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
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Test that the memchr library call simplifier works correctly.
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
@hello = constant [14 x i8] c"hello world\5Cn\00"
@hellonull = constant [14 x i8] c"hello\00world\5Cn\00"
@null = constant [1 x i8] zeroinitializer
@newlines = constant [3 x i8] c"\0D\0A\00"
@single = constant [2 x i8] c"\1F\00"
@spaces = constant [4 x i8] c" \0D\0A\00"
@negative = constant [3 x i8] c"\FF\FE\00"
@chp = global i8* zeroinitializer
declare i8* @memchr(i8*, i32, i32)
define void @test1() {
; CHECK-LABEL: @test1(
; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 6), i8** @chp, align 4
; CHECK-NEXT: ret void
;
%str = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
%dst = call i8* @memchr(i8* %str, i32 119, i32 14)
store i8* %dst, i8** @chp
ret void
}
define void @test2() {
; CHECK-LABEL: @test2(
; CHECK-NEXT: store i8* null, i8** @chp, align 4
; CHECK-NEXT: ret void
;
%str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
%dst = call i8* @memchr(i8* %str, i32 119, i32 1)
store i8* %dst, i8** @chp
ret void
}
define void @test3() {
; CHECK-LABEL: @test3(
; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 13), i8** @chp, align 4
; CHECK-NEXT: ret void
;
%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
%dst = call i8* @memchr(i8* %src, i32 0, i32 14)
store i8* %dst, i8** @chp
ret void
}
define void @test4(i32 %chr) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[DST:%.*]] = call i8* @memchr(i8* nonnull dereferenceable(14) getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 0), i32 [[CHR:%.*]], i32 14)
; CHECK-NEXT: store i8* [[DST]], i8** @chp, align 4
; CHECK-NEXT: ret void
;
%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
%dst = call i8* @memchr(i8* %src, i32 %chr, i32 14)
store i8* %dst, i8** @chp
ret void
}
define void @test5() {
; CHECK-LABEL: @test5(
; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 13), i8** @chp, align 4
; CHECK-NEXT: ret void
;
%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
%dst = call i8* @memchr(i8* %src, i32 65280, i32 14)
store i8* %dst, i8** @chp
ret void
}
define void @test6() {
; CHECK-LABEL: @test6(
; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 6), i8** @chp, align 4
; CHECK-NEXT: ret void
;
%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
; Overflow, but we still find the right thing.
%dst = call i8* @memchr(i8* %src, i32 119, i32 100)
store i8* %dst, i8** @chp
ret void
}
define void @test7() {
; CHECK-LABEL: @test7(
; CHECK-NEXT: store i8* null, i8** @chp, align 4
; CHECK-NEXT: ret void
;
%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
; Overflow
%dst = call i8* @memchr(i8* %src, i32 120, i32 100)
store i8* %dst, i8** @chp
ret void
}
define void @test8() {
; CHECK-LABEL: @test8(
; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hellonull, i32 0, i32 6), i8** @chp, align 4
; CHECK-NEXT: ret void
;
%str = getelementptr [14 x i8], [14 x i8]* @hellonull, i32 0, i32 0
%dst = call i8* @memchr(i8* %str, i32 119, i32 14)
store i8* %dst, i8** @chp
ret void
}
define void @test9() {
; CHECK-LABEL: @test9(
; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hellonull, i32 0, i32 6), i8** @chp, align 4
; CHECK-NEXT: ret void
;
%str = getelementptr [14 x i8], [14 x i8]* @hellonull, i32 0, i32 2
%dst = call i8* @memchr(i8* %str, i32 119, i32 12)
store i8* %dst, i8** @chp
ret void
}
define void @test10() {
; CHECK-LABEL: @test10(
; CHECK-NEXT: store i8* null, i8** @chp, align 4
; CHECK-NEXT: ret void
;
%str = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
%dst = call i8* @memchr(i8* %str, i32 119, i32 6)
store i8* %dst, i8** @chp
ret void
}
; Check transformation memchr("\r\n", C, 2) != nullptr -> (C & 9216) != 0
define i1 @test11(i32 %C) {
; CHECK-LABEL: @test11(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[C:%.*]] to i16
; CHECK-NEXT: [[TMP2:%.*]] = and i16 [[TMP1]], 255
; CHECK-NEXT: [[MEMCHR_BOUNDS:%.*]] = icmp ult i16 [[TMP2]], 16
; CHECK-NEXT: [[TMP3:%.*]] = shl i16 1, [[TMP2]]
; CHECK-NEXT: [[TMP4:%.*]] = and i16 [[TMP3]], 9216
; CHECK-NEXT: [[MEMCHR_BITS:%.*]] = icmp ne i16 [[TMP4]], 0
; CHECK-NEXT: [[MEMCHR:%.*]] = and i1 [[MEMCHR_BOUNDS]], [[MEMCHR_BITS]]
; CHECK-NEXT: ret i1 [[MEMCHR]]
;
%dst = call i8* @memchr(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @newlines, i64 0, i64 0), i32 %C, i32 2)
%cmp = icmp ne i8* %dst, null
ret i1 %cmp
}
; No 64 bits here
define i1 @test12(i32 %C) {
; CHECK-LABEL: @test12(
; CHECK-NEXT: [[DST:%.*]] = call i8* @memchr(i8* nonnull dereferenceable(3) getelementptr inbounds ([4 x i8], [4 x i8]* @spaces, i32 0, i32 0), i32 [[C:%.*]], i32 3)
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8* [[DST]], null
; CHECK-NEXT: ret i1 [[CMP]]
;
%dst = call i8* @memchr(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @spaces, i64 0, i64 0), i32 %C, i32 3)
%cmp = icmp ne i8* %dst, null
ret i1 %cmp
}
define i1 @test13(i32 %C) {
; CHECK-LABEL: @test13(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[C:%.*]], 255
; CHECK-NEXT: [[MEMCHR_BOUNDS:%.*]] = icmp ult i32 [[TMP1]], 32
; CHECK-NEXT: [[TMP2:%.*]] = shl i32 1, [[TMP1]]
; CHECK-NEXT: [[TMP3:%.*]] = and i32 [[TMP2]], -2147483647
; CHECK-NEXT: [[MEMCHR_BITS:%.*]] = icmp ne i32 [[TMP3]], 0
; CHECK-NEXT: [[MEMCHR:%.*]] = and i1 [[MEMCHR_BOUNDS]], [[MEMCHR_BITS]]
; CHECK-NEXT: ret i1 [[MEMCHR]]
;
%dst = call i8* @memchr(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @single, i64 0, i64 0), i32 %C, i32 2)
%cmp = icmp ne i8* %dst, null
ret i1 %cmp
}
define i1 @test14(i32 %C) {
; CHECK-LABEL: @test14(
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[C:%.*]], 255
; CHECK-NEXT: [[MEMCHR_BITS:%.*]] = icmp eq i32 [[TMP1]], 31
; CHECK-NEXT: ret i1 [[MEMCHR_BITS]]
;
%dst = call i8* @memchr(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @single, i64 0, i64 0), i32 %C, i32 1)
%cmp = icmp ne i8* %dst, null
ret i1 %cmp
}
define i1 @test15(i32 %C) {
; CHECK-LABEL: @test15(
; CHECK-NEXT: [[DST:%.*]] = call i8* @memchr(i8* nonnull dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @negative, i32 0, i32 0), i32 [[C:%.*]], i32 3)
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8* [[DST]], null
; CHECK-NEXT: ret i1 [[CMP]]
;
%dst = call i8* @memchr(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @negative, i64 0, i64 0), i32 %C, i32 3)
%cmp = icmp ne i8* %dst, null
ret i1 %cmp
}
@s = internal constant [1 x i8] [i8 0], align 1
define i8* @pr32124() {
; CHECK-LABEL: @pr32124(
; CHECK-NEXT: ret i8* getelementptr inbounds ([1 x i8], [1 x i8]* @s, i32 0, i32 0)
;
%res = tail call i8* @memchr(i8* getelementptr ([1 x i8], [1 x i8]* @s, i64 0, i64 0), i32 0, i32 1)
ret i8* %res
}
define i8* @test16(i8* %str, i32 %c, i32 %n) {
; CHECK-LABEL: @test16(
; CHECK-NEXT: [[RET:%.*]] = call i8* @memchr(i8* [[STR:%.*]], i32 [[C:%.*]], i32 [[N:%.*]])
; CHECK-NEXT: ret i8* [[RET]]
;
%ret = call i8* @memchr(i8* %str, i32 %c, i32 %n)
ret i8* %ret
}
define i8* @test17(i8* %str, i32 %c, i32 %n) {
; CHECK-LABEL: @test17(
; CHECK-NEXT: [[RET:%.*]] = call i8* @memchr(i8* nonnull [[STR:%.*]], i32 [[C:%.*]], i32 [[N:%.*]])
; CHECK-NEXT: ret i8* [[RET]]
;
%ret = call i8* @memchr(i8* nonnull %str, i32 %c, i32 %n)
ret i8* %ret
}
define i8* @test18(i8* %str, i32 %c) {
; CHECK-LABEL: @test18(
; CHECK-NEXT: [[RET:%.*]] = call i8* @memchr(i8* nonnull dereferenceable(5) [[STR:%.*]], i32 [[C:%.*]], i32 5)
; CHECK-NEXT: ret i8* [[RET]]
;
%ret = call i8* @memchr(i8* %str, i32 %c, i32 5)
ret i8* %ret
}
define i8* @test19(i8* %str, i32 %c) "null-pointer-is-valid"="true" {
; CHECK-LABEL: @test19(
; CHECK-NEXT: [[RET:%.*]] = call i8* @memchr(i8* dereferenceable(5) [[STR:%.*]], i32 [[C:%.*]], i32 5)
; CHECK-NEXT: ret i8* [[RET]]
;
%ret = call i8* @memchr(i8* %str, i32 %c, i32 5)
ret i8* %ret
}
|