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https://github.com/c64scene-ar/llvm-6502.git
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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
170 lines
8.3 KiB
LLVM
170 lines
8.3 KiB
LLVM
; REQUIRES: object-emission
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; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
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; IR generated from clang -O0 with:
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; struct C {
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; ~C();
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; };
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; extern bool b;
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; void fun4() { b && (C(), 1); }
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; __attribute__((always_inline)) C::~C() { }
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; CHECK: DW_TAG_structure_type
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "C"
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "~C"
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_linkage_name {{.*}} "_ZN1CD1Ev"
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "this"
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "fun4"
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_TAG_inlined_subroutine
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_abstract_origin {{.*}} "_ZN1CD1Ev"
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_abstract_origin {{.*}} "this"
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; FIXME: D2 is actually inlined into D1 but doesn't show up here, possibly due
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; to there being no work in D2 (calling another member function from the dtor
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; causes D2 to show up, calling a free function doesn't).
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; CHECK-NOT: DW_TAG
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; CHECK: NULL
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; CHECK-NOT: DW_TAG
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; CHECK: NULL
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%struct.C = type { i8 }
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@b = external global i8
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; Function Attrs: nounwind
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define void @_Z4fun4v() #0 {
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entry:
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%this.addr.i.i = alloca %struct.C*, align 8, !dbg !21
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%this.addr.i = alloca %struct.C*, align 8, !dbg !22
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%agg.tmp.ensured = alloca %struct.C, align 1
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%cleanup.cond = alloca i1
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%0 = load i8, i8* @b, align 1, !dbg !24
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%tobool = trunc i8 %0 to i1, !dbg !24
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store i1 false, i1* %cleanup.cond
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br i1 %tobool, label %land.rhs, label %land.end, !dbg !24
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land.rhs: ; preds = %entry
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store i1 true, i1* %cleanup.cond, !dbg !25
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br label %land.end
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land.end: ; preds = %land.rhs, %entry
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%1 = phi i1 [ false, %entry ], [ true, %land.rhs ]
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%cleanup.is_active = load i1, i1* %cleanup.cond, !dbg !27
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br i1 %cleanup.is_active, label %cleanup.action, label %cleanup.done, !dbg !27
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cleanup.action: ; preds = %land.end
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store %struct.C* %agg.tmp.ensured, %struct.C** %this.addr.i, align 8, !dbg !22
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call void @llvm.dbg.declare(metadata %struct.C** %this.addr.i, metadata !129, metadata !MDExpression()), !dbg !31
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%this1.i = load %struct.C*, %struct.C** %this.addr.i, !dbg !22
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store %struct.C* %this1.i, %struct.C** %this.addr.i.i, align 8, !dbg !21
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call void @llvm.dbg.declare(metadata %struct.C** %this.addr.i.i, metadata !132, metadata !MDExpression()), !dbg !33
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%this1.i.i = load %struct.C*, %struct.C** %this.addr.i.i, !dbg !21
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br label %cleanup.done, !dbg !22
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cleanup.done: ; preds = %cleanup.action, %land.end
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ret void, !dbg !34
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}
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; Function Attrs: alwaysinline nounwind
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define void @_ZN1CD1Ev(%struct.C* %this) unnamed_addr #1 align 2 {
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entry:
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%this.addr.i = alloca %struct.C*, align 8, !dbg !37
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%this.addr = alloca %struct.C*, align 8
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store %struct.C* %this, %struct.C** %this.addr, align 8
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call void @llvm.dbg.declare(metadata %struct.C** %this.addr, metadata !29, metadata !MDExpression()), !dbg !38
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%this1 = load %struct.C*, %struct.C** %this.addr
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store %struct.C* %this1, %struct.C** %this.addr.i, align 8, !dbg !37
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call void @llvm.dbg.declare(metadata %struct.C** %this.addr.i, metadata !232, metadata !MDExpression()), !dbg !39
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%this1.i = load %struct.C*, %struct.C** %this.addr.i, !dbg !37
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ret void, !dbg !37
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}
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; Function Attrs: alwaysinline nounwind
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define void @_ZN1CD2Ev(%struct.C* %this) unnamed_addr #1 align 2 {
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entry:
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%this.addr = alloca %struct.C*, align 8
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store %struct.C* %this, %struct.C** %this.addr, align 8
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call void @llvm.dbg.declare(metadata %struct.C** %this.addr, metadata !32, metadata !MDExpression()), !dbg !40
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%this1 = load %struct.C*, %struct.C** %this.addr
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ret void, !dbg !41
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
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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" }
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attributes #1 = { alwaysinline 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" }
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attributes #2 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!18, !19}
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!llvm.ident = !{!20}
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!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !11, globals: !2, imports: !2)
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!1 = !MDFile(filename: "<stdin>", directory: "/tmp/dbginfo")
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!2 = !{}
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!3 = !{!4}
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!4 = !MDCompositeType(tag: DW_TAG_structure_type, name: "C", line: 1, size: 8, align: 8, file: !5, elements: !6, identifier: "_ZTS1C")
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!5 = !MDFile(filename: "PR20038.cpp", directory: "/tmp/dbginfo")
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!6 = !{!7}
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!7 = !MDSubprogram(name: "~C", line: 2, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 2, file: !5, scope: !"_ZTS1C", type: !8)
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!8 = !MDSubroutineType(types: !9)
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!9 = !{null, !10}
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!10 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1C")
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!11 = !{!12, !16, !17}
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!12 = !MDSubprogram(name: "fun4", linkageName: "_Z4fun4v", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 5, file: !5, scope: !13, type: !14, function: void ()* @_Z4fun4v, variables: !2)
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!13 = !MDFile(filename: "PR20038.cpp", directory: "/tmp/dbginfo")
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!14 = !MDSubroutineType(types: !15)
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!15 = !{null}
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!16 = !MDSubprogram(name: "~C", linkageName: "_ZN1CD2Ev", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 6, file: !5, scope: !"_ZTS1C", type: !8, function: void (%struct.C*)* @_ZN1CD2Ev, declaration: !7, variables: !2)
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!17 = !MDSubprogram(name: "~C", linkageName: "_ZN1CD1Ev", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 6, file: !5, scope: !"_ZTS1C", type: !8, function: void (%struct.C*)* @_ZN1CD1Ev, declaration: !7, variables: !2)
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!18 = !{i32 2, !"Dwarf Version", i32 4}
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!19 = !{i32 2, !"Debug Info Version", i32 3}
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!20 = !{!"clang version 3.5.0 "}
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!21 = !MDLocation(line: 6, scope: !17, inlinedAt: !22)
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!22 = !MDLocation(line: 5, scope: !23)
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!23 = distinct !MDLexicalBlock(line: 5, column: 0, file: !5, scope: !12)
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!24 = !MDLocation(line: 5, scope: !12)
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!25 = !MDLocation(line: 5, scope: !26)
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!26 = distinct !MDLexicalBlock(line: 5, column: 0, file: !5, scope: !12)
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!27 = !MDLocation(line: 5, scope: !28)
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!28 = distinct !MDLexicalBlock(line: 5, column: 0, file: !5, scope: !12)
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!29 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !17, type: !30)
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!30 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1C")
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!31 = !MDLocation(line: 0, scope: !17, inlinedAt: !22)
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!32 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !16, type: !30)
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!33 = !MDLocation(line: 0, scope: !16, inlinedAt: !21)
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!129 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !17, type: !30)
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!132 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !16, type: !30)
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!232 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !16, type: !30)
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!34 = !MDLocation(line: 5, scope: !35)
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!35 = distinct !MDLexicalBlock(line: 5, column: 0, file: !5, scope: !36)
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!36 = distinct !MDLexicalBlock(line: 5, column: 0, file: !5, scope: !12)
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!37 = !MDLocation(line: 6, scope: !17)
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!38 = !MDLocation(line: 0, scope: !17)
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!39 = !MDLocation(line: 0, scope: !16, inlinedAt: !37)
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!40 = !MDLocation(line: 0, scope: !16)
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!41 = !MDLocation(line: 6, scope: !16)
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