1; RUN: llc -filetype=obj -use-unknown-locations=Enable -mtriple=x86_64-unknown-linux %s -o %t
2; RUN: llvm-dwarfdump -debug-line %t | FileCheck %s
3
4define void @_Z3bazv() !dbg !6 {
5  call void @_Z3foov(), !dbg !9
6  call void @_Z3foov() ; no !dbg, so will be marked as line 0
7  ret void, !dbg !11
8}
9
10declare void @_Z3foov()
11
12!llvm.dbg.cu = !{!0}
13!llvm.module.flags = !{!3, !4}
14!llvm.ident = !{!5}
15
16!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.9.0 (trunk 267219)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
17!1 = !DIFile(filename: "test.cc", directory: ".")
18!2 = !{}
19!3 = !{i32 2, !"Dwarf Version", i32 4}
20!4 = !{i32 2, !"Debug Info Version", i32 3}
21!5 = !{!"clang version 3.9.0 (trunk 267219)"}
22!6 = distinct !DISubprogram(name: "baz", linkageName: "_Z3bazv", scope: !1, file: !1, line: 3, type: !7, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
23!7 = !DISubroutineType(types: !8)
24!8 = !{null}
25!9 = !DILocation(line: 4, column: 3, scope: !10)
26!10 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 1)
27!11 = !DILocation(line: 6, column: 1, scope: !6)
28
29; Look at the lengths. We can't verify the line-number-program size
30; directly, but the difference in the two lengths should not change
31; unexpectedly.
32; CHECK:    total_length: 0x00000044
33; CHECK: prologue_length: 0x0000001f
34;
35; Verify that we see a line entry with a discriminator, and the next entry
36; has line 0 and no discriminator.
37;             line column file ISA discriminator
38; CHECK:      4    3      1    0   1
39; CHECK-NEXT: 0    3      1    0   0
40