[all-commits] [llvm/llvm-project] 8ea274: [VPlan] Fix in-loop reduction chains using VPlan d...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8ea274b46beb01756c2b26743fa165d3cbdeb355
      https://github.com/llvm/llvm-project/commit/8ea274b46beb01756c2b26743fa165d3cbdeb355
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2023-08-02 (Wed, 02 Aug 2023)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h

  Log Message:
  -----------
  [VPlan] Fix in-loop reduction chains using VPlan def-use chains (NFCI)

Update adjustRecipesForReductions to directly use the VPlan def-use
chains for in-loop reductions to collect the reduction operations that
need adjusting.

This allows the removal of
 * ReductionChainMap
 * recording of recipes for instruction in the reduction chain
 * removes late uses of getVPValue
 * removes to need for removeVPValueFor.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D155845