1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
define i32 @negate_nuw(i32 %x) {
; CHECK-LABEL: @negate_nuw(
; CHECK-NEXT: ret i32 0
;
%neg = sub nuw i32 0, %x
ret i32 %neg
}
define <2 x i32> @negate_nuw_vec(<2 x i32> %x) {
; CHECK-LABEL: @negate_nuw_vec(
; CHECK-NEXT: ret <2 x i32> zeroinitializer
;
%neg = sub nuw <2 x i32> zeroinitializer, %x
ret <2 x i32> %neg
}
define <2 x i32> @negate_nuw_vec_poison_elt(<2 x i32> %x) {
; CHECK-LABEL: @negate_nuw_vec_poison_elt(
; CHECK-NEXT: ret <2 x i32> zeroinitializer
;
%neg = sub nuw <2 x i32> <i32 0, i32 poison>, %x
ret <2 x i32> %neg
}
define i8 @negate_zero_or_minsigned_nsw(i8 %x) {
; CHECK-LABEL: @negate_zero_or_minsigned_nsw(
; CHECK-NEXT: ret i8 0
;
%signbit = and i8 %x, 128
%neg = sub nsw i8 0, %signbit
ret i8 %neg
}
define <2 x i8> @negate_zero_or_minsigned_nsw_vec(<2 x i8> %x) {
; CHECK-LABEL: @negate_zero_or_minsigned_nsw_vec(
; CHECK-NEXT: ret <2 x i8> zeroinitializer
;
%signbit = shl <2 x i8> %x, <i8 7, i8 7>
%neg = sub nsw <2 x i8> zeroinitializer, %signbit
ret <2 x i8> %neg
}
define <2 x i8> @negate_zero_or_minsigned_nsw_vec_poison_elt(<2 x i8> %x) {
; CHECK-LABEL: @negate_zero_or_minsigned_nsw_vec_poison_elt(
; CHECK-NEXT: ret <2 x i8> zeroinitializer
;
%signbit = shl <2 x i8> %x, <i8 7, i8 7>
%neg = sub nsw <2 x i8> <i8 poison, i8 0>, %signbit
ret <2 x i8> %neg
}
define i8 @negate_zero_or_minsigned(i8 %x) {
; CHECK-LABEL: @negate_zero_or_minsigned(
; CHECK-NEXT: [[SIGNBIT:%.*]] = shl i8 [[X:%.*]], 7
; CHECK-NEXT: ret i8 [[SIGNBIT]]
;
%signbit = shl i8 %x, 7
%neg = sub i8 0, %signbit
ret i8 %neg
}
define <2 x i8> @negate_zero_or_minsigned_vec(<2 x i8> %x) {
; CHECK-LABEL: @negate_zero_or_minsigned_vec(
; CHECK-NEXT: [[SIGNBIT:%.*]] = and <2 x i8> [[X:%.*]], splat (i8 -128)
; CHECK-NEXT: ret <2 x i8> [[SIGNBIT]]
;
%signbit = and <2 x i8> %x, <i8 128, i8 128>
%neg = sub <2 x i8> zeroinitializer, %signbit
ret <2 x i8> %neg
}
|
