• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1; RUN: llc -filetype=obj -o - < %s | llvm-dwarfdump - --debug-loc | FileCheck %s
2;
3; Created using clang -g -O3 from:
4; struct S0 {
5;  short f0;
6;  int f3;
7; } a;
8; void fn1(short p1) {
9;  struct S0 b, c = {3};
10;  b.f3 = p1;
11;  a = b = c;
12; }
13;
14; int main() { return 0; }
15;
16; This is similar to the bug in test/DebugInfo/ARM/PR26163.ll, except that there is an
17; extra non-overlapping range first. Thus, we make sure that the backend actually looks
18; at all expressions when determining whether to merge ranges, not just the first one.
19; AS in 26163, we expect two ranges (as opposed to one), the first one being zero sized
20;
21;
22; CHECK: [0x0000000000000004, 0x0000000000000004): DW_OP_constu 0x3, DW_OP_piece 0x4, DW_OP_reg5 RDI, DW_OP_piece 0x2
23; CHECK: [0x0000000000000004, 0x0000000000000014): DW_OP_constu 0x3, DW_OP_piece 0x4, DW_OP_constu 0x0, DW_OP_piece 0x4
24
25source_filename = "test/DebugInfo/X86/PR26148.ll"
26target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
27target triple = "x86_64-apple-macosx10.11.0"
28
29%struct.S0 = type { i16, i32 }
30
31@a = common global %struct.S0 zeroinitializer, align 4, !dbg !0
32
33; Function Attrs: nounwind readnone
34declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
35
36; Function Attrs: nounwind readnone
37declare void @llvm.dbg.value(metadata, metadata, metadata) #0
38; The attributes are here to force the zero-sized range not to be at the start of
39; the function, which has special interpretation in DWARF. The fact that this happens
40; at all is probably an LLVM bug.
41
42define void @fn1(i16 signext %p1) #1 !dbg !16 {
43entry:
44  tail call void @llvm.dbg.value(metadata i16 %p1, metadata !20, metadata !23), !dbg !24
45  tail call void @llvm.dbg.declare(metadata %struct.S0* undef, metadata !21, metadata !23), !dbg !25
46  tail call void @llvm.dbg.declare(metadata %struct.S0* undef, metadata !22, metadata !23), !dbg !26
47  tail call void @llvm.dbg.value(metadata i32 3, metadata !22, metadata !27), !dbg !26
48  tail call void @llvm.dbg.value(metadata i32 0, metadata !22, metadata !28), !dbg !26
49  tail call void @llvm.dbg.value(metadata i16 %p1, metadata !21, metadata !29), !dbg !25
50  tail call void @llvm.dbg.value(metadata i32 3, metadata !21, metadata !27), !dbg !25
51  tail call void @llvm.dbg.value(metadata i32 0, metadata !21, metadata !28), !dbg !25
52  store i32 3, i32* bitcast (%struct.S0* @a to i32*), align 4, !dbg !30
53  store i32 0, i32* getelementptr inbounds (%struct.S0, %struct.S0* @a, i64 0, i32 1), align 4, !dbg !30
54  ret void, !dbg !31
55}
56
57define i32 @main() !dbg !32 {
58entry:
59  ret i32 0, !dbg !35
60}
61
62attributes #0 = { nounwind readnone }
63attributes #1 = { "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" }
64
65!llvm.dbg.cu = !{!2}
66!llvm.module.flags = !{!12, !13, !14}
67!llvm.ident = !{!15}
68
69!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
70!1 = !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 4, type: !6, isLocal: false, isDefinition: true)
71!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.9.0 (https://github.com/llvm-mirror/clang 8f258397c5afd7a708bd95770c718e81d08fb11a) (https://github.com/llvm-mirror/llvm 18481855bdfa1b4a424f81be8525db002671348d)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
72!3 = !DIFile(filename: "small.c", directory: "/Users/kfischer/Projects/clangbug")
73!4 = !{}
74!5 = !{!0}
75!6 = !DICompositeType(tag: DW_TAG_structure_type, name: "S0", file: !3, line: 1, size: 64, align: 32, elements: !7)
76!7 = !{!8, !10}
77!8 = !DIDerivedType(tag: DW_TAG_member, name: "f0", scope: !6, file: !3, line: 2, baseType: !9, size: 16, align: 16)
78!9 = !DIBasicType(name: "short", size: 16, align: 16, encoding: DW_ATE_signed)
79!10 = !DIDerivedType(tag: DW_TAG_member, name: "f3", scope: !6, file: !3, line: 3, baseType: !11, size: 32, align: 32, offset: 32)
80!11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
81!12 = !{i32 2, !"Dwarf Version", i32 2}
82!13 = !{i32 2, !"Debug Info Version", i32 3}
83!14 = !{i32 1, !"PIC Level", i32 2}
84!15 = !{!"clang version 3.9.0 (https://github.com/llvm-mirror/clang 8f258397c5afd7a708bd95770c718e81d08fb11a) (https://github.com/llvm-mirror/llvm 18481855bdfa1b4a424f81be8525db002671348d)"}
85!16 = distinct !DISubprogram(name: "fn1", scope: !3, file: !3, line: 5, type: !17, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !19)
86!17 = !DISubroutineType(types: !18)
87!18 = !{null, !9}
88!19 = !{!20, !21, !22}
89!20 = !DILocalVariable(name: "p1", arg: 1, scope: !16, file: !3, line: 5, type: !9)
90!21 = !DILocalVariable(name: "b", scope: !16, file: !3, line: 6, type: !6)
91!22 = !DILocalVariable(name: "c", scope: !16, file: !3, line: 6, type: !6)
92!23 = !DIExpression()
93!24 = !DILocation(line: 5, column: 16, scope: !16)
94!25 = !DILocation(line: 6, column: 13, scope: !16)
95!26 = !DILocation(line: 6, column: 16, scope: !16)
96!27 = !DIExpression(DW_OP_LLVM_fragment, 0, 32)
97!28 = !DIExpression(DW_OP_LLVM_fragment, 32, 32)
98!29 = !DIExpression(DW_OP_LLVM_fragment, 32, 16)
99!30 = !DILocation(line: 8, column: 9, scope: !16)
100!31 = !DILocation(line: 9, column: 1, scope: !16)
101!32 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 11, type: !33, isLocal: false, isDefinition: true, scopeLine: 11, isOptimized: true, unit: !2, retainedNodes: !4)
102!33 = !DISubroutineType(types: !34)
103!34 = !{!11}
104!35 = !DILocation(line: 11, column: 14, scope: !32)
105
106