1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
| ; RUN: llc -march=mips -mcpu=mips32r2 -O1 -filetype=obj -relocation-model=pic <%s | \
; RUN: llvm-dwarfdump -v -all - | FileCheck %s
; void foo(int *);
;
; int f0(int a, int b, int c, int d, int e) {
; int x = a + b + c + d + e;
; foo(&x);
; return x;
; }
;
; int f1(int a, int b, int c, int d, int e) {
; int x __attribute__((aligned(16))) = a + b + c + d + e;
; foo(&x);
; return x;
; }
declare void @llvm.lifetime.start(i64, i8* nocapture)
declare void @llvm.lifetime.end(i64, i8* nocapture)
declare void @foo(i32*)
; CHECK: DW_AT_name {{.*}}"f0"
; CHECK: DW_AT_name {{.*}}"e"
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (
; CHECK-NEXT: [0x00000028, 0x0000002c): DW_OP_reg1 AT_64
; CHECK-NEXT: [0x0000002c, 0x00000048): DW_OP_breg29 SP_64+16)
; CHECK-NEXT: DW_AT_name [DW_FORM_strp] ( .debug_str[0x0000006b] = "x")
define i32 @f0(i32 signext %a, i32 signext %b, i32 signext %c, i32 signext %d, i32 signext %e) !dbg !4 {
entry:
%x = alloca i32, align 4
tail call void @llvm.dbg.value(metadata i32 %a, metadata !9, metadata !DIExpression()), !dbg !27
tail call void @llvm.dbg.value(metadata i32 %b, metadata !10, metadata !DIExpression()), !dbg !28
tail call void @llvm.dbg.value(metadata i32 %c, metadata !11, metadata !DIExpression()), !dbg !29
tail call void @llvm.dbg.value(metadata i32 %d, metadata !12, metadata !DIExpression()), !dbg !30
tail call void @llvm.dbg.value(metadata i32 %e, metadata !13, metadata !DIExpression()), !dbg !31
%0 = bitcast i32* %x to i8*, !dbg !32
call void @llvm.lifetime.start(i64 4, i8* %0) #4, !dbg !32
%add = add nsw i32 %b, %a, !dbg !33
%add1 = add nsw i32 %add, %c, !dbg !34
%add2 = add nsw i32 %add1, %d, !dbg !35
%add3 = add nsw i32 %add2, %e, !dbg !36
tail call void @llvm.dbg.value(metadata i32 %add3, metadata !14, metadata !DIExpression()), !dbg !37
store i32 %add3, i32* %x, align 4, !dbg !37, !tbaa !38
tail call void @llvm.dbg.value(metadata i32* %x, metadata !14, metadata !26), !dbg !37
call void @foo(i32* nonnull %x) #4, !dbg !42
call void @llvm.dbg.value(metadata i32* %x, metadata !14, metadata !26), !dbg !37
%1 = load i32, i32* %x, align 4, !dbg !43, !tbaa !38
call void @llvm.lifetime.end(i64 4, i8* %0) #4, !dbg !44
ret i32 %1, !dbg !45
}
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (
; CHECK-NEXT: [0x00000080, 0x00000084): DW_OP_reg1 AT_64
; CHECK-NEXT: [0x00000084, 0x00000098): DW_OP_breg29 SP_64+16)
; CHECK-NEXT: DW_AT_name [DW_FORM_strp] ( .debug_str[0x0000006b] = "x")
define i32 @f1(i32 signext %a, i32 signext %b, i32 signext %c, i32 signext %d, i32 signext %e) !dbg !15 {
entry:
%x = alloca i32, align 16
tail call void @llvm.dbg.value(metadata i32 %a, metadata !17, metadata !DIExpression()), !dbg !46
tail call void @llvm.dbg.value(metadata i32 %b, metadata !18, metadata !DIExpression()), !dbg !47
tail call void @llvm.dbg.value(metadata i32 %c, metadata !19, metadata !DIExpression()), !dbg !48
tail call void @llvm.dbg.value(metadata i32 %d, metadata !20, metadata !DIExpression()), !dbg !49
tail call void @llvm.dbg.value(metadata i32 %e, metadata !21, metadata !DIExpression()), !dbg !50
%0 = bitcast i32* %x to i8*, !dbg !51
call void @llvm.lifetime.start(i64 4, i8* %0) #4, !dbg !51
%add = add nsw i32 %b, %a, !dbg !52
%add1 = add nsw i32 %add, %c, !dbg !53
%add2 = add nsw i32 %add1, %d, !dbg !54
%add3 = add nsw i32 %add2, %e, !dbg !55
tail call void @llvm.dbg.value(metadata i32 %add3, metadata !22, metadata !DIExpression()), !dbg !56
store i32 %add3, i32* %x, align 16, !dbg !56, !tbaa !38
tail call void @llvm.dbg.value(metadata i32* %x, metadata !22, metadata !26), !dbg !56
call void @foo(i32* nonnull %x) #4, !dbg !57
call void @llvm.dbg.value(metadata i32* %x, metadata !22, metadata !26), !dbg !56
%1 = load i32, i32* %x, align 16, !dbg !58, !tbaa !38
call void @llvm.lifetime.end(i64 4, i8* %0) #4, !dbg !59
ret i32 %1, !dbg !60
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!23, !24}
!llvm.ident = !{!25}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 251783) (llvm/trunk 251781)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "test.c", directory: "/home/vk/repos/tmp/dwarf")
!2 = !{}
!4 = distinct !DISubprogram(name: "f0", scope: !1, file: !1, line: 4, type: !5, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
!5 = !DISubroutineType(types: !6)
!6 = !{!7, !7, !7, !7, !7, !7}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !{!9, !10, !11, !12, !13, !14}
!9 = !DILocalVariable(name: "a", arg: 1, scope: !4, file: !1, line: 4, type: !7)
!10 = !DILocalVariable(name: "b", arg: 2, scope: !4, file: !1, line: 4, type: !7)
!11 = !DILocalVariable(name: "c", arg: 3, scope: !4, file: !1, line: 4, type: !7)
!12 = !DILocalVariable(name: "d", arg: 4, scope: !4, file: !1, line: 4, type: !7)
!13 = !DILocalVariable(name: "e", arg: 5, scope: !4, file: !1, line: 4, type: !7)
!14 = !DILocalVariable(name: "x", scope: !4, file: !1, line: 5, type: !7)
!15 = distinct !DISubprogram(name: "f1", scope: !1, file: !1, line: 11, type: !5, isLocal: false, isDefinition: true, scopeLine: 11, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !16)
!16 = !{!17, !18, !19, !20, !21, !22}
!17 = !DILocalVariable(name: "a", arg: 1, scope: !15, file: !1, line: 11, type: !7)
!18 = !DILocalVariable(name: "b", arg: 2, scope: !15, file: !1, line: 11, type: !7)
!19 = !DILocalVariable(name: "c", arg: 3, scope: !15, file: !1, line: 11, type: !7)
!20 = !DILocalVariable(name: "d", arg: 4, scope: !15, file: !1, line: 11, type: !7)
!21 = !DILocalVariable(name: "e", arg: 5, scope: !15, file: !1, line: 11, type: !7)
!22 = !DILocalVariable(name: "x", scope: !15, file: !1, line: 12, type: !7)
!23 = !{i32 2, !"Dwarf Version", i32 4}
!24 = !{i32 2, !"Debug Info Version", i32 3}
!25 = !{!"clang version 3.8.0 (trunk 251783) (llvm/trunk 251781)"}
!26 = !DIExpression(DW_OP_deref)
!27 = !DILocation(line: 4, column: 12, scope: !4)
!28 = !DILocation(line: 4, column: 19, scope: !4)
!29 = !DILocation(line: 4, column: 26, scope: !4)
!30 = !DILocation(line: 4, column: 33, scope: !4)
!31 = !DILocation(line: 4, column: 40, scope: !4)
!32 = !DILocation(line: 5, column: 3, scope: !4)
!33 = !DILocation(line: 5, column: 13, scope: !4)
!34 = !DILocation(line: 5, column: 17, scope: !4)
!35 = !DILocation(line: 5, column: 21, scope: !4)
!36 = !DILocation(line: 5, column: 25, scope: !4)
!37 = !DILocation(line: 5, column: 7, scope: !4)
!38 = !{!39, !39, i64 0}
!39 = !{!"int", !40, i64 0}
!40 = !{!"omnipotent char", !41, i64 0}
!41 = !{!"Simple C/C++ TBAA"}
!42 = !DILocation(line: 6, column: 3, scope: !4)
!43 = !DILocation(line: 7, column: 10, scope: !4)
!44 = !DILocation(line: 8, column: 1, scope: !4)
!45 = !DILocation(line: 7, column: 3, scope: !4)
!46 = !DILocation(line: 11, column: 12, scope: !15)
!47 = !DILocation(line: 11, column: 19, scope: !15)
!48 = !DILocation(line: 11, column: 26, scope: !15)
!49 = !DILocation(line: 11, column: 33, scope: !15)
!50 = !DILocation(line: 11, column: 40, scope: !15)
!51 = !DILocation(line: 12, column: 3, scope: !15)
!52 = !DILocation(line: 12, column: 42, scope: !15)
!53 = !DILocation(line: 12, column: 46, scope: !15)
!54 = !DILocation(line: 12, column: 50, scope: !15)
!55 = !DILocation(line: 12, column: 54, scope: !15)
!56 = !DILocation(line: 12, column: 7, scope: !15)
!57 = !DILocation(line: 13, column: 3, scope: !15)
!58 = !DILocation(line: 14, column: 10, scope: !15)
!59 = !DILocation(line: 15, column: 1, scope: !15)
!60 = !DILocation(line: 14, column: 3, scope: !15)
|