1 ; RUN: opt -reassociate %s -S | FileCheck %s
3 define float @foo(float %a,float %b, float %c) {
5 ; CHECK-NEXT: [[MUL3:%.*]] = fmul float %a, %b
6 ; CHECK-NEXT: [[FACTOR:%.*]] = fmul fast float %c, 2.000000e+00
7 ; CHECK-NEXT: [[REASS_ADD1:%.*]] = fadd fast float [[FACTOR]], %b
8 ; CHECK-NEXT: [[REASS_MUL:%.*]] = fmul fast float [[REASS_ADD1]], %a
9 ; CHECK-NEXT: [[ADD3:%.*]] = fadd fast float [[REASS_MUL]], [[MUL3]]
10 ; CHECK-NEXT: ret float [[ADD3]]
12 %mul1 = fmul fast float %a, %c
13 %mul2 = fmul fast float %a, %b
14 %mul3 = fmul float %a, %b ; STRICT
15 %mul4 = fmul fast float %a, %c
16 %add1 = fadd fast float %mul1, %mul3
17 %add2 = fadd fast float %mul4, %mul2
18 %add3 = fadd fast float %add1, %add2
22 define float @foo_reassoc(float %a,float %b, float %c) {
23 ; CHECK-LABEL: @foo_reassoc(
24 ; CHECK-NEXT: [[MUL1:%.*]] = fmul reassoc float %a, %c
25 ; CHECK-NEXT: [[MUL2:%.*]] = fmul fast float %b, %a
26 ; CHECK-NEXT: [[MUL3:%.*]] = fmul float %a, %b
27 ; CHECK-NEXT: [[MUL4:%.*]] = fmul reassoc float %a, %c
28 ; CHECK-NEXT: [[ADD1:%.*]] = fadd fast float [[MUL1]], [[MUL3]]
29 ; CHECK-NEXT: [[ADD2:%.*]] = fadd reassoc float [[MUL2]], [[MUL4]]
30 ; CHECK-NEXT: [[ADD3:%.*]] = fadd fast float [[ADD1]], [[ADD2]]
31 ; CHECK-NEXT: ret float [[ADD3]]
33 %mul1 = fmul reassoc float %a, %c
34 %mul2 = fmul fast float %a, %b
35 %mul3 = fmul float %a, %b ; STRICT
36 %mul4 = fmul reassoc float %a, %c
37 %add1 = fadd fast float %mul1, %mul3
38 %add2 = fadd reassoc float %mul4, %mul2
39 %add3 = fadd fast float %add1, %add2