[PATCH] D39595: [CodeGen] Refactor DAG combine ReduceLoadWidth

[Sam Parker via Phabricator via llvm-commits]

samparker created this revision.

visitAND attempts to narrow the width of extending loads that are then masked off. ReduceLoadWidth already exists for a similar purpose and handles shifts, so I've moved the code to handle AND nodes there. Also simplified the API to isAndLoadExtLoad as the one of its reference argument was only used and calculated internally.


https://reviews.llvm.org/D39595

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp

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