1# RUN: llc -march=x86-64 -run-pass none -o - %s | FileCheck %s
2# This test ensures that the MIR parser parses the stack object's debug info
3# correctly.
4--- |
5  declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
6
7  define void @foo() #1 {
8  entry:
9    %x.i = alloca i8, align 1
10    %y.i = alloca [256 x i8], align 16
11    %0 = bitcast [256 x i8]* %y.i to i8*
12    br label %for.body
13
14  for.body:
15    %1 = bitcast [256 x i8]* %y.i to i8*
16    call void @llvm.lifetime.end(i64 -1, i8* %1) #3
17    call void @llvm.lifetime.start(i64 -1, i8* %0) #3
18    call void @llvm.dbg.declare(metadata i8* %0, metadata !4, metadata !DIExpression()) #3, !dbg !7
19    br label %for.body
20  }
21
22  declare void @llvm.lifetime.start(i64, i8* nocapture) #2
23
24  declare void @llvm.lifetime.end(i64, i8* nocapture) #2
25
26  attributes #0 = { nounwind readnone }
27  attributes #1 = { nounwind ssp uwtable }
28  attributes #2 = { nounwind argmemonly }
29  attributes #3 = { nounwind }
30
31  !llvm.dbg.cu = !{!0}
32  !llvm.module.flags = !{!3}
33
34  !0 = distinct !DICompileUnit(language: DW_LANG_C89, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2)
35  !1 = !DIFile(filename: "t.c", directory: "")
36  !2 = !{}
37  !3 = !{i32 1, !"Debug Info Version", i32 3}
38  !4 = !DILocalVariable(name: "x", scope: !5, file: !1, line: 16, type: !8)
39  !5 = distinct !DISubprogram(scope: null, isLocal: false, isDefinition: true, isOptimized: false, unit: !0)
40  !6 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
41  !7 = !DILocation(line: 0, scope: !5)
42  !8 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 2048, align: 8, elements: !9)
43  !9 = !{!10}
44  !10 = !DISubrange(count: 256)
45...
46---
47name:            foo
48tracksRegLiveness: true
49frameInfo:
50  maxAlignment:    16
51# CHECK-LABEL: foo
52# CHECK: stack:
53# CHECK:  - { id: 0, name: y.i, type: default, offset: 0, size: 256, alignment: 16,
54# CHECK-NEXT: callee-saved-register: '', callee-saved-restored: true,
55# CHECK-NEXT: debug-info-variable: '!4', debug-info-expression: '!DIExpression()',
56# CHECK-NEXT: debug-info-location: '!10' }
57stack:
58  - { id: 0, name: y.i, offset: 0, size: 256, alignment: 16,
59      debug-info-variable: '!4', debug-info-expression: '!DIExpression()',
60      debug-info-location: '!7' }
61body: |
62  bb.0.entry:
63    successors: %bb.1.for.body
64  bb.1.for.body:
65    successors: %bb.1.for.body
66
67    DBG_VALUE %stack.0.y.i, 0, !4, !DIExpression(), debug-location !7
68    JMP_1 %bb.1.for.body
69...
70