[PATCH] D17572: NFC. Introduce Value::getPointerDerferecnceableBytes.

[Artur Pilipenko via llvm-commits]

apilipenko created this revision.
apilipenko added reviewers: hfinkel, reames.
apilipenko added a subscriber: llvm-commits.

Extract a part of isDereferenceableAndAlignedPointer functionality to Value::getPointerDerferecnceableBytes. Currently it's a NFC, but in future I'm going to accumulate all the logic about value dereferenceability in this function similarly to Value::getPointerAlignment function (D16144). 

http://reviews.llvm.org/D17572

Files:
  include/llvm/IR/Value.h
  lib/Analysis/Loads.cpp
  lib/IR/Value.cpp

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