[PATCH] D30471: [DAG] Relax conditions under stores of loaded values can be merged

[Nirav Dave via Phabricator via llvm-commits]

niravd created this revision.

Allow consecutive stores who's values come from consecutive loads to
be merged in the prescense of other users of the load. This may cause
as many as N redundant loads with the guarantee of merging N stores
which should almost always be a relative win.

Fixes PR32086.


https://reviews.llvm.org/D30471

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/X86/merge_store_duplicated_loads.ll

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