1 ; RUN: opt < %s -reassociate -instcombine -S | FileCheck %s
3 define float @test1(float %A, float %B) {
5 ; CHECK-NEXT: [[Z:%.*]] = fadd fast float %A, %B
6 ; CHECK-NEXT: ret float [[Z]]
8 %W = fadd fast float %B, -5.0
9 %Y = fadd fast float %A, 5.0
10 %Z = fadd fast float %W, %Y
14 ; Check again using minimal subset of FMF.
15 ; Both 'reassoc' and 'nsz' are required.
16 define 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]]
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
27 ; Verify the fold is not done with only 'reassoc' ('nsz' is required).
28 define 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]]
35 %W = fadd reassoc float %B, -5.0
36 %Y = fadd reassoc float %A, 5.0
37 %Z = fadd reassoc float %W, %Y