[PATCH] D101297: [SLP]Allow masked gathers only if allowed by target.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: spatel, RKSimon.
Herald added a subscriber: hiraditya.
ABataev requested review of this revision.
Herald added a project: LLVM.

Need to check if target allows/supports masked gathers before trying to
emit it, otherwise may generate less performant code for the targets
where masked gathers are slower than regular gathers.

Part of D57059 <https://reviews.llvm.org/D57059>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101297

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll
  llvm/test/Transforms/SLPVectorizer/X86/pr47623.ll
  llvm/test/Transforms/SLPVectorizer/X86/pr47629-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/X86/pr47629.ll

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