[PATCH] D14584: [CodeGenPrepare] Create more extloads and fewer ands

[Geoff Berry via llvm-commits]

gberry created this revision.
gberry added reviewers: mcrosier, qcolombet, ab.
gberry added a subscriber: llvm-commits.

Add and instructions immediately after loads that only have their low
bits used, assuming that the (and (load x) c) will be matched as a
extload and the ands/truncs fed by the extload will be removed by isel.

http://reviews.llvm.org/D14584

Files:
  lib/CodeGen/CodeGenPrepare.cpp
  test/CodeGen/AArch64/free-zext.ll

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