maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/DebugInfo/Generic/virtual-index.ll

71 lines
3.6 KiB
LLVM
Raw Normal View History

DebugInfo: Add ability to not emit DW_AT_vtable_elem_location for virtual functions. A virtual index of -1u indicates that the subprogram's virtual index is unrepresentable (for example, when using the relative vtable ABI), so do not emit a DW_AT_vtable_elem_location attribute for it. Differential Revision: http://reviews.llvm.org/D18236 llvm-svn: 263765
2016-03-18 07:58:03 +08:00
; REQUIRES: object-emission
; RUN: %llc_dwarf -O0 -filetype=obj < %s > %t
llvm-dwarfdump: Make -brief the default and add a -verbose option instead. Differential Revision: https://reviews.llvm.org/D37717 llvm-svn: 312972
2017-09-12 07:05:20 +08:00
; RUN: llvm-dwarfdump -v %t | FileCheck %s
DebugInfo: Add ability to not emit DW_AT_vtable_elem_location for virtual functions. A virtual index of -1u indicates that the subprogram's virtual index is unrepresentable (for example, when using the relative vtable ABI), so do not emit a DW_AT_vtable_elem_location attribute for it. Differential Revision: http://reviews.llvm.org/D18236 llvm-svn: 263765
2016-03-18 07:58:03 +08:00
; Generated from the following C++ source code:
;
; struct A {
; virtual void f();
; virtual void g();
; };
;
; void A::f() {}
; void A::g() {}
;
; and manually edited to set virtualIndex attribute on the A::g subprogram to
; 4294967295.
; CHECK: DW_TAG_subprogram [
Update testcase since llvm-dwarfdump got more accurate in r355148. llvm-svn: 355150
2019-03-01 06:26:00 +08:00
; CHECK: DW_AT_vtable_elem_location [DW_FORM_exprloc] (DW_OP_constu 0x0)
DebugInfo: Add ability to not emit DW_AT_vtable_elem_location for virtual functions. A virtual index of -1u indicates that the subprogram's virtual index is unrepresentable (for example, when using the relative vtable ABI), so do not emit a DW_AT_vtable_elem_location attribute for it. Differential Revision: http://reviews.llvm.org/D18236 llvm-svn: 263765
2016-03-18 07:58:03 +08:00
; CHECK: DW_TAG_subprogram [
; CHECK-NOT: DW_AT_vtable_elem_location
%struct.A = type { i32 (...)** }
@_ZTV1A = unnamed_addr constant [4 x i8*] [i8* null, i8* null, i8* bitcast (void (%struct.A*)* @_ZN1A1fEv to i8*), i8* bitcast (void (%struct.A*)* @_ZN1A1gEv to i8*)], align 8
define void @_ZN1A1fEv(%struct.A* %this) unnamed_addr !dbg !18 {
ret void
}
define void @_ZN1A1gEv(%struct.A* %this) unnamed_addr !dbg !19 {
ret void
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!20, !21}
!llvm.ident = !{!22}
[PR27284] Reverse the ownership between DICompileUnit and DISubprogram. Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> llvm-svn: 266446
2016-04-15 23:57:41 +08:00
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
DebugInfo: Add ability to not emit DW_AT_vtable_elem_location for virtual functions. A virtual index of -1u indicates that the subprogram's virtual index is unrepresentable (for example, when using the relative vtable ABI), so do not emit a DW_AT_vtable_elem_location attribute for it. Differential Revision: http://reviews.llvm.org/D18236 llvm-svn: 263765
2016-03-18 07:58:03 +08:00
!1 = !DIFile(filename: "x", directory: "x")
!2 = !{}
!3 = !{!4}
DebugInfo: Remove MDString-based type references Eliminate DITypeIdentifierMap and make DITypeRef a thin wrapper around DIType*. It is no longer legal to refer to a DICompositeType by its 'identifier:', and DIBuilder no longer retains all types with an 'identifier:' automatically. Aside from the bitcode upgrade, this is mainly removing logic to resolve an MDString-based reference to an actualy DIType. The commits leading up to this have made the implicit type map in DICompileUnit's 'retainedTypes:' field superfluous. This does not remove DITypeRef, DIScopeRef, DINodeRef, and DITypeRefArray, or stop using them in DI-related metadata. Although as of this commit they aren't serving a useful purpose, there are patchces under review to reuse them for CodeView support. The tests in LLVM were updated with deref-typerefs.sh, which is attached to the thread "[RFC] Lazy-loading of debug info metadata": http://lists.llvm.org/pipermail/llvm-dev/2016-April/098318.html llvm-svn: 267296
2016-04-24 05:08:00 +08:00
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "A", file: !1, line: 1, size: 64, align: 64, elements: !5, vtableHolder: !4, identifier: "_ZTS1A")
DebugInfo: Add ability to not emit DW_AT_vtable_elem_location for virtual functions. A virtual index of -1u indicates that the subprogram's virtual index is unrepresentable (for example, when using the relative vtable ABI), so do not emit a DW_AT_vtable_elem_location attribute for it. Differential Revision: http://reviews.llvm.org/D18236 llvm-svn: 263765
2016-03-18 07:58:03 +08:00
!5 = !{!6, !12, !16}
!6 = !DIDerivedType(tag: DW_TAG_member, name: "_vptr$A", scope: !1, file: !1, baseType: !7, size: 64, flags: DIFlagArtificial)
!7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64)
!8 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "__vtbl_ptr_type", baseType: !9, size: 64)
!9 = !DISubroutineType(types: !10)
!10 = !{!11}
!11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
DebugInfo: Remove MDString-based type references Eliminate DITypeIdentifierMap and make DITypeRef a thin wrapper around DIType*. It is no longer legal to refer to a DICompositeType by its 'identifier:', and DIBuilder no longer retains all types with an 'identifier:' automatically. Aside from the bitcode upgrade, this is mainly removing logic to resolve an MDString-based reference to an actualy DIType. The commits leading up to this have made the implicit type map in DICompileUnit's 'retainedTypes:' field superfluous. This does not remove DITypeRef, DIScopeRef, DINodeRef, and DITypeRefArray, or stop using them in DI-related metadata. Although as of this commit they aren't serving a useful purpose, there are patchces under review to reuse them for CodeView support. The tests in LLVM were updated with deref-typerefs.sh, which is attached to the thread "[RFC] Lazy-loading of debug info metadata": http://lists.llvm.org/pipermail/llvm-dev/2016-April/098318.html llvm-svn: 267296
2016-04-24 05:08:00 +08:00
!12 = !DISubprogram(name: "f", linkageName: "_ZN1A1fEv", scope: !4, file: !1, line: 2, type: !13, isLocal: false, isDefinition: false, scopeLine: 2, containingType: !4, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 0, flags: DIFlagPrototyped, isOptimized: false)
DebugInfo: Add ability to not emit DW_AT_vtable_elem_location for virtual functions. A virtual index of -1u indicates that the subprogram's virtual index is unrepresentable (for example, when using the relative vtable ABI), so do not emit a DW_AT_vtable_elem_location attribute for it. Differential Revision: http://reviews.llvm.org/D18236 llvm-svn: 263765
2016-03-18 07:58:03 +08:00
!13 = !DISubroutineType(types: !14)
!14 = !{null, !15}
DebugInfo: Remove MDString-based type references Eliminate DITypeIdentifierMap and make DITypeRef a thin wrapper around DIType*. It is no longer legal to refer to a DICompositeType by its 'identifier:', and DIBuilder no longer retains all types with an 'identifier:' automatically. Aside from the bitcode upgrade, this is mainly removing logic to resolve an MDString-based reference to an actualy DIType. The commits leading up to this have made the implicit type map in DICompileUnit's 'retainedTypes:' field superfluous. This does not remove DITypeRef, DIScopeRef, DINodeRef, and DITypeRefArray, or stop using them in DI-related metadata. Although as of this commit they aren't serving a useful purpose, there are patchces under review to reuse them for CodeView support. The tests in LLVM were updated with deref-typerefs.sh, which is attached to the thread "[RFC] Lazy-loading of debug info metadata": http://lists.llvm.org/pipermail/llvm-dev/2016-April/098318.html llvm-svn: 267296
2016-04-24 05:08:00 +08:00
!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
!16 = !DISubprogram(name: "g", linkageName: "_ZN1A1gEv", scope: !4, file: !1, line: 3, type: !13, isLocal: false, isDefinition: false, scopeLine: 3, containingType: !4, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 4294967295, flags: DIFlagPrototyped, isOptimized: false)
[DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
2018-05-09 10:40:45 +08:00
!18 = distinct !DISubprogram(name: "f", linkageName: "_ZN1A1fEv", scope: !4, file: !1, line: 6, type: !13, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, declaration: !12, retainedNodes: !2)
!19 = distinct !DISubprogram(name: "g", linkageName: "_ZN1A1gEv", scope: !4, file: !1, line: 7, type: !13, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: false, unit: !0, declaration: !16, retainedNodes: !2)
DebugInfo: Add ability to not emit DW_AT_vtable_elem_location for virtual functions. A virtual index of -1u indicates that the subprogram's virtual index is unrepresentable (for example, when using the relative vtable ABI), so do not emit a DW_AT_vtable_elem_location attribute for it. Differential Revision: http://reviews.llvm.org/D18236 llvm-svn: 263765
2016-03-18 07:58:03 +08:00
!20 = !{i32 2, !"Dwarf Version", i32 4}
!21 = !{i32 2, !"Debug Info Version", i32 3}
!22 = !{!"clang version 3.9.0 (trunk 263469) (llvm/trunk 263156)"}
!23 = !DILocalVariable(name: "this", arg: 1, scope: !18, type: !24, flags: DIFlagArtificial | DIFlagObjectPointer)
DebugInfo: Remove MDString-based type references Eliminate DITypeIdentifierMap and make DITypeRef a thin wrapper around DIType*. It is no longer legal to refer to a DICompositeType by its 'identifier:', and DIBuilder no longer retains all types with an 'identifier:' automatically. Aside from the bitcode upgrade, this is mainly removing logic to resolve an MDString-based reference to an actualy DIType. The commits leading up to this have made the implicit type map in DICompileUnit's 'retainedTypes:' field superfluous. This does not remove DITypeRef, DIScopeRef, DINodeRef, and DITypeRefArray, or stop using them in DI-related metadata. Although as of this commit they aren't serving a useful purpose, there are patchces under review to reuse them for CodeView support. The tests in LLVM were updated with deref-typerefs.sh, which is attached to the thread "[RFC] Lazy-loading of debug info metadata": http://lists.llvm.org/pipermail/llvm-dev/2016-April/098318.html llvm-svn: 267296
2016-04-24 05:08:00 +08:00
!24 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64)
DebugInfo: Add ability to not emit DW_AT_vtable_elem_location for virtual functions. A virtual index of -1u indicates that the subprogram's virtual index is unrepresentable (for example, when using the relative vtable ABI), so do not emit a DW_AT_vtable_elem_location attribute for it. Differential Revision: http://reviews.llvm.org/D18236 llvm-svn: 263765
2016-03-18 07:58:03 +08:00
!25 = !DIExpression()
!26 = !DILocation(line: 0, scope: !18)
!27 = !DILocation(line: 6, column: 14, scope: !18)
!28 = !DILocalVariable(name: "this", arg: 1, scope: !19, type: !24, flags: DIFlagArtificial | DIFlagObjectPointer)
!29 = !DILocation(line: 0, scope: !19)
!30 = !DILocation(line: 7, column: 14, scope: !19)