[all-commits] [llvm/llvm-project] e5bf2e: [SLP] Use the width of value truncated just before...

[Anton Afanasyev via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: e5bf2e8989469ec328d910be26bd3ee0710326d9
      https://github.com/llvm/llvm-project/commit/e5bf2e8989469ec328d910be26bd3ee0710326d9
  Author: Anton Afanasyev <anton.a.afanasyev at gmail.com>
  Date:   2020-12-09 (Wed, 09 Dec 2020)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/insert-after-bundle.ll
    M llvm/test/Transforms/SLPVectorizer/X86/pr46983.ll

  Log Message:
  -----------
  [SLP] Use the width of value truncated just before storing

For stores chain vectorization we choose the size of vector
elements to ensure we fit to minimum and maximum vector register
size for the number of elements given. This patch corrects vector
element size choosing the width of value truncated just before
storing instead of the width of value stored.

Fixes PR46983

Differential Revision: https://reviews.llvm.org/D92824