1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -instsimplify -S | FileCheck %s
3
4define i32 @negate_nuw(i32 %x) {
5; CHECK-LABEL: @negate_nuw(
6; CHECK-NEXT:    ret i32 0
7;
8  %neg = sub nuw i32 0, %x
9  ret i32 %neg
10}
11
12define <2 x i32> @negate_nuw_vec(<2 x i32> %x) {
13; CHECK-LABEL: @negate_nuw_vec(
14; CHECK-NEXT:    ret <2 x i32> zeroinitializer
15;
16  %neg = sub nuw <2 x i32> zeroinitializer, %x
17  ret <2 x i32> %neg
18}
19
20define i8 @negate_zero_or_minsigned_nsw(i8 %x) {
21; CHECK-LABEL: @negate_zero_or_minsigned_nsw(
22; CHECK-NEXT:    ret i8 0
23;
24  %signbit = and i8 %x, 128
25  %neg = sub nsw i8 0, %signbit
26  ret i8 %neg
27}
28
29define <2 x i8> @negate_zero_or_minsigned_nsw_vec(<2 x i8> %x) {
30; CHECK-LABEL: @negate_zero_or_minsigned_nsw_vec(
31; CHECK-NEXT:    ret <2 x i8> zeroinitializer
32;
33  %signbit = shl <2 x i8> %x, <i8 7, i8 7>
34  %neg = sub nsw <2 x i8> zeroinitializer, %signbit
35  ret <2 x i8> %neg
36}
37
38define i8 @negate_zero_or_minsigned(i8 %x) {
39; CHECK-LABEL: @negate_zero_or_minsigned(
40; CHECK-NEXT:    [[SIGNBIT:%.*]] = shl i8 %x, 7
41; CHECK-NEXT:    ret i8 [[SIGNBIT]]
42;
43  %signbit = shl i8 %x, 7
44  %neg = sub i8 0, %signbit
45  ret i8 %neg
46}
47
48define <2 x i8> @negate_zero_or_minsigned_vec(<2 x i8> %x) {
49; CHECK-LABEL: @negate_zero_or_minsigned_vec(
50; CHECK-NEXT:    [[SIGNBIT:%.*]] = and <2 x i8> %x, <i8 -128, i8 -128>
51; CHECK-NEXT:    ret <2 x i8> [[SIGNBIT]]
52;
53  %signbit = and <2 x i8> %x, <i8 128, i8 128>
54  %neg = sub <2 x i8> zeroinitializer, %signbit
55  ret <2 x i8> %neg
56}
57
58