[all-commits] [llvm/llvm-project] 3a846d: [VPlan] Reject loops without computable backedge t...

[Florian Hahn via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 3a846d4d9242ff02f4edff07b659d7d38ce2b0c9
      https://github.com/llvm/llvm-project/commit/3a846d4d9242ff02f4edff07b659d7d38ce2b0c9
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2020-06-12 (Fri, 12 Jun 2020)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    A llvm/test/Transforms/LoopVectorize/vplan-outer-loop-uncomputable-trip-count.ll

  Log Message:
  -----------
  [VPlan] Reject loops without computable backedge taken counts

getOrCreateTripCount is used to generate code for the outer loop, but it
requires a computable backedge taken counts. Check that in the VPlan
native path.

Reviewers: Ayal, gilr, rengolin, sguggill

Reviewed By: sguggill

Differential Revision: https://reviews.llvm.org/D81088