1; NOTE: Assertions have been autogenerated by update_test_checks.py
2; RUN: opt < %s -instcombine -S | FileCheck %s
3
4define void @hang_2002-03-11(i32 %X) {
5; CHECK-LABEL: @hang_2002-03-11(
6; CHECK-NEXT:    ret void
7;
8  %reg117 = add i32 %X, 0
9  ret void
10}
11
12; Instcombine was missing a test that caused it to make illegal transformations
13; sometimes. In this case, it transformed the sub into an add:
14
15define i32 @sub_failure_2002-05-14(i32 %i, i32 %j) {
16; CHECK-LABEL: @sub_failure_2002-05-14(
17; CHECK-NEXT:    [[A:%.*]] = mul i32 %i, %j
18; CHECK-NEXT:    [[B:%.*]] = sub i32 2, [[A]]
19; CHECK-NEXT:    ret i32 [[B]]
20;
21  %A = mul i32 %i, %j
22  %B = sub i32 2, %A
23  ret i32 %B
24}
25
26; This testcase was incorrectly getting completely eliminated. There should be
27; SOME instruction named %c here, even if it's a bitwise and.
28
29define i64 @cast_test_2002-08-02(i64 %A) {
30; CHECK-LABEL: @cast_test_2002-08-02(
31; CHECK-NEXT:    [[C2:%.*]] = and i64 %A, 255
32; CHECK-NEXT:    ret i64 [[C2]]
33;
34  %c1 = trunc i64 %A to i8
35  %c2 = zext i8 %c1 to i64
36  ret i64 %c2
37}
38
39define i32 @missed_const_prop_2002-12-05(i32 %A) {
40; CHECK-LABEL: @missed_const_prop_2002-12-05(
41; CHECK-NEXT:    ret i32 0
42;
43  %A.neg = sub i32 0, %A
44  %.neg = sub i32 0, 1
45  %X = add i32 %.neg, 1
46  %Y.neg.ra = add i32 %A, %X
47  %r = add i32 %A.neg, %Y.neg.ra
48  ret i32 %r
49}
50
51