llvm-mirror/test/tools/dsymutil
Adrian Prantl fb3abba237 [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
2016-04-15 15:57:41 +00:00
..
ARM [dsymutil] Support scattered relocs. 2016-02-01 03:44:22 +00:00
Inputs [PR27284] Reverse the ownership between DICompileUnit and DISubprogram. 2016-04-15 15:57:41 +00:00
X86 [dsymutil] Fix FileCheck command. 2016-01-31 04:39:16 +00:00
absolute_symbol.test Fix tests that used CHECK-NEXT-NOT and CHECK-DAG-NOT. 2016-02-26 19:40:34 +00:00
arch-option.test Tweak llvm/test/tools/dsymutil/arch-option.test to avoid globbing on mingw-w64. 2015-08-07 08:38:22 +00:00
archive-timestamp.test
basic-linking.test [dsymutil] Fix handling of common symbols. 2016-01-31 04:29:34 +00:00
debug-map-parsing.test [dsymutil] Fix handling of common symbols. 2016-01-31 04:29:34 +00:00
dump-symtab.test [dsymutil] Implement -symtab/-s option. 2015-08-31 00:29:09 +00:00
fat-binary-output.test [dsymutil] Add (unimplemented) --flat option 2015-08-06 21:05:01 +00:00
yaml-object-address-rewrite.test [dsymutil] Fix handling of common symbols. 2016-01-31 04:29:34 +00:00