summaryrefslogtreecommitdiffstats
path: root/llvm/test/CodeGen/X86/dwarf-comp-dir.ll
diff options
context:
space:
mode:
authorAdrian Prantl <aprantl@apple.com>2016-04-15 15:57:41 +0000
committerAdrian Prantl <aprantl@apple.com>2016-04-15 15:57:41 +0000
commit75819aedf6d774a424e35793b266442708e57050 (patch)
treee4eabf3bd19e9dee6ed3aefc8f4e2cb16d6bb285 /llvm/test/CodeGen/X86/dwarf-comp-dir.ll
parente76bda544bbf52d9ff3b55e6018b494a1e6bbc00 (diff)
downloadbcm5719-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/dwarf-comp-dir.ll')
-rw-r--r--llvm/test/CodeGen/X86/dwarf-comp-dir.ll2
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/test/CodeGen/X86/dwarf-comp-dir.ll b/llvm/test/CodeGen/X86/dwarf-comp-dir.ll
index 6bb15ecf291..b744a70288e 100644
--- a/llvm/test/CodeGen/X86/dwarf-comp-dir.ll
+++ b/llvm/test/CodeGen/X86/dwarf-comp-dir.ll
@@ -7,7 +7,7 @@ target triple = "x86_64-unknown-linux-gnu"
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!5}
-!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.1 (trunk 143523)", isOptimized: true, emissionKind: FullDebug, file: !4, enums: !2, retainedTypes: !7, subprograms: !2, globals: !2)
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.1 (trunk 143523)", isOptimized: true, emissionKind: FullDebug, file: !4, enums: !2, retainedTypes: !7, globals: !2)
!2 = !{}
!3 = !DIFile(filename: "empty.c", directory: "/home/nlewycky")
!4 = !DIFile(filename: "empty.c", directory: "/home/nlewycky")
OpenPOWER on IntegriCloud