libcalls.ll
7.31 KB
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
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -inferattrs -basic-aa -dse -enable-dse-memoryssa < %s | FileCheck %s
target triple = "x86_64-unknown-linux-gnu"
declare i8* @strcpy(i8* %dest, i8* %src) nounwind
define void @test1(i8* %src) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: ret void
;
%B = alloca [16 x i8]
%dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0
%call = call i8* @strcpy(i8* %dest, i8* %src)
ret void
}
declare i8* @strncpy(i8* %dest, i8* %src, i64 %n) nounwind
define void @test2(i8* %src) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: ret void
;
%B = alloca [16 x i8]
%dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0
%call = call i8* @strncpy(i8* %dest, i8* %src, i64 12)
ret void
}
declare i8* @strcat(i8* %dest, i8* %src) nounwind
define void @test3(i8* %src) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: ret void
;
%B = alloca [16 x i8]
%dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0
%call = call i8* @strcat(i8* %dest, i8* %src)
ret void
}
declare i8* @strncat(i8* %dest, i8* %src, i64 %n) nounwind
define void @test4(i8* %src) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: ret void
;
%B = alloca [16 x i8]
%dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0
%call = call i8* @strncat(i8* %dest, i8* %src, i64 12)
ret void
}
define void @test5(i8* nocapture %src) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: ret void
;
%dest = alloca [100 x i8], align 16
%arraydecay = getelementptr inbounds [100 x i8], [100 x i8]* %dest, i64 0, i64 0
%call = call i8* @strcpy(i8* %arraydecay, i8* %src)
%arrayidx = getelementptr inbounds i8, i8* %call, i64 10
store i8 97, i8* %arrayidx, align 1
ret void
}
declare void @user(i8* %p)
define void @test6(i8* %src) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[B:%.*]] = alloca [16 x i8], align 1
; CHECK-NEXT: [[DEST:%.*]] = getelementptr inbounds [16 x i8], [16 x i8]* [[B]], i64 0, i64 0
; CHECK-NEXT: [[CALL:%.*]] = call i8* @strcpy(i8* [[DEST]], i8* [[SRC:%.*]])
; CHECK-NEXT: call void @user(i8* [[DEST]])
; CHECK-NEXT: ret void
;
%B = alloca [16 x i8]
%dest = getelementptr inbounds [16 x i8], [16 x i8]* %B, i64 0, i64 0
%call = call i8* @strcpy(i8* %dest, i8* %src)
call void @user(i8* %dest)
ret void
}
declare i32 @memcmp(i8*, i8*, i64)
define i32 @test_memcmp_const_size(i8* noalias %foo) {
; CHECK-LABEL: @test_memcmp_const_size(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1
; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8*
; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1
; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1
; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1
; CHECK-NEXT: [[RES:%.*]] = call i32 @memcmp(i8* nonnull dereferenceable(2) [[FOO:%.*]], i8* nonnull dereferenceable(2) [[STACK_PTR]], i64 2)
; CHECK-NEXT: ret i32 [[RES]]
;
entry:
%stack = alloca [10 x i8]
%stack.ptr = bitcast [10 x i8]* %stack to i8*
store i8 49, i8* %stack.ptr, align 1
%gep.1 = getelementptr i8, i8* %stack.ptr, i64 1
store i8 50, i8* %gep.1, align 1
%gep.2 = getelementptr i8, i8* %stack.ptr, i64 2
store i8 51, i8* %gep.2, align 1
%gep.3 = getelementptr i8, i8* %stack.ptr, i64 3
store i8 52, i8* %gep.3, align 1
%res = call i32 @memcmp(i8* nonnull dereferenceable(2) %foo, i8* nonnull dereferenceable(2) %stack.ptr, i64 2)
ret i32 %res
}
define i32 @test_memcmp_variable_size(i8* noalias %foo, i64 %n) {
; CHECK-LABEL: @test_memcmp_variable_size(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1
; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8*
; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1
; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1
; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1
; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 2
; CHECK-NEXT: store i8 51, i8* [[GEP_2]], align 1
; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 3
; CHECK-NEXT: store i8 52, i8* [[GEP_3]], align 1
; CHECK-NEXT: [[RES:%.*]] = call i32 @memcmp(i8* nonnull [[FOO:%.*]], i8* nonnull [[STACK_PTR]], i64 [[N:%.*]])
; CHECK-NEXT: ret i32 [[RES]]
;
entry:
%stack = alloca [10 x i8]
%stack.ptr = bitcast [10 x i8]* %stack to i8*
store i8 49, i8* %stack.ptr, align 1
%gep.1 = getelementptr i8, i8* %stack.ptr, i64 1
store i8 50, i8* %gep.1, align 1
%gep.2 = getelementptr i8, i8* %stack.ptr, i64 2
store i8 51, i8* %gep.2, align 1
%gep.3 = getelementptr i8, i8* %stack.ptr, i64 3
store i8 52, i8* %gep.3, align 1
%res = call i32 @memcmp(i8* nonnull %foo, i8* nonnull %stack.ptr, i64 %n)
ret i32 %res
}
declare i32 @bcmp(i8*, i8*, i64)
define i1 @test_bcmp_const_size(i8* noalias %foo) {
; CHECK-LABEL: @test_bcmp_const_size(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1
; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8*
; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1
; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1
; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1
; CHECK-NEXT: [[CALL:%.*]] = call i32 @bcmp(i8* nonnull dereferenceable(2) [[FOO:%.*]], i8* nonnull dereferenceable(2) [[STACK_PTR]], i64 2)
; CHECK-NEXT: [[RES:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%stack = alloca [10 x i8]
%stack.ptr = bitcast [10 x i8]* %stack to i8*
store i8 49, i8* %stack.ptr, align 1
%gep.1 = getelementptr i8, i8* %stack.ptr, i64 1
store i8 50, i8* %gep.1, align 1
%gep.2 = getelementptr i8, i8* %stack.ptr, i64 2
store i8 51, i8* %gep.2, align 1
%gep.3 = getelementptr i8, i8* %stack.ptr, i64 3
store i8 52, i8* %gep.3, align 1
%call = call i32 @bcmp(i8* nonnull dereferenceable(2) %foo, i8* nonnull dereferenceable(2) %stack.ptr, i64 2)
%res = icmp eq i32 %call, 0
ret i1 %res
}
define i1 @test_bcmp_variable_size(i8* noalias %foo, i64 %n) {
; CHECK-LABEL: @test_bcmp_variable_size(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[STACK:%.*]] = alloca [10 x i8], align 1
; CHECK-NEXT: [[STACK_PTR:%.*]] = bitcast [10 x i8]* [[STACK]] to i8*
; CHECK-NEXT: store i8 49, i8* [[STACK_PTR]], align 1
; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 1
; CHECK-NEXT: store i8 50, i8* [[GEP_1]], align 1
; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 2
; CHECK-NEXT: store i8 51, i8* [[GEP_2]], align 1
; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr i8, i8* [[STACK_PTR]], i64 3
; CHECK-NEXT: store i8 52, i8* [[GEP_3]], align 1
; CHECK-NEXT: [[CALL:%.*]] = call i32 @bcmp(i8* nonnull [[FOO:%.*]], i8* nonnull [[STACK_PTR]], i64 [[N:%.*]])
; CHECK-NEXT: [[RES:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT: ret i1 [[RES]]
;
entry:
%stack = alloca [10 x i8]
%stack.ptr = bitcast [10 x i8]* %stack to i8*
store i8 49, i8* %stack.ptr, align 1
%gep.1 = getelementptr i8, i8* %stack.ptr, i64 1
store i8 50, i8* %gep.1, align 1
%gep.2 = getelementptr i8, i8* %stack.ptr, i64 2
store i8 51, i8* %gep.2, align 1
%gep.3 = getelementptr i8, i8* %stack.ptr, i64 3
store i8 52, i8* %gep.3, align 1
%call = call i32 @bcmp(i8* nonnull %foo, i8* nonnull %stack.ptr, i64 %n)
%res = icmp eq i32 %call, 0
ret i1 %res
}