coastguard Worker %sub = fsub fast float %conv, undef 17*9880d681SAndroid Build Coastguard Worker %sub1 = fadd fast float %sub, -1.000000e+00 18*9880d681SAndroid Build Coastguard Worker %conv2 = fptosi float %sub1 to i32 19*9880d681SAndroid Build Coastguard Worker store i32 %conv2, i32* @b, align 4 20*9880d681SAndroid Build Coastguard Worker ret i32 undef 21*9880d681SAndroid Build Coastguard Worker} 22