[PATCH] D11547: AliasSetTracker "fixme" fix - using mod/ref information for UnknownInstr

[Andrew Zhogin]

andrew.zhogin created this revision.
andrew.zhogin added reviewers: hfinkel, chandlerc.
andrew.zhogin added a subscriber: llvm-commits.

AliasSetTracker now doesn't convert access mode to ModRefAccess if new visited UnknownInst has only 'REF' modrefinfo to existing pointers is sets.

And ref-aliased by call pointers can be hoisted out of loop.

// FIXME: This should use mod/ref information to make this not suck so bad
Alias = SetMayAlias;
- Access = ModRefAccess;
+  Access = (MR & MRI_Mod) ? ModRefAccess : RefAccess;


http://reviews.llvm.org/D11547

Files:
  include/llvm/Analysis/AliasSetTracker.h
  lib/Analysis/AliasSetTracker.cpp
  test/Transforms/LICM/licm_call_referenced_ptr.ll

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