1; RUN: opt < %s -reassociate -S | FileCheck %s
2
3define float @fmultistep1(float %a, float %b, float %c) {
4; Check that a*a*b+a*a*c is turned into a*(a*(b+c)).
5; CHECK-LABEL: @fmultistep1
6; CHECK-NEXT: fadd fast float %c, %b
7; CHECK-NEXT: fmul fast float %a, %tmp2
8; CHECK-NEXT: fmul fast float %tmp3, %a
9; CHECK-NEXT: ret float
10
11  %t0 = fmul fast float %a, %b
12  %t1 = fmul fast float %a, %t0 ; a*(a*b)
13  %t2 = fmul fast float %a, %c
14  %t3 = fmul fast float %a, %t2 ; a*(a*c)
15  %t4 = fadd fast float %t1, %t3
16  ret float %t4
17}
18
19define float @fmultistep2(float %a, float %b, float %c, float %d) {
20; Check that a*b+a*c+d is turned into a*(b+c)+d.
21; CHECK-LABEL: @fmultistep2
22; CHECK-NEXT: fadd fast float %c, %b
23; CHECK-NEXT: fmul fast float %tmp, %a
24; CHECK-NEXT: fadd fast float %tmp1, %d
25; CHECK-NEXT: ret float
26
27  %t0 = fmul fast float %a, %b
28  %t1 = fmul fast float %a, %c
29  %t2 = fadd fast float %t1, %d ; a*c+d
30  %t3 = fadd fast float %t0, %t2 ; a*b+(a*c+d)
31  ret float %t3
32}
33