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
|
# RUN: llc --run-pass=livedebugvalues %s -o - -experimental-debug-variable-locations | FileCheck %s
## Tests that when a block that is not directly reachable from the entry block
## contains a DBG_PHI, we treat those DBG_PHIs as referring to live-in values,
## and resolve them for users as normal.
## FIXME: "def" currently does not have a value due to blocks that are not
## directly reachable from the entry block not being fully covered by the
## LiveDebugValues analysis.
# CHECK-DAG: ![[UNDEFVAR:[0-9]+]] = !DILocalVariable(name: "undef"
# CHECK-DAG: ![[DEFVAR:[0-9]+]] = !DILocalVariable(name: "def"
# CHECK-LABEL: bb.1.bb1
# CHECK: DBG_VALUE_LIST ![[UNDEFVAR]], {{.+}}, $noreg
# CHECK-LABEL: bb.4.bb3
# CHECK: DBG_VALUE_LIST ![[DEFVAR]], {{.+}}, $noreg
--- |
; ModuleID = 'llvm/test/DebugInfo/X86/instr-ref-unreachable.mir'
source_filename = "/tmp/b.ll"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@global = private constant [2 x ptr] [ptr blockaddress(@foo, %bb3), ptr blockaddress(@foo, %bb1)]
define ptr @foo() !dbg !4 {
bb:
br label %bb3
bb1: ; preds = %bb3
call void @llvm.dbg.value(metadata i64 %phi, metadata !6, metadata !DIExpression()), !dbg !8
call void @llvm.dbg.value(metadata i64 %phi, metadata !9, metadata !DIExpression()), !dbg !8
store i32 0, ptr null, align 4, !dbg !10
%getelementptr = getelementptr i32, ptr null, i64 %phi
store i32 0, ptr %getelementptr, align 4
br label %bb2
bb2: ; preds = %bb2, %bb1
%select = select i1 false, i1 false, i1 false
br i1 %select, label %bb3, label %bb2
bb3: ; preds = %bb2, %bb
%phi = phi i64 [ 1, %bb ], [ 0, %bb2 ]
br label %bb1
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2, splitDebugInlining: false, nameTableKind: GNU)
!1 = !DIFile(filename: "test.cpp", directory: ".")
!2 = !{}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = distinct !DISubprogram(name: "GetNumericFormat", linkageName: "f", scope: null, file: !1, line: 980, type: !5, scopeLine: 984, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
!5 = distinct !DISubroutineType(types: !2)
!6 = !DILocalVariable(name: "undef", scope: !4, file: !1, line: 263, type: !7)
!7 = !DIBasicType(name: "unsigned long", size: 64, encoding: DW_ATE_unsigned)
!8 = !DILocation(line: 0, scope: !4)
!9 = !DILocalVariable(name: "def", scope: !4, file: !1, line: 263, type: !7)
!10 = !DILocation(line: 151, column: 41, scope: !4)
...
---
name: foo
alignment: 16
tracksRegLiveness: true
debugInstrRef: true
tracksDebugUserValues: true
frameInfo:
maxAlignment: 1
body: |
bb.0.bb:
successors: %bb.1(0x80000000)
$ecx = MOV32ri 1, implicit-def $rcx
renamable $al = MOV8ri 1
bb.1.bb1 (ir-block-address-taken %ir-block.bb1, align 16):
successors: %bb.2(0x80000000)
liveins: $al, $rcx
DBG_INSTR_REF !6, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !8
MOV32mi $noreg, 1, $noreg, 0, $noreg, 0, debug-location !10 :: (store (s32) into `ptr null`)
MOV32mi $noreg, 4, killed renamable $rcx, 0, $noreg, 0 :: (store (s32) into %ir.getelementptr)
bb.2.bb2 (align 16):
successors: %bb.3(0x04000000), %bb.2(0x7c000000)
liveins: $al
TEST8rr renamable $al, renamable $al, implicit-def $eflags
JCC_1 %bb.2, 5, implicit killed $eflags
bb.3:
successors: %bb.1(0x80000000)
liveins: $al
renamable $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def dead $eflags, implicit-def $rcx
JMP_1 %bb.1
bb.4.bb3 (ir-block-address-taken %ir-block.bb3):
successors: %bb.1(0x80000000)
liveins: $al, $rcx
DBG_PHI $rcx, 1
DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !8
JMP_1 %bb.1
...
|
