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
|
# RUN: llc -start-after=livedebugvalues --filetype=obj %s -o - \
# RUN: | llvm-dwarfdump -v -name=parama - | FileCheck %s
#
# Generated with -O2, llc -stop-after=livedebugvalues, with IR modified from
# this source:
#
# int globa, globb;
# void ext();
# static void set(int parama, int paramb) {
# globa = parama;
# globb = paramb;
# }
# void funone(int one, int two) {
# two = two + one;
# // 'two = ...' sunk between the inlined assignments to globa and globa.
# set(one, two);
# if (two > 0)
# return ext();
# }
# void funtwo(int one, int two) {
# two = one + two;
# // 'two = ...' sunk between the inlined assignments to globa and globa,
# // and rdi is clobbered by the sunk 'two = ...'.
# set(one, two);
# if (one < two)
# return ext();
# }
#
# Check that the 'parama' is available for the entire inlined scope in funone,
# and that it is unavailable in the second DW_AT_ranges segment of the inlined
# scope in funtwo. In both cases the inlined scope 'set' is intrerrupted by an
# instruction from the calling function.
#
# Except for 'parama', all DILocalVariable metadata has been removed.
#
# Ignore first entry (abstract), we want to look at the concrete instances.
# CHECK: DW_TAG_formal_parameter [
# CHECK: DW_TAG_formal_parameter [
# CHECK-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_reg5 RDI)
# CHECK-NEXT: DW_AT_abstract_origin {{.*}} "parama"
# CHECK: DW_TAG_formal_parameter [
# CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset]
# CHECK-NEXT: [0x{{[0-9a-b]+}}, 0x{{[0-9a-b]+}})
# CHECK-NEXT: DW_AT_abstract_origin {{.*}} "parama"
--- |
target triple = "x86_64-unknown-linux-gnu"
@globa = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
@globb = dso_local local_unnamed_addr global i32 0, align 4, !dbg !10
declare !dbg !6 dso_local void @ext(...) local_unnamed_addr
declare void @llvm.dbg.value(metadata, metadata, metadata)
define dso_local void @funone(i32 %one, i32 %two) local_unnamed_addr !dbg !17 {
entry:
call void @llvm.dbg.value(metadata i32 %one, metadata !20, metadata !DIExpression()), !dbg !23
store i32 %one, i32* @globa, align 4, !dbg !25
%add = add nsw i32 %two, %one, !dbg !30
store i32 %add, i32* @globb, align 4, !dbg !31
%cmp = icmp sgt i32 %add, 0, !dbg !32
br i1 %cmp, label %if.then, label %if.end, !dbg !34
if.then: ; preds = %entry
tail call void (...) @ext(), !dbg !35
ret void, !dbg !36
if.end: ; preds = %entry
ret void, !dbg !36
}
define dso_local void @funtwo(i32 %one, i32 %two) local_unnamed_addr !dbg !37 {
entry:
call void @llvm.dbg.value(metadata i32 %one, metadata !20, metadata !DIExpression()), !dbg !41
store i32 %one, i32* @globa, align 4, !dbg !43
%add = add nsw i32 %two, %one, !dbg !44
store i32 %add, i32* @globb, align 4, !dbg !45
%cmp = icmp sgt i32 %two, 0, !dbg !46
br i1 %cmp, label %if.then, label %if.end, !dbg !48
if.then: ; preds = %entry
tail call void (...) @ext(), !dbg !49
ret void, !dbg !50
if.end: ; preds = %entry
ret void, !dbg !50
}
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!13, !14, !15}
!llvm.ident = !{!16}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "globa", scope: !2, file: !3, line: 16, type: !12, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !9, splitDebugInlining: false, nameTableKind: None)
!3 = !DIFile(filename: "test.c", directory: "/")
!4 = !{}
!5 = !{!6}
!6 = !DISubprogram(name: "ext", scope: !3, file: !3, line: 17, type: !7, spFlags: DISPFlagOptimized, retainedNodes: !4)
!7 = !DISubroutineType(types: !8)
!8 = !{null, null}
!9 = !{!0, !10}
!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression())
!11 = distinct !DIGlobalVariable(name: "globb", scope: !2, file: !3, line: 16, type: !12, isLocal: false, isDefinition: true)
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13 = !{i32 7, !"Dwarf Version", i32 4}
!14 = !{i32 2, !"Debug Info Version", i32 3}
!15 = !{i32 1, !"wchar_size", i32 4}
!16 = !{!"clang version 11.0.0"}
!17 = distinct !DISubprogram(name: "funone", scope: !3, file: !3, line: 22, type: !18, scopeLine: 22, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !4)
!18 = !DISubroutineType(types: !19)
!19 = !{null, !12, !12}
!20 = !DILocalVariable(name: "parama", arg: 1, scope: !21, file: !3, line: 18, type: !12)
!21 = distinct !DISubprogram(name: "set", scope: !3, file: !3, line: 18, type: !18, scopeLine: 18, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !22)
!22 = !{!20}
!23 = !DILocation(line: 0, scope: !21, inlinedAt: !24)
!24 = distinct !DILocation(line: 24, column: 3, scope: !17)
!25 = !DILocation(line: 19, column: 9, scope: !21, inlinedAt: !24)
!30 = !DILocation(line: 23, column: 13, scope: !17)
!31 = !DILocation(line: 20, column: 9, scope: !21, inlinedAt: !24)
!32 = !DILocation(line: 25, column: 11, scope: !33)
!33 = distinct !DILexicalBlock(scope: !17, file: !3, line: 25, column: 7)
!34 = !DILocation(line: 25, column: 7, scope: !17)
!35 = !DILocation(line: 26, column: 12, scope: !33)
!36 = !DILocation(line: 27, column: 1, scope: !17)
!37 = distinct !DISubprogram(name: "funtwo", scope: !3, file: !3, line: 28, type: !18, scopeLine: 28, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !38)
!38 = !{}
!41 = !DILocation(line: 0, scope: !21, inlinedAt: !42)
!42 = distinct !DILocation(line: 30, column: 3, scope: !37)
!43 = !DILocation(line: 19, column: 9, scope: !21, inlinedAt: !42)
!44 = !DILocation(line: 29, column: 13, scope: !37)
!45 = !DILocation(line: 20, column: 9, scope: !21, inlinedAt: !42)
!46 = !DILocation(line: 31, column: 11, scope: !47)
!47 = distinct !DILexicalBlock(scope: !37, file: !3, line: 31, column: 7)
!48 = !DILocation(line: 31, column: 7, scope: !37)
!49 = !DILocation(line: 32, column: 12, scope: !47)
!50 = !DILocation(line: 33, column: 1, scope: !37)
...
---
name: funone
body: |
bb.0.entry:
successors: %bb.2(0x50000000), %bb.1(0x30000000)
liveins: $edi, $esi
DBG_VALUE $edi, $noreg, !20, !DIExpression(), debug-location !23
MOV32mr $rip, 1, $noreg, @globa, $noreg, renamable $edi, debug-location !25 :: (store (s32) into @globa)
renamable $esi = ADD32rr killed renamable $esi, killed renamable $edi, implicit-def $eflags, debug-location !32
MOV32mr $rip, 1, $noreg, @globb, $noreg, killed renamable $esi, debug-location !31 :: (store (s32) into @globb)
JCC_1 %bb.1, 14, implicit $eflags, debug-location !34
bb.2.if.then:
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !35
TAILJMPd64 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit killed $al, debug-location !35
bb.1.if.end:
RET64 debug-location !36
...
---
name: funtwo
body: |
bb.0.entry:
successors: %bb.2(0x50000000), %bb.1(0x30000000)
liveins: $edi, $esi
DBG_VALUE $edi, $noreg, !20, !DIExpression(), debug-location !41
MOV32mr $rip, 1, $noreg, @globa, $noreg, renamable $edi, debug-location !43 :: (store (s32) into @globa)
renamable $edi = nsw ADD32rr killed renamable $edi, renamable $esi, implicit-def dead $eflags, debug-location !44
MOV32mr $rip, 1, $noreg, @globb, $noreg, killed renamable $edi, debug-location !45 :: (store (s32) into @globb)
TEST32rr killed renamable $esi, renamable $esi, implicit-def $eflags, debug-location !46
JCC_1 %bb.1, 14, implicit $eflags, debug-location !48
bb.2.if.then:
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !49
TAILJMPd64 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit killed $al, debug-location !49
bb.1.if.end:
RET64 debug-location !50
...
|
