1 ; RUN: opt < %s -reassociate -S | FileCheck %s
3 define 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: [[TMP1:%tmp.*]] = fadd fast float %c, %b
7 ; CHECK-NEXT: [[TMP2:%tmp.*]] = fmul fast float %a, %a
8 ; CHECK-NEXT: fmul fast float [[TMP2]], [[TMP1]]
9 ; CHECK-NEXT: ret float
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
19 define 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
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)