mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-21 20:12:56 +02:00
a2029fa58e
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
133 lines
5.4 KiB
LLVM
133 lines
5.4 KiB
LLVM
; RUN: %llc_dwarf -O0 -filetype=obj -dwarf-linkage-names=Abstract < %s | llvm-dwarfdump -v -debug-info - > %t
|
|
; RUN: FileCheck %s -check-prefix=ONENAME < %t
|
|
; RUN: FileCheck %s -check-prefix=REF < %t
|
|
; Verify tuning for SCE gets us Abstract only.
|
|
; RUN: %llc_dwarf -O0 -filetype=obj -debugger-tune=sce < %s | llvm-dwarfdump -v -debug-info - > %t
|
|
; RUN: FileCheck %s -check-prefix=ONENAME < %t
|
|
; RUN: FileCheck %s -check-prefix=REF < %t
|
|
; REQUIRES: object-emission
|
|
|
|
; Verify that the only linkage-name present is the abstract origin of the
|
|
; inlined subprogram.
|
|
|
|
; IR generated from clang -O0 with:
|
|
; void f1();
|
|
; __attribute__((always_inline)) void f2() {
|
|
; f1();
|
|
; }
|
|
; void f3() {
|
|
; f2();
|
|
; }
|
|
;
|
|
; struct F4 {
|
|
; __attribute__((always_inline)) void f5();
|
|
; };
|
|
; void F4::f5() {
|
|
; f1();
|
|
; }
|
|
; void f6() {
|
|
; F4::f5();
|
|
; }
|
|
|
|
; Show that the only linkage names are for the inlined functions,
|
|
; because those are the ones with an abstract origin.
|
|
; ONENAME-NOT: {{DW_AT(_MIPS)?_linkage_name}}
|
|
; ONENAME: {{DW_AT(_MIPS)?_linkage_name}} {{.*}} "_Z2f2v"
|
|
; ONENAME-NOT: {{DW_AT(_MIPS)?_linkage_name}}
|
|
; ONENAME: {{DW_AT(_MIPS)?_linkage_name}} {{.*}} "_ZN2F42f5Ev"
|
|
; ONENAME-NOT: {{DW_AT(_MIPS)?_linkage_name}}
|
|
|
|
; For f2() we see the definition pointing to an abstract origin DIE,
|
|
; which in turn is where the linkage_name is; and then there's
|
|
; an inlined_subroutine pointing back to the abstract origin.
|
|
; The order of these DIEs is not important of course, just the links.
|
|
; REF: DW_TAG_subprogram
|
|
; REF-NOT: {{DW_TAG|NULL}}
|
|
; REF: DW_AT_abstract_origin {{.*}} {[[F2:0x.*]]} "_Z2f2v"
|
|
; REF: [[F2]]: DW_TAG_subprogram
|
|
; REF-NEXT: linkage_name {{.*}} "_Z2f2v"
|
|
; REF: DW_TAG_inlined_subroutine
|
|
; REF-NOT: {{DW_TAG|NULL}}
|
|
; REF: DW_AT_abstract_origin {{.*}} {[[F2]]}
|
|
|
|
; For F4::f5(), first we see the in-class declaration,
|
|
; then the definition, abstract origin, and the inlined_subroutine.
|
|
; REF: DW_TAG_structure_type
|
|
; REF-NEXT: DW_AT_name {{.*}} "F4"
|
|
; REF-NOT: {{DW_TAG|NULL}}
|
|
; REF: [[F5_DECL:0x.*]]: DW_TAG_subprogram
|
|
; REF-NEXT: DW_AT_name {{.*}} "f5"
|
|
; REF: DW_TAG_subprogram
|
|
; REF-NOT: {{DW_TAG|NULL}}
|
|
; REF: DW_AT_abstract_origin {{.*}} {[[F5_ABS:0x.*]]} "_ZN2F42f5Ev"
|
|
; REF: [[F5_ABS]]: DW_TAG_subprogram
|
|
; REF-NOT: {{DW_TAG|NULL}}
|
|
; REF: linkage_name {{.*}} "_ZN2F42f5Ev"
|
|
; REF-NEXT: DW_AT_specification {{.*}} {[[F5_DECL]]}
|
|
; REF: DW_TAG_inlined_subroutine
|
|
; REF-NOT: {{DW_TAG|NULL}}
|
|
; REF: DW_AT_abstract_origin {{.*}} {[[F5_ABS]]}
|
|
|
|
|
|
; Function Attrs: alwaysinline uwtable
|
|
define void @_Z2f2v() #0 !dbg !6 {
|
|
entry:
|
|
call void @_Z2f1v(), !dbg !9
|
|
ret void, !dbg !10
|
|
}
|
|
|
|
declare void @_Z2f1v()
|
|
|
|
; Function Attrs: uwtable
|
|
define void @_Z2f3v() !dbg !11 {
|
|
entry:
|
|
call void @_Z2f1v(), !dbg !12
|
|
ret void, !dbg !14
|
|
}
|
|
|
|
; Function Attrs: alwaysinline uwtable
|
|
define void @_ZN2F42f5Ev() #0 align 2 !dbg !15 {
|
|
entry:
|
|
call void @_Z2f1v(), !dbg !19
|
|
ret void, !dbg !20
|
|
}
|
|
|
|
; Function Attrs: uwtable
|
|
define void @_Z2f6v() !dbg !21 {
|
|
entry:
|
|
call void @_Z2f1v(), !dbg !22
|
|
ret void, !dbg !24
|
|
}
|
|
|
|
attributes #0 = { alwaysinline }
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!3, !4}
|
|
!llvm.ident = !{!5}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 4.0.0 (trunk 288231)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
|
|
!1 = !DIFile(filename: "linkage-name-abstract-static.cpp", directory: "/home/probinson/projects/scratch")
|
|
!2 = !{}
|
|
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!5 = !{!"clang version 4.0.0 (trunk 288231)"}
|
|
!6 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
|
|
!7 = !DISubroutineType(types: !8)
|
|
!8 = !{null}
|
|
!9 = !DILocation(line: 3, column: 3, scope: !6)
|
|
!10 = !DILocation(line: 4, column: 1, scope: !6)
|
|
!11 = distinct !DISubprogram(name: "f3", linkageName: "_Z2f3v", scope: !1, file: !1, line: 5, type: !7, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
|
|
!12 = !DILocation(line: 3, column: 3, scope: !6, inlinedAt: !13)
|
|
!13 = distinct !DILocation(line: 6, column: 3, scope: !11)
|
|
!14 = !DILocation(line: 7, column: 1, scope: !11)
|
|
!15 = distinct !DISubprogram(name: "f5", linkageName: "_ZN2F42f5Ev", scope: !16, file: !1, line: 12, type: !7, isLocal: false, isDefinition: true, scopeLine: 12, flags: DIFlagPrototyped, isOptimized: false, unit: !0, declaration: !18, retainedNodes: !2)
|
|
!16 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "F4", file: !1, line: 9, size: 8, elements: !17, identifier: "_ZTS2F4")
|
|
!17 = !{!18}
|
|
!18 = !DISubprogram(name: "f5", linkageName: "_ZN2F42f5Ev", scope: !16, file: !1, line: 10, type: !7, isLocal: false, isDefinition: false, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: false)
|
|
!19 = !DILocation(line: 13, column: 3, scope: !15)
|
|
!20 = !DILocation(line: 14, column: 1, scope: !15)
|
|
!21 = distinct !DISubprogram(name: "f6", linkageName: "_Z2f6v", scope: !1, file: !1, line: 15, type: !7, isLocal: false, isDefinition: true, scopeLine: 15, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
|
|
!22 = !DILocation(line: 13, column: 3, scope: !15, inlinedAt: !23)
|
|
!23 = distinct !DILocation(line: 16, column: 3, scope: !21)
|
|
!24 = !DILocation(line: 17, column: 1, scope: !21)
|