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
|
--- |
; pr37472
; These test verify that shrink-wrap does not set the restore point
; to a position where the stack might still be accessed by a load or store
; RUN: llc -x=mir -simplify-mir -run-pass=shrink-wrap -o - %s | FileCheck %s
; RUN: llc -x=mir -simplify-mir -passes='shrink-wrap' -o - %s | FileCheck %s
; CHECK: name: compiler_pop_stack
; CHECK: frameInfo:
; CHECK: savePoint: '%bb.1'
; CHECK: restorePoint: '%bb.7'
; CHECK: name: compiler_pop_stack_no_memoperands
; CHECK: frameInfo:
; CHECK: savePoint: '%bb.1'
; CHECK: restorePoint: '%bb.7'
; CHECK: name: f
; CHECK: frameInfo:
; CHECK: savePoint: '%bb.2'
; CHECK-NEXT: restorePoint: '%bb.4'
; CHECK-NEXT: stack:
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64"
%struct.S = type { i32, i32 }
; Test from: https://bugs.llvm.org/show_bug.cgi?id=42136
define void @compiler_pop_stack(i32 %num, i32 %dec) {
entry:
%rstack = alloca [16 x i32], align 4
%idxprom = zext i32 %dec to i64
%arrayidx2 = getelementptr inbounds [16 x i32], ptr %rstack, i64 0, i64 %idxprom
%sunkaddr = mul i64 %idxprom, 4
%sunkaddr2 = getelementptr inbounds i8, ptr %rstack, i64 %sunkaddr
ret void
}
define void @compiler_pop_stack_no_memoperands(i32 %num, i32 %dec) {
entry:
%rstack = alloca [16 x i32], align 4
%idxprom = zext i32 %dec to i64
%arrayidx2 = getelementptr inbounds [16 x i32], ptr %rstack, i64 0, i64 %idxprom
%sunkaddr = mul i64 %idxprom, 4
%sunkaddr2 = getelementptr inbounds i8, ptr %rstack, i64 %sunkaddr
ret void
}
; Test from: https://bugs.llvm.org/show_bug.cgi?id=37472
define i32 @f(ptr nocapture %arg, i32 %arg1) {
bb:
%tmp = alloca [4 x i8], align 1
%tmp6 = getelementptr inbounds [4 x i8], ptr %tmp, i64 0, i64 3
%sunkaddr = getelementptr inbounds i8, ptr %tmp, i64 3
%tmp14 = getelementptr inbounds %struct.S, ptr %arg, i64 0, i32 1
ret i32 0
}
...
---
name: compiler_pop_stack
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$w0' }
frameInfo:
maxAlignment: 4
maxCallFrameSize: 0
localFrameSize: 64
stack:
- { id: 0, name: rstack, size: 64, alignment: 4, stack-id: default, local-offset: -64 }
machineFunctionInfo: {}
body: |
bb.0:
liveins: $w0
dead $wzr = SUBSWri renamable $w0, 2, 0, implicit-def $nzcv
Bcc 3, %bb.6, implicit killed $nzcv
B %bb.1
bb.1:
liveins: $w0
STRWui killed renamable $w0, %stack.0.rstack, 0 :: (volatile store (s32) into %ir.rstack)
renamable $w9 = MOVi32imm 1
renamable $x8 = ADDXri %stack.0.rstack, 0, 0
bb.2:
successors: %bb.3(0x30000000), %bb.4(0x50000000)
liveins: $w9, $x8
renamable $w10 = SUBWri renamable $w9, 1, 0, implicit-def $x10
renamable $w11 = LDRWroW renamable $x8, renamable $w10, 0, 1 :: (volatile load (s32) from %ir.arrayidx2)
CBNZW renamable $w11, %bb.4
bb.3:
liveins: $x8, $x10
renamable $w9 = COPY renamable $w10, implicit killed $x10
B %bb.5
bb.4:
liveins: $w9, $w11, $x8, $x10
STRWroX killed renamable $w11, renamable $x8, killed renamable $x10, 0, 1 :: (volatile store (s32) into %ir.sunkaddr2)
bb.5:
successors: %bb.6(0x04000000), %bb.2(0x7c000000)
liveins: $w9, $x8
CBNZW renamable $w9, %bb.2
B %bb.6
bb.6:
RET_ReallyLR
...
# Like compiler_pop_stack, but with the memory operands dropped from the
# machine instructions.
---
name: compiler_pop_stack_no_memoperands
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$w0' }
frameInfo:
maxAlignment: 4
maxCallFrameSize: 0
localFrameSize: 64
stack:
- { id: 0, name: rstack, size: 64, alignment: 4, stack-id: default, local-offset: -64 }
machineFunctionInfo: {}
body: |
bb.0:
liveins: $w0
dead $wzr = SUBSWri renamable $w0, 2, 0, implicit-def $nzcv
Bcc 3, %bb.6, implicit killed $nzcv
B %bb.1
bb.1:
liveins: $w0
STRWui killed renamable $w0, %stack.0.rstack, 0
renamable $w9 = MOVi32imm 1
renamable $x8 = ADDXri %stack.0.rstack, 0, 0
bb.2:
successors: %bb.3(0x30000000), %bb.4(0x50000000)
liveins: $w9, $x8
renamable $w10 = SUBWri renamable $w9, 1, 0, implicit-def $x10
renamable $w11 = LDRWroW renamable $x8, renamable $w10, 0, 1
CBNZW renamable $w11, %bb.4
bb.3:
liveins: $x8, $x10
renamable $w9 = COPY renamable $w10, implicit killed $x10
B %bb.5
bb.4:
liveins: $w9, $w11, $x8, $x10
STRWroX killed renamable $w11, renamable $x8, killed renamable $x10, 0, 1
bb.5:
successors: %bb.6(0x04000000), %bb.2(0x7c000000)
liveins: $w9, $x8
CBNZW renamable $w9, %bb.2
B %bb.6
bb.6:
RET_ReallyLR
...
---
name: f
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$w1' }
frameInfo:
maxAlignment: 4
maxCallFrameSize: 0
localFrameSize: 4
stack:
- { id: 0, name: tmp, size: 4, alignment: 4, stack-id: default, local-offset: -4 }
machineFunctionInfo: {}
body: |
bb.0:
successors: %bb.1, %bb.2
liveins: $w1, $x0
dead $wzr = SUBSWri renamable $w1, 4, 0, implicit-def $nzcv
Bcc 9, %bb.2, implicit killed $nzcv
bb.1:
renamable $w0 = MOVi32imm 1
B %bb.5
bb.2:
successors: %bb.3, %bb.4
liveins: $w1, $x0
renamable $w9 = MOVi32imm 67305985
renamable $w8 = ORRWrs $wzr, renamable $w1, 0, implicit-def $x8
STRWui killed renamable $w9, %stack.0.tmp, 0 :: (volatile store (s32) into %ir.tmp)
renamable $x9 = ADDXri %stack.0.tmp, 0, 0
renamable $w10 = LDRBBroX renamable $x9, renamable $x8, 0, 0 :: (volatile load (s8) from %ir.arg)
dead $wzr = SUBSWri killed renamable $w1, 2, 0, implicit-def $nzcv
STRWui killed renamable $w10, renamable $x0, 0 :: (store (s32) into %ir.arg)
Bcc 8, %bb.4, implicit killed $nzcv
B %bb.3
bb.3:
liveins: $x0, $x8, $x9
renamable $w8 = LDRBBroX killed renamable $x9, killed renamable $x8, 0, 0 :: (volatile load (s8) from %ir.sunkaddr)
STRWui killed renamable $w8, killed renamable $x0, 1 :: (store (s32) into %ir.tmp14)
bb.4:
renamable $w0 = COPY $wzr
bb.5:
liveins: $w0
RET_ReallyLR implicit $w0
...
|
