diff options
| 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 | 4eeaa0da042055b1cd17b339e2dde518a3026033 (patch) | |
| tree | 8a6f75dc7e081da93edbb95ca3204da4e065d53b /test/BugPoint | |
| parent | fa0d0a5126218ae6a2a9ecf995b4f2a4f5f4c977 (diff) | |
[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>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266446 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/BugPoint')
| -rw-r--r-- | test/BugPoint/metadata.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/test/BugPoint/metadata.ll b/test/BugPoint/metadata.ll index de4587a6354..1f2f6a90183 100644 --- a/test/BugPoint/metadata.ll +++ b/test/BugPoint/metadata.ll @@ -31,8 +31,8 @@ declare void @foo() !3 = !{!"noise"} !4 = !{!"filler"} -!8 = distinct !DICompileUnit(language: DW_LANG_C99, file: !15, subprograms: !{!9}) -!9 = distinct !DISubprogram(name: "test", file: !15) +!8 = distinct !DICompileUnit(language: DW_LANG_C99, file: !15) +!9 = distinct !DISubprogram(name: "test", file: !15, unit: !8) !10 = !DILocation(line: 100, column: 101, scope: !9) !11 = !DILocation(line: 102, column: 103, scope: !9) !12 = !DILocation(line: 104, column: 105, scope: !9) |