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
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"
7 %struct.s = type opaque
9 ; Function Attrs: nounwind
10 define arm_aapcscc i32 @f(%struct.s* %s, i32 %u, i8* %b, i32 %n) #0 !dbg !4 {
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
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
23 return: ; preds = %if.end, %entry
24 %retval.0 = phi i32 [ 0, %if.end ], [ -1, %entry ]
25 ret i32 %retval.0, !dbg !34
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).
35 ; CHECK: BUNDLE implicit-def dead $itstate{{.*}} {
36 ; CHECK: DBG_VALUE $r1, $noreg, !"u"
37 ; CHECK-NOT: DBG_VALUE killed $r1, $noreg, !"u"
39 declare arm_aapcscc void @g(%struct.s*, i8*, i32) #1
41 ; Function Attrs: nounwind readnone
42 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
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 }
50 !llvm.module.flags = !{!22, !23, !24, !25}
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")
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)"}
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)
92 exposesReturnsTwice: false
93 tracksRegLiveness: true
99 calleeSavedRegisters: [ '$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',
114 isFrameAddressTaken: false
115 isReturnAddressTaken: false
124 hasOpaqueSPAdjustment: false
126 hasMustTailInVarArgFunc: false
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' }
132 liveins: $r0, $r1, $r2, $r3, $lr, $r7
134 DBG_VALUE $r0, $noreg, !18, !27, debug-location !28
135 DBG_VALUE $r1, $noreg, !19, !27, debug-location !28
136 DBG_VALUE $r2, $noreg, !20, !27, debug-location !28
137 DBG_VALUE $r3, $noreg, !21, !27, debug-location !28
138 t2CMPri $r3, 4, 14, $noreg, implicit-def $cpsr, debug-location !31
139 DBG_VALUE $r1, $noreg, !19, !27, debug-location !28
140 $r0 = t2MOVi -1, 3, $cpsr, $noreg, implicit undef $r0
141 DBG_VALUE $r1, $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 $r0, $noreg, !18, !27, debug-location !28
148 DBG_VALUE $r1, $noreg, !19, !27, debug-location !28
149 DBG_VALUE $r2, $noreg, !20, !27, debug-location !28
150 DBG_VALUE $r3, $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