[PATCH] D11439: [X86][SSE] Vectorize i64 ASHR operations

[Simon Pilgrim]

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

This patch vectorizes the 2i64/4i64 ASHR shift operations - the only remaining integer vector shifts that still are being transferred to/from the scalar unit to be completed. 

Note: The poor code gen for the X32 tests will be improved by D11327.

Repository:
  rL LLVM

http://reviews.llvm.org/D11439

Files:
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86TargetTransformInfo.cpp
  test/Analysis/CostModel/X86/arith.ll
  test/Analysis/CostModel/X86/testshiftashr.ll
  test/CodeGen/X86/vector-shift-ashr-128.ll
  test/CodeGen/X86/vector-shift-ashr-256.ll
  utils/update_llc_test_checks.py

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