1 ; RUN: opt < %s -reassociate -S | FileCheck %s
3 ; When there is nothing to do, or not much to do, check that reassociate leaves
8 define void @test1(i32 %a, i32 %b) {
9 ; Shouldn't change or move any of the add instructions. Should commute but
10 ; otherwise not change or move any of the mul instructions.
11 ; CHECK-LABEL: @test1(
12 %a0 = add nsw i32 %a, 1
13 ; CHECK-NEXT: %a0 = add nsw i32 %a, 1
14 %m0 = mul nsw i32 3, %a
15 ; CHECK-NEXT: %m0 = mul nsw i32 %a, 3
16 %a1 = add nsw i32 %a0, %b
17 ; CHECK-NEXT: %a1 = add nsw i32 %a0, %b
18 %m1 = mul nsw i32 %b, %m0
19 ; CHECK-NEXT: %m1 = mul nsw i32 %m0, %b
20 call void @use(i32 %a1)
21 ; CHECK-NEXT: call void @use
22 call void @use(i32 %m1)
26 define void @test2(i32 %a, i32 %b, i32 %c, i32 %d) {
27 ; The initial add doesn't change so should not lose the nsw flag.
28 ; CHECK-LABEL: @test2(
29 %a0 = add nsw i32 %b, %a
30 ; CHECK-NEXT: %a0 = add nsw i32 %b, %a
31 %a1 = add nsw i32 %a0, %d
32 ; CHECK-NEXT: %a1 = add i32 %a0, %c
33 %a2 = add nsw i32 %a1, %c
34 ; CHECK-NEXT: %a2 = add i32 %a1, %d
35 call void @use(i32 %a2)
36 ; CHECK-NEXT: call void @use