[all-commits] [llvm/llvm-project] 36d70a: [VPlan] Remove redundant blocks by merging them in...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 36d70a6aea6bfd22e4f83387ff1019ebb1f86233
      https://github.com/llvm/llvm-project/commit/36d70a6aea6bfd22e4f83387ff1019ebb1f86233
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2022-12-26 (Mon, 26 Dec 2022)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.h
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence-sink-replicate-region.ll
    M llvm/test/Transforms/LoopVectorize/interleave-and-scalarize-only.ll
    M llvm/test/Transforms/LoopVectorize/vplan-iv-transforms.ll
    M llvm/test/Transforms/LoopVectorize/vplan-printing.ll
    M llvm/test/Transforms/LoopVectorize/vplan-sink-scalars-and-merge-vf1.ll
    M llvm/test/Transforms/LoopVectorize/vplan-sink-scalars-and-merge.ll

  Log Message:
  -----------
  [VPlan] Remove redundant blocks by merging them into predecessors.

Add and run VPlan transform to fold blocks with a single predecessor
into the predecessor. This remove redundant blocks and addresses a TODO
to replace special handling for the vector latch VPBB.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D139927