[all-commits] [llvm/llvm-project] 7480cc: [TTI] New target hook emitGetActiveLaneMask

[sjoerdmeijer via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 7480ccbfc9d258a38eb99bbfccc6511e6ae10b70
      https://github.com/llvm/llvm-project/commit/7480ccbfc9d258a38eb99bbfccc6511e6ae10b70
  Author: Sjoerd Meijer <sjoerd.meijer at arm.com>
  Date:   2020-05-29 (Fri, 29 May 2020)

  Changed paths:
    M llvm/include/llvm/Analysis/TargetTransformInfo.h
    M llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
    M llvm/include/llvm/CodeGen/BasicTTIImpl.h
    M llvm/lib/Analysis/TargetTransformInfo.cpp
    M llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
    M llvm/lib/Target/ARM/ARMTargetTransformInfo.h

  Log Message:
  -----------
  [TTI] New target hook emitGetActiveLaneMask

This is split off from D79100 and adds a new target hook emitGetActiveLaneMask
that can be queried to check if the intrinsic @llvm.get.active.lane.mask() is
supported by the backend and if it should be emitted for a given loop.

See also commit rG7fb8a40e5220 and its commit message for more details/context
on this new intrinsic.

Differential Revision: https://reviews.llvm.org/D80597