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
|
; RUN: llc -O0 < %s | FileCheck %s
source_filename = "t.c"
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
target triple = "i386-pc-windows-msvc19.0.24215"
@str_const = internal unnamed_addr constant [4 x i8] c"str\00", align 1
declare i32 @puts(i8*)
declare void @use_i32(i32*)
declare void @llvm.dbg.value(metadata, metadata, metadata) nounwind readnone
; We had a line info quality issue where the LEA for the string constant had no
; location info, so the .cv_loc directive appeared after it. Now we have logic
; that tries to emit the first valid location to the top of each MBB.
define void @lea_str_loc(i1 %cond) !dbg !8 {
entry:
br i1 %cond, label %if.then, label %if.end, !dbg !17
if.then: ; preds = %entry
br label %return, !dbg !18
if.end: ; preds = %entry
%call = call i32 @puts(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @str_const, i32 0, i32 0)), !dbg !19
br label %return, !dbg !20
return: ; preds = %if.end, %if.then
ret void, !dbg !20
}
; The t.c:5 line marker should appear immediately after the BB label.
; CHECK-LABEL: _lea_str_loc:
; CHECK: .cv_loc {{.*}} # t.c:4:5
; CHECK: jmp LBB{{.*}}
; CHECK: LBB0_{{.*}}: # %if.end
; CHECK-NEXT: .cv_loc {{.*}} # t.c:5:3
; CHECK-NEXT: leal _str_const, %[[reg:[^ ]*]]
; CHECK-NEXT: movl %[[reg]], (%esp)
; CHECK-NEXT: calll _puts
define void @instr_no_loc(i1 %cond) !dbg !21 {
entry:
br i1 %cond, label %if.then, label %if.end, !dbg !22
if.then: ; preds = %entry
br label %return, !dbg !23
if.end: ; preds = %entry
call void asm sideeffect "nop", ""()
%call = call i32 @puts(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @str_const, i32 0, i32 0)), !dbg !24
br label %return, !dbg !25
return: ; preds = %if.end, %if.then
ret void, !dbg !25
}
; CHECK-LABEL: _instr_no_loc:
; CHECK: .cv_loc {{.*}} # t.c:4:5
; CHECK: jmp LBB{{.*}}
; CHECK: LBB1_{{.*}}: # %if.end
; CHECK-NEXT: .cv_loc {{.*}} # t.c:5:3
; CHECK-NEXT: #APP
; CHECK-NEXT: nop
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: leal _str_const, %[[reg:[^ ]*]]
; CHECK-NEXT: movl %[[reg]], (%esp)
; CHECK-NEXT: calll _puts
define void @lea_dbg_value(i1 %cond) !dbg !30 {
entry:
%value = alloca i32
store i32 42, i32* %value
br i1 %cond, label %if.then, label %if.end, !dbg !31
if.then: ; preds = %entry
br label %return, !dbg !32
if.end: ; preds = %entry
call void @llvm.dbg.value(metadata i32* %value, metadata !35, metadata !13), !dbg !34
call void @use_i32(i32* %value), !dbg !33
br label %return, !dbg !34
return: ; preds = %if.end, %if.then
ret void, !dbg !34
}
; CHECK-LABEL: _lea_dbg_value:
; CHECK: .cv_loc {{.*}} # t.c:4:5
; CHECK: jmp LBB{{.*}}
; CHECK: LBB2_{{.*}}: # %if.end
; CHECK-NEXT: .cv_loc {{.*}} # t.c:5:3
; CHECK: leal 4(%esp), %[[reg:[^ ]*]]
; CHECK: #DEBUG_VALUE: lea_dbg_value:v <- [DW_OP_deref] $[[reg]]
; CHECK: movl %[[reg]], (%esp)
; CHECK: calll _use_i32
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "b32df088e991f1996b4e4deb3855c14b")
!2 = !{}
!3 = !{i32 1, !"NumRegisterParameters", i32 0}
!4 = !{i32 2, !"CodeView", i32 1}
!5 = !{i32 2, !"Debug Info Version", i32 3}
!6 = !{i32 1, !"wchar_size", i32 2}
!7 = !{!"clang version 5.0.0 "}
!8 = distinct !DISubprogram(name: "lea_str_loc", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!9 = !DISubroutineType(types: !10)
!10 = !{null, !11}
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13 = !DIExpression(DW_OP_deref)
!14 = !DILocation(line: 2, column: 12, scope: !8)
!15 = !DILocation(line: 3, column: 7, scope: !16)
!16 = distinct !DILexicalBlock(scope: !8, file: !1, line: 3, column: 7)
!17 = !DILocation(line: 3, column: 7, scope: !8)
!18 = !DILocation(line: 4, column: 5, scope: !16)
!19 = !DILocation(line: 5, column: 3, scope: !8)
!20 = !DILocation(line: 6, column: 1, scope: !8)
!21 = distinct !DISubprogram(name: "instr_no_loc", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!22 = !DILocation(line: 3, column: 7, scope: !21)
!23 = !DILocation(line: 4, column: 5, scope: !21)
!24 = !DILocation(line: 5, column: 3, scope: !21)
!25 = !DILocation(line: 6, column: 1, scope: !21)
!30 = distinct !DISubprogram(name: "lea_dbg_value", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!31 = !DILocation(line: 3, column: 7, scope: !30)
!32 = !DILocation(line: 4, column: 5, scope: !30)
!33 = !DILocation(line: 5, column: 3, scope: !30)
!34 = !DILocation(line: 6, column: 1, scope: !30)
!35 = !DILocalVariable(name: "v", scope: !30, file: !1, line: 3, type: !11)
|
