[PATCH] [LAA] Fix estimation of number of memchecks

[silviu.baranga at arm.com]

Removed the caching of getNumberOfCheck and updated the API to not return it as part of canCheckPtrAtRT.
Removed some dead code (NumReadPtrChecks and NumWritePtrChecks are no longer needed).

NeedRTCheck is now returned by canCheckPtrAtRT. I've also changed the logic that computes NeedRTChecks according to Michaels comment to make it more readable, and that change ended up being in canCheckPtrAtRT.


http://reviews.llvm.org/D10217

Files:
  include/llvm/Analysis/LoopAccessAnalysis.h
  lib/Analysis/LoopAccessAnalysis.cpp
  test/Analysis/LoopAccessAnalysis/number-of-memchecks.ll

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