[PATCH] llvm.noalias - BasicAA should look through them too

[hfinkel at anl.gov]

Hi chandlerc, reames, dberlin,

This is part of the series started by D9375, and teaches BasicAA to look though the llvm.noalias intrinsic calls when answering queries. This is essential so that we don't loose all other AA information when supplementing with llvm.noalias.

http://reviews.llvm.org/D9383

Files:
  include/llvm/IR/Value.h
  lib/Analysis/BasicAliasAnalysis.cpp
  lib/Analysis/ValueTracking.cpp
  lib/IR/Value.cpp
  test/Analysis/BasicAA/noalias.ll

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