1 # RUN: llc -mtriple thumbv7 -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 %ITSTATE<imp-def,dead>
36 ; CHECK: * DBG_VALUE %R1, %noreg, !"u"
37 ; CHECK-NOT: * DBG_VALUE %R1<kill>, %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: 1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
54 !1 = !DIFile(filename: "<stdin>", directory: "/Users/compnerd/Source/llvm")
57 !4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 9, type: !5, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true, variables: !17)
58 !5 = !DISubroutineType(types: !6)
59 !6 = !{!7, !8, !11, !12, !16}
60 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
61 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32, align: 32)
62 !9 = !DIDerivedType(tag: DW_TAG_typedef, name: "s", file: !1, line: 5, baseType: !10)
63 !10 = !DICompositeType(tag: DW_TAG_structure_type, name: "s", file: !1, line: 5, flags: DIFlagFwdDecl)
64 !11 = !DIBasicType(name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
65 !12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 32, align: 32)
66 !13 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !14)
67 !14 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint8_t", file: !1, line: 2, baseType: !15)
68 !15 = !DIBasicType(name: "unsigned char", size: 8, align: 8, encoding: DW_ATE_unsigned_char)
69 !16 = !DIDerivedType(tag: DW_TAG_typedef, name: "size_t", file: !1, line: 3, baseType: !11)
70 !17 = !{!18, !19, !20, !21}
71 !18 = !DILocalVariable(name: "s", arg: 1, scope: !4, file: !1, line: 9, type: !8)
72 !19 = !DILocalVariable(name: "u", arg: 2, scope: !4, file: !1, line: 9, type: !11)
73 !20 = !DILocalVariable(name: "b", arg: 3, scope: !4, file: !1, line: 9, type: !12)
74 !21 = !DILocalVariable(name: "n", arg: 4, scope: !4, file: !1, line: 9, type: !16)
75 !22 = !{i32 2, !"Dwarf Version", i32 4}
76 !23 = !{i32 2, !"Debug Info Version", i32 3}
77 !24 = !{i32 1, !"wchar_size", i32 4}
78 !25 = !{i32 1, !"min_enum_size", i32 4}
79 !26 = !{!"clang version 3.7.0 (llvm/trunk 237059)"}
81 !28 = !DILocation(line: 9, scope: !4)
82 !29 = !DILocation(line: 10, scope: !30)
83 !30 = distinct !DILexicalBlock(scope: !4, file: !1, line: 10)
84 !31 = !DILocation(line: 10, scope: !4)
85 !32 = !DILocation(line: 13, scope: !4)
86 !33 = !DILocation(line: 14, scope: !4)
87 !34 = !DILocation(line: 15, scope: !4)
93 exposesReturnsTwice: false
96 tracksRegLiveness: true
97 tracksSubRegLiveness: false
102 calleeSavedRegisters: [ '%lr', '%d8', '%d9', '%d10', '%d11', '%d12', '%d13',
103 '%d14', '%d15', '%q4', '%q5', '%q6', '%q7', '%r4',
104 '%r5', '%r6', '%r7', '%r8', '%r9', '%r10', '%r11',
105 '%s16', '%s17', '%s18', '%s19', '%s20', '%s21',
106 '%s22', '%s23', '%s24', '%s25', '%s26', '%s27',
107 '%s28', '%s29', '%s30', '%s31', '%d8_d10', '%d9_d11',
108 '%d10_d12', '%d11_d13', '%d12_d14', '%d13_d15',
109 '%q4_q5', '%q5_q6', '%q6_q7', '%q4_q5_q6_q7', '%r4_r5',
110 '%r6_r7', '%r8_r9', '%r10_r11', '%d8_d9_d10', '%d9_d10_d11',
111 '%d10_d11_d12', '%d11_d12_d13', '%d12_d13_d14',
112 '%d13_d14_d15', '%d8_d10_d12', '%d9_d11_d13', '%d10_d12_d14',
113 '%d11_d13_d15', '%d8_d10_d12_d14', '%d9_d11_d13_d15',
114 '%d9_d10', '%d11_d12', '%d13_d14', '%d9_d10_d11_d12',
117 isFrameAddressTaken: false
118 isReturnAddressTaken: false
127 hasOpaqueSPAdjustment: false
129 hasMustTailInVarArgFunc: false
131 - { id: 0, type: spill-slot, offset: -4, size: 4, alignment: 4, callee-saved-register: '%lr' }
132 - { id: 1, type: spill-slot, offset: -8, size: 4, alignment: 4, callee-saved-register: '%r7' }
135 liveins: %r0, %r2, %r3, %lr, %r7
137 DBG_VALUE debug-use %r0, debug-use _, !18, !27, debug-location !28
138 DBG_VALUE debug-use %r1, debug-use _, !19, !27, debug-location !28
139 DBG_VALUE debug-use %r2, debug-use _, !20, !27, debug-location !28
140 DBG_VALUE debug-use %r3, debug-use _, !21, !27, debug-location !28
141 t2CMPri %r3, 4, 14, _, implicit-def %cpsr, debug-location !31
142 DBG_VALUE debug-use %r1, debug-use _, !19, !27, debug-location !28
143 %r0 = t2MOVi -1, 3, %cpsr, _, implicit undef %r0
144 DBG_VALUE debug-use %r1, debug-use _, !19, !27, debug-location !28
145 tBX_RET 3, %cpsr, implicit %r0, debug-location !34
146 %sp = frame-setup t2STMDB_UPD %sp, 14, _, killed %r7, killed %lr
147 frame-setup CFI_INSTRUCTION .cfi_def_cfa_offset 8
148 frame-setup CFI_INSTRUCTION .cfi_offset %lr, -4
149 frame-setup CFI_INSTRUCTION .cfi_offset %r7, -8
150 DBG_VALUE debug-use %r0, debug-use _, !18, !27, debug-location !28
151 DBG_VALUE debug-use %r1, debug-use _, !19, !27, debug-location !28
152 DBG_VALUE debug-use %r2, debug-use _, !20, !27, debug-location !28
153 DBG_VALUE debug-use %r3, debug-use _, !21, !27, debug-location !28
154 %r1 = tMOVr killed %r2, 14, _, debug-location !32
155 %r2 = tMOVr killed %r3, 14, _, debug-location !32
156 tBL 14, _, @g, csr_aapcs, implicit-def dead %lr, implicit %sp, implicit %r0, implicit %r1, implicit %r2, implicit-def %sp, debug-location !32
157 %r0 = t2MOVi 0, 14, _, _
158 %sp = t2LDMIA_RET %sp, 14, _, def %r7, def %pc, implicit %r0