1; RUN: llc -filetype=obj -o - < %s | llvm-dwarfdump -debug-info - | FileCheck %s
2;
3; Checks that we're omitting the first range, as it is empty, and that we're
4; emitting one that spans the rest of the function. In this case, the first
5; range, which we omit, describes 8 bytes of the variable using DW_OP_litX,
6; whereas the second one only describes 4 bytes, so clobbering the whole 8 byte
7; fragment with the 4 bytes fragment isn't necessarily best thing to do here,
8; but it is what is currently being emitted. Any change here needs to be
9; intentional, so the test is very specific.
10;
11; The variable is given a single location instead of a location list entry
12; because the function validThroughout has a special code path for single
13; locations with a constant value that start in the prologue.
14;
15; CHECK:      DW_TAG_inlined_subroutine
16; CHECK:        DW_TAG_variable
17; CHECK-NEXT:     DW_AT_location (DW_OP_lit0, DW_OP_stack_value, DW_OP_piece 0x4)
18; CHECK-NEXT      DW_AT_name ("i4")
19
20; Created form the following test case (PR26163) with
21; clang -cc1 -triple armv4t--freebsd11.0-gnueabi -emit-obj -debug-info-kind=standalone -O2 -x c test.c
22;
23; typedef	unsigned int	size_t;
24; struct timeval {
25; 	long long tv_sec;
26; 	int tv_usec;
27; };
28;
29; void *memset(void *, int, size_t);
30; void foo(void);
31;
32; static void
33; bar(int value)
34; {
35; 	struct timeval lifetime;
36;
37; 	memset(&lifetime, 0, sizeof(struct timeval));
38; 	lifetime.tv_sec = value;
39;
40; 	foo();
41; }
42;
43; int
44; parse_config_file(void)
45; {
46; 	int value;
47;
48; 	bar(value);
49; 	return (0);
50; }
51
52target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
53target triple = "armv4t--freebsd11.0-gnueabi"
54
55%struct.timeval = type { i64, i32 }
56
57declare void @llvm.dbg.declare(metadata, metadata, metadata)
58declare void @llvm.dbg.value(metadata, metadata, metadata)
59
60declare void @foo()
61
62define i32 @parse_config_file() !dbg !4 {
63entry:
64  tail call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !26), !dbg !27
65  tail call void @llvm.dbg.declare(metadata %struct.timeval* undef, metadata !16, metadata !26), !dbg !29
66  tail call void @llvm.dbg.value(metadata i64 0, metadata !16, metadata !30), !dbg !29
67  tail call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !31), !dbg !29
68  tail call void @foo() #3, !dbg !32
69  ret i32 0, !dbg !33
70}
71
72
73!llvm.dbg.cu = !{!0}
74!llvm.module.flags = !{!22, !23, !24}
75!llvm.ident = !{!25}
76
77!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
78!1 = !DIFile(filename: "<stdin>", directory: "/home/ubuntu/bugs")
79!2 = !{}
80!4 = distinct !DISubprogram(name: "parse_config_file", scope: !5, file: !5, line: 22, type: !6, isLocal: false, isDefinition: true, scopeLine: 23, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !9)
81!5 = !DIFile(filename: "test.c", directory: "/home/ubuntu/bugs")
82!6 = !DISubroutineType(types: !7)
83!7 = !{!8}
84!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
85!9 = !{!10}
86!10 = !DILocalVariable(name: "value", scope: !4, file: !5, line: 24, type: !8)
87!11 = distinct !DISubprogram(name: "bar", scope: !5, file: !5, line: 11, type: !12, isLocal: true, isDefinition: true, scopeLine: 12, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !14)
88!12 = !DISubroutineType(types: !13)
89!13 = !{null, !8}
90!14 = !{!15, !16}
91!15 = !DILocalVariable(name: "value", arg: 1, scope: !11, file: !5, line: 11, type: !8)
92!16 = !DILocalVariable(name: "lifetime", scope: !11, file: !5, line: 13, type: !17)
93!17 = !DICompositeType(tag: DW_TAG_structure_type, name: "timeval", file: !5, line: 2, size: 128, align: 64, elements: !18)
94!18 = !{!19, !21}
95!19 = !DIDerivedType(tag: DW_TAG_member, name: "tv_sec", scope: !17, file: !5, line: 3, baseType: !20, size: 64, align: 64)
96!20 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)
97!21 = !DIDerivedType(tag: DW_TAG_member, name: "tv_usec", scope: !17, file: !5, line: 4, baseType: !8, size: 32, align: 32, offset: 64)
98!22 = !{i32 2, !"Debug Info Version", i32 3}
99!23 = !{i32 1, !"wchar_size", i32 4}
100!24 = !{i32 1, !"min_enum_size", i32 4}
101!25 = !{!"clang version 3.9.0"}
102!26 = !DIExpression()
103!27 = !DILocation(line: 11, scope: !11, inlinedAt: !28)
104!28 = distinct !DILocation(line: 26, scope: !4)
105!29 = !DILocation(line: 13, scope: !11, inlinedAt: !28)
106!30 = !DIExpression(DW_OP_LLVM_fragment, 0, 64)
107!31 = !DIExpression(DW_OP_LLVM_fragment, 0, 32)
108!32 = !DILocation(line: 18, scope: !11, inlinedAt: !28)
109!33 = !DILocation(line: 27, scope: !4)
110