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1# RUN: llc %s -run-pass=machine-cp -o - | FileCheck %s --implicit-check-not=DBG_VALUE2 3## Ensure that when the destination register of a copy instruction is used by a4## DBG_VALUE/DBG_VALUE_LIST, and then that instruction is deleted during copy5## propagation, the debug use is updated to the source register.6##7## Do the same for DBG_PHI instructions.8 9# CHECK: ![[VAR_V:[0-9]+]] = !DILocalVariable(name: "v"10# CHECK-LABEL: body:11 12# CHECK: DBG_PHI $r0, 113# CHECK: DBG_VALUE $r0, $noreg, ![[VAR_V]], !DIExpression()14# CHECK: DBG_VALUE_LIST ![[VAR_V]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_constu, 4, DW_OP_mul, DW_OP_plus, DW_OP_stack_value), $r0, 015 16--- |17 target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"18 target triple = "arm-unknown-linux-gnueabi"19 20 %struct.atomic_t.0.6.15.24.48.51.54.57 = type { i32 }21 %struct.mm_struct.2.8.17.26.50.53.56.59 = type { %struct.anon.1.7.16.25.49.52.55.58 }22 %struct.anon.1.7.16.25.49.52.55.58 = type { i32 }23 24 @dup_mm_err = external dso_local local_unnamed_addr global i32, align 4, !dbg !025 26 declare dso_local i32 @atomic_long_read(ptr) local_unnamed_addr #027 28 declare dso_local i32 @get_mm_counter(ptr, i32) local_unnamed_addr #029 30 define dso_local i32 @dup_mm(i1 %arg) local_unnamed_addr !dbg !16 {31 entry:32 %call = tail call i32 @kmem_cache_alloc(i32 0)33 br i1 %arg, label %cleanup, label %if.end34 35 if.end: ; preds = %entry36 %tobool1.not = icmp eq i32 undef, 037 br i1 %tobool1.not, label %if.end3, label %free_pt38 39 if.end3: ; preds = %if.end40 call void @llvm.dbg.value(metadata !DIArgList(i32 %call, i32 0), metadata !30, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_constu, 4, DW_OP_mul, DW_OP_plus, DW_OP_stack_value)), !dbg !4041 %0 = load volatile i32, ptr undef, align 442 br label %cleanup43 44 free_pt: ; preds = %if.end45 store i32 0, ptr undef, align 446 br label %cleanup47 48 cleanup: ; preds = %free_pt, %if.end3, %entry49 %retval.0 = phi i32 [ %call, %if.end3 ], [ 0, %entry ], [ 0, %free_pt ]50 ret i32 %retval.051 }52 53 declare dso_local i32 @kmem_cache_alloc(...) local_unnamed_addr54 55 declare void @llvm.dbg.label(metadata)56 57 declare void @llvm.dbg.value(metadata, metadata, metadata)58 59 !llvm.dbg.cu = !{!2}60 !llvm.module.flags = !{!14, !15}61 62 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())63 !1 = distinct !DIGlobalVariable(name: "dup_mm_err", scope: !2, file: !3, line: 5, type: !12, isLocal: false, isDefinition: true)64 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !9, globals: !13, splitDebugInlining: false, nameTableKind: None)65 !3 = !DIFile(filename: "machine-cp-updates-dbg-reg.ll", directory: "/")66 !4 = !{!5}67 !5 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !3, line: 4, baseType: !6, size: 32, elements: !7)68 !6 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)69 !7 = !{!8}70 !8 = !DIEnumerator(name: "MM_SHMEMPAGES", value: 0, isUnsigned: true)71 !9 = !{!10}72 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 32)73 !11 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !12)74 !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)75 !13 = !{!0}76 !14 = !{i32 2, !"Debug Info Version", i32 3}77 !15 = !{i32 1, !"min_enum_size", i32 4}78 !16 = distinct !DISubprogram(name: "dup_mm", scope: !3, file: !3, line: 14, type: !17, scopeLine: 14, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !19)79 !17 = !DISubroutineType(types: !18)80 !18 = !{!12}81 !19 = !{!20, !28, !29}82 !20 = !DILocalVariable(name: "mm", scope: !16, file: !3, line: 15, type: !21)83 !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !22, size: 32)84 !22 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "mm_struct", file: !3, line: 7, size: 32, elements: !23)85 !23 = !{!24}86 !24 = !DIDerivedType(tag: DW_TAG_member, scope: !22, file: !3, line: 8, baseType: !25, size: 32)87 !25 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !22, file: !3, line: 8, size: 32, elements: !26)88 !26 = !{!27}89 !27 = !DIDerivedType(tag: DW_TAG_member, name: "binfmt", scope: !25, file: !3, line: 9, baseType: !12, size: 32)90 !28 = !DILabel(scope: !16, name: "free_pt", file: !3, line: 22)91 !29 = !DILabel(scope: !16, name: "fail_nomem", file: !3, line: 24)92 !30 = !DILocalVariable(name: "v", arg: 1, scope: !31, file: !3, line: 6, type: !34)93 !31 = distinct !DISubprogram(name: "atomic_long_read", scope: !3, file: !3, line: 6, type: !32, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !39)94 !32 = !DISubroutineType(types: !33)95 !33 = !{!12, !34}96 !34 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !35, size: 32)97 !35 = !DIDerivedType(tag: DW_TAG_typedef, name: "atomic_t", file: !3, line: 3, baseType: !36)98 !36 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, size: 32, elements: !37)99 !37 = !{!38}100 !38 = !DIDerivedType(tag: DW_TAG_member, name: "counter", scope: !36, file: !3, line: 2, baseType: !12, size: 32)101 !39 = !{!30}102 !40 = !DILocation(line: 0, scope: !31, inlinedAt: !41)103 !41 = distinct !DILocation(line: 12, column: 3, scope: !42, inlinedAt: !48)104 !42 = distinct !DISubprogram(name: "get_mm_counter", scope: !3, file: !3, line: 11, type: !43, scopeLine: 11, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !45)105 !43 = !DISubroutineType(types: !44)106 !44 = !{!22, !21, !12}107 !45 = !{!46, !47}108 !46 = !DILocalVariable(name: "mm", arg: 1, scope: !42, file: !3, line: 11, type: !21)109 !47 = !DILocalVariable(name: "member", arg: 2, scope: !42, file: !3, line: 11, type: !12)110 !48 = distinct !DILocation(line: 20, column: 3, scope: !16)111 112...113---114name: dup_mm115alignment: 4116exposesReturnsTwice: false117legalized: false118regBankSelected: false119selected: false120failedISel: false121tracksRegLiveness: true122hasWinCFI: false123registers: []124liveins: []125frameInfo:126 isFrameAddressTaken: false127 isReturnAddressTaken: false128 hasStackMap: false129 hasPatchPoint: false130 stackSize: 8131 offsetAdjustment: 0132 maxAlignment: 4133 adjustsStack: true134 hasCalls: true135 stackProtector: ''136 maxCallFrameSize: 0137 cvBytesOfCalleeSavedRegisters: 0138 hasOpaqueSPAdjustment: false139 hasVAStart: false140 hasMustTailInVarArgFunc: false141 hasTailCall: false142 localFrameSize: 0143 savePoint: []144 restorePoint: []145fixedStack: []146stack:147 - { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,148 stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,149 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }150 - { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,151 stack-id: default, callee-saved-register: '$r4', callee-saved-restored: true,152 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }153callSites: []154debugValueSubstitutions: []155constants: []156machineFunctionInfo: {}157body: |158 bb.0.entry:159 successors: %bb.4(0x40000000), %bb.1(0x40000000)160 liveins: $r4, $lr161 162 $sp = frame-setup STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r4, killed $lr163 frame-setup CFI_INSTRUCTION def_cfa_offset 8164 frame-setup CFI_INSTRUCTION offset $lr, -4165 frame-setup CFI_INSTRUCTION offset $r4, -8166 renamable $r4 = MOVi 0, 14 /* CC::al */, $noreg, $noreg167 $r0 = MOVi 0, 14 /* CC::al */, $noreg, $noreg168 BL @kmem_cache_alloc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit $r0, implicit-def $sp, implicit-def $r0169 CMPri renamable $r4, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr170 Bcc %bb.4, 1 /* CC::ne */, killed $cpsr171 172 bb.1.if.end:173 successors: %bb.2(0x30000000), %bb.3(0x50000000)174 liveins: $r0175 176 renamable $r4 = MOVi 0, 14 /* CC::al */, $noreg, $noreg177 CMPri renamable $r4, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr178 Bcc %bb.3, 1 /* CC::ne */, killed $cpsr179 180 bb.2.if.end3:181 liveins: $r0182 183 dead renamable $r1 = LDRi12 undef renamable $r0, 0, 14 /* CC::al */, $noreg :: (volatile load (s32) from `ptr undef`)184 renamable $r4 = COPY killed renamable $r0185 DBG_PHI $r4, 1186 DBG_VALUE $r4, $noreg, !30, !DIExpression(), debug-location !40187 DBG_VALUE_LIST !30, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_constu, 4, DW_OP_mul, DW_OP_plus, DW_OP_stack_value), $r4, 0, debug-location !40188 $r0 = COPY killed renamable $r4189 $sp = frame-destroy LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $pc, implicit $r0190 191 bb.3.free_pt:192 successors: %bb.4(0x80000000)193 liveins: $r4194 195 STRi12 renamable $r4, undef renamable $r0, 0, 14 /* CC::al */, $noreg :: (store (s32) into `ptr undef`)196 197 bb.4.cleanup:198 liveins: $r4199 200 $r0 = COPY killed renamable $r4201 $sp = frame-destroy LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $pc, implicit $r0202 203...204