[all-commits] [llvm/llvm-project] 13bf60: Title: [LV] Handle Fold-Tail of loops with vectori...

[Anh Tuyen Tran via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 13bf6039c9ae959598e8c117c3d8c5a72303fd2b
      https://github.com/llvm/llvm-project/commit/13bf6039c9ae959598e8c117c3d8c5a72303fd2b
  Author: Anh Tuyen Tran <anhtuyen at ca.ibm.com>
  Date:   2020-05-22 (Fri, 22 May 2020)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlan.cpp
    A llvm/test/Transforms/LoopVectorize/tail-folding-vectorization-factor-1.ll

  Log Message:
  -----------
  Title: [LV] Handle Fold-Tail of loops with vectorizarion factor equal to 1

Summary:
When handling loops whose VF is 1, fold-tail vectorization sets the
backedge taken count of the original loop with a vector of a single
element. This causes type-mismatch during instruction generartion.

The purpose of this patch is toto address the case of VF==1.

Reviewer: Ayal (Ayal Zaks), bmahjour (Bardia Mahjour), fhahn (Florian Hahn), gilr (Gil Rapaport), rengolin (Renato Golin)

Reviewed By: Ayal (Ayal Zaks), bmahjour (Bardia Mahjour), fhahn (Florian Hahn)

Subscribers: Ayal (Ayal Zaks), rkruppe (Hanna Kruppe), bmahjour (Bardia Mahjour), rogfer01 (Roger Ferrer Ibanez), vkmr (Vineet Kumar), bollu (Siddharth Bhat), hiraditya (Aditya Kumar), llvm-commits (Mailing List llvm-commits)

Tag: LLVM

Differential Revision: https://reviews.llvm.org/D79976