[all-commits] [llvm/llvm-project] d2e4cc: [LV] Ignore candidate VFs with invalid costs.

[sdesmalen-arm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d2e4ccc79023fcc5fb87ec6873a7856250e55eaa
      https://github.com/llvm/llvm-project/commit/d2e4ccc79023fcc5fb87ec6873a7856250e55eaa
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2021-07-12 (Mon, 12 Jul 2021)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll

  Log Message:
  -----------
  [LV] Ignore candidate VFs with invalid costs.

This follows on from discussion on the mailing-list:
  https://lists.llvm.org/pipermail/llvm-dev/2021-June/151047.html

to interpret an Invalid cost as 'infinitely expensive', as this
simplifies some of the legalization issues with scalable vectors.

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D105473