1# RUN: llc -start-after=livedebugvalues --filetype=obj %s -o - \
2# RUN:     | llvm-dwarfdump -v - | FileCheck %s
3#
4# Generated at -O2, stopped after livedebugvalues, with some metadata removed
5# by hand:
6# int global;
7# void ext();
8# void fun(int p) {
9#   {
10#     int local = p;
11#     global = local;
12#   }
13#   ext();
14# }
15#
16# The variable 'local' is available for the entirety of its enclosing scope so
17# we expect to see a single location entry.
18#
19# Except for 'local', all DILocalVariable metadata has been removed.
20#
21# CHECK:     DW_TAG_lexical_block [
22# CHECK:       DW_TAG_variable
23# CHECK-NEXT:    DW_AT_location [DW_FORM_exprloc] (DW_OP_reg5 RDI)
24# CHECK-NEXT:    DW_AT_name {{.*}} = "local"
25
26--- |
27  target triple = "x86_64-unknown-linux-gnu"
28  @global = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
29  define dso_local void @fun(i32 %p) local_unnamed_addr !dbg !15 {
30  entry:
31    call void @llvm.dbg.value(metadata i32 %p, metadata !20, metadata !DIExpression()), !dbg !23
32    store i32 %p, i32* @global, align 4, !dbg !24
33    tail call void (...) @ext(), !dbg !29
34    ret void, !dbg !30
35  }
36
37  declare !dbg !6 dso_local void @ext(...) local_unnamed_addr
38  declare void @llvm.dbg.value(metadata, metadata, metadata)
39
40  !llvm.dbg.cu = !{!2}
41  !llvm.module.flags = !{!11, !12, !13}
42  !llvm.ident = !{!14}
43
44  !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
45  !1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 1, type: !10, isLocal: false, isDefinition: true)
46  !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)
47  !3 = !DIFile(filename: "test.c", directory: "/")
48  !4 = !{}
49  !5 = !{!6}
50  !6 = !DISubprogram(name: "ext", scope: !3, file: !3, line: 2, type: !7, spFlags: DISPFlagOptimized, retainedNodes: !4)
51  !7 = !DISubroutineType(types: !8)
52  !8 = !{null, null}
53  !9 = !{!0}
54  !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
55  !11 = !{i32 7, !"Dwarf Version", i32 4}
56  !12 = !{i32 2, !"Debug Info Version", i32 3}
57  !13 = !{i32 1, !"wchar_size", i32 4}
58  !14 = !{!"clang version 11.0.0"}
59  !15 = distinct !DISubprogram(name: "fun", scope: !3, file: !3, line: 3, type: !16, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !18)
60  !16 = !DISubroutineType(types: !17)
61  !17 = !{null, !10}
62  !18 = !{!20}
63  !20 = !DILocalVariable(name: "local", scope: !21, file: !3, line: 5, type: !10)
64  !21 = distinct !DILexicalBlock(scope: !15, file: !3, line: 4, column: 3)
65  !22 = !DILocation(line: 0, scope: !15)
66  !23 = !DILocation(line: 0, scope: !21)
67  !24 = !DILocation(line: 6, column: 12, scope: !21)
68  !29 = !DILocation(line: 8, column: 3, scope: !15)
69  !30 = !DILocation(line: 9, column: 1, scope: !15)
70
71...
72---
73name:            fun
74body:             |
75  bb.0.entry:
76    liveins: $edi
77
78    DBG_VALUE $edi, $noreg, !20, !DIExpression(), debug-location !23
79    MOV32mr $rip, 1, $noreg, @global, $noreg, killed renamable $edi, debug-location !24 :: (store 4 into @global)
80    dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !29
81    TAILJMPd64 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit killed $al, debug-location !29
82...
83