1# RUN: llc -start-after=phi-node-elimination -stop-after=virtregrewriter %s -mtriple=x86_64-unknown-unknown -o - -experimental-debug-variable-locations | FileCheck %s
2# RUN: llc -O0 -start-after=phi-node-elimination -stop-after=regallocfast %s -mtriple=x86_64-unknown-unknown -o - -experimental-debug-variable-locations | FileCheck %s --check-prefix=FASTREG
3#
4# Test that DBG_INSTR_REFs can pass through livedebugvariables to the end of
5# regalloc without problem. Program body copied from
6# livedebugvars-crossbb-interval.mir.
7#
8# CHECK-LABEL: bb.0:
9# CHECK:       DBG_INSTR_REF 1, 0
10# CHECK-NEXT:  JMP_1
11# CHECK-LABEL: bb.1:
12# CHECK:       DBG_INSTR_REF 2, 0
13# CHECK-NEXT:  JMP_1
14# CHECK-LABEL: bb.2:
15# CHECK:       DBG_INSTR_REF 3, 0
16# CHECK-NEXT:  CALL64pcrel32
17# CHECK-LABEL: bb.3:
18# CHECK:       DBG_INSTR_REF 4, 0
19# CHECK-NEXT:  JMP_1
20#
21#
22# The fast register allocator puts some spills in -- these are no-ops as far
23# as the slot indexes are concerned. It doesn't matter which side of spills
24# the DBG_INSTR_REF lands on.
25#
26# FASTREG-LABEL: bb.0:
27# FASTREG-DAG:   DBG_INSTR_REF 1, 0
28# FASTREG-DAG:   MOV64mr
29# FASTREG-DAG:   MOV32mr
30# FASTREG-NEXT:  JMP_1
31# FASTREG-LABEL: bb.1:
32# FASTREG:       DBG_INSTR_REF 2, 0
33# FASTREG-NEXT:  JMP_1
34# FASTREG-LABEL: bb.2:
35# FASTREG:       DBG_INSTR_REF 3, 0
36# FASTREG-NEXT:  CALL64pcrel32
37# FASTREG-LABEL: bb.3:
38# FASTREG-DAG:   MOV32rm
39# FASTREG-DAG:   DBG_INSTR_REF 4, 0
40# FASTREG-DAG:   MOV32mr
41# FASTREG-NEXT:  JMP_1
42# FASTREG-LABEL: bb.4:
43# FASTREG:       DBG_INSTR_REF 5, 0
44# FASTREG-NEXT:  RETQ
45
46--- |
47  ; ModuleID = 'tmp.ll'
48  source_filename = "tmp.ll"
49  target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
50
51  %struct.a = type { i32 }
52
53  ; Function Attrs: nounwind ssp
54  define i32 @bar() !dbg !4 {
55    ret i32 0, !dbg !18
56  }
57
58  declare i32 @foo();
59
60  ; Function Attrs: nounwind readnone speculatable willreturn
61  declare void @llvm.dbg.value(metadata, metadata, metadata)
62
63  !llvm.dbg.cu = !{!0}
64  !llvm.module.flags = !{!3}
65
66  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "asdf", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2)
67  !1 = !DIFile(filename: "bar.c", directory: "asdf")
68  !2 = !{}
69  !3 = !{i32 1, !"Debug Info Version", i32 3}
70  !4 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 5, type: !5, virtualIndex: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
71  !5 = !DISubroutineType(types: !6)
72  !6 = !{!7}
73  !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
74  !8 = !{!9, !14}
75  !9 = !DILocalVariable(name: "b", arg: 1, scope: !4, file: !1, line: 5, type: !10)
76  !10 = !DIDerivedType(tag: DW_TAG_pointer_type, scope: !0, baseType: !11, size: 64, align: 64)
77  !11 = !DICompositeType(tag: DW_TAG_structure_type, name: "a", scope: !0, file: !1, line: 1, size: 32, align: 32, elements: !12)
78  !12 = !{!13}
79  !13 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !1, file: !1, line: 2, baseType: !7, size: 32, align: 32)
80  !14 = !DILocalVariable(name: "x", scope: !15, file: !1, line: 6, type: !7)
81  !15 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 22)
82  !16 = !DILocation(line: 5, column: 19, scope: !4)
83  !17 = !DILocation(line: 6, column: 14, scope: !15)
84  !18 = !DILocation(line: 8, column: 2, scope: !15)
85  !19 = !DILocation(line: 7, column: 2, scope: !15)
86
87...
88---
89name:            bar
90alignment:       16
91tracksRegLiveness: true
92registers:
93  - { id: 0, class: gr64 }
94  - { id: 1, class: gr32 }
95  - { id: 2, class: gr64 }
96  - { id: 3, class: gr64 }
97  - { id: 4, class: gr32 }
98  - { id: 5, class: gr32 }
99  - { id: 6, class: gr32 }
100  - { id: 7, class: gr32 }
101liveins:
102  - { reg: '$rdi', virtual-reg: '%2' }
103  - { reg: '$esi', virtual-reg: '%4' }
104frameInfo:
105  hasCalls:        true
106machineFunctionInfo: {}
107body:             |
108  bb.0:
109    liveins: $rdi, $esi
110
111    %4:gr32 = COPY $esi
112    %2:gr64 = COPY $rdi
113    %3:gr64 = COPY killed %2
114    %5:gr32 = COPY killed %4
115    DBG_INSTR_REF 1, 0, !9, !DIExpression(), debug-location !16
116    JMP_1 %bb.3
117
118  bb.1:
119    DBG_INSTR_REF 2, 0, !9, !DIExpression(), debug-location !16
120    JMP_1 %bb.4
121
122  bb.2:
123    ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !19
124    $edi = COPY %6, debug-location !19
125    $al = MOV8ri 0, debug-location !19
126    DBG_INSTR_REF 3, 0, !9, !DIExpression(), debug-location !16
127    CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit $edi, implicit-def $eax, debug-location !19
128    ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !19
129    %7:gr32 = COPY $eax, debug-location !19
130    JMP_1 %bb.1
131
132  bb.3:
133    %6:gr32 = MOV32rm %3, 1, $noreg, 0, $noreg, debug-location !17
134    DBG_INSTR_REF 4, 0, !9, !DIExpression(), debug-location !16
135    JMP_1 %bb.2
136
137  bb.4:
138    $eax = COPY %5, debug-location !18
139    DBG_INSTR_REF 5, 0, !9, !DIExpression(), debug-location !16
140    RETQ implicit $eax, debug-location !18
141
142...
143