[PATCH] D123537: [VPlan] Model first exit values in VPlan.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: Ayal, gilr, rengolin.
Herald added subscribers: tschuett, psnobl, rogfer01, bollu, hiraditya.
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This patch introduces a new VPInstruction opcode to model exit values
explicitly. The initial ExitValue VPInstruction handles exit values that
are neither part of induction or reduction chains nor first order
recurrence phis.

Fixes #51366.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D123537

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/lib/Transforms/Vectorize/VPlan.cpp
  llvm/lib/Transforms/Vectorize/VPlan.h
  llvm/test/Transforms/LoopVectorize/AArch64/scalable-avoid-scalarization.ll
  llvm/test/Transforms/LoopVectorize/X86/invariant-load-gather.ll
  llvm/test/Transforms/LoopVectorize/X86/pr51366-sunk-instruction-used-outside-of-loop.ll
  llvm/test/Transforms/LoopVectorize/extract-last-veclane.ll
  llvm/test/Transforms/LoopVectorize/instruction-only-used-outside-of-loop.ll
  llvm/test/Transforms/LoopVectorize/optimal-epilog-vectorization-liveout.ll

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