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
| ; RUN: llc -mtriple=x86_64-unknown-unknown -start-after=codegenprepare -stop-before finalize-isel %s -o - | FileCheck %s
; Test that the dbg.value for %baz, which doesn't exist in the 'next' bb,
; can be salvaged back to the underlying argument vreg.
; CHECK: ![[AAAVAR:.*]] = !DILocalVariable(name: "aaa",
; CHECK-LABEL: bb.1.next:
; CHECK: DBG_VALUE %{{[0-9]+}}, $noreg, ![[AAAVAR]]
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-linux-gnu"
define i8 @f(i32* %foo) local_unnamed_addr !dbg !6 {
entry:
%bar = getelementptr i32, i32* %foo, i32 4
%baz = bitcast i32* %bar to i8*
%quux = load i8, i8* %baz
br label %next
next: ; preds = %entry
tail call void @llvm.dbg.value(metadata i8* %baz, metadata !15, metadata !DIExpression()), !dbg !30
%xyzzy = add i8 %quux, 123
br label %fin
fin: ; preds = %next
%trains = getelementptr i32, i32* %foo, i32 3
%planes = bitcast i32* %trains to i8*
%cars = load i8, i8* %planes
%ret = add i8 %xyzzy, %cars
ret i8 %ret
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #0
attributes #0 = { nounwind readnone speculatable }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!25, !26, !27, !28}
!llvm.ident = !{!29}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "test.c", directory: ".")
!2 = !{}
!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 18, type: !7, scopeLine: 19, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14)
!7 = !DISubroutineType(types: !8)
!8 = !{!13}
!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_unsigned)
!14 = !{!15}
!15 = !DILocalVariable(name: "aaa", scope: !6, file: !1, line: 18, type: !13)
!25 = !{i32 2, !"Dwarf Version", i32 4}
!26 = !{i32 2, !"Debug Info Version", i32 3}
!27 = !{i32 1, !"wchar_size", i32 4}
!28 = !{i32 7, !"PIC Level", i32 2}
!29 = !{!"clang"}
!30 = !DILocation(line: 18, column: 14, scope: !6)
|