[all-commits] [llvm/llvm-project] ae3664: [LV] get.active.lane.mask consuming tripcount inst...

[sjoerdmeijer via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ae366479e8c67c18756a823e6ce1c7fcd86a208f
      https://github.com/llvm/llvm-project/commit/ae366479e8c67c18756a823e6ce1c7fcd86a208f
  Author: Sjoerd Meijer <sjoerd.meijer at arm.com>
  Date:   2020-08-25 (Tue, 25 Aug 2020)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.cpp
    M llvm/test/Transforms/LoopVectorize/ARM/mve-gather-scatter-tailpred.ll
    M llvm/test/Transforms/LoopVectorize/ARM/mve-reduction-predselect.ll
    M llvm/test/Transforms/LoopVectorize/ARM/prefer-tail-loop-folding.ll
    M llvm/test/Transforms/LoopVectorize/ARM/tail-folding-counting-down.ll
    M llvm/test/Transforms/LoopVectorize/ARM/tail-folding-loop-hint.ll
    M llvm/test/Transforms/LoopVectorize/ARM/tail-folding-prefer-flag.ll

  Log Message:
  -----------
  [LV] get.active.lane.mask consuming tripcount instead of backedge-taken count

This adapts LV to the new semantics of get.active.lane.mask as discussed in
D86147, which means that the LV now emits intrinsic get.active.lane.mask with
the loop tripcount instead of the backedge-taken count as its second argument.
The motivation for this is described in D86147.

Differential Revision: https://reviews.llvm.org/D86304