[PATCH] D56719: [DAGCombine] Enable more pre-indexed stores

[Sam Parker via Phabricator via llvm-commits]

samparker updated this revision to Diff 182029.
samparker added a comment.

Hi Eli,

I've added more tests and a few comments.

Yes, predecessor checks are expensive, how about adding an upper limit of uses and/or performing this check under a target flag?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D56719/new/

https://reviews.llvm.org/D56719

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/ARM/indexed-mem.ll

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