[PATCH] D26011: [X86][AVX512DQ] Improve lowering of MUL v2i64 and v4i64

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: delena, igorb.
RKSimon added a subscriber: llvm-commits.
RKSimon set the repository for this revision to rL LLVM.

With DQI but without VLX, lower v2i64 and v4i64 MUL operations with v8i64 MUL (vpmullq).

Updated cost table accordingly.


Repository:
  rL LLVM

https://reviews.llvm.org/D26011

Files:
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86TargetTransformInfo.cpp
  test/Analysis/CostModel/X86/arith.ll
  test/CodeGen/X86/avx512-arith.ll

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