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
|
# RUN: llc %s -run-pass=machine-cp -o - | FileCheck %s --implicit-check-not=DBG_VALUE
## Ensure that when the destination register of a copy instruction is used by a
## DBG_VALUE/DBG_VALUE_LIST, and then that instruction is deleted during copy
## propagation, the debug use is updated to the source register.
##
## Do the same for DBG_PHI instructions.
# CHECK: ![[VAR_V:[0-9]+]] = !DILocalVariable(name: "v"
# CHECK-LABEL: body:
# CHECK: DBG_PHI $r0, 1
# CHECK: DBG_VALUE $r0, $noreg, ![[VAR_V]], !DIExpression()
# CHECK: DBG_VALUE_LIST ![[VAR_V]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_constu, 4, DW_OP_mul, DW_OP_plus, DW_OP_stack_value), $r0, 0
--- |
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "arm-unknown-linux-gnueabi"
%struct.atomic_t.0.6.15.24.48.51.54.57 = type { i32 }
%struct.mm_struct.2.8.17.26.50.53.56.59 = type { %struct.anon.1.7.16.25.49.52.55.58 }
%struct.anon.1.7.16.25.49.52.55.58 = type { i32 }
@dup_mm_err = external dso_local local_unnamed_addr global i32, align 4, !dbg !0
declare dso_local i32 @atomic_long_read(%struct.atomic_t.0.6.15.24.48.51.54.57*) local_unnamed_addr #0
declare dso_local i32 @get_mm_counter(%struct.mm_struct.2.8.17.26.50.53.56.59*, i32) local_unnamed_addr #0
define dso_local i32 @dup_mm() local_unnamed_addr !dbg !16 {
entry:
%call = tail call i32 bitcast (i32 (...)* @kmem_cache_alloc to i32 (i32)*)(i32 0)
br i1 undef, label %cleanup, label %if.end
if.end: ; preds = %entry
%tobool1.not = icmp eq i32 undef, 0
br i1 %tobool1.not, label %if.end3, label %free_pt
if.end3: ; preds = %if.end
call void @llvm.dbg.value(metadata !DIArgList(i32 %call, i32 0), metadata !30, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_constu, 4, DW_OP_mul, DW_OP_plus, DW_OP_stack_value)), !dbg !40
%0 = load volatile i32, i32* undef, align 4
br label %cleanup
free_pt: ; preds = %if.end
store i32 0, i32* undef, align 4
br label %cleanup
cleanup: ; preds = %free_pt, %if.end3, %entry
%retval.0 = phi i32 [ %call, %if.end3 ], [ 0, %entry ], [ 0, %free_pt ]
ret i32 %retval.0
}
declare dso_local i32 @kmem_cache_alloc(...) local_unnamed_addr
declare void @llvm.dbg.label(metadata)
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!14, !15}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "dup_mm_err", scope: !2, file: !3, line: 5, type: !12, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !9, globals: !13, splitDebugInlining: false, nameTableKind: None)
!3 = !DIFile(filename: "machine-cp-updates-dbg-reg.ll", directory: "/")
!4 = !{!5}
!5 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !3, line: 4, baseType: !6, size: 32, elements: !7)
!6 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
!7 = !{!8}
!8 = !DIEnumerator(name: "MM_SHMEMPAGES", value: 0, isUnsigned: true)
!9 = !{!10}
!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 32)
!11 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !12)
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13 = !{!0}
!14 = !{i32 2, !"Debug Info Version", i32 3}
!15 = !{i32 1, !"min_enum_size", i32 4}
!16 = distinct !DISubprogram(name: "dup_mm", scope: !3, file: !3, line: 14, type: !17, scopeLine: 14, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !19)
!17 = !DISubroutineType(types: !18)
!18 = !{!12}
!19 = !{!20, !28, !29}
!20 = !DILocalVariable(name: "mm", scope: !16, file: !3, line: 15, type: !21)
!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !22, size: 32)
!22 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "mm_struct", file: !3, line: 7, size: 32, elements: !23)
!23 = !{!24}
!24 = !DIDerivedType(tag: DW_TAG_member, scope: !22, file: !3, line: 8, baseType: !25, size: 32)
!25 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !22, file: !3, line: 8, size: 32, elements: !26)
!26 = !{!27}
!27 = !DIDerivedType(tag: DW_TAG_member, name: "binfmt", scope: !25, file: !3, line: 9, baseType: !12, size: 32)
!28 = !DILabel(scope: !16, name: "free_pt", file: !3, line: 22)
!29 = !DILabel(scope: !16, name: "fail_nomem", file: !3, line: 24)
!30 = !DILocalVariable(name: "v", arg: 1, scope: !31, file: !3, line: 6, type: !34)
!31 = distinct !DISubprogram(name: "atomic_long_read", scope: !3, file: !3, line: 6, type: !32, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !39)
!32 = !DISubroutineType(types: !33)
!33 = !{!12, !34}
!34 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !35, size: 32)
!35 = !DIDerivedType(tag: DW_TAG_typedef, name: "atomic_t", file: !3, line: 3, baseType: !36)
!36 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, size: 32, elements: !37)
!37 = !{!38}
!38 = !DIDerivedType(tag: DW_TAG_member, name: "counter", scope: !36, file: !3, line: 2, baseType: !12, size: 32)
!39 = !{!30}
!40 = !DILocation(line: 0, scope: !31, inlinedAt: !41)
!41 = distinct !DILocation(line: 12, column: 3, scope: !42, inlinedAt: !48)
!42 = distinct !DISubprogram(name: "get_mm_counter", scope: !3, file: !3, line: 11, type: !43, scopeLine: 11, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !45)
!43 = !DISubroutineType(types: !44)
!44 = !{!22, !21, !12}
!45 = !{!46, !47}
!46 = !DILocalVariable(name: "mm", arg: 1, scope: !42, file: !3, line: 11, type: !21)
!47 = !DILocalVariable(name: "member", arg: 2, scope: !42, file: !3, line: 11, type: !12)
!48 = distinct !DILocation(line: 20, column: 3, scope: !16)
...
---
name: dup_mm
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
registers: []
liveins: []
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 8
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: true
hasCalls: true
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
hasTailCall: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack: []
stack:
- { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '$r4', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []
debugValueSubstitutions: []
constants: []
machineFunctionInfo: {}
body: |
bb.0.entry:
successors: %bb.4(0x40000000), %bb.1(0x40000000)
liveins: $r4, $lr
$sp = frame-setup STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r4, killed $lr
frame-setup CFI_INSTRUCTION def_cfa_offset 8
frame-setup CFI_INSTRUCTION offset $lr, -4
frame-setup CFI_INSTRUCTION offset $r4, -8
renamable $r4 = MOVi 0, 14 /* CC::al */, $noreg, $noreg
$r0 = MOVi 0, 14 /* CC::al */, $noreg, $noreg
BL @kmem_cache_alloc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit $r0, implicit-def $sp, implicit-def $r0
CMPri renamable $r4, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
Bcc %bb.4, 1 /* CC::ne */, killed $cpsr
bb.1.if.end:
successors: %bb.2(0x30000000), %bb.3(0x50000000)
liveins: $r0
renamable $r4 = MOVi 0, 14 /* CC::al */, $noreg, $noreg
CMPri renamable $r4, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr
Bcc %bb.3, 1 /* CC::ne */, killed $cpsr
bb.2.if.end3:
liveins: $r0
dead renamable $r1 = LDRi12 undef renamable $r0, 0, 14 /* CC::al */, $noreg :: (volatile load (s32) from `i32* undef`)
renamable $r4 = COPY killed renamable $r0
DBG_PHI $r4, 1
DBG_VALUE $r4, $noreg, !30, !DIExpression(), debug-location !40
DBG_VALUE_LIST !30, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_constu, 4, DW_OP_mul, DW_OP_plus, DW_OP_stack_value), $r4, 0, debug-location !40
$r0 = COPY killed renamable $r4
$sp = frame-destroy LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $pc, implicit $r0
bb.3.free_pt:
successors: %bb.4(0x80000000)
liveins: $r4
STRi12 renamable $r4, undef renamable $r0, 0, 14 /* CC::al */, $noreg :: (store (s32) into `i32* undef`)
bb.4.cleanup:
liveins: $r4
$r0 = COPY killed renamable $r4
$sp = frame-destroy LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $pc, implicit $r0
...
|
