[all-commits] [llvm/llvm-project] 0d736e: [VPlan] Add getSCEVExprForVPValue util, use to get...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0d736e296c2feed7709e002d5972ed60844b6b56
      https://github.com/llvm/llvm-project/commit/0d736e296c2feed7709e002d5972ed60844b6b56
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-09-18 (Wed, 18 Sep 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanAnalysis.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/lib/Transforms/Vectorize/VPlanUtils.cpp
    M llvm/lib/Transforms/Vectorize/VPlanUtils.h
    M llvm/unittests/Transforms/Vectorize/VPlanHCFGTest.cpp
    M llvm/unittests/Transforms/Vectorize/VPlanTestBase.h

  Log Message:
  -----------
  [VPlan] Add getSCEVExprForVPValue util, use to get trip count SCEV (NFC) (#94464)

Add a new getSCEVExprForVPValue utility which can be used to get a SCEV
expression for a VPValue. The initial implementation only returns SCEVs
for live-in IR values (by constructing a SCEV based on the live-in IR
value) and VPExpandSCEVRecipe. This is enough to serve its first use,
getting a SCEV for a VPlan's trip count, but will be extended in the
future.

It also removes createTripCountSCEV, as the new helper can be used to
retrieve the SCEV from the VPlan.

PR: https://github.com/llvm/llvm-project/pull/94464



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