[PATCH] D31924: SROA: Allow eliminating addrspacecasted allocas

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added a subscriber: wdng.

This is a resurrection of https://reviews.llvm.org/D10482 and https://reviews.llvm.org/D4501

There is a circular dependency between SROA and
InferAddressSpaces today that requires running both
multiple  times in order to be able to eliminate all
simple allocas and addrspacecasts. 
InferAddressSpaces can't remove addrspacecasts when
written to memory, and SROA helps move pointers out
of memory.


https://reviews.llvm.org/D31924

Files:
  docs/LangRef.rst
  include/llvm/Analysis/PtrUseVisitor.h
  lib/Transforms/Scalar/SROA.cpp
  test/Transforms/SROA/basictest.ll

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