[PATCH] D57218: [X86] Combine masked store and truncate into masked truncating stores.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: RKSimon, spatel.

We also need to combine to masked truncating with saturation stores, but I'm leaving that for a future patch.

This does regress some tests that used truncate wtih saturation followed by a masked store. Those now use a truncating store and use min/max to saturate.


Repository:
  rL LLVM

https://reviews.llvm.org/D57218

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/masked_store_trunc.ll
  test/CodeGen/X86/masked_store_trunc_ssat.ll
  test/CodeGen/X86/masked_store_trunc_usat.ll

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