1# RUN: llc -mtriple thumbv7 -verify-machineinstrs -start-after if-converter -print-before post-RA-sched -print-after post-RA-sched %s -o /dev/null 2>&1 | FileCheck %s
2--- |
3  ; ModuleID = '/Volumes/Data/llvm/test/CodeGen/ARM/sched-it-debug-nodes.ll'
4  target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
5  target triple = "thumbv7"
6
7  %struct.s = type opaque
8
9  ; Function Attrs: nounwind
10  define arm_aapcscc i32 @f(%struct.s* %s, i32 %u, i8* %b, i32 %n) #0 !dbg !4 {
11  entry:
12    tail call void @llvm.dbg.value(metadata %struct.s* %s, i64 0, metadata !18, metadata !27), !dbg !28
13    tail call void @llvm.dbg.value(metadata i32 %u, i64 0, metadata !19, metadata !27), !dbg !28
14    tail call void @llvm.dbg.value(metadata i8* %b, i64 0, metadata !20, metadata !27), !dbg !28
15    tail call void @llvm.dbg.value(metadata i32 %n, i64 0, metadata !21, metadata !27), !dbg !28
16    %cmp = icmp ult i32 %n, 4, !dbg !29
17    br i1 %cmp, label %return, label %if.end, !dbg !31
18
19  if.end:                                           ; preds = %entry
20    tail call arm_aapcscc void @g(%struct.s* %s, i8* %b, i32 %n) #3, !dbg !32
21    br label %return, !dbg !33
22
23  return:                                           ; preds = %if.end, %entry
24    %retval.0 = phi i32 [ 0, %if.end ], [ -1, %entry ]
25    ret i32 %retval.0, !dbg !34
26  }
27
28  ; NOTE: This is checking that the register in the DEBUG_VALUE node is not
29  ; accidentally being marked as KILL.  The DBG_VALUE node gets introduced in
30  ; If-Conversion, and gets bundled into the IT block.  The Post RA Scheduler
31  ; attempts to schedule the Machine Instr, and tries to tag the register in the
32  ; debug value as KILL'ed, resulting in a DEBUG_VALUE node changing codegen!  (or
33  ; hopefully, triggering an assert).
34
35  ; CHECK: BUNDLE implicit-def dead $itstate{{.*}} {
36  ; CHECK: DBG_VALUE debug-use $r1, debug-use $noreg, !"u"
37  ; CHECK-NOT: DBG_VALUE killed $r1, $noreg, !"u"
38
39  declare arm_aapcscc void @g(%struct.s*, i8*, i32) #1
40
41  ; Function Attrs: nounwind readnone
42  declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
43
44  attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
45  attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
46  attributes #2 = { nounwind readnone }
47  attributes #3 = { nounwind }
48
49  !llvm.dbg.cu = !{!0}
50  !llvm.module.flags = !{!22, !23, !24, !25}
51  !llvm.ident = !{!26}
52
53  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.7.0  (llvm/trunk 237059)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
54  !1 = !DIFile(filename: "<stdin>", directory: "/Users/compnerd/Source/llvm")
55  !2 = !{}
56  !4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 9, type: !5, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !17)
57  !5 = !DISubroutineType(types: !6)
58  !6 = !{!7, !8, !11, !12, !16}
59  !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
60  !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32, align: 32)
61  !9 = !DIDerivedType(tag: DW_TAG_typedef, name: "s", file: !1, line: 5, baseType: !10)
62  !10 = !DICompositeType(tag: DW_TAG_structure_type, name: "s", file: !1, line: 5, flags: DIFlagFwdDecl)
63  !11 = !DIBasicType(name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
64  !12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 32, align: 32)
65  !13 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !14)
66  !14 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint8_t", file: !1, line: 2, baseType: !15)
67  !15 = !DIBasicType(name: "unsigned char", size: 8, align: 8, encoding: DW_ATE_unsigned_char)
68  !16 = !DIDerivedType(tag: DW_TAG_typedef, name: "size_t", file: !1, line: 3, baseType: !11)
69  !17 = !{!18, !19, !20, !21}
70  !18 = !DILocalVariable(name: "s", arg: 1, scope: !4, file: !1, line: 9, type: !8)
71  !19 = !DILocalVariable(name: "u", arg: 2, scope: !4, file: !1, line: 9, type: !11)
72  !20 = !DILocalVariable(name: "b", arg: 3, scope: !4, file: !1, line: 9, type: !12)
73  !21 = !DILocalVariable(name: "n", arg: 4, scope: !4, file: !1, line: 9, type: !16)
74  !22 = !{i32 2, !"Dwarf Version", i32 4}
75  !23 = !{i32 2, !"Debug Info Version", i32 3}
76  !24 = !{i32 1, !"wchar_size", i32 4}
77  !25 = !{i32 1, !"min_enum_size", i32 4}
78  !26 = !{!"clang version 3.7.0  (llvm/trunk 237059)"}
79  !27 = !DIExpression()
80  !28 = !DILocation(line: 9, scope: !4)
81  !29 = !DILocation(line: 10, scope: !30)
82  !30 = distinct !DILexicalBlock(scope: !4, file: !1, line: 10)
83  !31 = !DILocation(line: 10, scope: !4)
84  !32 = !DILocation(line: 13, scope: !4)
85  !33 = !DILocation(line: 14, scope: !4)
86  !34 = !DILocation(line: 15, scope: !4)
87
88...
89---
90name:            f
91alignment:       1
92exposesReturnsTwice: false
93tracksRegLiveness: true
94liveins:
95  - { reg: '$r0' }
96  - { reg: '$r1' }
97  - { reg: '$r2' }
98  - { reg: '$r3' }
99calleeSavedRegisters: [ '$lr', '$d8', '$d9', '$d10', '$d11', '$d12', '$d13',
100                        '$d14', '$d15', '$q4', '$q5', '$q6', '$q7', '$r4',
101                        '$r5', '$r6', '$r7', '$r8', '$r9', '$r10', '$r11',
102                        '$s16', '$s17', '$s18', '$s19', '$s20', '$s21',
103                        '$s22', '$s23', '$s24', '$s25', '$s26', '$s27',
104                        '$s28', '$s29', '$s30', '$s31', '$d8_d10', '$d9_d11',
105                        '$d10_d12', '$d11_d13', '$d12_d14', '$d13_d15',
106                        '$q4_q5', '$q5_q6', '$q6_q7', '$q4_q5_q6_q7', '$r4_r5',
107                        '$r6_r7', '$r8_r9', '$r10_r11', '$d8_d9_d10', '$d9_d10_d11',
108                        '$d10_d11_d12', '$d11_d12_d13', '$d12_d13_d14',
109                        '$d13_d14_d15', '$d8_d10_d12', '$d9_d11_d13', '$d10_d12_d14',
110                        '$d11_d13_d15', '$d8_d10_d12_d14', '$d9_d11_d13_d15',
111                        '$d9_d10', '$d11_d12', '$d13_d14', '$d9_d10_d11_d12',
112                        '$d11_d12_d13_d14' ]
113frameInfo:
114  isFrameAddressTaken: false
115  isReturnAddressTaken: false
116  hasStackMap:     false
117  hasPatchPoint:   false
118  stackSize:       8
119  offsetAdjustment: 0
120  maxAlignment:    4
121  adjustsStack:    true
122  hasCalls:        true
123  maxCallFrameSize: 0
124  hasOpaqueSPAdjustment: false
125  hasVAStart:      false
126  hasMustTailInVarArgFunc: false
127stack:
128  - { id: 0, type: spill-slot, offset: -4, size: 4, alignment: 4, callee-saved-register: '$lr', callee-saved-restored: false }
129  - { id: 1, type: spill-slot, offset: -8, size: 4, alignment: 4, callee-saved-register: '$r7' }
130body:             |
131  bb.0.entry:
132    liveins: $r0, $r1, $r2, $r3, $lr, $r7
133
134    DBG_VALUE debug-use $r0, debug-use $noreg, !18, !27, debug-location !28
135    DBG_VALUE debug-use $r1, debug-use $noreg, !19, !27, debug-location !28
136    DBG_VALUE debug-use $r2, debug-use $noreg, !20, !27, debug-location !28
137    DBG_VALUE debug-use $r3, debug-use $noreg, !21, !27, debug-location !28
138    t2CMPri $r3, 4, 14, $noreg, implicit-def $cpsr, debug-location !31
139    DBG_VALUE debug-use $r1, debug-use $noreg, !19, !27, debug-location !28
140    $r0 = t2MOVi -1, 3, $cpsr, $noreg, implicit undef $r0
141    DBG_VALUE debug-use $r1, debug-use $noreg, !19, !27, debug-location !28
142    tBX_RET 3, $cpsr, implicit $r0, debug-location !34
143    $sp = frame-setup t2STMDB_UPD $sp, 14, $noreg, killed $r7, killed $lr
144    frame-setup CFI_INSTRUCTION def_cfa_offset 8
145    frame-setup CFI_INSTRUCTION offset $lr, -4
146    frame-setup CFI_INSTRUCTION offset $r7, -8
147    DBG_VALUE debug-use $r0, debug-use $noreg, !18, !27, debug-location !28
148    DBG_VALUE debug-use $r1, debug-use $noreg, !19, !27, debug-location !28
149    DBG_VALUE debug-use $r2, debug-use $noreg, !20, !27, debug-location !28
150    DBG_VALUE debug-use $r3, debug-use $noreg, !21, !27, debug-location !28
151    $r1 = tMOVr killed $r2, 14, $noreg, debug-location !32
152    $r2 = tMOVr killed $r3, 14, $noreg, debug-location !32
153    tBL 14, $noreg, @g, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit $r0, implicit $r1, implicit $r2, implicit-def $sp, debug-location !32
154    $r0 = t2MOVi 0, 14, $noreg, $noreg
155    $sp = t2LDMIA_RET $sp, 14, $noreg, def $r7, def $pc, implicit $r0
156
157...
158