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| author | Adrian Prantl <aprantl@apple.com> | 2016-04-15 15:57:41 +0000 |
|---|---|---|
| committer | Adrian Prantl <aprantl@apple.com> | 2016-04-15 15:57:41 +0000 |
| commit | 75819aedf6d774a424e35793b266442708e57050 (patch) | |
| tree | e4eabf3bd19e9dee6ed3aefc8f4e2cb16d6bb285 /llvm/test/CodeGen/X86/MachineSink-DbgValue.ll | |
| parent | e76bda544bbf52d9ff3b55e6018b494a1e6bbc00 (diff) | |
| download | bcm5719-llvm-75819aedf6d774a424e35793b266442708e57050.tar.gz bcm5719-llvm-75819aedf6d774a424e35793b266442708e57050.zip | |
[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
Diffstat (limited to 'llvm/test/CodeGen/X86/MachineSink-DbgValue.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/MachineSink-DbgValue.ll | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/llvm/test/CodeGen/X86/MachineSink-DbgValue.ll b/llvm/test/CodeGen/X86/MachineSink-DbgValue.ll index 33c6e2fc390..a794c896eb2 100644 --- a/llvm/test/CodeGen/X86/MachineSink-DbgValue.ll +++ b/llvm/test/CodeGen/X86/MachineSink-DbgValue.ll @@ -28,8 +28,8 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!22} -!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "Apple clang version 3.0 (tags/Apple/clang-211.10.1) (based on LLVM 3.0svn)", isOptimized: true, emissionKind: FullDebug, file: !20, enums: !21, retainedTypes: !21, subprograms: !18, imports: null) -!1 = distinct !DISubprogram(name: "foo", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, file: !20, scope: !2, type: !3, variables: !19) +!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "Apple clang version 3.0 (tags/Apple/clang-211.10.1) (based on LLVM 3.0svn)", isOptimized: true, emissionKind: FullDebug, file: !20, enums: !21, retainedTypes: !21, imports: null) +!1 = distinct !DISubprogram(name: "foo", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, file: !20, scope: !2, type: !3, variables: !19) !2 = !DIFile(filename: "a.c", directory: "/private/tmp") !3 = !DISubroutineType(types: !4) !4 = !{!5} @@ -46,7 +46,6 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnon !15 = !DILocation(line: 4, column: 3, scope: !11) !16 = !DILocation(line: 5, column: 5, scope: !11) !17 = !DILocation(line: 7, column: 1, scope: !11) -!18 = !{!1} !19 = !{!6, !7, !10} !20 = !DIFile(filename: "a.c", directory: "/private/tmp") !21 = !{} |
