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b056aa798d
Move the specialized metadata nodes for the new debug info hierarchy
into place, finishing off PR22464. I've done bootstraps (and all that)
and I'm confident this commit is NFC as far as DWARF output is
concerned. Let me know if I'm wrong :).
The code changes are fairly mechanical:
- Bumped the "Debug Info Version".
- `DIBuilder` now creates the appropriate subclass of `MDNode`.
- Subclasses of DIDescriptor now expect to hold their "MD"
counterparts (e.g., `DIBasicType` expects `MDBasicType`).
- Deleted a ton of dead code in `AsmWriter.cpp` and `DebugInfo.cpp`
for printing comments.
- Big update to LangRef to describe the nodes in the new hierarchy.
Feel free to make it better.
Testcase changes are enormous. There's an accompanying clang commit on
its way.
If you have out-of-tree debug info testcases, I just broke your build.
- `upgrade-specialized-nodes.sh` is attached to PR22564. I used it to
update all the IR testcases.
- Unfortunately I failed to find way to script the updates to CHECK
lines, so I updated all of these by hand. This was fairly painful,
since the old CHECKs are difficult to reason about. That's one of
the benefits of the new hierarchy.
This work isn't quite finished, BTW. The `DIDescriptor` subclasses are
almost empty wrappers, but not quite: they still have loose casting
checks (see the `RETURN_FROM_RAW()` macro). Once they're completely
gutted, I'll rename the "MD" classes to "DI" and kill the wrappers. I
also expect to make a few schema changes now that it's easier to reason
about everything.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231082 91177308-0d34-0410-b5e6-96231b3b80d8
120 lines
5.6 KiB
LLVM
120 lines
5.6 KiB
LLVM
; RUN: llc -split-dwarf=Enable -O0 < %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj | llvm-dwarfdump -debug-dump=info - | FileCheck %s
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; Test the emission of gmlt-like inlining information into the skeleton unit.
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; This allows inline-aware symbolication/backtracing given only the linked
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; executable, without needing access to the .dwos.
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; A simple example of inlining generated with clang -gsplit-dwarf
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; A member function is used to force emission of the declaration of the
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; function into the .dwo file, which may be shared with other CUs in the dwo ;
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; under fission, but should not be shared with the skeleton's CU. This also
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; tests the general case of context emission, which is suppressed in gmlt-like
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; data.
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; Include a template just to test template parameters are not emitted in
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; gmlt-like data.
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; And some varargs to make sure DW_TAG_unspecified_parameters is not emitted.
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; And a using declaration in a nested lexical_block... because that shouldn't
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; be emitted either.
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; Minor complication: after generating the LLVM IR, it was manually edited so
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; that the 'f1()' call from f3 was reordered to appear between the two inlined
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; f1 calls from f2. This causes f2's inlined_subroutine to use DW_AT_ranges,
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; thus exercising range list generation/referencing which was buggy.
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; struct foo {
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; template<typename T>
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; static void f2();
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; static void f3(...);
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; };
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;
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; void f1();
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;
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; template<typename T>
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; inline __attribute__((always_inline)) void foo::f2() {
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; f1();
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; f1();
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; }
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;
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; void foo::f3(...) {
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; if (true) {
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; f1();
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; f2<int>();
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; using ::foo;
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; }
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; }
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; Check that we emit the usual gmlt-like data for this file, including brief
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; descriptions of subprograms with inlined scopes.
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; FIXME: Once tools support indexed addresses in the skeleton CU, we should use
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; those (DW_FORM_addr would become DW_FORM_GNU_addr_index below) since those
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; addresses will already be in the address pool anyway.
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; CHECK: DW_TAG_subprogram
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; CHECK-NEXT: DW_AT_name {{.*}} "f2<int>"
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; CHECK-NOT: DW_
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; CHECK: DW_TAG_subprogram
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; CHECK-NEXT: DW_AT_low_pc [DW_FORM_addr]
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; CHECK-NEXT: DW_AT_high_pc
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; CHECK-NEXT: DW_AT_name {{.*}} "f3"
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; CHECK-NOT: {{DW_|NULL}}
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; CHECK: DW_TAG_inlined_subroutine
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; CHECK-NEXT: DW_AT_abstract_origin {{.*}} "f2<int>"
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; CHECK-NEXT: DW_AT_ranges
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; CHECK-NEXT: DW_AT_call_file
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; CHECK-NEXT: DW_AT_call_line {{.*}} (18)
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; CHECK-NOT: DW_
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; Function Attrs: uwtable
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define void @_ZN3foo2f3Ez(...) #0 align 2 {
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entry:
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call void @_Z2f1v(), !dbg !26
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call void @_Z2f1v(), !dbg !25
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call void @_Z2f1v(), !dbg !28
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ret void, !dbg !29
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}
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declare void @_Z2f1v() #1
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attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!22, !23}
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!llvm.ident = !{!24}
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!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 ", isOptimized: false, splitDebugFilename: "fission-inline.dwo", emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !9, globals: !2, imports: !18)
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!1 = !MDFile(filename: "fission-inline.cpp", 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: "foo", line: 1, size: 8, align: 8, file: !1, elements: !5, identifier: "_ZTS3foo")
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!5 = !{!6}
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!6 = !MDSubprogram(name: "f3", linkageName: "_ZN3foo2f3Ez", line: 4, isLocal: false, isDefinition: false, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 4, file: !1, scope: !"_ZTS3foo", type: !7)
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!7 = !MDSubroutineType(types: !8)
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!8 = !{null, null}
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!9 = !{!10, !11}
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!10 = !MDSubprogram(name: "f3", linkageName: "_ZN3foo2f3Ez", line: 15, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 15, file: !1, scope: !"_ZTS3foo", type: !7, function: void (...)* @_ZN3foo2f3Ez, declaration: !6, variables: !2)
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!11 = !MDSubprogram(name: "f2<int>", linkageName: "_ZN3foo2f2IiEEvv", line: 10, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 10, file: !1, scope: !"_ZTS3foo", type: !12, templateParams: !14, declaration: !17, variables: !2)
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!12 = !MDSubroutineType(types: !13)
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!13 = !{null}
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!14 = !{!15}
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!15 = !MDTemplateTypeParameter(name: "T", type: !16)
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!16 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!17 = !MDSubprogram(name: "f2<int>", linkageName: "_ZN3foo2f2IiEEvv", line: 10, isLocal: false, isDefinition: false, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 10, file: !1, scope: !"_ZTS3foo", type: !12, templateParams: !14)
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!18 = !{!19}
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!19 = !MDImportedEntity(tag: DW_TAG_imported_declaration, line: 19, scope: !20, entity: !"_ZTS3foo")
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!20 = distinct !MDLexicalBlock(line: 16, column: 13, file: !1, scope: !21)
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!21 = distinct !MDLexicalBlock(line: 16, column: 7, file: !1, scope: !10)
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!22 = !{i32 2, !"Dwarf Version", i32 4}
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!23 = !{i32 2, !"Debug Info Version", i32 3}
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!24 = !{!"clang version 3.6.0 "}
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!25 = !MDLocation(line: 17, column: 5, scope: !20)
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!26 = !MDLocation(line: 11, column: 3, scope: !11, inlinedAt: !27)
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!27 = !MDLocation(line: 18, column: 5, scope: !20)
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!28 = !MDLocation(line: 12, column: 3, scope: !11, inlinedAt: !27)
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!29 = !MDLocation(line: 21, column: 1, scope: !10)
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