[PATCH] D70370: llvm/ObjCARC: Eliminate inlined AutoreleaseRV calls

[Duncan P. N. Exon Smith via Phabricator via llvm-commits]

dexonsmith created this revision.
dexonsmith added reviewers: ahatanak, rjmccall.
Herald added subscribers: ributzka, hiraditya.
Herald added a project: LLVM.

Pair up inlined AutoreleaseRV calls with their matching RetainRV or
ClaimRV.

- For RetainRV, delete both instructions.
- For ClaimRV, replace with a normal Release and then run the usual optimizations.

This avoids problems where more aggressive inlining triggers memory
regressions.


https://reviews.llvm.org/D70370

Files:
  llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
  llvm/test/Transforms/ObjCARC/inlined-autorelease-return-value.ll
  llvm/test/Transforms/ObjCARC/unsafe-claim-rv.ll

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