[all-commits] [llvm/llvm-project] 0ef8ca: [VPlan] Do not create VPWidenCall recipes for scal...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0ef8ca6d88aa7e4abc1142c1ddd9da02f989d514
      https://github.com/llvm/llvm-project/commit/0ef8ca6d88aa7e4abc1142c1ddd9da02f989d514
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2022-05-02 (Mon, 02 May 2022)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/strict-fadd.ll
    M llvm/test/Transforms/LoopVectorize/interleave-with-call.ll

  Log Message:
  -----------
  [VPlan] Do not create VPWidenCall recipes for scalar vector factors.

'Widen' recipe are only used when actual vector values are generated.
Fix tryToWidenCall to do not create VPWidenCallRecipes for scalar vector
factors.

This was exposed by D123720, because the widened recipes are considered
vector users.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D124718