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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S -data-layout="E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" | FileCheck %s -check-prefixes=ALL,CHECK
; RUN: opt < %s -passes=instcombine -S -data-layout="E-p:32:32:32-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128" | FileCheck %s -check-prefixes=ALL,P32
; RUN: opt < %s -passes=instcombine -S | FileCheck %s -check-prefixes=ALL,NODL
declare void @use(...)
@int = global i32 zeroinitializer
; Zero byte allocas should be merged if they can't be deleted.
define void @test() {
; CHECK-LABEL: @test(
; CHECK-NEXT: [[X:%.*]] = alloca [0 x i32], align 4
; CHECK-NEXT: call void (...) @use(ptr nonnull [[X]])
; CHECK-NEXT: call void (...) @use(ptr nonnull [[X]])
; CHECK-NEXT: call void (...) @use(ptr nonnull [[X]])
; CHECK-NEXT: call void (...) @use(ptr nonnull [[X]])
; CHECK-NEXT: ret void
;
; P32-LABEL: @test(
; P32-NEXT: [[X:%.*]] = alloca [0 x i32], align 4
; P32-NEXT: call void (...) @use(ptr nonnull [[X]])
; P32-NEXT: call void (...) @use(ptr nonnull [[X]])
; P32-NEXT: call void (...) @use(ptr nonnull [[X]])
; P32-NEXT: call void (...) @use(ptr nonnull [[X]])
; P32-NEXT: ret void
;
; NODL-LABEL: @test(
; NODL-NEXT: [[X:%.*]] = alloca [0 x i32], align 8
; NODL-NEXT: call void (...) @use(ptr nonnull [[X]])
; NODL-NEXT: call void (...) @use(ptr nonnull [[X]])
; NODL-NEXT: call void (...) @use(ptr nonnull [[X]])
; NODL-NEXT: call void (...) @use(ptr nonnull [[X]])
; NODL-NEXT: ret void
;
%X = alloca [0 x i32] ; <ptr> [#uses=1]
call void (...) @use( ptr %X )
%Y = alloca i32, i32 0 ; <ptr> [#uses=1]
call void (...) @use( ptr %Y )
%Z = alloca { } ; <ptr> [#uses=1]
call void (...) @use( ptr %Z )
%size = load i32, ptr @int
%A = alloca {{}}, i32 %size
call void (...) @use( {{}}* %A )
ret void
}
; Zero byte allocas should be deleted.
define void @test2() {
; ALL-LABEL: @test2(
; ALL-NEXT: ret void
;
%A = alloca i32 ; <ptr> [#uses=1]
store i32 123, ptr %A
ret void
}
; Zero byte allocas should be deleted.
define void @test3() {
; ALL-LABEL: @test3(
; ALL-NEXT: ret void
;
%A = alloca { i32 } ; <ptr> [#uses=1]
%B = getelementptr { i32 }, ptr %A, i32 0, i32 0 ; <ptr> [#uses=1]
store i32 123, ptr %B
ret void
}
define ptr @test4(i32 %n) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[TMP1:%.*]] = zext i32 [[N:%.*]] to i64
; CHECK-NEXT: [[A:%.*]] = alloca i32, i64 [[TMP1]], align 4
; CHECK-NEXT: ret ptr [[A]]
;
; P32-LABEL: @test4(
; P32-NEXT: [[A:%.*]] = alloca i32, i32 [[N:%.*]], align 4
; P32-NEXT: ret ptr [[A]]
;
; NODL-LABEL: @test4(
; NODL-NEXT: [[TMP1:%.*]] = zext i32 [[N:%.*]] to i64
; NODL-NEXT: [[A:%.*]] = alloca i32, i64 [[TMP1]], align 4
; NODL-NEXT: ret ptr [[A]]
;
%A = alloca i32, i32 %n
ret ptr %A
}
; Allocas which are only used by GEPs, bitcasts, addrspacecasts, and stores
; (transitively) should be deleted.
define void @test5() {
; ALL-LABEL: @test5(
; ALL-NEXT: entry:
; ALL-NEXT: ret void
;
entry:
%a = alloca { i32 }
%b = alloca ptr
%c = alloca i32
store i32 123, ptr %a
store ptr %a, ptr %b
store i32 123, ptr %b
store atomic i32 2, ptr %a unordered, align 4
store atomic i32 3, ptr %a release, align 4
store atomic i32 4, ptr %a seq_cst, align 4
%c.1 = addrspacecast ptr %c to ptr addrspace(1)
store i32 123, ptr addrspace(1) %c.1
ret void
}
declare void @f(ptr %p)
; Check that we don't delete allocas in some erroneous cases.
define void @test6() {
; CHECK-LABEL: @test6(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca { i32 }, align 4
; CHECK-NEXT: [[B:%.*]] = alloca i32, align 4
; CHECK-NEXT: store volatile i32 123, ptr [[A]], align 4
; CHECK-NEXT: tail call void @f(ptr nonnull [[B]])
; CHECK-NEXT: ret void
;
; P32-LABEL: @test6(
; P32-NEXT: entry:
; P32-NEXT: [[A:%.*]] = alloca { i32 }, align 4
; P32-NEXT: [[B:%.*]] = alloca i32, align 4
; P32-NEXT: store volatile i32 123, ptr [[A]], align 4
; P32-NEXT: tail call void @f(ptr nonnull [[B]])
; P32-NEXT: ret void
;
; NODL-LABEL: @test6(
; NODL-NEXT: entry:
; NODL-NEXT: [[A:%.*]] = alloca { i32 }, align 8
; NODL-NEXT: [[B:%.*]] = alloca i32, align 4
; NODL-NEXT: store volatile i32 123, ptr [[A]], align 8
; NODL-NEXT: tail call void @f(ptr nonnull [[B]])
; NODL-NEXT: ret void
;
entry:
%a = alloca { i32 }
%b = alloca i32
store volatile i32 123, ptr %a
tail call void @f(ptr %b)
ret void
}
; PR14371
%opaque_type = type opaque
%real_type = type { { i32, ptr } }
@opaque_global = external constant %opaque_type, align 4
define void @test7() {
; ALL-LABEL: @test7(
; ALL-NEXT: entry:
; ALL-NEXT: ret void
;
entry:
%0 = alloca %real_type, align 4
call void @llvm.memcpy.p0.p0.i32(ptr %0, ptr @opaque_global, i32 8, i1 false)
ret void
}
declare void @llvm.memcpy.p0.p0.i32(ptr nocapture, ptr nocapture, i32, i1) nounwind
; Check that the GEP indices use the pointer size, or 64 if unknown
define void @test8() {
; ALL-LABEL: @test8(
; ALL-NEXT: [[X1:%.*]] = alloca [100 x i32], align 4
; ALL-NEXT: call void (...) @use(ptr nonnull [[X1]])
; ALL-NEXT: ret void
;
%x = alloca i32, i32 100
call void (...) @use(ptr %x)
ret void
}
; PR19569
%struct_type = type { i32, i32 }
declare void @test9_aux(ptr inalloca(<{ %struct_type }>))
declare ptr @llvm.stacksave()
declare void @llvm.stackrestore(ptr)
define void @test9(ptr %a) {
; ALL-LABEL: @test9(
; ALL-NEXT: entry:
; ALL-NEXT: [[ARGMEM:%.*]] = alloca inalloca <{ [[STRUCT_TYPE:%.*]] }>, align 8
; ALL-NEXT: [[TMP0:%.*]] = load i64, ptr [[A:%.*]], align 4
; ALL-NEXT: store i64 [[TMP0]], ptr [[ARGMEM]], align 8
; ALL-NEXT: call void @test9_aux(ptr nonnull inalloca(<{ [[STRUCT_TYPE]] }>) [[ARGMEM]])
; ALL-NEXT: ret void
;
entry:
%inalloca.save = call ptr @llvm.stacksave()
%argmem = alloca inalloca <{ %struct_type }>
call void @llvm.memcpy.p0.p0.i32(ptr align 4 %argmem, ptr align 4 %a, i32 8, i1 false)
call void @test9_aux(ptr inalloca(<{ %struct_type }>) %argmem)
call void @llvm.stackrestore(ptr %inalloca.save)
ret void
}
define void @test10() {
; ALL-LABEL: @test10(
; ALL-NEXT: entry:
; ALL-NEXT: [[V32:%.*]] = alloca i1, align 8
; ALL-NEXT: [[V64:%.*]] = alloca i1, align 8
; ALL-NEXT: [[V33:%.*]] = alloca i1, align 8
; ALL-NEXT: call void (...) @use(ptr nonnull [[V32]], ptr nonnull [[V64]], ptr nonnull [[V33]])
; ALL-NEXT: ret void
;
entry:
%v32 = alloca i1, align 8
%v64 = alloca i1, i64 1, align 8
%v33 = alloca i1, i33 1, align 8
call void (...) @use(ptr %v32, ptr %v64, ptr %v33)
ret void
}
define void @test11() {
; ALL-LABEL: @test11(
; ALL-NEXT: entry:
; ALL-NEXT: [[Y:%.*]] = alloca i32, align 4
; ALL-NEXT: call void (...) @use(ptr nonnull @int) [ "blah"(ptr [[Y]]) ]
; ALL-NEXT: ret void
;
entry:
%y = alloca i32
call void (...) @use(ptr nonnull @int) [ "blah"(ptr %y) ]
ret void
}
|
