[PATCH] D84665: [Attributor] Implement AAReachability

[Shinji Okumura via Phabricator via llvm-commits]

okura created this revision.
okura added a reviewer: jdoerfert.
Herald added subscribers: llvm-commits, bbn, kuter, uenoku, hiraditya.
Herald added a reviewer: sstefan1.
Herald added a reviewer: uenoku.
Herald added a reviewer: homerdin.
Herald added a reviewer: baziotis.
Herald added a project: LLVM.

Currently, AAReachability does not compute anything and only use `isPotentiallyReachable`.
This patch makes it possible for AAReachability to use liveness information from `AAIsDead`.
 In `AAReachability::updateImpl`, we collect reachable successor basic blocks for each basic block and construct a graph.
When reachability between two instructions is queried,  check it using the graph.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D84665

Files:
  llvm/include/llvm/Transforms/IPO/Attributor.h
  llvm/lib/Transforms/IPO/AttributorAttributes.cpp
  llvm/test/Transforms/Attributor/callbacks.ll
  llvm/test/Transforms/Attributor/noalias.ll
  llvm/test/Transforms/Attributor/read_write_returned_arguments_scc.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D84665.280927.patch
Type: text/x-patch
Size: 17295 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20200727/36abe954/attachment.bin>