1 ; REQUIRES: object-emission
3 ; Check that when variables are allocated on the stack we generate debug locations
4 ; for the stack location directly instead of generating a register+offset indirection.
6 ; RUN: llc -O2 -filetype=obj -disable-post-ra -mtriple=x86_64-unknown-linux-gnu < %s \
7 ; RUN: | llvm-dwarfdump -v - | FileCheck %s
14 ; extern void foo(int i, int *p);
25 ; CHECK: .debug_info contents
26 ; CHECK: DW_TAG_subprogram
28 ; CHECK: DW_TAG_variable
29 ; CHECK: DW_AT_location [DW_FORM_sec_offset] ({{.*}}
30 ; CHECK-NEXT: [{{0x.*}}, {{0x.*}}): DW_OP_reg0 RAX
32 ; Note: This is a location, so we don't want an extra DW_OP_deref at the end.
33 ; LLDB gets the location right without it:
34 ; Variable: ... name = "val", type = "int", location = [rsp+4], decl = frame.c:10
35 ; Adding the deref actually creates an invalid location:
36 ; ... [rsp+4] DW_OP_deref
38 ; CHECK-NEXT: [{{0x.*}}, {{0x.*}}): DW_OP_breg7 RSP+4)
39 ; CHECK-NEXT: DW_AT_name {{.*}}"val"
41 ; ModuleID = 'frame.c'
42 source_filename = "frame.c"
44 @data = global i32 17, align 4, !dbg !0
45 @sum = local_unnamed_addr global i32 0, align 4, !dbg !6
46 @zero = local_unnamed_addr global i32 0, align 4, !dbg !9
47 @ptr = common local_unnamed_addr global i32* null, align 8, !dbg !11
49 define i32 @main() local_unnamed_addr !dbg !17 {
51 %val = alloca i32, align 4
52 %0 = bitcast i32* %val to i8*, !dbg !22
53 call void @llvm.lifetime.start(i64 4, i8* %0), !dbg !22
54 %1 = load i32, i32* @data, align 4, !dbg !23, !tbaa !24
55 tail call void @llvm.dbg.value(metadata i32 %1, metadata !21, metadata !28), !dbg !29
56 store i32 %1, i32* %val, align 4, !dbg !30, !tbaa !24
57 tail call void @llvm.dbg.value(metadata i32* %val, metadata !21, metadata !31), !dbg !29
58 call void @foo(i32 1, i32* nonnull %val), !dbg !32
59 call void @foo(i32 2, i32* nonnull @data), !dbg !33
60 %2 = load i32, i32* @zero, align 4, !dbg !34, !tbaa !24
61 call void @llvm.lifetime.end(i64 4, i8* %0), !dbg !35
65 ; Function Attrs: argmemonly nounwind
66 declare void @llvm.lifetime.start(i64, i8* nocapture) #0
68 declare void @foo(i32, i32*) local_unnamed_addr
70 ; Function Attrs: argmemonly nounwind
71 declare void @llvm.lifetime.end(i64, i8* nocapture) #0
73 ; Function Attrs: nounwind readnone
74 declare void @llvm.dbg.value(metadata, metadata, metadata) #1
76 attributes #0 = { argmemonly nounwind }
77 attributes #1 = { nounwind readnone }
80 !llvm.module.flags = !{!14, !15}
83 !0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
84 !1 = !DIGlobalVariable(name: "data", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
85 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.9.0 (trunk 273961)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
86 !3 = !DIFile(filename: "frame.c", directory: "/home/user/test")
88 !5 = !{!0, !6, !9, !11}
89 !6 = distinct !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
90 !7 = !DIGlobalVariable(name: "sum", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
91 !8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
92 !9 = distinct !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
93 !10 = !DIGlobalVariable(name: "zero", scope: !2, file: !3, line: 3, type: !8, isLocal: false, isDefinition: true)
94 !11 = distinct !DIGlobalVariableExpression(var: !12, expr: !DIExpression())
95 !12 = !DIGlobalVariable(name: "ptr", scope: !2, file: !3, line: 4, type: !13, isLocal: false, isDefinition: true)
96 !13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 64)
97 !14 = !{i32 2, !"Dwarf Version", i32 4}
98 !15 = !{i32 2, !"Debug Info Version", i32 3}
99 !16 = !{!"clang version 3.9.0 (trunk 273961)"}
100 !17 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 8, type: !18, isLocal: false, isDefinition: true, scopeLine: 9, isOptimized: true, unit: !2, retainedNodes: !20)
101 !18 = !DISubroutineType(types: !19)
104 !21 = !DILocalVariable(name: "val", scope: !17, file: !3, line: 10, type: !8)
105 !22 = !DILocation(line: 10, column: 3, scope: !17)
106 !23 = !DILocation(line: 11, column: 9, scope: !17)
107 !24 = !{!25, !25, i64 0}
108 !25 = !{!"int", !26, i64 0}
109 !26 = !{!"omnipotent char", !27, i64 0}
110 !27 = !{!"Simple C/C++ TBAA"}
111 !28 = !DIExpression()
112 !29 = !DILocation(line: 10, column: 7, scope: !17)
113 !30 = !DILocation(line: 11, column: 7, scope: !17)
114 !31 = !DIExpression(DW_OP_deref)
115 !32 = !DILocation(line: 12, column: 3, scope: !17)
116 !33 = !DILocation(line: 13, column: 3, scope: !17)
117 !34 = !DILocation(line: 14, column: 10, scope: !17)
118 !35 = !DILocation(line: 15, column: 1, scope: !17)
119 !36 = !DILocation(line: 14, column: 3, scope: !17)