1; RUN: llc < %s -filetype=obj | llvm-dwarfdump -v - --debug-info | FileCheck %s
2;
3; IR module created as follows:
4;   clang -emit-llvm -S db-abs-1.cpp -o db-abs-1.ll -g
5;   clang -emit-llvm -S db-abs-2.cpp -o db-abs-2.ll -gmlt
6;   llvm-link db-abs-1.ll db-abs-2.ll -S -o db-abs-3.ll
7; --- db-abs-1.cpp ---
8; void f1();
9; inline __attribute__((always_inline)) void f2(int) {
10;   f1();
11; }
12; void f3() {
13;   f2(0);
14; }
15; --- db-abs-2.cpp ---
16; void f() {
17; }
18; ---
19; The point is that f3() is compiled -g and we get an abstract variable for the
20; unnamed parameter to f2(); then f() is compiled -gmlt and it's okay to have
21; the abstract variable still there.
22; PR31437.
23;
24; (The 'always_inline' attribute forces f2() to be inlined even at -O0, the
25; 'inline' keyword means the non-inlined definition of f2() can be omitted from
26; the IR.  These are just tactics to simplify the generated test case.)
27;
28; Verify we see the formal parameter in the first compile-unit, and nothing in
29; the second compile-unit.
30;
31; CHECK:      DW_TAG_compile_unit
32; CHECK-NOT:  DW_TAG
33; CHECK:      DW_AT_name {{.*}} "db-abs-1.cpp"
34; CHECK-NOT:  NULL
35; CHECK:      DW_TAG_subprogram
36; CHECK-NEXT: DW_AT_linkage_name {{.*}} "_Z2f2i"
37; CHECK-NOT:  {{DW_TAG|NULL}}
38; CHECK:      DW_TAG_formal_parameter
39; CHECK-NOT:  DW_AT_name
40; CHECK:      {{DW_TAG|NULL}}
41; CHECK:      DW_TAG_inlined_subroutine
42; CHECK-NEXT: DW_AT_abstract_origin {{.*}} "_Z2f2i"
43
44; CHECK:      DW_TAG_compile_unit
45; CHECK-NOT:  DW_TAG
46
47; ModuleID = 'llvm-link'
48source_filename = "llvm-link"
49target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
50target triple = "x86_64-unknown-linux-gnu"
51
52; Function Attrs: noinline uwtable
53define void @_Z2f3v() #0 !dbg !8 {
54entry:
55  %.addr.i = alloca i32, align 4
56  call void @llvm.dbg.declare(metadata i32* %.addr.i, metadata !11, metadata !16), !dbg !17
57  store i32 0, i32* %.addr.i, align 4
58  call void @_Z2f1v(), !dbg !19
59  ret void, !dbg !20
60}
61
62; Function Attrs: nounwind readnone
63declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
64
65declare void @_Z2f1v() #2
66
67; Function Attrs: noinline nounwind uwtable
68define void @_Z1fv() #3 !dbg !21 {
69entry:
70  ret void, !dbg !23
71}
72
73attributes #0 = { noinline uwtable }
74attributes #1 = { nounwind readnone }
75attributes #2 = { nounwind }
76attributes #3 = { noinline nounwind uwtable }
77
78!llvm.dbg.cu = !{!0, !3}
79!llvm.ident = !{!5, !5}
80!llvm.module.flags = !{!6, !7}
81
82!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 (trunk 293745)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
83!1 = !DIFile(filename: "db-abs-1.cpp", directory: "/home/probinson/projects/scratch/pr31437")
84!2 = !{}
85!3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "clang version 5.0.0 (trunk 293745)", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
86!4 = !DIFile(filename: "db-abs-2.cpp", directory: "/home/probinson/projects/scratch/pr31437")
87!5 = !{!"clang version 5.0.0 (trunk 293745)"}
88!6 = !{i32 2, !"Dwarf Version", i32 4}
89!7 = !{i32 2, !"Debug Info Version", i32 3}
90!8 = distinct !DISubprogram(name: "f3", linkageName: "_Z2f3v", scope: !1, file: !1, line: 5, type: !9, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
91!9 = !DISubroutineType(types: !10)
92!10 = !{null}
93!11 = !DILocalVariable(arg: 1, scope: !12, file: !1, line: 2, type: !15)
94!12 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2i", scope: !1, file: !1, line: 2, type: !13, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
95!13 = !DISubroutineType(types: !14)
96!14 = !{null, !15}
97!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
98!16 = !DIExpression()
99!17 = !DILocation(line: 2, column: 50, scope: !12, inlinedAt: !18)
100!18 = distinct !DILocation(line: 6, column: 3, scope: !8)
101!19 = !DILocation(line: 3, column: 3, scope: !12, inlinedAt: !18)
102!20 = !DILocation(line: 7, column: 1, scope: !8)
103!21 = distinct !DISubprogram(name: "f", scope: !4, file: !4, line: 1, type: !22, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !3, retainedNodes: !2)
104!22 = !DISubroutineType(types: !2)
105!23 = !DILocation(line: 2, column: 1, scope: !21)
106