[all-commits] [llvm/llvm-project] 127b00: [VPlan] Record IR flags on VPWidenRecipe directly ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 127b00b25ccb8e9417256146fe3b638fbd5c8908
      https://github.com/llvm/llvm-project/commit/127b00b25ccb8e9417256146fe3b638fbd5c8908
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2023-05-08 (Mon, 08 May 2023)

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

  Log Message:
  -----------
  [VPlan] Record IR flags on VPWidenRecipe directly (NFC).

This patch introduces a VPRecipeWithIRFlags class to record various IR
flags for a recipe. This allows de-coupling of IR flags from the
underlying instructions. The main benefit is that it allows dropping of
IR flags from recipes directly, without the need to go through
State::MayGeneratePoisonRecipes. The plan is to remove
MayGeneratePoisonRecipes once all relevant recipes are transitioned.

It also allows dropping IR flags during VPlan-to-VPlan transforms, which
will be used in a follow-up patch to implement truncateToMinimalBitwidths
as VPlan-to-VPlan transform.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D149079