llvm-project/llvm/test/Transforms/ObjCARC
Adrian Prantl 75819aedf6 [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
..
allocas.ll
apelim.ll
basic.ll [PR27284] Reverse the ownership between DICompileUnit and DISubprogram. 2016-04-15 15:57:41 +00:00
cfg-hazards.ll
comdat-ipo.ll Don't IPO over functions that can be de-refined 2016-04-08 00:48:30 +00:00
contract-end-of-use-list.ll
contract-marker.ll Add support for objc_unsafeClaimAutoreleasedReturnValue to the 2016-01-27 19:05:08 +00:00
contract-storestrong-ivar.ll
contract-storestrong.ll
contract-testcases.ll
contract.ll
empty-block.ll
ensure-that-exception-unwind-path-is-visited.ll [PR27284] Reverse the ownership between DICompileUnit and DISubprogram. 2016-04-15 15:57:41 +00:00
escape.ll
expand.ll
gvn.ll
intrinsic-use-isolated.ll
intrinsic-use.ll
invoke.ll
move-and-form-retain-autorelease.ll
move-and-merge-autorelease.ll
nested.ll Revert "Change memcpy/memset/memmove to have dest and source alignments." 2015-11-19 05:56:52 +00:00
path-overflow.ll
pointer-types.ll
post-inlining.ll
pr12270.ll
provenance.ll [PM/AA] Rebuild LLVM's alias analysis infrastructure in a way compatible 2015-09-09 17:55:00 +00:00
retain-block-side-effects.ll
retain-not-declared.ll
rle-s2l.ll
rv.ll
split-backedge.ll
tail-call-invariant-enforcement.ll Add support for objc_unsafeClaimAutoreleasedReturnValue to the 2016-01-27 19:05:08 +00:00
unsafe-claim-rv.ll [ObjCARC] Handle ARCInstKind::ClaimRV in OptimizeIndividualCalls. 2016-02-17 18:51:27 +00:00
weak-contract.ll
weak-copies.ll
weak-dce.ll
weak.ll