1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 ; https://bugs.llvm.org/show_bug.cgi?id=38123
8 ; Should be transformed into:
11 ; ============================================================================ ;
12 ; Basic positive tests
13 ; ============================================================================ ;
15 define i1 @p0(i8 %x, i8 %y) {
17 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
18 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[TMP0]], [[X:%.*]]
19 ; CHECK-NEXT: ret i1 [[TMP1]]
21 %tmp0 = lshr i8 -1, %y
22 %tmp1 = and i8 %tmp0, %x
23 %ret = icmp ne i8 %tmp1, %x
27 ; ============================================================================ ;
29 ; ============================================================================ ;
31 define <2 x i1> @p1_vec(<2 x i8> %x, <2 x i8> %y) {
32 ; CHECK-LABEL: @p1_vec(
33 ; CHECK-NEXT: [[TMP0:%.*]] = lshr <2 x i8> <i8 -1, i8 -1>, [[Y:%.*]]
34 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i8> [[TMP0]], [[X:%.*]]
35 ; CHECK-NEXT: ret <2 x i1> [[TMP1]]
37 %tmp0 = lshr <2 x i8> <i8 -1, i8 -1>, %y
38 %tmp1 = and <2 x i8> %tmp0, %x
39 %ret = icmp ne <2 x i8> %tmp1, %x
43 define <3 x i1> @p2_vec_undef(<3 x i8> %x, <3 x i8> %y) {
44 ; CHECK-LABEL: @p2_vec_undef(
45 ; CHECK-NEXT: [[TMP0:%.*]] = lshr <3 x i8> <i8 -1, i8 undef, i8 -1>, [[Y:%.*]]
46 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <3 x i8> [[TMP0]], [[X:%.*]]
47 ; CHECK-NEXT: ret <3 x i1> [[TMP1]]
49 %tmp0 = lshr <3 x i8> <i8 -1, i8 undef, i8 -1>, %y
50 %tmp1 = and <3 x i8> %tmp0, %x
51 %ret = icmp ne <3 x i8> %tmp1, %x
55 ; ============================================================================ ;
56 ; Commutativity tests.
57 ; ============================================================================ ;
61 define i1 @c0(i8 %y) {
63 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
64 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
65 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X]], [[TMP0]]
66 ; CHECK-NEXT: ret i1 [[TMP1]]
68 %tmp0 = lshr i8 -1, %y
70 %tmp1 = and i8 %x, %tmp0 ; swapped order
71 %ret = icmp ne i8 %tmp1, %x
75 define i1 @c1(i8 %y) {
77 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
78 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
79 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X]], [[TMP0]]
80 ; CHECK-NEXT: ret i1 [[TMP1]]
82 %tmp0 = lshr i8 -1, %y
84 %tmp1 = and i8 %tmp0, %x
85 %ret = icmp ne i8 %x, %tmp1 ; swapped order
89 define i1 @c2(i8 %y) {
91 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
92 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
93 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X]], [[TMP0]]
94 ; CHECK-NEXT: ret i1 [[TMP1]]
96 %tmp0 = lshr i8 -1, %y
98 %tmp1 = and i8 %x, %tmp0 ; swapped order
99 %ret = icmp ne i8 %x, %tmp1 ; swapped order
103 ; ============================================================================ ;
104 ; One-use tests. We don't care about multi-uses here.
105 ; ============================================================================ ;
107 declare void @use8(i8)
109 define i1 @oneuse0(i8 %x, i8 %y) {
110 ; CHECK-LABEL: @oneuse0(
111 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
112 ; CHECK-NEXT: call void @use8(i8 [[TMP0]])
113 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[TMP0]], [[X:%.*]]
114 ; CHECK-NEXT: ret i1 [[TMP1]]
116 %tmp0 = lshr i8 -1, %y
117 call void @use8(i8 %tmp0)
118 %tmp1 = and i8 %tmp0, %x
119 %ret = icmp ne i8 %tmp1, %x
123 define i1 @oneuse1(i8 %x, i8 %y) {
124 ; CHECK-LABEL: @oneuse1(
125 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
126 ; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[TMP0]], [[X:%.*]]
127 ; CHECK-NEXT: call void @use8(i8 [[TMP1]])
128 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[TMP0]], [[X]]
129 ; CHECK-NEXT: ret i1 [[TMP1]]
131 %tmp0 = lshr i8 -1, %y
132 %tmp1 = and i8 %tmp0, %x
133 call void @use8(i8 %tmp1)
134 %ret = icmp ne i8 %tmp1, %x
138 define i1 @oneuse2(i8 %x, i8 %y) {
139 ; CHECK-LABEL: @oneuse2(
140 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
141 ; CHECK-NEXT: call void @use8(i8 [[TMP0]])
142 ; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[TMP0]], [[X:%.*]]
143 ; CHECK-NEXT: call void @use8(i8 [[TMP1]])
144 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[TMP0]], [[X]]
145 ; CHECK-NEXT: ret i1 [[TMP1]]
147 %tmp0 = lshr i8 -1, %y
148 call void @use8(i8 %tmp0)
149 %tmp1 = and i8 %tmp0, %x
150 call void @use8(i8 %tmp1)
151 %ret = icmp ne i8 %tmp1, %x
155 ; ============================================================================ ;
157 ; ============================================================================ ;
159 define i1 @n0(i8 %x, i8 %y, i8 %notx) {
161 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
162 ; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[TMP0]], [[X:%.*]]
163 ; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[TMP1]], [[NOTX:%.*]]
164 ; CHECK-NEXT: ret i1 [[RET]]
166 %tmp0 = lshr i8 -1, %y
167 %tmp1 = and i8 %tmp0, %x
168 %ret = icmp ne i8 %tmp1, %notx ; not %x