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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
define i1 @test_icmp_ult_zext_icmp_trunc_nuw(i16 %x, i32 %y) {
; CHECK-LABEL: define i1 @test_icmp_ult_zext_icmp_trunc_nuw(
; CHECK-SAME: i16 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT: [[EXT:%.*]] = zext i16 [[X]] to i32
; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[Y]], [[EXT]]
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[CONV:%.*]] = trunc nuw i32 [[Y]] to i16
; CHECK-NEXT: ret i1 false
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i1 false
;
%ext = zext i16 %x to i32
%cond = icmp ult i32 %y, %ext
br i1 %cond, label %if.then, label %if.else
if.then:
%conv = trunc nuw i32 %y to i16
%cmp = icmp eq i16 %x, %conv
ret i1 %cmp
if.else:
ret i1 false
}
define i1 @test_icmp_slt_sext_icmp_trunc_nsw(i16 %x, i32 %y) {
; CHECK-LABEL: define i1 @test_icmp_slt_sext_icmp_trunc_nsw(
; CHECK-SAME: i16 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT: [[EXT:%.*]] = sext i16 [[X]] to i32
; CHECK-NEXT: [[COND:%.*]] = icmp slt i32 [[Y]], [[EXT]]
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[CONV:%.*]] = trunc nsw i32 [[Y]] to i16
; CHECK-NEXT: ret i1 false
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i1 false
;
%ext = sext i16 %x to i32
%cond = icmp slt i32 %y, %ext
br i1 %cond, label %if.then, label %if.else
if.then:
%conv = trunc nsw i32 %y to i16
%cmp = icmp slt i16 %x, %conv
ret i1 %cmp
if.else:
ret i1 false
}
define i1 @test_icmp_ult_trunc_nsw_nneg_icmp_trunc_nuw(i64 %x, i32 %y) {
; CHECK-LABEL: define i1 @test_icmp_ult_trunc_nsw_nneg_icmp_trunc_nuw(
; CHECK-SAME: i64 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT: [[EXT:%.*]] = trunc nsw i64 [[X]] to i32
; CHECK-NEXT: [[NNEG:%.*]] = icmp sgt i64 [[X]], -1
; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[Y]], [[EXT]]
; CHECK-NEXT: [[AND:%.*]] = and i1 [[NNEG]], [[COND]]
; CHECK-NEXT: br i1 [[AND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[CONV:%.*]] = zext i32 [[Y]] to i64
; CHECK-NEXT: ret i1 false
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i1 false
;
%ext = trunc nsw i64 %x to i32
%nneg = icmp sgt i64 %x, -1
%cond = icmp ult i32 %y, %ext
%and = and i1 %nneg, %cond
br i1 %and, label %if.then, label %if.else
if.then:
%conv = zext i32 %y to i64
%cmp = icmp eq i64 %x, %conv
ret i1 %cmp
if.else:
ret i1 false
}
define i1 @test2(i32 %n) {
; CHECK-LABEL: define i1 @test2(
; CHECK-SAME: i32 [[N:%.*]]) {
; CHECK-NEXT: [[COND:%.*]] = icmp sgt i32 [[N]], 0
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[EXT:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT: [[END:%.*]] = add nsw i64 [[EXT]], -1
; CHECK-NEXT: br label %[[FOR_BODY:.*]]
; CHECK: [[FOR_BODY]]:
; CHECK-NEXT: [[INDVAR:%.*]] = phi i64 [ 0, %[[IF_THEN]] ], [ [[INDVAR_NEXT:%.*]], %[[FOR_NEXT:.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[INDVAR]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label %[[IF_ELSE]], label %[[FOR_NEXT]]
; CHECK: [[FOR_NEXT]]:
; CHECK-NEXT: [[INDVAR_NEXT]] = add nuw nsw i64 [[INDVAR]], 1
; CHECK-NEXT: [[COND2:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[COND2]], label %[[FOR_BODY]], label %[[FOR_END:.*]]
; CHECK: [[FOR_END]]:
; CHECK-NEXT: [[TRUNC:%.*]] = trunc nsw i64 [[INDVAR_NEXT]] to i32
; CHECK-NEXT: ret i1 true
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i1 false
;
%cond = icmp sgt i32 %n, 0
br i1 %cond, label %if.then, label %if.else
if.then:
%ext = zext nneg i32 %n to i64
%end = add nsw i64 %ext, -1
br label %for.body
for.body:
%indvar = phi i64 [ 0, %if.then ], [ %indvar.next, %for.next ]
%cmp = icmp eq i64 %indvar, %end
br i1 %cmp, label %if.else, label %for.next
for.next:
%indvar.next = add nuw nsw i64 %indvar, 1
%cond2 = call i1 @cond()
br i1 %cond2, label %for.body, label %for.end
for.end:
%trunc = trunc nsw i64 %indvar.next to i32
%res = icmp sgt i32 %n, %trunc
ret i1 %res
if.else:
ret i1 false
}
define i1 @test_icmp_ult_zext_icmp_trunc(i16 %x, i32 %y) {
; CHECK-LABEL: define i1 @test_icmp_ult_zext_icmp_trunc(
; CHECK-SAME: i16 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT: [[EXT:%.*]] = zext i16 [[X]] to i32
; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[Y]], [[EXT]]
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[CONV:%.*]] = trunc i32 [[Y]] to i16
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[X]], [[CONV]]
; CHECK-NEXT: ret i1 [[CMP]]
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i1 false
;
%ext = zext i16 %x to i32
%cond = icmp ult i32 %y, %ext
br i1 %cond, label %if.then, label %if.else
if.then:
%conv = trunc i32 %y to i16
%cmp = icmp eq i16 %x, %conv
ret i1 %cmp
if.else:
ret i1 false
}
define i1 @test_icmp_ult_zext_icmp_trunc_nuw_i128(i16 %x, i128 %y) {
; CHECK-LABEL: define i1 @test_icmp_ult_zext_icmp_trunc_nuw_i128(
; CHECK-SAME: i16 [[X:%.*]], i128 [[Y:%.*]]) {
; CHECK-NEXT: [[EXT:%.*]] = zext i16 [[X]] to i128
; CHECK-NEXT: [[COND:%.*]] = icmp ult i128 [[Y]], [[EXT]]
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[CONV:%.*]] = trunc nuw i128 [[Y]] to i16
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i16 [[X]], [[CONV]]
; CHECK-NEXT: ret i1 [[CMP]]
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i1 false
;
%ext = zext i16 %x to i128
%cond = icmp ult i128 %y, %ext
br i1 %cond, label %if.then, label %if.else
if.then:
%conv = trunc nuw i128 %y to i16
%cmp = icmp eq i16 %x, %conv
ret i1 %cmp
if.else:
ret i1 false
}
; We do not know the sign of %x, so we cannot infer nuw for %ext.
define i1 @test_icmp_ult_trunc_nsw_icmp_trunc_nuw(i64 %x, i32 %y) {
; CHECK-LABEL: define i1 @test_icmp_ult_trunc_nsw_icmp_trunc_nuw(
; CHECK-SAME: i64 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT: [[EXT:%.*]] = trunc nsw i64 [[X]] to i32
; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[Y]], [[EXT]]
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[CONV:%.*]] = zext i32 [[Y]] to i64
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[X]], [[CONV]]
; CHECK-NEXT: ret i1 [[CMP]]
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i1 false
;
%ext = trunc nsw i64 %x to i32
%cond = icmp ult i32 %y, %ext
br i1 %cond, label %if.then, label %if.else
if.then:
%conv = zext i32 %y to i64
%cmp = icmp eq i64 %x, %conv
ret i1 %cmp
if.else:
ret i1 false
}
declare void @cond()
|
