1; RUN: llc %s -filetype=obj -O0 -mtriple=i386-unknown-linux-gnu -dwarf-version=4 -o %t
2; RUN: llvm-dwarfdump %t | FileCheck %s
3
4; From the code:
5
6; debug-loc-offset1.cc
7; int bar (int b) {
8;   return b+4;
9; }
10
11; debug-loc-offset2.cc
12; struct A {
13;   int var;
14;   virtual char foo();
15; };
16
17; void baz(struct A a) {
18;   int z = 2;
19;   if (a.var > 2)
20;     z++;
21;   if (a.foo() == 'a')
22;     z++;
23; }
24
25; Compiled separately for i386-pc-linux-gnu and linked together.
26; This ensures that we have multiple compile units so that we can verify that
27; debug_loc entries are relative to the low_pc of the CU. The loc entry for
28; the byval argument in foo.cpp is in the second CU and so should have
29; an offset relative to that CU rather than from the beginning of the text
30; section.
31
32; Checking that we have two compile units with two sets of high/lo_pc.
33; CHECK: .debug_info contents
34; CHECK: DW_TAG_compile_unit
35; CHECK: DW_AT_low_pc
36; CHECK: DW_AT_high_pc
37
38; CHECK: DW_TAG_compile_unit
39; CHECK: DW_AT_low_pc
40; CHECK: DW_AT_high_pc
41
42; CHECK: DW_TAG_subprogram
43; CHECK-NOT: DW_TAG
44; CHECK: DW_AT_linkage_name [DW_FORM_strp]{{.*}}"_Z3baz1A"
45; CHECK-NOT: {{DW_TAG|NULL}}
46; CHECK: DW_TAG_formal_parameter
47; CHECK-NOT: DW_TAG
48; CHECK: DW_AT_location [DW_FORM_sec_offset]   (0x00000000)
49; CHECK-NOT: DW_TAG
50; CHECK: DW_AT_name [DW_FORM_strp]{{.*}}"a"
51
52; CHECK: DW_TAG_variable
53; CHECK: DW_AT_location [DW_FORM_exprloc]
54; CHECK-NOT: DW_AT_location
55
56; CHECK: .debug_loc contents:
57; CHECK: 0x00000000: Beginning address offset: 0x0000000000000000
58; CHECK:                Ending address offset: 0x0000000000000017
59
60%struct.A = type { i32 (...)**, i32 }
61
62; Function Attrs: nounwind
63define i32 @_Z3bari(i32 %b) #0 {
64entry:
65  %b.addr = alloca i32, align 4
66  store i32 %b, i32* %b.addr, align 4
67  call void @llvm.dbg.declare(metadata i32* %b.addr, metadata !21, metadata !MDExpression()), !dbg !22
68  %0 = load i32, i32* %b.addr, align 4, !dbg !23
69  %add = add nsw i32 %0, 4, !dbg !23
70  ret i32 %add, !dbg !23
71}
72
73; Function Attrs: nounwind readnone
74declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
75
76define void @_Z3baz1A(%struct.A* %a) #2 {
77entry:
78  %z = alloca i32, align 4
79  call void @llvm.dbg.declare(metadata %struct.A* %a, metadata !24, metadata !MDExpression(DW_OP_deref)), !dbg !25
80  call void @llvm.dbg.declare(metadata i32* %z, metadata !26, metadata !MDExpression()), !dbg !27
81  store i32 2, i32* %z, align 4, !dbg !27
82  %var = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 1, !dbg !28
83  %0 = load i32, i32* %var, align 4, !dbg !28
84  %cmp = icmp sgt i32 %0, 2, !dbg !28
85  br i1 %cmp, label %if.then, label %if.end, !dbg !28
86
87if.then:                                          ; preds = %entry
88  %1 = load i32, i32* %z, align 4, !dbg !30
89  %inc = add nsw i32 %1, 1, !dbg !30
90  store i32 %inc, i32* %z, align 4, !dbg !30
91  br label %if.end, !dbg !30
92
93if.end:                                           ; preds = %if.then, %entry
94  %call = call signext i8 @_ZN1A3fooEv(%struct.A* %a), !dbg !31
95  %conv = sext i8 %call to i32, !dbg !31
96  %cmp1 = icmp eq i32 %conv, 97, !dbg !31
97  br i1 %cmp1, label %if.then2, label %if.end4, !dbg !31
98
99if.then2:                                         ; preds = %if.end
100  %2 = load i32, i32* %z, align 4, !dbg !33
101  %inc3 = add nsw i32 %2, 1, !dbg !33
102  store i32 %inc3, i32* %z, align 4, !dbg !33
103  br label %if.end4, !dbg !33
104
105if.end4:                                          ; preds = %if.then2, %if.end
106  ret void, !dbg !34
107}
108
109declare signext i8 @_ZN1A3fooEv(%struct.A*) #2
110
111attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
112attributes #1 = { nounwind readnone }
113attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
114
115!llvm.dbg.cu = !{!0, !9}
116!llvm.module.flags = !{!18, !19}
117!llvm.ident = !{!20, !20}
118
119!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (210479)", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
120!1 = !MDFile(filename: "debug-loc-offset1.cc", directory: "/llvm_cmake_gcc")
121!2 = !{}
122!3 = !{!4}
123!4 = !MDSubprogram(name: "bar", linkageName: "_Z3bari", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, function: i32 (i32)* @_Z3bari, variables: !2)
124!5 = !MDFile(filename: "debug-loc-offset1.cc", directory: "/llvm_cmake_gcc")
125!6 = !MDSubroutineType(types: !7)
126!7 = !{!8, !8}
127!8 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
128!9 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (210479)", isOptimized: false, emissionKind: 1, file: !10, enums: !2, retainedTypes: !11, subprograms: !13, globals: !2, imports: !2)
129!10 = !MDFile(filename: "debug-loc-offset2.cc", directory: "/llvm_cmake_gcc")
130!11 = !{!12}
131!12 = !MDCompositeType(tag: DW_TAG_structure_type, name: "A", line: 1, flags: DIFlagFwdDecl, file: !10, identifier: "_ZTS1A")
132!13 = !{!14}
133!14 = !MDSubprogram(name: "baz", linkageName: "_Z3baz1A", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 6, file: !10, scope: !15, type: !16, function: void (%struct.A*)* @_Z3baz1A, variables: !2)
134!15 = !MDFile(filename: "debug-loc-offset2.cc", directory: "/llvm_cmake_gcc")
135!16 = !MDSubroutineType(types: !17)
136!17 = !{null, !12}
137!18 = !{i32 2, !"Dwarf Version", i32 4}
138!19 = !{i32 2, !"Debug Info Version", i32 3}
139!20 = !{!"clang version 3.5.0 (210479)"}
140!21 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "b", line: 1, arg: 1, scope: !4, file: !5, type: !8)
141!22 = !MDLocation(line: 1, scope: !4)
142!23 = !MDLocation(line: 2, scope: !4)
143!24 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "a", line: 6, arg: 1, scope: !14, file: !15, type: !"_ZTS1A")
144!25 = !MDLocation(line: 6, scope: !14)
145!26 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "z", line: 7, scope: !14, file: !15, type: !8)
146!27 = !MDLocation(line: 7, scope: !14)
147!28 = !MDLocation(line: 8, scope: !29)
148!29 = distinct !MDLexicalBlock(line: 8, column: 0, file: !10, scope: !14)
149!30 = !MDLocation(line: 9, scope: !29)
150!31 = !MDLocation(line: 10, scope: !32)
151!32 = distinct !MDLexicalBlock(line: 10, column: 0, file: !10, scope: !14)
152!33 = !MDLocation(line: 11, scope: !32)
153!34 = !MDLocation(line: 12, scope: !14)
154