stack-object-debug-info.mir
2.46 KB
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
# RUN: llc -march=x86-64 -run-pass none -o - %s | FileCheck %s
# This test ensures that the MIR parser parses the stack object's debug info
# correctly.
--- |
declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
define void @foo() #1 {
entry:
%x.i = alloca i8, align 1
%y.i = alloca [256 x i8], align 16
%0 = bitcast [256 x i8]* %y.i to i8*
br label %for.body
for.body:
%1 = bitcast [256 x i8]* %y.i to i8*
call void @llvm.lifetime.end(i64 -1, i8* %1) #3
call void @llvm.lifetime.start(i64 -1, i8* %0) #3
call void @llvm.dbg.declare(metadata i8* %0, metadata !4, metadata !DIExpression()) #3, !dbg !7
br label %for.body
}
declare void @llvm.lifetime.start(i64, i8* nocapture) #2
declare void @llvm.lifetime.end(i64, i8* nocapture) #2
attributes #0 = { nounwind readnone }
attributes #1 = { nounwind ssp uwtable }
attributes #2 = { nounwind argmemonly }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3}
!0 = distinct !DICompileUnit(language: DW_LANG_C89, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2)
!1 = !DIFile(filename: "t.c", directory: "")
!2 = !{}
!3 = !{i32 1, !"Debug Info Version", i32 3}
!4 = !DILocalVariable(name: "x", scope: !5, file: !1, line: 16, type: !8)
!5 = distinct !DISubprogram(scope: null, isLocal: false, isDefinition: true, isOptimized: false, unit: !0)
!6 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
!7 = !DILocation(line: 0, scope: !5)
!8 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 2048, align: 8, elements: !9)
!9 = !{!10}
!10 = !DISubrange(count: 256)
...
---
name: foo
tracksRegLiveness: true
frameInfo:
maxAlignment: 16
# CHECK-LABEL: foo
# CHECK: stack:
# CHECK: - { id: 0, name: y.i, type: default, offset: 0, size: 256, alignment: 16,
# CHECK-NEXT: callee-saved-register: '', callee-saved-restored: true,
# CHECK-NEXT: debug-info-variable: '!4', debug-info-expression: '!DIExpression()',
# CHECK-NEXT: debug-info-location: '!10' }
stack:
- { id: 0, name: y.i, offset: 0, size: 256, alignment: 16,
debug-info-variable: '!4', debug-info-expression: '!DIExpression()',
debug-info-location: '!7' }
body: |
bb.0.entry:
successors: %bb.1.for.body
bb.1.for.body:
successors: %bb.1.for.body
DBG_VALUE %stack.0.y.i, 0, !4, !DIExpression(), debug-location !7
JMP_1 %bb.1.for.body
...