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
235
236
237
238
239
| --- |
; RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
; Created from:
; void sink(int a);
; void __attribute((always_inline)) f(int a) { sink(a); }
; void foo(int i) {
; f(i);
; if (i)
; f(i);
; f(i);
; }
;
; This test verifies that LiveDebugValues doesn't propagate DBG_VALUEs into
; basic blocks that are beyond the scope of the source variable.
;
; CHECK: ![[F_SP:[0-9]+]] = distinct !DISubprogram(name: "f", {{.*}})
; CHECK: ![[A_VAR:[0-9]+]] = !DILocalVariable(name: "a",{{.*}})
; CHECK: ![[I_VAR:[0-9]+]] = !DILocalVariable(name: "i",{{.*}})
; CHECK: ![[I_LOC:[0-9]+]] = !DILocation(line: 4, column: 14, scope: !{{[0-9]+}})
; CHECK: ![[INLCS1:[0-9]+]] = !DILocation(line: 3, column: 41, scope: ![[F_SP]], inlinedAt: ![[CS1:[0-9]+]])
; CHECK: ![[CS1]] = distinct !DILocation(line: 5, column: 3, scope: !{{[0-9]+}})
; CHECK: ![[INLCS2:[0-9]+]] = !DILocation(line: 3, column: 41, scope: ![[F_SP]], inlinedAt: ![[CS2:[0-9]+]])
; CHECK: ![[CS2]] = distinct !DILocation(line: 7, column: 5, scope: !{{[0-9]+}})
; CHECK: ![[INLCS3:[0-9]+]] = !DILocation(line: 3, column: 41, scope: ![[F_SP]], inlinedAt: ![[CS3:[0-9]+]])
; CHECK: ![[CS3]] = distinct !DILocation(line: 8, column: 3, scope: !{{[0-9]+}})
;
; CHECK: bb.1.if.then:
; CHECK: DBG_VALUE $ebx, $noreg, ![[I_VAR]], !DIExpression(), debug-location ![[I_LOC]]
; CHECK-NOT: DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location
; CHECK: DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location ![[INLCS2]]
; CHECK: bb.2.if.end:
; CHECK: DBG_VALUE $ebx, $noreg, ![[I_VAR]], !DIExpression(), debug-location ![[I_LOC]]
; CHECK-NOT: DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location
; CHECK: DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location ![[INLCS3]]
;
; ModuleID = 'livedebugvalues-limit.ll'
source_filename = "livedebugvalues-limit.c"
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx"
; Function Attrs: alwaysinline nounwind ssp uwtable
define void @f(i32 %a) local_unnamed_addr #0 !dbg !7 {
entry:
tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !12, metadata !13), !dbg !14
tail call void @sink(i32 %a) #4, !dbg !15
ret void, !dbg !16
}
declare void @sink(i32) local_unnamed_addr
; Function Attrs: nounwind ssp uwtable
define void @foo(i32 %i) local_unnamed_addr #2 !dbg !17 {
entry:
tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !19, metadata !13), !dbg !20
tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !21
tail call void @sink(i32 %i) #4, !dbg !23
%tobool = icmp eq i32 %i, 0, !dbg !24
br i1 %tobool, label %if.end, label %if.then, !dbg !26
if.then: ; preds = %entry
tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !27
tail call void @sink(i32 %i) #4, !dbg !29
br label %if.end, !dbg !30
if.end: ; preds = %if.then, %entry
tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !31
tail call void @sink(i32 %i) #4, !dbg !33
ret void, !dbg !34
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #4
attributes #0 = { alwaysinline nounwind ssp uwtable }
attributes #2 = { nounwind ssp uwtable }
attributes #3 = { nounwind readnone }
attributes #4 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "livedebugvalues-limit.c", directory: "/Volumes/Fusion/Data/llvm")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"PIC Level", i32 2}
!6 = !{!"clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)"}
!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
!8 = !DISubroutineType(types: !9)
!9 = !{null, !10}
!10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!11 = !{!12}
!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 3, type: !10)
!13 = !DIExpression()
!14 = !DILocation(line: 3, column: 41, scope: !7)
!15 = !DILocation(line: 3, column: 46, scope: !7)
!16 = !DILocation(line: 3, column: 55, scope: !7)
!17 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !18)
!18 = !{!19}
!19 = !DILocalVariable(name: "i", arg: 1, scope: !17, file: !1, line: 4, type: !10)
!20 = !DILocation(line: 4, column: 14, scope: !17)
!21 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !22)
!22 = distinct !DILocation(line: 5, column: 3, scope: !17)
!23 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !22)
!24 = !DILocation(line: 6, column: 7, scope: !25)
!25 = distinct !DILexicalBlock(scope: !17, file: !1, line: 6, column: 7)
!26 = !DILocation(line: 6, column: 7, scope: !17)
!27 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !28)
!28 = distinct !DILocation(line: 7, column: 5, scope: !25)
!29 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !28)
!30 = !DILocation(line: 7, column: 5, scope: !25)
!31 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !32)
!32 = distinct !DILocation(line: 8, column: 3, scope: !17)
!33 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !32)
!34 = !DILocation(line: 9, column: 1, scope: !17)
...
---
name: f
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
liveins:
- { reg: '$edi' }
calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx',
'$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15',
'$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d',
'$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ]
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 8
offsetAdjustment: 0
maxAlignment: 0
adjustsStack: false
hasCalls: false
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
fixedStack:
- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16 }
body: |
bb.0.entry:
liveins: $edi, $rbp
frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
CFI_INSTRUCTION offset $rbp, -16
$rbp = frame-setup MOV64rr $rsp
CFI_INSTRUCTION def_cfa_register $rbp
DBG_VALUE $edi, _, !12, !13, debug-location !14
$rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !15
TAILJMPd64 @sink, csr_64, implicit $rsp, implicit $rsp, implicit $edi, debug-location !15
...
---
name: foo
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
liveins:
- { reg: '$edi' }
calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx',
'$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15',
'$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d',
'$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ]
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 24
offsetAdjustment: -8
maxAlignment: 0
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
fixedStack:
- { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$rbx' }
- { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16 }
body: |
bb.0.entry:
successors: %bb.2.if.end, %bb.1.if.then
liveins: $edi, $rbx, $rbp
frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
CFI_INSTRUCTION offset $rbp, -16
$rbp = frame-setup MOV64rr $rsp
CFI_INSTRUCTION def_cfa_register $rbp
frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION offset $rbx, -24
DBG_VALUE $edi, _, !19, !13, debug-location !20
$ebx = MOV32rr $edi
DBG_VALUE $ebx, _, !12, !13, debug-location !21
DBG_VALUE $ebx, _, !19, !13, debug-location !20
CALL64pcrel32 @sink, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, debug-location !23
TEST32rr $ebx, $ebx, implicit-def $eflags, debug-location !24
JCC_1 %bb.2.if.end, 4, implicit $eflags
bb.1.if.then:
successors: %bb.2.if.end
liveins: $ebx, $rbp
DBG_VALUE $ebx, _, !19, !13, debug-location !20
DBG_VALUE $ebx, _, !12, !13, debug-location !27
$edi = MOV32rr $ebx, debug-location !29
CALL64pcrel32 @sink, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, debug-location !29
bb.2.if.end:
liveins: $ebx, $rbp
DBG_VALUE $ebx, _, !19, !13, debug-location !20
$edi = MOV32rr killed $ebx, debug-location !33
$rsp = ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !33
DBG_VALUE $ebx, _, !12, !13, debug-location !31
$rbx = POP64r implicit-def $rsp, implicit $rsp, debug-location !33
$rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !33
TAILJMPd64 @sink, csr_64, implicit $rsp, implicit $rsp, implicit $edi, debug-location !33
...
|