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
| # RUN: llc -o - %s -start-after=patchable-function -O0 | FileCheck %s
# Generated from the source file pr19307.cc:
# #include <string>
# void parse_range(unsigned long long &offset, unsigned long long &limit,
# std::string range) {
# if (range.compare(0, 6, "items=") != 0 || range[6] == '-')
# offset = 1;
# range.erase(0, 6);
# limit = 2;
# }
# with "clang++ -S -emit-llvm -O0 -g pr19307.cc"
#
# Location of "range" string is spilled from %rdx to stack and is
# addressed via %rbp.
# CHECK: movq %rdx, {{[-0-9]+}}(%rbp)
# CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]]:
# This location should be valid until the end of the function.
#
# Verify that we have proper range in debug_loc section:
# CHECK: .Ldebug_loc{{[0-9]+}}:
# CHECK: DW_OP_breg1
# CHECK: .quad [[START_LABEL]]-.Lfunc_begin0
# CHECK-NEXT: .quad .Lfunc_end0-.Lfunc_begin0
# CHECK: DW_OP_breg6
# CHECK: DW_OP_deref
--- |
target triple = "x86_64-unknown-linux-gnu"
%"class.std::basic_string" = type { %"struct.std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" }
%"struct.std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" = type { i8* }
@.str = private unnamed_addr constant [7 x i8] c"items=\00", align 1
; Function Attrs: uwtable
define void @_Z11parse_rangeRyS_Ss(i64* %offset, i64* %limit, %"class.std::basic_string"* %range) #0 !dbg !34 {
entry:
%offset.addr = alloca i64*, align 8
%limit.addr = alloca i64*, align 8
store i64* %offset, i64** %offset.addr, align 8
call void @llvm.dbg.declare(metadata i64** %offset.addr, metadata !41, metadata !DIExpression()), !dbg !42
store i64* %limit, i64** %limit.addr, align 8
call void @llvm.dbg.declare(metadata i64** %limit.addr, metadata !43, metadata !DIExpression()), !dbg !42
call void @llvm.dbg.declare(metadata %"class.std::basic_string"* %range, metadata !44, metadata !DIExpression(DW_OP_deref)), !dbg !45
%call = call i32 @_ZNKSs7compareEmmPKc(%"class.std::basic_string"* %range, i64 0, i64 6, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i32 0, i32 0)), !dbg !46
%cmp = icmp ne i32 %call, 0, !dbg !46
br i1 %cmp, label %if.then, label %lor.lhs.false, !dbg !46
lor.lhs.false: ; preds = %entry
%call1 = call i8* @_ZNSsixEm(%"class.std::basic_string"* %range, i64 6), !dbg !48
%0 = load i8, i8* %call1, !dbg !48
%conv = sext i8 %0 to i32, !dbg !48
%cmp2 = icmp eq i32 %conv, 45, !dbg !48
br i1 %cmp2, label %if.then, label %if.end, !dbg !48
if.then: ; preds = %lor.lhs.false, %entry
%1 = load i64*, i64** %offset.addr, align 8, !dbg !50
store i64 1, i64* %1, align 8, !dbg !50
br label %if.end, !dbg !50
if.end: ; preds = %if.then, %lor.lhs.false
%call3 = call %"class.std::basic_string"* @_ZNSs5eraseEmm(%"class.std::basic_string"* %range, i64 0, i64 6), !dbg !51
%2 = load i64*, i64** %limit.addr, align 8, !dbg !52
store i64 2, i64* %2, align 8, !dbg !52
ret void, !dbg !53
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare i32 @_ZNKSs7compareEmmPKc(%"class.std::basic_string"*, i64, i64, i8*) #2
declare i8* @_ZNSsixEm(%"class.std::basic_string"*, i64) #2
declare %"class.std::basic_string"* @_ZNSs5eraseEmm(%"class.std::basic_string"*, i64, i64) #2
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #3
attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone speculatable }
attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!31, !32}
!llvm.ident = !{!33}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.5.0 (209308)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, globals: !2, imports: !11)
!1 = !DIFile(filename: "pr19307.cc", directory: "/llvm_cmake_gcc")
!2 = !{}
!3 = !{!4, !6, !8}
!4 = !DICompositeType(tag: DW_TAG_structure_type, file: !5, line: 83, flags: DIFlagFwdDecl, identifier: "_ZTS11__mbstate_t")
!5 = !DIFile(filename: "/usr/include/wchar.h", directory: "/llvm_cmake_gcc")
!6 = !DICompositeType(tag: DW_TAG_structure_type, name: "lconv", file: !7, line: 54, flags: DIFlagFwdDecl, identifier: "_ZTS5lconv")
!7 = !DIFile(filename: "/usr/include/locale.h", directory: "/llvm_cmake_gcc")
!8 = !DICompositeType(tag: DW_TAG_class_type, name: "basic_string<char, std::char_traits<char>, std::allocator<char> >", scope: !10, file: !9, line: 1134, flags: DIFlagFwdDecl, identifier: "_ZTSSs")
!9 = !DIFile(filename: "/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/bits/basic_string.tcc", directory: "/llvm_cmake_gcc")
!10 = !DINamespace(name: "std", scope: null)
!11 = !{!12, !15, !18, !22, !27, !30}
!12 = !DIImportedEntity(tag: DW_TAG_imported_module, scope: !13, entity: !14, file: !1, line: 57)
!13 = !DINamespace(name: "__gnu_debug", scope: null)
!14 = !DINamespace(name: "__debug", scope: !10)
!15 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !10, entity: !16, file: !1, line: 66)
!16 = !DIDerivedType(tag: DW_TAG_typedef, name: "mbstate_t", file: !5, line: 106, baseType: !17)
!17 = !DIDerivedType(tag: DW_TAG_typedef, name: "__mbstate_t", file: !5, line: 95, baseType: !4)
!18 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !10, entity: !19, file: !1, line: 141)
!19 = !DIDerivedType(tag: DW_TAG_typedef, name: "wint_t", file: !20, line: 141, baseType: !21)
!20 = !DIFile(filename: "/llvm_cmake_gcc/bin/../lib/clang/3.5.0/include/stddef.h", directory: "/llvm_cmake_gcc")
!21 = !DIBasicType(name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
!22 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !23, entity: !24, file: !1, line: 42)
!23 = !DINamespace(name: "__gnu_cxx", scope: null)
!24 = !DIDerivedType(tag: DW_TAG_typedef, name: "size_t", scope: !10, file: !25, line: 155, baseType: !26)
!25 = !DIFile(filename: "/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/x86_64-linux-gnu/bits/c++config.h", directory: "/llvm_cmake_gcc")
!26 = !DIBasicType(name: "long unsigned int", size: 64, align: 64, encoding: DW_ATE_unsigned)
!27 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !23, entity: !28, file: !1, line: 43)
!28 = !DIDerivedType(tag: DW_TAG_typedef, name: "ptrdiff_t", scope: !10, file: !25, line: 156, baseType: !29)
!29 = !DIBasicType(name: "long int", size: 64, align: 64, encoding: DW_ATE_signed)
!30 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !10, entity: !6, file: !1, line: 55)
!31 = !{i32 2, !"Dwarf Version", i32 4}
!32 = !{i32 2, !"Debug Info Version", i32 3}
!33 = !{!"clang version 3.5.0 (209308)"}
!34 = distinct !DISubprogram(name: "parse_range", linkageName: "_Z11parse_rangeRyS_Ss", scope: !1, file: !1, line: 3, type: !35, isLocal: false, isDefinition: true, scopeLine: 4, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!35 = !DISubroutineType(types: !36)
!36 = !{null, !37, !37, !39}
!37 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !38)
!38 = !DIBasicType(name: "long long unsigned int", size: 64, align: 64, encoding: DW_ATE_unsigned)
!39 = !DIDerivedType(tag: DW_TAG_typedef, name: "string", scope: !10, file: !40, line: 65, baseType: !8)
!40 = !DIFile(filename: "/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/bits/stringfwd.h", directory: "/llvm_cmake_gcc")
!41 = !DILocalVariable(name: "offset", arg: 1, scope: !34, file: !1, line: 3, type: !37)
!42 = !DILocation(line: 3, scope: !34)
!43 = !DILocalVariable(name: "limit", arg: 2, scope: !34, file: !1, line: 3, type: !37)
!44 = !DILocalVariable(name: "range", arg: 3, scope: !34, file: !1, line: 4, type: !39)
!45 = !DILocation(line: 4, scope: !34)
!46 = !DILocation(line: 5, scope: !47)
!47 = distinct !DILexicalBlock(scope: !34, file: !1, line: 5)
!48 = !DILocation(line: 5, scope: !49)
!49 = distinct !DILexicalBlock(scope: !47, file: !1, line: 5)
!50 = !DILocation(line: 6, scope: !47)
!51 = !DILocation(line: 7, scope: !34)
!52 = !DILocation(line: 8, scope: !34)
!53 = !DILocation(line: 9, scope: !34)
...
---
name: _Z11parse_rangeRyS_Ss
alignment: 16
tracksRegLiveness: true
liveins:
- { reg: '$rdi' }
- { reg: '$rsi' }
- { reg: '$rdx' }
frameInfo:
stackSize: 40
offsetAdjustment: -32
maxAlignment: 8
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
fixedStack:
- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default }
stack:
- { id: 0, name: offset.addr, offset: -24, size: 8, alignment: 8, stack-id: default,
debug-info-variable: '!41', debug-info-expression: '!DIExpression()',
debug-info-location: '!42' }
- { id: 1, name: limit.addr, offset: -32, size: 8, alignment: 8, stack-id: default,
debug-info-variable: '!43', debug-info-expression: '!DIExpression()',
debug-info-location: '!42' }
- { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: default }
- { id: 3, type: spill-slot, offset: -48, size: 8, alignment: 8, stack-id: default }
body: |
bb.0.entry:
liveins: $rdi, $rsi, $rdx
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
$rsp = frame-setup SUB64ri8 $rsp, 32, implicit-def dead $eflags
$eax = XOR32rr undef $eax, undef $eax, implicit-def $eflags, implicit-def $rax
MOV64mr $rbp, 1, $noreg, -8, $noreg, killed renamable $rdi :: (store 8 into %ir.offset.addr)
MOV64mr $rbp, 1, $noreg, -16, $noreg, killed renamable $rsi :: (store 8 into %ir.limit.addr)
DBG_VALUE renamable $rdx, 0, !44, !DIExpression(DW_OP_deref), debug-location !45
$rdi = MOV64rr $rdx, debug-location !46
$rsi = MOV64rr killed $rax, debug-location !46
$eax = MOV32ri 6, implicit-def $rax, debug-location !46
MOV64mr $rbp, 1, $noreg, -24, $noreg, killed $rdx :: (store 8 into %stack.2)
DBG_VALUE $rbp, 0, !44, !DIExpression(DW_OP_constu, 24, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !45
$rdx = MOV64rr killed $rax, debug-location !46
renamable $rcx = MOV64ri @.str, debug-location !46
CALL64pcrel32 @_ZNKSs7compareEmmPKc, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit killed $rsi, implicit killed $rdx, implicit killed $rcx, implicit-def $eax, debug-location !46
CMP32ri8 killed renamable $eax, 0, implicit-def $eflags, debug-location !46
JCC_1 %bb.2, 5, implicit $eflags, debug-location !46
bb.1.lor.lhs.false:
DBG_VALUE $rbp, 0, !44, !DIExpression(DW_OP_constu, 24, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !45
$rdi = MOV64rm $rbp, 1, $noreg, -24, $noreg :: (load 8 from %stack.2)
$esi = MOV32ri 6, implicit-def $rsi, debug-location !48
CALL64pcrel32 @_ZNSsixEm, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit killed $rsi, implicit-def $rax, debug-location !48
renamable $ecx = MOVSX32rm8 killed renamable $rax, 1, $noreg, 0, $noreg, debug-location !48 :: (load 1 from %ir.call1)
CMP32ri8 killed renamable $ecx, 45, implicit-def $eflags, debug-location !48
JCC_1 %bb.3, 5, implicit $eflags, debug-location !48
bb.2.if.then:
DBG_VALUE $rbp, 0, !44, !DIExpression(DW_OP_constu, 24, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !45
renamable $rax = MOV64rm $rbp, 1, $noreg, -8, $noreg, debug-location !50 :: (load 8 from %ir.offset.addr)
MOV64mi32 killed renamable $rax, 1, $noreg, 0, $noreg, 1, debug-location !50 :: (store 8 into %ir.1)
bb.3.if.end:
DBG_VALUE $rbp, 0, !44, !DIExpression(DW_OP_constu, 24, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !45
$esi = XOR32rr undef $esi, undef $esi, implicit-def $eflags, implicit-def $rsi
$rdi = MOV64rm $rbp, 1, $noreg, -24, $noreg :: (load 8 from %stack.2)
$edx = MOV32ri 6, implicit-def $rdx, debug-location !51
CALL64pcrel32 @_ZNSs5eraseEmm, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit killed $rsi, implicit killed $rdx, implicit-def $rax, debug-location !51
renamable $rdx = MOV64rm $rbp, 1, $noreg, -16, $noreg, debug-location !52 :: (load 8 from %ir.limit.addr)
MOV64mi32 killed renamable $rdx, 1, $noreg, 0, $noreg, 2, debug-location !52 :: (store 8 into %ir.2)
MOV64mr $rbp, 1, $noreg, -32, $noreg, killed $rax :: (store 8 into %stack.3)
$rsp = frame-destroy ADD64ri8 $rsp, 32, implicit-def dead $eflags, debug-location !53
$rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !53
CFI_INSTRUCTION def_cfa $rsp, 8, debug-location !53
RETQ debug-location !53
...
|