1# RUN: llc %s -run-pass=machine-cp -o - | FileCheck %s --implicit-check-not=DBG_VALUE 2 3## Ensure that when the destination register of a copy instruction is used by a 4## DBG_VALUE/DBG_VALUE_LIST, and then that instruction is deleted during copy 5## 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, 1 13# 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, 0 15 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 !0 25 26 declare dso_local i32 @atomic_long_read(ptr) local_unnamed_addr #0 27 28 declare dso_local i32 @get_mm_counter(ptr, i32) local_unnamed_addr #0 29 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.end 34 35 if.end: ; preds = %entry 36 %tobool1.not = icmp eq i32 undef, 0 37 br i1 %tobool1.not, label %if.end3, label %free_pt 38 39 if.end3: ; preds = %if.end 40 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 !40 41 %0 = load volatile i32, ptr undef, align 4 42 br label %cleanup 43 44 free_pt: ; preds = %if.end 45 store i32 0, ptr undef, align 4 46 br label %cleanup 47 48 cleanup: ; preds = %free_pt, %if.end3, %entry 49 %retval.0 = phi i32 [ %call, %if.end3 ], [ 0, %entry ], [ 0, %free_pt ] 50 ret i32 %retval.0 51 } 52 53 declare dso_local i32 @kmem_cache_alloc(...) local_unnamed_addr 54 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_mm 115alignment: 4 116exposesReturnsTwice: false 117legalized: false 118regBankSelected: false 119selected: false 120failedISel: false 121tracksRegLiveness: true 122hasWinCFI: false 123registers: [] 124liveins: [] 125frameInfo: 126 isFrameAddressTaken: false 127 isReturnAddressTaken: false 128 hasStackMap: false 129 hasPatchPoint: false 130 stackSize: 8 131 offsetAdjustment: 0 132 maxAlignment: 4 133 adjustsStack: true 134 hasCalls: true 135 stackProtector: '' 136 maxCallFrameSize: 0 137 cvBytesOfCalleeSavedRegisters: 0 138 hasOpaqueSPAdjustment: false 139 hasVAStart: false 140 hasMustTailInVarArgFunc: false 141 hasTailCall: false 142 localFrameSize: 0 143 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, $lr 161 162 $sp = frame-setup STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r4, killed $lr 163 frame-setup CFI_INSTRUCTION def_cfa_offset 8 164 frame-setup CFI_INSTRUCTION offset $lr, -4 165 frame-setup CFI_INSTRUCTION offset $r4, -8 166 renamable $r4 = MOVi 0, 14 /* CC::al */, $noreg, $noreg 167 $r0 = MOVi 0, 14 /* CC::al */, $noreg, $noreg 168 BL @kmem_cache_alloc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit $r0, implicit-def $sp, implicit-def $r0 169 CMPri renamable $r4, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr 170 Bcc %bb.4, 1 /* CC::ne */, killed $cpsr 171 172 bb.1.if.end: 173 successors: %bb.2(0x30000000), %bb.3(0x50000000) 174 liveins: $r0 175 176 renamable $r4 = MOVi 0, 14 /* CC::al */, $noreg, $noreg 177 CMPri renamable $r4, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr 178 Bcc %bb.3, 1 /* CC::ne */, killed $cpsr 179 180 bb.2.if.end3: 181 liveins: $r0 182 183 dead renamable $r1 = LDRi12 undef renamable $r0, 0, 14 /* CC::al */, $noreg :: (volatile load (s32) from `ptr undef`) 184 renamable $r4 = COPY killed renamable $r0 185 DBG_PHI $r4, 1 186 DBG_VALUE $r4, $noreg, !30, !DIExpression(), debug-location !40 187 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 !40 188 $r0 = COPY killed renamable $r4 189 $sp = frame-destroy LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $pc, implicit $r0 190 191 bb.3.free_pt: 192 successors: %bb.4(0x80000000) 193 liveins: $r4 194 195 STRi12 renamable $r4, undef renamable $r0, 0, 14 /* CC::al */, $noreg :: (store (s32) into `ptr undef`) 196 197 bb.4.cleanup: 198 liveins: $r4 199 200 $r0 = COPY killed renamable $r4 201 $sp = frame-destroy LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $pc, implicit $r0 202 203... 204