1 ; NOTE: Assertions have been autogenerated by update_test_checks.py
2 ; RUN: opt -S %s -instsimplify | FileCheck %s
5 define i1 @test(i32 %length.i, i32 %i) {
9 %var29 = icmp slt i32 %i, %length.i
10 %res = icmp uge i1 %var29, %var29
14 ; i +_{nsw} C_{>0} <s L ==> i <s L -> true
15 define i1 @test2(i32 %length.i, i32 %i) {
16 ; CHECK-LABEL: @test2(
19 %iplus1 = add nsw i32 %i, 1
20 %var29 = icmp slt i32 %i, %length.i
21 %var30 = icmp slt i32 %iplus1, %length.i
22 %res = icmp ule i1 %var30, %var29
26 ; i + C_{>0} <s L ==> i <s L -> unknown without the nsw
27 define i1 @test2_neg(i32 %length.i, i32 %i) {
28 ; CHECK-LABEL: @test2_neg(
29 ; CHECK: [[IPLUS1:%.*]] = add i32 %i, 1
30 ; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 %i, %length.i
31 ; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[IPLUS1]], %length.i
32 ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
33 ; CHECK-NEXT: ret i1 [[RES]]
35 %iplus1 = add i32 %i, 1
36 %var29 = icmp slt i32 %i, %length.i
37 %var30 = icmp slt i32 %iplus1, %length.i
38 %res = icmp ule i1 %var30, %var29
42 ; sle is not implication
43 define i1 @test2_neg2(i32 %length.i, i32 %i) {
44 ; CHECK-LABEL: @test2_neg2(
45 ; CHECK: [[IPLUS1:%.*]] = add i32 %i, 1
46 ; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 %i, %length.i
47 ; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[IPLUS1]], %length.i
48 ; CHECK-NEXT: [[RES:%.*]] = icmp sle i1 [[VAR30]], [[VAR29]]
49 ; CHECK-NEXT: ret i1 [[RES]]
51 %iplus1 = add i32 %i, 1
52 %var29 = icmp slt i32 %i, %length.i
53 %var30 = icmp slt i32 %iplus1, %length.i
54 %res = icmp sle i1 %var30, %var29
58 ; The binary operator has to be an add
59 define i1 @test2_neg3(i32 %length.i, i32 %i) {
60 ; CHECK-LABEL: @test2_neg3(
61 ; CHECK: [[IPLUS1:%.*]] = sub nsw i32 %i, 1
62 ; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 %i, %length.i
63 ; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[IPLUS1]], %length.i
64 ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[VAR30]], [[VAR29]]
65 ; CHECK-NEXT: ret i1 [[RES]]
67 %iplus1 = sub nsw i32 %i, 1
68 %var29 = icmp slt i32 %i, %length.i
69 %var30 = icmp slt i32 %iplus1, %length.i
70 %res = icmp ule i1 %var30, %var29
74 ; i +_{nsw} C_{>0} <s L ==> i <s L -> true
75 ; With an inverted conditional (ule B A rather than canonical ugt A B
76 define i1 @test3(i32 %length.i, i32 %i) {
77 ; CHECK-LABEL: @test3(
80 %iplus1 = add nsw i32 %i, 1
81 %var29 = icmp slt i32 %i, %length.i
82 %var30 = icmp slt i32 %iplus1, %length.i
83 %res = icmp uge i1 %var29, %var30
87 ; i +_{nuw} C <u L ==> i <u L
88 define i1 @test4(i32 %length.i, i32 %i) {
89 ; CHECK-LABEL: @test4(
92 %iplus1 = add nuw i32 %i, 1
93 %var29 = icmp ult i32 %i, %length.i
94 %var30 = icmp ult i32 %iplus1, %length.i
95 %res = icmp ule i1 %var30, %var29
100 define <4 x i1> @test5(<4 x i1> %vec) {
101 ; CHECK-LABEL: @test5(
102 ; CHECK: ret <4 x i1> <i1 true, i1 true, i1 true, i1 true>
104 %res = icmp ule <4 x i1> %vec, %vec
108 ; Don't crash on vector inputs - pr25040
109 define <4 x i1> @test6(<4 x i1> %a, <4 x i1> %b) {
110 ; CHECK-LABEL: @test6(
111 ; CHECK: [[RES:%.*]] = icmp ule <4 x i1> %a, %b
112 ; CHECK-NEXT: ret <4 x i1> [[RES]]
114 %res = icmp ule <4 x i1> %a, %b
118 ; i +_{nsw} 1 <s L ==> i < L +_{nsw} 1
119 define i1 @test7(i32 %length.i, i32 %i) {
120 ; CHECK-LABEL: @test7(
123 %iplus1 = add nsw i32 %i, 1
124 %len.plus.one = add nsw i32 %length.i, 1
125 %var29 = icmp slt i32 %i, %len.plus.one
126 %var30 = icmp slt i32 %iplus1, %length.i
127 %res = icmp ule i1 %var30, %var29
131 ; i +_{nuw} 1 <u L ==> i < L +_{nuw} 1
132 define i1 @test8(i32 %length.i, i32 %i) {
133 ; CHECK-LABEL: @test8(
136 %iplus1 = add nuw i32 %i, 1
137 %len.plus.one = add nuw i32 %length.i, 1
138 %var29 = icmp ult i32 %i, %len.plus.one
139 %var30 = icmp ult i32 %iplus1, %length.i
140 %res = icmp ule i1 %var30, %var29
144 ; i +_{nuw} C <u L ==> i < L, even if C is negative
145 define i1 @test9(i32 %length.i, i32 %i) {
146 ; CHECK-LABEL: @test9(
149 %iplus1 = add nuw i32 %i, -100
150 %var29 = icmp ult i32 %i, %length.i
151 %var30 = icmp ult i32 %iplus1, %length.i
152 %res = icmp ule i1 %var30, %var29
156 define i1 @test10(i32 %length.i, i32 %x.full) {
157 ; CHECK-LABEL: @test10(
160 %x = and i32 %x.full, 4294901760 ;; 4294901760 == 0xffff0000
161 %large = or i32 %x, 100
162 %small = or i32 %x, 90
163 %known = icmp ult i32 %large, %length.i
164 %to.prove = icmp ult i32 %small, %length.i
165 %res = icmp ule i1 %known, %to.prove
169 define i1 @test11(i32 %length.i, i32 %x) {
170 ; CHECK-LABEL: @test11(
171 ; CHECK: [[LARGE:%.*]] = or i32 %x, 100
172 ; CHECK-NEXT: [[SMALL:%.*]] = or i32 %x, 90
173 ; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], %length.i
174 ; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], %length.i
175 ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]]
176 ; CHECK-NEXT: ret i1 [[RES]]
178 %large = or i32 %x, 100
179 %small = or i32 %x, 90
180 %known = icmp ult i32 %large, %length.i
181 %to.prove = icmp ult i32 %small, %length.i
182 %res = icmp ule i1 %known, %to.prove
186 define i1 @test12(i32 %length.i, i32 %x.full) {
187 ; CHECK-LABEL: @test12(
188 ; CHECK: [[X:%.*]] = and i32 [[X:%.*]].full, -65536
189 ; CHECK-NEXT: [[LARGE:%.*]] = or i32 [[X]], 65536
190 ; CHECK-NEXT: [[SMALL:%.*]] = or i32 [[X]], 90
191 ; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], %length.i
192 ; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], %length.i
193 ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]]
194 ; CHECK-NEXT: ret i1 [[RES]]
196 %x = and i32 %x.full, 4294901760 ;; 4294901760 == 0xffff0000
197 %large = or i32 %x, 65536 ;; 65536 == 0x00010000
198 %small = or i32 %x, 90
199 %known = icmp ult i32 %large, %length.i
200 %to.prove = icmp ult i32 %small, %length.i
201 %res = icmp ule i1 %known, %to.prove
205 define i1 @test13(i32 %length.i, i32 %x) {
206 ; CHECK-LABEL: @test13(
209 %large = add nuw i32 %x, 100
210 %small = add nuw i32 %x, 90
211 %known = icmp ult i32 %large, %length.i
212 %to.prove = icmp ult i32 %small, %length.i
213 %res = icmp ule i1 %known, %to.prove
217 define i1 @test14(i32 %length.i, i32 %x.full) {
218 ; CHECK-LABEL: @test14(
221 %x = and i32 %x.full, 4294905615 ;; 4294905615 == 0xffff0f0f
222 %large = or i32 %x, 8224 ;; == 0x2020
223 %small = or i32 %x, 4112 ;; == 0x1010
224 %known = icmp ult i32 %large, %length.i
225 %to.prove = icmp ult i32 %small, %length.i
226 %res = icmp ule i1 %known, %to.prove
230 define i1 @test15(i32 %length.i, i32 %x) {
231 ; CHECK-LABEL: @test15(
232 ; CHECK: [[LARGE:%.*]] = add nuw i32 %x, 100
233 ; CHECK-NEXT: [[SMALL:%.*]] = add nuw i32 %x, 110
234 ; CHECK-NEXT: [[KNOWN:%.*]] = icmp ult i32 [[LARGE]], %length.i
235 ; CHECK-NEXT: [[TO_PROVE:%.*]] = icmp ult i32 [[SMALL]], %length.i
236 ; CHECK-NEXT: [[RES:%.*]] = icmp ule i1 [[KNOWN]], [[TO_PROVE]]
237 ; CHECK-NEXT: ret i1 [[RES]]
239 %large = add nuw i32 %x, 100
240 %small = add nuw i32 %x, 110
241 %known = icmp ult i32 %large, %length.i
242 %to.prove = icmp ult i32 %small, %length.i
243 %res = icmp ule i1 %known, %to.prove
247 ; X >=(s) Y == X ==> Y (i1 1 becomes -1 for reasoning)
248 define i1 @test_sge(i32 %length.i, i32 %i) {
249 ; CHECK-LABEL: @test_sge(
252 %iplus1 = add nsw nuw i32 %i, 1
253 %var29 = icmp ult i32 %i, %length.i
254 %var30 = icmp ult i32 %iplus1, %length.i
255 %res = icmp sge i1 %var30, %var29