| ; RUN: opt < %s -reassociate -S | FileCheck %s |
| |
| define float @fmultistep1(float %a, float %b, float %c) { |
| ; Check that a*a*b+a*a*c is turned into a*(a*(b+c)). |
| ; CHECK-LABEL: @fmultistep1 |
| ; CHECK-NEXT: [[TMP1:%tmp.*]] = fadd fast float %c, %b |
| ; CHECK-NEXT: [[TMP2:%tmp.*]] = fmul fast float %a, %a |
| ; CHECK-NEXT: fmul fast float [[TMP2]], [[TMP1]] |
| ; CHECK-NEXT: ret float |
| |
| %t0 = fmul fast float %a, %b |
| %t1 = fmul fast float %a, %t0 ; a*(a*b) |
| %t2 = fmul fast float %a, %c |
| %t3 = fmul fast float %a, %t2 ; a*(a*c) |
| %t4 = fadd fast float %t1, %t3 |
| ret float %t4 |
| } |
| |
| define float @fmultistep2(float %a, float %b, float %c, float %d) { |
| ; Check that a*b+a*c+d is turned into a*(b+c)+d. |
| ; CHECK-LABEL: @fmultistep2 |
| ; CHECK-NEXT: fadd fast float %c, %b |
| ; CHECK-NEXT: fmul fast float %tmp, %a |
| ; CHECK-NEXT: fadd fast float %tmp1, %d |
| ; CHECK-NEXT: ret float |
| |
| %t0 = fmul fast float %a, %b |
| %t1 = fmul fast float %a, %c |
| %t2 = fadd fast float %t1, %d ; a*c+d |
| %t3 = fadd fast float %t0, %t2 ; a*b+(a*c+d) |
| ret float %t3 |
| } |