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https://github.com/c64scene-ar/llvm-6502.git
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88e419d66e
Remove 'inlinedAt:' from MDLocalVariable. Besides saving some memory (variables with it seem to be single largest `Metadata` contributer to memory usage right now in -g -flto builds), this stops optimization and backend passes from having to change local variables. The 'inlinedAt:' field was used by the backend in two ways: 1. To tell the backend whether and into what a variable was inlined. 2. To create a unique id for each inlined variable. Instead, rely on the 'inlinedAt:' field of the intrinsic's `!dbg` attachment, and change the DWARF backend to use a typedef called `InlinedVariable` which is `std::pair<MDLocalVariable*, MDLocation*>`. This `DebugLoc` is already passed reliably through the backend (as verified by r234021). This commit removes the check from r234021, but I added a new check (that will survive) in r235048, and changed the `DIBuilder` API in r235041 to require a `!dbg` attachment whose 'scope:` is in the same `MDSubprogram` as the variable's. If this breaks your out-of-tree testcases, perhaps the script I used (mdlocalvariable-drop-inlinedat.sh) will help; I'll attach it to PR22778 in a moment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235050 91177308-0d34-0410-b5e6-96231b3b80d8
113 lines
6.4 KiB
LLVM
113 lines
6.4 KiB
LLVM
; struct A {
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; A();
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; virtual ~A();
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; };
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; struct B : A {
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; B();
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; virtual ~B();
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; };
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; B::B() {}
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; CHECK: __ZN1BC1Ev:
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; CHECK: .loc 1 [[@LINE-2]] 0 prologue_end
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; CHECK-NOT: .loc 1 0 0 prologue_end
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; The location of the prologue_end marker should not be affected by the presence
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; of CFI instructions.
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; RUN: llc -O0 -filetype=asm < %s | FileCheck %s
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; ModuleID = 'test1.cpp'
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64-apple-ios"
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%struct.B = type { %struct.A }
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%struct.A = type { i32 (...)** }
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@_ZTV1B = external unnamed_addr constant [4 x i8*]
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; Function Attrs: nounwind
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define %struct.B* @_ZN1BC2Ev(%struct.B* %this) unnamed_addr #0 align 2 {
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entry:
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tail call void @llvm.dbg.value(metadata %struct.B* %this, i64 0, metadata !30, metadata !38), !dbg !39
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%0 = getelementptr inbounds %struct.B, %struct.B* %this, i64 0, i32 0, !dbg !40
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%call = tail call %struct.A* @_ZN1AC2Ev(%struct.A* %0) #3, !dbg !40
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%1 = getelementptr inbounds %struct.B, %struct.B* %this, i64 0, i32 0, i32 0, !dbg !40
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store i32 (...)** bitcast (i8** getelementptr inbounds ([4 x i8*], [4 x i8*]* @_ZTV1B, i64 0, i64 2) to i32 (...)**), i32 (...)*** %1, align 8, !dbg !40, !tbaa !41
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ret %struct.B* %this, !dbg !40
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}
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declare %struct.A* @_ZN1AC2Ev(%struct.A*)
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; Function Attrs: nounwind
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define %struct.B* @_ZN1BC1Ev(%struct.B* %this) unnamed_addr #0 align 2 {
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entry:
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tail call void @llvm.dbg.value(metadata %struct.B* %this, i64 0, metadata !34, metadata !38), !dbg !44
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tail call void @llvm.dbg.value(metadata %struct.B* %this, i64 0, metadata !45, metadata !38) #3, !dbg !47
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%0 = getelementptr inbounds %struct.B, %struct.B* %this, i64 0, i32 0, !dbg !48
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%call.i = tail call %struct.A* @_ZN1AC2Ev(%struct.A* %0) #3, !dbg !48
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%1 = getelementptr inbounds %struct.B, %struct.B* %this, i64 0, i32 0, i32 0, !dbg !48
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store i32 (...)** bitcast (i8** getelementptr inbounds ([4 x i8*], [4 x i8*]* @_ZTV1B, i64 0, i64 2) to i32 (...)**), i32 (...)*** %1, align 8, !dbg !48, !tbaa !41
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ret %struct.B* %this, !dbg !46
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
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attributes #0 = { nounwind }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!35, !36}
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!llvm.ident = !{!37}
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!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (trunk 224279) (llvm/trunk 224283)", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !27, globals: !2, imports: !2)
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!1 = !MDFile(filename: "<stdin>", directory: "")
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!2 = !{}
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!3 = !{!4, !13}
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!4 = !MDCompositeType(tag: DW_TAG_structure_type, name: "B", line: 5, size: 64, align: 64, file: !5, elements: !6, vtableHolder: !"_ZTS1A", identifier: "_ZTS1B")
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!5 = !MDFile(filename: "test1.cpp", directory: "")
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!6 = !{!7, !8, !12}
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!7 = !MDDerivedType(tag: DW_TAG_inheritance, scope: !"_ZTS1B", baseType: !"_ZTS1A")
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!8 = !MDSubprogram(name: "B", line: 6, isLocal: false, isDefinition: false, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !5, scope: !"_ZTS1B", type: !9)
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!9 = !MDSubroutineType(types: !10)
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!10 = !{null, !11}
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!11 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1B")
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!12 = !MDSubprogram(name: "~B", line: 7, isLocal: false, isDefinition: false, virtuality: DW_VIRTUALITY_virtual, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 7, file: !5, scope: !"_ZTS1B", type: !9, containingType: !"_ZTS1B")
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!13 = !MDCompositeType(tag: DW_TAG_structure_type, name: "A", line: 1, size: 64, align: 64, file: !5, elements: !14, vtableHolder: !"_ZTS1A", identifier: "_ZTS1A")
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!14 = !{!15, !22, !26}
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!15 = !MDDerivedType(tag: DW_TAG_member, name: "_vptr$A", size: 64, flags: DIFlagArtificial, file: !5, scope: !16, baseType: !17)
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!16 = !MDFile(filename: "test1.cpp", directory: "")
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!17 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, baseType: !18)
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!18 = !MDDerivedType(tag: DW_TAG_pointer_type, name: "__vtbl_ptr_type", size: 64, baseType: !19)
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!19 = !MDSubroutineType(types: !20)
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!20 = !{!21}
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!21 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!22 = !MDSubprogram(name: "A", line: 2, isLocal: false, isDefinition: false, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 2, file: !5, scope: !"_ZTS1A", type: !23)
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!23 = !MDSubroutineType(types: !24)
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!24 = !{null, !25}
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!25 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1A")
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!26 = !MDSubprogram(name: "~A", line: 3, isLocal: false, isDefinition: false, virtuality: DW_VIRTUALITY_virtual, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 3, file: !5, scope: !"_ZTS1A", type: !23, containingType: !"_ZTS1A")
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!27 = !{!28, !32}
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!28 = !MDSubprogram(name: "B", linkageName: "_ZN1BC2Ev", line: 9, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 9, file: !5, scope: !"_ZTS1B", type: !9, function: %struct.B* (%struct.B*)* @_ZN1BC2Ev, declaration: !8, variables: !29)
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!29 = !{!30}
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!30 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !28, type: !31)
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!31 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1B")
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!32 = !MDSubprogram(name: "B", linkageName: "_ZN1BC1Ev", line: 9, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 9, file: !5, scope: !"_ZTS1B", type: !9, function: %struct.B* (%struct.B*)* @_ZN1BC1Ev, declaration: !8, variables: !33)
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!33 = !{!34}
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!34 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !32, type: !31)
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!35 = !{i32 2, !"Dwarf Version", i32 4}
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!36 = !{i32 2, !"Debug Info Version", i32 3}
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!37 = !{!"clang version 3.6.0 (trunk 224279) (llvm/trunk 224283)"}
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!38 = !MDExpression()
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!39 = !MDLocation(line: 0, scope: !28)
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!40 = !MDLocation(line: 9, scope: !28)
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!41 = !{!42, !42, i64 0}
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!42 = !{!"vtable pointer", !43, i64 0}
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!43 = !{!"Simple C/C++ TBAA"}
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!44 = !MDLocation(line: 0, scope: !32)
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!45 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !28, type: !31)
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!46 = !MDLocation(line: 9, scope: !32)
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!47 = !MDLocation(line: 0, scope: !28, inlinedAt: !46)
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!48 = !MDLocation(line: 9, scope: !28, inlinedAt: !46)
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