[all-commits] [llvm/llvm-project] af7e15: [LV] Vectorizer should adjust trip count in profil...

[ebrevnov via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: af7e1588727c691ae07e286c94dbcbf31060e876
      https://github.com/llvm/llvm-project/commit/af7e1588727c691ae07e286c94dbcbf31060e876
  Author: Evgeniy Brevnov <evgueni.brevnov at gmail.com>
  Date:   2020-01-20 (Mon, 20 Jan 2020)

  Changed paths:
    M llvm/include/llvm/Transforms/Utils/LoopUtils.h
    M llvm/lib/Transforms/Utils/LoopUtils.cpp
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    A llvm/test/Transforms/LoopVectorize/check-prof-info.ll
    M llvm/test/Transforms/LoopVectorize/tripcount.ll

  Log Message:
  -----------
  [LV] Vectorizer should adjust trip count in profile information

Summary: Vectorized loop processes VFxUF number of elements in one iteration thus total number of iterations decreases proportionally. In addition epilog loop may not have more than VFxUF - 1 iterations. This patch updates profile information accordingly.

Reviewers: hsaito, Ayal, fhahn, reames, silvas, dcaballe, SjoerdMeijer, mkuper, DaniilSuchkov

Reviewed By: Ayal, DaniilSuchkov

Subscribers: fedor.sergeev, hiraditya, rkruppe, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67905