1; RUN: opt < %s -reassociate -instcombine -S | FileCheck %s
2
3define float @test1(float %A, float %B) {
4; CHECK-LABEL: @test1(
5; CHECK-NEXT:    [[Z:%.*]] = fadd fast float %A, %B
6; CHECK-NEXT:    ret float [[Z]]
7;
8  %W = fadd fast float %B, -5.0
9  %Y = fadd fast float %A, 5.0
10  %Z = fadd fast float %W, %Y
11  ret float %Z
12}
13
14; Check again using minimal subset of FMF.
15; Both 'reassoc' and 'nsz' are required.
16define float @test1_reassoc_nsz(float %A, float %B) {
17; CHECK-LABEL: @test1_reassoc_nsz(
18; CHECK-NEXT:    [[Z:%.*]] = fadd reassoc nsz float %A, %B
19; CHECK-NEXT:    ret float [[Z]]
20;
21  %W = fadd reassoc nsz float %B, -5.0
22  %Y = fadd reassoc nsz float %A, 5.0
23  %Z = fadd reassoc nsz float %W, %Y
24  ret float %Z
25}
26
27; Verify the fold is not done with only 'reassoc' ('nsz' is required).
28define float @test1_reassoc(float %A, float %B) {
29; CHECK-LABEL: @test1_reassoc(
30; CHECK-NEXT:    [[W:%.*]] = fadd reassoc float %B, -5.000000e+00
31; CHECK-NEXT:    [[Y:%.*]] = fadd reassoc float %A, 5.000000e+00
32; CHECK-NEXT:    [[Z:%.*]] = fadd reassoc float [[Y]], [[W]]
33; CHECK-NEXT:    ret float [[Z]]
34;
35  %W = fadd reassoc float %B, -5.0
36  %Y = fadd reassoc float %A, 5.0
37  %Z = fadd reassoc float %W, %Y
38  ret float %Z
39}
40