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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes='require<loops>,instcombine' -S | FileCheck %s
target datalayout = "E-p:64:64:64-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64"
; Constant folding should fix notionally out-of-bounds indices
; and add inbounds keywords.
%struct.X = type { [3 x i32], [3 x i32] }
@Y = internal global [3 x %struct.X] zeroinitializer
define void @frob() {
; CHECK-LABEL: @frob(
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 0), align 16
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 1), align 4
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 2), align 8
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 1, i64 0), align 4
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 1, i64 1), align 16
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 1, i64 2), align 4
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 1, i32 0, i64 0), align 8
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 1, i32 0, i64 1), align 4
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 1, i32 0, i64 2), align 16
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 1, i32 1, i64 0), align 4
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 1, i32 1, i64 1), align 8
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 1, i32 1, i64 2), align 4
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 2, i32 0, i64 0), align 16
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 2, i32 0, i64 1), align 4
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 2, i32 0, i64 2), align 8
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 2, i32 1, i64 0), align 4
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 2, i32 1, i64 1), align 16
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 2, i32 1, i64 2), align 4
; CHECK-NEXT: store i32 1, i32* getelementptr inbounds ([3 x %struct.X], [3 x %struct.X]* @Y, i64 1, i64 0, i32 0, i64 0), align 8
; CHECK-NEXT: store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 2, i64 0, i32 0, i64 0), align 16
; CHECK-NEXT: store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 1, i64 0, i32 0, i64 1), align 8
; CHECK-NEXT: ret void
;
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 0), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 1), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 2), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 3), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 4), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 5), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 6), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 7), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 8), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 9), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 10), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 11), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 12), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 13), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 14), align 8
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 15), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 16), align 8
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 17), align 4
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 18), align 8
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 36), align 8
store i32 1, i32* getelementptr ([3 x %struct.X], [3 x %struct.X]* @Y, i64 0, i64 0, i32 0, i64 19), align 8
ret void
}
; PR8883 - Constant fold exotic gep subtract
@X = global [1000 x i8] zeroinitializer, align 16
define i64 @test2() {
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret i64 1000
;
entry:
%A = bitcast i8* getelementptr inbounds ([1000 x i8], [1000 x i8]* @X, i64 1, i64 0) to i8*
%B = bitcast i8* getelementptr inbounds ([1000 x i8], [1000 x i8]* @X, i64 0, i64 0) to i8*
%B2 = ptrtoint i8* %B to i64
%C = sub i64 0, %B2
%D = getelementptr i8, i8* %A, i64 %C
%E = ptrtoint i8* %D to i64
ret i64 %E
}
@X_as1 = addrspace(1) global [1000 x i8] zeroinitializer, align 16
define i16 @test2_as1() {
; CHECK-LABEL: @test2_as1(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret i16 1000
;
entry:
%A = bitcast i8 addrspace(1)* getelementptr inbounds ([1000 x i8], [1000 x i8] addrspace(1)* @X_as1, i64 1, i64 0) to i8 addrspace(1)*
%B = bitcast i8 addrspace(1)* getelementptr inbounds ([1000 x i8], [1000 x i8] addrspace(1)* @X_as1, i64 0, i64 0) to i8 addrspace(1)*
%B2 = ptrtoint i8 addrspace(1)* %B to i16
%C = sub i16 0, %B2
%D = getelementptr i8, i8 addrspace(1)* %A, i16 %C
%E = ptrtoint i8 addrspace(1)* %D to i16
ret i16 %E
}
; Check that we improve the alignment information.
; The base pointer is 16-byte aligned and we access the field at
; an offset of 8-byte.
; Every element in the @CallerInfos array is 16-byte aligned so
; any access from the following gep is 8-byte aligned.
%struct.CallerInfo = type { i8*, i32 }
@CallerInfos = global [128 x %struct.CallerInfo] zeroinitializer, align 16
define i32 @test_gep_in_struct(i64 %idx) {
; CHECK-LABEL: @test_gep_in_struct(
; CHECK-NEXT: [[NS7:%.*]] = getelementptr inbounds [128 x %struct.CallerInfo], [128 x %struct.CallerInfo]* @CallerInfos, i64 0, i64 [[IDX:%.*]], i32 1
; CHECK-NEXT: [[RES:%.*]] = load i32, i32* [[NS7]], align 8
; CHECK-NEXT: ret i32 [[RES]]
;
%NS7 = getelementptr inbounds [128 x %struct.CallerInfo], [128 x %struct.CallerInfo]* @CallerInfos, i64 0, i64 %idx, i32 1
%res = load i32, i32* %NS7, align 1
ret i32 %res
}
@g = external global i8
@g2 = external global i8
declare i64 @get.i64()
declare void @use.ptr(i8*)
define i8* @gep_sub_self() {
; CHECK-LABEL: @gep_sub_self(
; CHECK-NEXT: ret i8* getelementptr (i8, i8* @g, i64 sub (i64 0, i64 ptrtoint (i8* @g to i64)))
;
%p.int = ptrtoint i8* @g to i64
%p.int.neg = sub i64 0, %p.int
%p1 = getelementptr i8, i8* @g, i64 %p.int.neg
ret i8* %p1
}
define i8* @gep_sub_self_plus_addr(i64 %addr) {
; CHECK-LABEL: @gep_sub_self_plus_addr(
; CHECK-NEXT: [[P2:%.*]] = getelementptr i8, i8* getelementptr (i8, i8* @g, i64 sub (i64 0, i64 ptrtoint (i8* @g to i64))), i64 [[ADDR:%.*]]
; CHECK-NEXT: ret i8* [[P2]]
;
%p.int = ptrtoint i8* @g to i64
%p.int.neg = sub i64 0, %p.int
%p1 = getelementptr i8, i8* @g, i64 %p.int.neg
%p2 = getelementptr i8, i8* %p1, i64 %addr
ret i8* %p2
}
define i8* @gep_plus_addr_sub_self(i64 %addr) {
; CHECK-LABEL: @gep_plus_addr_sub_self(
; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, i8* @g, i64 [[ADDR:%.*]]
; CHECK-NEXT: [[P2:%.*]] = getelementptr i8, i8* [[P1]], i64 sub (i64 0, i64 ptrtoint (i8* @g to i64))
; CHECK-NEXT: ret i8* [[P2]]
;
%p.int = ptrtoint i8* @g to i64
%p.int.neg = sub i64 0, %p.int
%p1 = getelementptr i8, i8* @g, i64 %addr
%p2 = getelementptr i8, i8* %p1, i64 %p.int.neg
ret i8* %p2
}
define i8* @gep_plus_addr_sub_self_in_loop() {
; CHECK-LABEL: @gep_plus_addr_sub_self_in_loop(
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[ADDR:%.*]] = call i64 @get.i64()
; CHECK-NEXT: [[P2:%.*]] = getelementptr i8, i8* getelementptr (i8, i8* @g, i64 sub (i64 0, i64 ptrtoint (i8* @g to i64))), i64 [[ADDR]]
; CHECK-NEXT: call void @use.ptr(i8* [[P2]])
; CHECK-NEXT: br label [[LOOP]]
;
%p.int = ptrtoint i8* @g to i64
%p.int.neg = sub i64 0, %p.int
br label %loop
loop:
%addr = call i64 @get.i64()
%p1 = getelementptr i8, i8* @g, i64 %addr
%p2 = getelementptr i8, i8* %p1, i64 %p.int.neg
call void @use.ptr(i8* %p2)
br label %loop
}
define i8* @gep_sub_other() {
; CHECK-LABEL: @gep_sub_other(
; CHECK-NEXT: ret i8* getelementptr (i8, i8* @g, i64 sub (i64 0, i64 ptrtoint (i8* @g2 to i64)))
;
%p.int = ptrtoint i8* @g2 to i64
%p.int.neg = sub i64 0, %p.int
%p1 = getelementptr i8, i8* @g, i64 %p.int.neg
ret i8* %p1
}
define i64 @gep_sub_other_to_int() {
; CHECK-LABEL: @gep_sub_other_to_int(
; CHECK-NEXT: ret i64 sub (i64 ptrtoint (i8* @g to i64), i64 ptrtoint (i8* @g2 to i64))
;
%p.int = ptrtoint i8* @g2 to i64
%p.int.neg = sub i64 0, %p.int
%p1 = getelementptr i8, i8* @g, i64 %p.int.neg
%p1.int = ptrtoint i8* %p1 to i64
ret i64 %p1.int
}
|
