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:
10 ; Iff: isPowerOf2(C + 1)
13 ; ============================================================================ ;
14 ; Basic positive tests
15 ; ============================================================================ ;
17 define i1 @p0(i8 %x) {
19 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X:%.*]], 3
20 ; CHECK-NEXT: ret i1 [[TMP1]]
23 %ret = icmp ne i8 %tmp0, %x
27 define i1 @pv(i8 %x, i8 %y) {
29 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
30 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 [[TMP0]], [[X:%.*]]
31 ; CHECK-NEXT: ret i1 [[TMP1]]
33 %tmp0 = lshr i8 -1, %y
34 %tmp1 = and i8 %tmp0, %x
35 %ret = icmp ne i8 %tmp1, %x
39 ; ============================================================================ ;
41 ; ============================================================================ ;
43 define <2 x i1> @p1_vec_splat(<2 x i8> %x) {
44 ; CHECK-LABEL: @p1_vec_splat(
45 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt <2 x i8> [[X:%.*]], <i8 3, i8 3>
46 ; CHECK-NEXT: ret <2 x i1> [[TMP1]]
48 %tmp0 = and <2 x i8> %x, <i8 3, i8 3>
49 %ret = icmp ne <2 x i8> %tmp0, %x
53 define <2 x i1> @p2_vec_nonsplat(<2 x i8> %x) {
54 ; CHECK-LABEL: @p2_vec_nonsplat(
55 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt <2 x i8> [[X:%.*]], <i8 3, i8 15>
56 ; CHECK-NEXT: ret <2 x i1> [[TMP1]]
58 %tmp0 = and <2 x i8> %x, <i8 3, i8 15> ; doesn't have to be splat.
59 %ret = icmp ne <2 x i8> %tmp0, %x
63 define <2 x i1> @p2_vec_nonsplat_edgecase0(<2 x i8> %x) {
64 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(
65 ; CHECK-NEXT: [[TMP0:%.*]] = and <2 x i8> [[X:%.*]], <i8 3, i8 0>
66 ; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i8> [[TMP0]], [[X]]
67 ; CHECK-NEXT: ret <2 x i1> [[RET]]
69 %tmp0 = and <2 x i8> %x, <i8 3, i8 0>
70 %ret = icmp ne <2 x i8> %tmp0, %x
73 define <2 x i1> @p2_vec_nonsplat_edgecase1(<2 x i8> %x) {
74 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase1(
75 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt <2 x i8> [[X:%.*]], <i8 3, i8 -1>
76 ; CHECK-NEXT: ret <2 x i1> [[TMP1]]
78 %tmp0 = and <2 x i8> %x, <i8 3, i8 -1>
79 %ret = icmp ne <2 x i8> %tmp0, %x
83 define <3 x i1> @p3_vec_splat_undef(<3 x i8> %x) {
84 ; CHECK-LABEL: @p3_vec_splat_undef(
85 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt <3 x i8> [[X:%.*]], <i8 3, i8 3, i8 3>
86 ; CHECK-NEXT: ret <3 x i1> [[TMP1]]
88 %tmp0 = and <3 x i8> %x, <i8 3, i8 undef, i8 3>
89 %ret = icmp ne <3 x i8> %tmp0, %x
93 define <3 x i1> @p3_vec_nonsplat_undef(<3 x i8> %x) {
94 ; CHECK-LABEL: @p3_vec_nonsplat_undef(
95 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt <3 x i8> [[X:%.*]], <i8 -1, i8 -1, i8 3>
96 ; CHECK-NEXT: ret <3 x i1> [[TMP1]]
98 %tmp0 = and <3 x i8> %x, <i8 -1, i8 undef, i8 3>
99 %ret = icmp ne <3 x i8> %tmp0, %x
103 ; ============================================================================ ;
104 ; Commutativity tests.
105 ; ============================================================================ ;
111 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
112 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X]], 3
113 ; CHECK-NEXT: ret i1 [[TMP1]]
117 %ret = icmp ne i8 %x, %tmp0 ; swapped order
121 ; ============================================================================ ;
122 ; Commutativity tests with variable
123 ; ============================================================================ ;
125 define i1 @cv0(i8 %y) {
127 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
128 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
129 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X]], [[TMP0]]
130 ; CHECK-NEXT: ret i1 [[TMP1]]
133 %tmp0 = lshr i8 -1, %y
134 %tmp1 = and i8 %x, %tmp0 ; swapped order
135 %ret = icmp ne i8 %tmp1, %x
139 define i1 @cv1(i8 %y) {
141 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
142 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
143 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X]], [[TMP0]]
144 ; CHECK-NEXT: ret i1 [[TMP1]]
147 %tmp0 = lshr i8 -1, %y
148 %tmp1 = and i8 %tmp0, %x
149 %ret = icmp ne i8 %x, %tmp1 ; swapped order
153 define i1 @cv2(i8 %y) {
155 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
156 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
157 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X]], [[TMP0]]
158 ; CHECK-NEXT: ret i1 [[TMP1]]
161 %tmp0 = lshr i8 -1, %y
162 %tmp1 = and i8 %x, %tmp0 ; swapped order
163 %ret = icmp ne i8 %x, %tmp1 ; swapped order
167 ; ============================================================================ ;
168 ; One-use tests. We don't care about multi-uses here.
169 ; ============================================================================ ;
171 declare void @use8(i8)
173 define i1 @oneuse0(i8 %x) {
174 ; CHECK-LABEL: @oneuse0(
175 ; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X:%.*]], 3
176 ; CHECK-NEXT: call void @use8(i8 [[TMP0]])
177 ; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[X]], 3
178 ; CHECK-NEXT: ret i1 [[TMP1]]
181 call void @use8(i8 %tmp0)
182 %ret = icmp ne i8 %tmp0, %x
186 ; ============================================================================ ;
188 ; ============================================================================ ;
190 define i1 @n0(i8 %x) {
192 ; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X:%.*]], 4
193 ; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[TMP0]], [[X]]
194 ; CHECK-NEXT: ret i1 [[RET]]
196 %tmp0 = and i8 %x, 4 ; power-of-two, but invalid.
197 %ret = icmp ne i8 %tmp0, %x
201 define i1 @n1(i8 %x, i8 %y, i8 %notx) {
203 ; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X:%.*]], 3
204 ; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[TMP0]], [[NOTX:%.*]]
205 ; CHECK-NEXT: ret i1 [[RET]]
208 %ret = icmp ne i8 %tmp0, %notx ; not %x
212 define <2 x i1> @n2(<2 x i8> %x) {
214 ; CHECK-NEXT: [[TMP0:%.*]] = and <2 x i8> [[X:%.*]], <i8 3, i8 16>
215 ; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i8> [[TMP0]], [[X]]
216 ; CHECK-NEXT: ret <2 x i1> [[RET]]
218 %tmp0 = and <2 x i8> %x, <i8 3, i8 16> ; only the first one is valid.
219 %ret = icmp ne <2 x i8> %tmp0, %x