[PATCH] D42431: [X86][AVX] LowerBUILD_VECTORAsVariablePermute - add support for VPERMILPV to v2i64/v2f64

[Simon Pilgrim via Phabricator via llvm-commits]

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

Minor refactor to make it possible for LowerBUILD_VECTORAsVariablePermute to be used with a wider variety of shuffles op and types.

I'd have liked to add v4i32/v4f32 support as well but we don't see v4i32 index extractions at the moment (which is why I created https://reviews.llvm.org/D42308)

After this I intend to begin adding scaling support for PSHUFB (v8i16, v4i32, v2i64)) and VPERMPS (v4f64, v4i64).


Repository:
  rL LLVM

https://reviews.llvm.org/D42431

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/var-permute-128.ll

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