| # RUN: llc %s -run-pass=machine-cp -o - | FileCheck %s --implicit-check-not=DBG_VALUE |
| |
| ## Ensure that when the destination register of a copy instruction is used by a |
| ## DBG_VALUE/DBG_VALUE_LIST, and then that instruction is deleted during copy |
| ## propagation, the debug use is updated to the source register. |
| ## |
| ## Do the same for DBG_PHI instructions. |
| |
| # CHECK: ![[VAR_V:[0-9]+]] = !DILocalVariable(name: "v" |
| # CHECK-LABEL: body: |
| |
| # CHECK: DBG_PHI $r0, 1 |
| # CHECK: DBG_VALUE $r0, $noreg, ![[VAR_V]], !DIExpression() |
| # 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 |
| |
| --- | |
| target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64" |
| target triple = "arm-unknown-linux-gnueabi" |
| |
| %struct.atomic_t.0.6.15.24.48.51.54.57 = type { i32 } |
| %struct.mm_struct.2.8.17.26.50.53.56.59 = type { %struct.anon.1.7.16.25.49.52.55.58 } |
| %struct.anon.1.7.16.25.49.52.55.58 = type { i32 } |
| |
| @dup_mm_err = external dso_local local_unnamed_addr global i32, align 4, !dbg !0 |
| |
| declare dso_local i32 @atomic_long_read(%struct.atomic_t.0.6.15.24.48.51.54.57*) local_unnamed_addr #0 |
| |
| declare dso_local i32 @get_mm_counter(%struct.mm_struct.2.8.17.26.50.53.56.59*, i32) local_unnamed_addr #0 |
| |
| define dso_local i32 @dup_mm() local_unnamed_addr !dbg !16 { |
| entry: |
| %call = tail call i32 bitcast (i32 (...)* @kmem_cache_alloc to i32 (i32)*)(i32 0) |
| br i1 undef, label %cleanup, label %if.end |
| |
| if.end: ; preds = %entry |
| %tobool1.not = icmp eq i32 undef, 0 |
| br i1 %tobool1.not, label %if.end3, label %free_pt |
| |
| if.end3: ; preds = %if.end |
| 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 |
| %0 = load volatile i32, i32* undef, align 4 |
| br label %cleanup |
| |
| free_pt: ; preds = %if.end |
| store i32 0, i32* undef, align 4 |
| br label %cleanup |
| |
| cleanup: ; preds = %free_pt, %if.end3, %entry |
| %retval.0 = phi i32 [ %call, %if.end3 ], [ 0, %entry ], [ 0, %free_pt ] |
| ret i32 %retval.0 |
| } |
| |
| declare dso_local i32 @kmem_cache_alloc(...) local_unnamed_addr |
| |
| declare void @llvm.dbg.label(metadata) |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!14, !15} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "dup_mm_err", scope: !2, file: !3, line: 5, type: !12, isLocal: false, isDefinition: true) |
| !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) |
| !3 = !DIFile(filename: "machine-cp-updates-dbg-reg.ll", directory: "/") |
| !4 = !{!5} |
| !5 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !3, line: 4, baseType: !6, size: 32, elements: !7) |
| !6 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) |
| !7 = !{!8} |
| !8 = !DIEnumerator(name: "MM_SHMEMPAGES", value: 0, isUnsigned: true) |
| !9 = !{!10} |
| !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 32) |
| !11 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !12) |
| !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !13 = !{!0} |
| !14 = !{i32 2, !"Debug Info Version", i32 3} |
| !15 = !{i32 1, !"min_enum_size", i32 4} |
| !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) |
| !17 = !DISubroutineType(types: !18) |
| !18 = !{!12} |
| !19 = !{!20, !28, !29} |
| !20 = !DILocalVariable(name: "mm", scope: !16, file: !3, line: 15, type: !21) |
| !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !22, size: 32) |
| !22 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "mm_struct", file: !3, line: 7, size: 32, elements: !23) |
| !23 = !{!24} |
| !24 = !DIDerivedType(tag: DW_TAG_member, scope: !22, file: !3, line: 8, baseType: !25, size: 32) |
| !25 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !22, file: !3, line: 8, size: 32, elements: !26) |
| !26 = !{!27} |
| !27 = !DIDerivedType(tag: DW_TAG_member, name: "binfmt", scope: !25, file: !3, line: 9, baseType: !12, size: 32) |
| !28 = !DILabel(scope: !16, name: "free_pt", file: !3, line: 22) |
| !29 = !DILabel(scope: !16, name: "fail_nomem", file: !3, line: 24) |
| !30 = !DILocalVariable(name: "v", arg: 1, scope: !31, file: !3, line: 6, type: !34) |
| !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) |
| !32 = !DISubroutineType(types: !33) |
| !33 = !{!12, !34} |
| !34 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !35, size: 32) |
| !35 = !DIDerivedType(tag: DW_TAG_typedef, name: "atomic_t", file: !3, line: 3, baseType: !36) |
| !36 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !3, line: 1, size: 32, elements: !37) |
| !37 = !{!38} |
| !38 = !DIDerivedType(tag: DW_TAG_member, name: "counter", scope: !36, file: !3, line: 2, baseType: !12, size: 32) |
| !39 = !{!30} |
| !40 = !DILocation(line: 0, scope: !31, inlinedAt: !41) |
| !41 = distinct !DILocation(line: 12, column: 3, scope: !42, inlinedAt: !48) |
| !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) |
| !43 = !DISubroutineType(types: !44) |
| !44 = !{!22, !21, !12} |
| !45 = !{!46, !47} |
| !46 = !DILocalVariable(name: "mm", arg: 1, scope: !42, file: !3, line: 11, type: !21) |
| !47 = !DILocalVariable(name: "member", arg: 2, scope: !42, file: !3, line: 11, type: !12) |
| !48 = distinct !DILocation(line: 20, column: 3, scope: !16) |
| |
| ... |
| --- |
| name: dup_mm |
| alignment: 4 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: false |
| registers: [] |
| liveins: [] |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 8 |
| offsetAdjustment: 0 |
| maxAlignment: 4 |
| adjustsStack: true |
| hasCalls: true |
| stackProtector: '' |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| hasTailCall: false |
| localFrameSize: 0 |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: [] |
| stack: |
| - { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '$r4', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| callSites: [] |
| debugValueSubstitutions: [] |
| constants: [] |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| successors: %bb.4(0x40000000), %bb.1(0x40000000) |
| liveins: $r4, $lr |
| |
| $sp = frame-setup STMDB_UPD $sp, 14 /* CC::al */, $noreg, killed $r4, killed $lr |
| frame-setup CFI_INSTRUCTION def_cfa_offset 8 |
| frame-setup CFI_INSTRUCTION offset $lr, -4 |
| frame-setup CFI_INSTRUCTION offset $r4, -8 |
| renamable $r4 = MOVi 0, 14 /* CC::al */, $noreg, $noreg |
| $r0 = MOVi 0, 14 /* CC::al */, $noreg, $noreg |
| BL @kmem_cache_alloc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit $r0, implicit-def $sp, implicit-def $r0 |
| CMPri renamable $r4, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| Bcc %bb.4, 1 /* CC::ne */, killed $cpsr |
| |
| bb.1.if.end: |
| successors: %bb.2(0x30000000), %bb.3(0x50000000) |
| liveins: $r0 |
| |
| renamable $r4 = MOVi 0, 14 /* CC::al */, $noreg, $noreg |
| CMPri renamable $r4, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| Bcc %bb.3, 1 /* CC::ne */, killed $cpsr |
| |
| bb.2.if.end3: |
| liveins: $r0 |
| |
| dead renamable $r1 = LDRi12 undef renamable $r0, 0, 14 /* CC::al */, $noreg :: (volatile load (s32) from `i32* undef`) |
| renamable $r4 = COPY killed renamable $r0 |
| DBG_PHI $r4, 1 |
| DBG_VALUE $r4, $noreg, !30, !DIExpression(), debug-location !40 |
| 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 |
| $r0 = COPY killed renamable $r4 |
| $sp = frame-destroy LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $pc, implicit $r0 |
| |
| bb.3.free_pt: |
| successors: %bb.4(0x80000000) |
| liveins: $r4 |
| |
| STRi12 renamable $r4, undef renamable $r0, 0, 14 /* CC::al */, $noreg :: (store (s32) into `i32* undef`) |
| |
| bb.4.cleanup: |
| liveins: $r4 |
| |
| $r0 = COPY killed renamable $r4 |
| $sp = frame-destroy LDMIA_RET $sp, 14 /* CC::al */, $noreg, def $r4, def $pc, implicit $r0 |
| |
| ... |