1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -passes=instcombine -S | FileCheck %s
4 ; https://bugs.llvm.org/show_bug.cgi?id=38123
8 ; Should be transformed into:
10 ; Iff: isPowerOf2(C + 1)
14 declare <2 x i8> @gen2x8()
15 declare <3 x i8> @gen3x8()
17 ; ============================================================================ ;
18 ; Basic positive tests
19 ; ============================================================================ ;
23 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
24 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[X]], 3
25 ; CHECK-NEXT: ret i1 [[RET]]
29 %ret = icmp ugt i8 %x, %tmp0
33 define i1 @pv(i8 %y) {
35 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
36 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
37 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[X]], [[TMP0]]
38 ; CHECK-NEXT: ret i1 [[RET]]
41 %tmp0 = lshr i8 -1, %y
42 %tmp1 = and i8 %tmp0, %x
43 %ret = icmp ugt i8 %x, %tmp1
47 ; ============================================================================ ;
49 ; ============================================================================ ;
51 define <2 x i1> @p1_vec_splat() {
52 ; CHECK-LABEL: @p1_vec_splat(
53 ; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
54 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt <2 x i8> [[X]], splat (i8 3)
55 ; CHECK-NEXT: ret <2 x i1> [[RET]]
57 %x = call <2 x i8> @gen2x8()
58 %tmp0 = and <2 x i8> %x, <i8 3, i8 3>
59 %ret = icmp ugt <2 x i8> %x, %tmp0
63 define <2 x i1> @p2_vec_nonsplat() {
64 ; CHECK-LABEL: @p2_vec_nonsplat(
65 ; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
66 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt <2 x i8> [[X]], <i8 3, i8 15>
67 ; CHECK-NEXT: ret <2 x i1> [[RET]]
69 %x = call <2 x i8> @gen2x8()
70 %tmp0 = and <2 x i8> %x, <i8 3, i8 15> ; doesn't have to be splat.
71 %ret = icmp ugt <2 x i8> %x, %tmp0
75 define <2 x i1> @p2_vec_nonsplat_edgecase0() {
76 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(
77 ; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
78 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt <2 x i8> [[X]], <i8 3, i8 0>
79 ; CHECK-NEXT: ret <2 x i1> [[RET]]
81 %x = call <2 x i8> @gen2x8()
82 %tmp0 = and <2 x i8> %x, <i8 3, i8 0>
83 %ret = icmp ugt <2 x i8> %x, %tmp0
86 define <2 x i1> @p2_vec_nonsplat_edgecase1() {
87 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase1(
88 ; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
89 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt <2 x i8> [[X]], <i8 3, i8 -1>
90 ; CHECK-NEXT: ret <2 x i1> [[RET]]
92 %x = call <2 x i8> @gen2x8()
93 %tmp0 = and <2 x i8> %x, <i8 3, i8 -1>
94 %ret = icmp ugt <2 x i8> %x, %tmp0
98 define <3 x i1> @p3_vec_splat_poison() {
99 ; CHECK-LABEL: @p3_vec_splat_poison(
100 ; CHECK-NEXT: [[X:%.*]] = call <3 x i8> @gen3x8()
101 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt <3 x i8> [[X]], <i8 3, i8 poison, i8 3>
102 ; CHECK-NEXT: ret <3 x i1> [[RET]]
104 %x = call <3 x i8> @gen3x8()
105 %tmp0 = and <3 x i8> %x, <i8 3, i8 poison, i8 3>
106 %ret = icmp ugt <3 x i8> %x, %tmp0
110 define <3 x i1> @p3_vec_nonsplat_poison() {
111 ; CHECK-LABEL: @p3_vec_nonsplat_poison(
112 ; CHECK-NEXT: [[X:%.*]] = call <3 x i8> @gen3x8()
113 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt <3 x i8> [[X]], <i8 3, i8 poison, i8 15>
114 ; CHECK-NEXT: ret <3 x i1> [[RET]]
116 %x = call <3 x i8> @gen3x8()
117 %tmp0 = and <3 x i8> %x, <i8 3, i8 poison, i8 15>
118 %ret = icmp ugt <3 x i8> %x, %tmp0
122 ; ============================================================================ ;
123 ; Commutativity tests.
124 ; ============================================================================ ;
126 define i1 @c0(i8 %x) {
128 ; CHECK-NEXT: ret i1 false
131 %ret = icmp ugt i8 %tmp0, %x ; swapped order
135 ; ============================================================================ ;
136 ; Commutativity tests with variable
137 ; ============================================================================ ;
139 define i1 @cv0(i8 %y) {
141 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
142 ; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]
143 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[X]], [[TMP0]]
144 ; CHECK-NEXT: ret i1 [[RET]]
147 %tmp0 = lshr i8 -1, %y
148 %tmp1 = and i8 %tmp0, %x ; swapped order
149 %ret = icmp ugt i8 %x, %tmp1
153 define i1 @cv1(i8 %y) {
155 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
156 ; CHECK-NEXT: ret i1 false
159 %tmp0 = lshr i8 -1, %y
160 %tmp1 = and i8 %x, %tmp0
161 %ret = icmp ugt i8 %tmp1, %x ; swapped order
165 define i1 @cv2(i8 %x, i8 %y) {
167 ; CHECK-NEXT: ret i1 false
169 %tmp0 = lshr i8 -1, %y
170 %tmp1 = and i8 %tmp0, %x ; swapped order
171 %ret = icmp ugt i8 %tmp1, %x ; swapped order
175 ; ============================================================================ ;
176 ; One-use tests. We don't care about multi-uses here.
177 ; ============================================================================ ;
179 declare void @use8(i8)
181 define i1 @oneuse0() {
182 ; CHECK-LABEL: @oneuse0(
183 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
184 ; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X]], 3
185 ; CHECK-NEXT: call void @use8(i8 [[TMP0]])
186 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[X]], 3
187 ; CHECK-NEXT: ret i1 [[RET]]
191 call void @use8(i8 %tmp0)
192 %ret = icmp ugt i8 %x, %tmp0
196 ; ============================================================================ ;
198 ; ============================================================================ ;
202 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
203 ; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[X]], -5
204 ; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[TMP1]], 0
205 ; CHECK-NEXT: ret i1 [[RET]]
208 %tmp0 = and i8 %x, 4 ; power-of-two, but invalid.
209 %ret = icmp ugt i8 %x, %tmp0
213 define i1 @n1(i8 %y, i8 %notx) {
215 ; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()
216 ; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X]], 3
217 ; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[TMP0]], [[NOTX:%.*]]
218 ; CHECK-NEXT: ret i1 [[RET]]
222 %ret = icmp ugt i8 %tmp0, %notx ; not %x
226 define <2 x i1> @n2() {
228 ; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()
229 ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i8> [[X]], <i8 -4, i8 -17>
230 ; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i8> [[TMP1]], zeroinitializer
231 ; CHECK-NEXT: ret <2 x i1> [[RET]]
233 %x = call <2 x i8> @gen2x8()
234 %tmp0 = and <2 x i8> %x, <i8 3, i8 16> ; only the first one is valid.
235 %ret = icmp ugt <2 x i8> %x, %tmp0