1; RUN: opt < %s -reassociate -S | FileCheck %s
2
3define i64 @multistep1(i64 %a, i64 %b, i64 %c) {
4; Check that a*a*b+a*a*c is turned into a*(a*(b+c)).
5; CHECK-LABEL: @multistep1(
6  %t0 = mul i64 %a, %b
7  %t1 = mul i64 %a, %t0 ; a*(a*b)
8  %t2 = mul i64 %a, %c
9  %t3 = mul i64 %a, %t2 ; a*(a*c)
10  %t4 = add i64 %t1, %t3
11; CHECK-NEXT: [[TMP1:%tmp.*]] = add i64 %c, %b
12; CHECK-NEXT: [[TMP2:%tmp.*]] = mul i64 %a, %a
13; CHECK-NEXT: mul i64 [[TMP2]], [[TMP1]]
14; CHECK-NEXT: ret
15  ret i64 %t4
16}
17
18define i64 @multistep2(i64 %a, i64 %b, i64 %c, i64 %d) {
19; Check that a*b+a*c+d is turned into a*(b+c)+d.
20; CHECK-LABEL: @multistep2(
21  %t0 = mul i64 %a, %b
22  %t1 = mul i64 %a, %c
23  %t2 = add i64 %t1, %d ; a*c+d
24  %t3 = add i64 %t0, %t2 ; a*b+(a*c+d)
25; CHECK-NEXT: add i64 %c, %b
26; CHECK-NEXT: mul i64 %tmp{{.*}}, %a
27; CHECK-NEXT: add i64 %tmp{{.*}}, %d
28; CHECK-NEXT: ret
29  ret i64 %t3
30}
31