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
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
|
# RUN: llc -mtriple=x86_64-pc-linux %s -run-pass=branch-folder -o - | FileCheck %s
--- |
; ModuleID = 'case2.c'
source_filename = "case2.c"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@q1 = dso_local local_unnamed_addr global i32 1, align 4, !dbg !0
@q2 = dso_local local_unnamed_addr global i32 4, align 4, !dbg !5
@q3 = dso_local local_unnamed_addr global i32 2, align 4, !dbg !8
@g1 = dso_local local_unnamed_addr global i32 0, align 4, !dbg !10
@g2 = dso_local local_unnamed_addr global i32 0, align 4, !dbg !12
@g3 = dso_local local_unnamed_addr global i32 0, align 4, !dbg !14
; Function Attrs: nounwind uwtable
define dso_local i32 @multiple_inl_multiple_loc() local_unnamed_addr #0 !dbg !23 {
entry:
%0 = load i32, ptr @q1, align 4, !dbg !27, !tbaa !28
call void @llvm.dbg.value(metadata i32 %0, metadata !32, metadata !DIExpression()), !dbg !38
call void @llvm.dbg.value(metadata i32 100, metadata !37, metadata !DIExpression()), !dbg !38
%cmp.i = icmp sgt i32 %0, 3, !dbg !40
br i1 %cmp.i, label %if.then.i, label %if.end.i, !dbg !42
if.then.i: ; preds = %entry
tail call void @abort() #3, !dbg !43
unreachable, !dbg !43
if.end.i: ; preds = %entry
%cmp1.i = icmp slt i32 %0, 1, !dbg !44
br i1 %cmp1.i, label %if.then2.i, label %inl2.exit, !dbg !46
if.then2.i: ; preds = %if.end.i
tail call void @abort() #3, !dbg !47
unreachable, !dbg !47
inl2.exit: ; preds = %if.end.i
%mul.i = mul nuw nsw i32 %0, 152, !dbg !48
%add.i = add nuw nsw i32 %mul.i, 100, !dbg !49
store i32 %add.i, ptr @g1, align 4, !dbg !50, !tbaa !28
%1 = load i32, ptr @q2, align 4, !dbg !51, !tbaa !28
call void @llvm.dbg.value(metadata i32 %1, metadata !32, metadata !DIExpression()), !dbg !52
call void @llvm.dbg.value(metadata i32 200, metadata !37, metadata !DIExpression()), !dbg !52
%cmp.i3 = icmp sgt i32 %1, 3, !dbg !54
br i1 %cmp.i3, label %if.then.i4, label %if.end.i6, !dbg !55
if.then.i4: ; preds = %inl2.exit
tail call void @abort() #3, !dbg !56
unreachable, !dbg !56
if.end.i6: ; preds = %inl2.exit
%cmp1.i5 = icmp slt i32 %1, 1, !dbg !57
br i1 %cmp1.i5, label %if.then2.i7, label %inl2.exit10, !dbg !58
if.then2.i7: ; preds = %if.end.i6
tail call void @abort() #3, !dbg !59
unreachable, !dbg !59
inl2.exit10: ; preds = %if.end.i6
%mul.i8 = mul nuw nsw i32 %1, 152, !dbg !60
%add.i9 = add nuw nsw i32 %mul.i8, 200, !dbg !61
store i32 %add.i9, ptr @g2, align 4, !dbg !62, !tbaa !28
%2 = load i32, ptr @q3, align 4, !dbg !63, !tbaa !28
call void @llvm.dbg.value(metadata i32 %2, metadata !32, metadata !DIExpression()), !dbg !64
call void @llvm.dbg.value(metadata i32 300, metadata !37, metadata !DIExpression()), !dbg !64
%cmp.i11 = icmp sgt i32 %2, 3, !dbg !66
br i1 %cmp.i11, label %if.then.i12, label %if.end.i14, !dbg !67
if.then.i12: ; preds = %inl2.exit10
tail call void @abort() #3, !dbg !68
unreachable, !dbg !68
if.end.i14: ; preds = %inl2.exit10
%cmp1.i13 = icmp slt i32 %2, 1, !dbg !69
br i1 %cmp1.i13, label %if.then2.i15, label %inl2.exit18, !dbg !70
if.then2.i15: ; preds = %if.end.i14
tail call void @abort() #3, !dbg !71
unreachable, !dbg !71
inl2.exit18: ; preds = %if.end.i14
%mul.i16 = mul nuw nsw i32 %2, 152, !dbg !72
%add.i17 = add nuw nsw i32 %mul.i16, 300, !dbg !73
store i32 %add.i17, ptr @q3, align 4, !dbg !74, !tbaa !28
ret i32 0, !dbg !75
}
; Function Attrs: noreturn nounwind
declare !dbg !76 void @abort() local_unnamed_addr #1
; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare void @llvm.dbg.value(metadata, metadata, metadata) #2
attributes #0 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { noreturn nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { noreturn nounwind }
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!16, !17, !18, !19, !20, !21}
!llvm.ident = !{!22}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "q1", scope: !2, file: !3, line: 12, type: !7, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C11, file: !3, producer: "clang version 16.0.0.prerel", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !4, splitDebugInlining: false, nameTableKind: None)
!3 = !DIFile(filename: "case2.c", directory: "/", checksumkind: CSK_MD5, checksum: "5093c50294e57eaa7f9ed00bfd62075c")
!4 = !{!0, !5, !8, !10, !12, !14}
!5 = !DIGlobalVariableExpression(var: !6, expr: !DIExpression())
!6 = distinct !DIGlobalVariable(name: "q2", scope: !2, file: !3, line: 12, type: !7, isLocal: false, isDefinition: true)
!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!8 = !DIGlobalVariableExpression(var: !9, expr: !DIExpression())
!9 = distinct !DIGlobalVariable(name: "q3", scope: !2, file: !3, line: 12, type: !7, isLocal: false, isDefinition: true)
!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression())
!11 = distinct !DIGlobalVariable(name: "g1", scope: !2, file: !3, line: 13, type: !7, isLocal: false, isDefinition: true)
!12 = !DIGlobalVariableExpression(var: !13, expr: !DIExpression())
!13 = distinct !DIGlobalVariable(name: "g2", scope: !2, file: !3, line: 13, type: !7, isLocal: false, isDefinition: true)
!14 = !DIGlobalVariableExpression(var: !15, expr: !DIExpression())
!15 = distinct !DIGlobalVariable(name: "g3", scope: !2, file: !3, line: 13, type: !7, isLocal: false, isDefinition: true)
!16 = !{i32 7, !"Dwarf Version", i32 5}
!17 = !{i32 2, !"Debug Info Version", i32 3}
!18 = !{i32 1, !"wchar_size", i32 4}
!19 = !{i32 8, !"PIC Level", i32 2}
!20 = !{i32 7, !"PIE Level", i32 2}
!21 = !{i32 7, !"uwtable", i32 2}
!22 = !{!"clang version 16.0.0.prerel"}
!23 = distinct !DISubprogram(name: "multiple_inl_multiple_loc", scope: !3, file: !3, line: 15, type: !24, scopeLine: 16, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !26)
!24 = !DISubroutineType(types: !25)
!25 = !{!7}
!26 = !{}
!27 = !DILocation(line: 17, column: 13, scope: !23)
!28 = !{!29, !29, i64 0}
!29 = !{!"int", !30, i64 0}
!30 = !{!"omnipotent char", !31, i64 0}
!31 = !{!"Simple C/C++ TBAA"}
!32 = !DILocalVariable(name: "q", arg: 1, scope: !33, file: !3, line: 3, type: !7)
!33 = distinct !DISubprogram(name: "inl2", scope: !3, file: !3, line: 3, type: !34, scopeLine: 4, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !36)
!34 = !DISubroutineType(types: !35)
!35 = !{!7, !7, !7}
!36 = !{!32, !37}
!37 = !DILocalVariable(name: "n", arg: 2, scope: !33, file: !3, line: 3, type: !7)
!38 = !DILocation(line: 0, scope: !33, inlinedAt: !39)
!39 = distinct !DILocation(line: 17, column: 8, scope: !23)
!40 = !DILocation(line: 5, column: 9, scope: !41, inlinedAt: !39)
!41 = distinct !DILexicalBlock(scope: !33, file: !3, line: 5, column: 7)
!42 = !DILocation(line: 5, column: 7, scope: !33, inlinedAt: !39)
!43 = !DILocation(line: 6, column: 5, scope: !41, inlinedAt: !39)
!44 = !DILocation(line: 7, column: 9, scope: !45, inlinedAt: !39)
!45 = distinct !DILexicalBlock(scope: !33, file: !3, line: 7, column: 7)
!46 = !DILocation(line: 7, column: 7, scope: !33, inlinedAt: !39)
!47 = !DILocation(line: 8, column: 5, scope: !45, inlinedAt: !39)
!48 = !DILocation(line: 9, column: 12, scope: !33, inlinedAt: !39)
!49 = !DILocation(line: 9, column: 18, scope: !33, inlinedAt: !39)
!50 = !DILocation(line: 17, column: 6, scope: !23)
!51 = !DILocation(line: 18, column: 13, scope: !23)
!52 = !DILocation(line: 0, scope: !33, inlinedAt: !53)
!53 = distinct !DILocation(line: 18, column: 8, scope: !23)
!54 = !DILocation(line: 5, column: 9, scope: !41, inlinedAt: !53)
!55 = !DILocation(line: 5, column: 7, scope: !33, inlinedAt: !53)
!56 = !DILocation(line: 6, column: 5, scope: !41, inlinedAt: !53)
!57 = !DILocation(line: 7, column: 9, scope: !45, inlinedAt: !53)
!58 = !DILocation(line: 7, column: 7, scope: !33, inlinedAt: !53)
!59 = !DILocation(line: 8, column: 5, scope: !45, inlinedAt: !53)
!60 = !DILocation(line: 9, column: 12, scope: !33, inlinedAt: !53)
!61 = !DILocation(line: 9, column: 18, scope: !33, inlinedAt: !53)
!62 = !DILocation(line: 18, column: 6, scope: !23)
!63 = !DILocation(line: 19, column: 13, scope: !23)
!64 = !DILocation(line: 0, scope: !33, inlinedAt: !65)
!65 = distinct !DILocation(line: 19, column: 8, scope: !23)
!66 = !DILocation(line: 5, column: 9, scope: !41, inlinedAt: !65)
!67 = !DILocation(line: 5, column: 7, scope: !33, inlinedAt: !65)
!68 = !DILocation(line: 6, column: 5, scope: !41, inlinedAt: !65)
!69 = !DILocation(line: 7, column: 9, scope: !45, inlinedAt: !65)
!70 = !DILocation(line: 7, column: 7, scope: !33, inlinedAt: !65)
!71 = !DILocation(line: 8, column: 5, scope: !45, inlinedAt: !65)
!72 = !DILocation(line: 9, column: 12, scope: !33, inlinedAt: !65)
!73 = !DILocation(line: 9, column: 18, scope: !33, inlinedAt: !65)
!74 = !DILocation(line: 19, column: 6, scope: !23)
!75 = !DILocation(line: 20, column: 3, scope: !23)
!76 = !DISubprogram(name: "abort", scope: !77, file: !77, line: 514, type: !78, flags: DIFlagPrototyped | DIFlagNoReturn, spFlags: DISPFlagOptimized, retainedNodes: !26)
!77 = !DIFile(filename: "/usr/include/stdlib.h", directory: "", checksumkind: CSK_MD5, checksum: "f7a1412d75d9e3df251dfc21b02d59ef")
!78 = !DISubroutineType(types: !79)
!79 = !{null}
...
---
name: multiple_inl_multiple_loc
alignment: 16
tracksRegLiveness: true
tracksDebugUserValues: true
frameInfo:
stackSize: 8
offsetAdjustment: -8
maxAlignment: 1
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0.entry:
successors: %bb.1(0x00000800), %bb.2(0x7ffff800)
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
frame-setup CFI_INSTRUCTION def_cfa_offset 16
renamable $eax = MOV32rm $rip, 1, $noreg, @q1, $noreg, debug-instr-number 1, debug-location !27 :: (dereferenceable load (s32) from @q1, !tbaa !28)
DBG_INSTR_REF !32, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !38
DBG_VALUE 100, $noreg, !37, !DIExpression(), debug-location !38
CMP32ri8 renamable $eax, 4, implicit-def $eflags, debug-location !40
JCC_1 %bb.2, 12, implicit killed $eflags, debug-location !42
JMP_1 %bb.1, debug-location !42
bb.1.if.then.i:
successors:
CALL64pcrel32 target-flags(x86-plt) @abort, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, debug-location !43
bb.2.if.end.i:
successors: %bb.3(0x00000800), %bb.4(0x7ffff800)
liveins: $eax
TEST32rr renamable $eax, renamable $eax, implicit-def $eflags, debug-location !44
JCC_1 %bb.4, 15, implicit killed $eflags, debug-location !46
JMP_1 %bb.3, debug-location !46
bb.3.if.then2.i:
successors:
CALL64pcrel32 target-flags(x86-plt) @abort, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, debug-location !47
bb.4.inl2.exit:
successors: %bb.5(0x00000800), %bb.6(0x7ffff800)
liveins: $eax
renamable $eax = nuw nsw IMUL32rri killed renamable $eax, 152, implicit-def dead $eflags, debug-location !48
renamable $eax = nuw nsw ADD32ri8 killed renamable $eax, 100, implicit-def dead $eflags, debug-location !49
MOV32mr $rip, 1, $noreg, @g1, $noreg, killed renamable $eax, debug-location !50 :: (store (s32) into @g1, !tbaa !28)
renamable $eax = MOV32rm $rip, 1, $noreg, @q2, $noreg, debug-instr-number 2, debug-location !51 :: (dereferenceable load (s32) from @q2, !tbaa !28)
DBG_INSTR_REF !32, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(2, 0), debug-location !52
DBG_VALUE 200, $noreg, !37, !DIExpression(), debug-location !52
CMP32ri8 renamable $eax, 4, implicit-def $eflags, debug-location !54
JCC_1 %bb.6, 12, implicit killed $eflags, debug-location !55
JMP_1 %bb.5, debug-location !55
bb.5.if.then.i4:
successors:
CALL64pcrel32 target-flags(x86-plt) @abort, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, debug-location !56
bb.6.if.end.i6:
successors: %bb.7(0x00000800), %bb.8(0x7ffff800)
liveins: $eax
TEST32rr renamable $eax, renamable $eax, implicit-def $eflags, debug-location !57
JCC_1 %bb.8, 15, implicit killed $eflags, debug-location !58
JMP_1 %bb.7, debug-location !58
bb.7.if.then2.i7:
successors:
CALL64pcrel32 target-flags(x86-plt) @abort, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, debug-location !59
bb.8.inl2.exit10:
successors: %bb.9(0x00000800), %bb.10(0x7ffff800)
liveins: $eax
renamable $eax = nuw nsw IMUL32rri killed renamable $eax, 152, implicit-def dead $eflags, debug-location !60
renamable $eax = nuw nsw ADD32ri killed renamable $eax, 200, implicit-def dead $eflags, debug-location !61
MOV32mr $rip, 1, $noreg, @g2, $noreg, killed renamable $eax, debug-location !62 :: (store (s32) into @g2, !tbaa !28)
renamable $eax = MOV32rm $rip, 1, $noreg, @q3, $noreg, debug-instr-number 3, debug-location !63 :: (dereferenceable load (s32) from @q3, !tbaa !28)
DBG_INSTR_REF !32, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(3, 0), debug-location !64
DBG_VALUE 300, $noreg, !37, !DIExpression(), debug-location !64
CMP32ri8 renamable $eax, 4, implicit-def $eflags, debug-location !66
JCC_1 %bb.10, 12, implicit killed $eflags, debug-location !67
JMP_1 %bb.9, debug-location !67
bb.9.if.then.i12:
successors:
CALL64pcrel32 target-flags(x86-plt) @abort, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, debug-location !68
bb.10.if.end.i14:
successors: %bb.11(0x00000800), %bb.12(0x7ffff800)
liveins: $eax
TEST32rr renamable $eax, renamable $eax, implicit-def $eflags, debug-location !69
JCC_1 %bb.12, 15, implicit killed $eflags, debug-location !70
JMP_1 %bb.11, debug-location !70
bb.11.if.then2.i15:
successors:
CALL64pcrel32 target-flags(x86-plt) @abort, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, debug-location !71
bb.12.inl2.exit18:
liveins: $eax
renamable $eax = nuw nsw IMUL32rri killed renamable $eax, 152, implicit-def dead $eflags, debug-location !72
renamable $eax = nuw nsw ADD32ri killed renamable $eax, 300, implicit-def dead $eflags, debug-location !73
MOV32mr $rip, 1, $noreg, @q3, $noreg, killed renamable $eax, debug-location !74 :: (store (s32) into @q3, !tbaa !28)
$eax = MOV32r0 implicit-def dead $eflags, debug-location !75
$rcx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !75
frame-destroy CFI_INSTRUCTION def_cfa_offset 8, debug-location !75
RET 0, $eax, debug-location !75
...
# In this case we have a abort call block folded from two locations in
# three inlined instances of inl1():
#
# 1 | #include <stdlib.h>
# 2 |
# 3 | static inline int inl2(int q, int n)
# 4 | {
# 5 | if (q > 3)
# 6 | abort();
# 7 | if (q < 1)
# 8 | abort();
# 9 | return q * 152 + n;
# 10 | }
# 11 |
# 12 | int q1 = 1, q2 = 4, q3 = 2;
# 13 | int g1, g2, g3;
# 14 |
# 15 | int multiple_inl_multiple_loc()
# 16 | {
# 17 | g1 = inl2(q1, 100);
# 18 | g2 = inl2(q2, 200);
# 19 | q3 = inl2(q3, 300);
# 20 | return 0;
# 21 | }
#
# We should produce a merged location describing that the abort call is located
# at line 0 in inl2() inlined at line 0 in multiple_inl_multiple_loc().
# CHECK-DAG: [[INLINER:![0-9]+]] = distinct !DISubprogram(name: "multiple_inl_multiple_loc"
# CHECK-DAG: [[INLINEE:![0-9]+]] = distinct !DISubprogram(name: "inl2"
# CHECK-NOT: CALL64pcrel32
# CHECK: CALL64pcrel32 target-flags(x86-plt) @abort, {{.*}} debug-location !DILocation(line: 0, scope: [[INLINEE]], inlinedAt: !DILocation(line: 0, scope: [[INLINER]]))
# CHECK-NOT: CALL64pcrel32
|
