[PATCH] D149079: [VPlan] Record IR flags on VPWidenRecipe directly (NFC).

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: Ayal, gilr, rengolin.
Herald added subscribers: StephenFan, tschuett, psnobl, rogfer01, bollu, hiraditya.
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This patch introduces a VPIRFlags class to record various IR flags. 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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D149079

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/lib/Transforms/Vectorize/VPlan.h
  llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp

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