[all-commits] [llvm/llvm-project] 898bba: [SLP]Initial support for copyable elements (non-sc...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 898bba311f180ed54de33dc09e7071c279a4942a
      https://github.com/llvm/llvm-project/commit/898bba311f180ed54de33dc09e7071c279a4942a
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2025-07-23 (Wed, 23 Jul 2025)

  Changed paths:
    M llvm/docs/ReleaseNotes.md
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/buildvector-schedule-for-subvector.ll
    M llvm/test/Transforms/SLPVectorizer/X86/extract-scalar-from-undef.ll
    M llvm/test/Transforms/SLPVectorizer/X86/full-match-with-poison-scalar.ll
    M llvm/test/Transforms/SLPVectorizer/X86/node-outside-used-only.ll
    M llvm/test/Transforms/SLPVectorizer/X86/non-schedulable-instructions-become-schedulable.ll
    M llvm/test/Transforms/SLPVectorizer/X86/pr47642.ll
    M llvm/test/Transforms/SLPVectorizer/X86/revec-reduced-value-vectorized-later.ll
    M llvm/test/Transforms/SLPVectorizer/alternate-non-profitable.ll

  Log Message:
  -----------
  [SLP]Initial support for copyable elements (non-schedulable only)

Adds initial support for copyable elements. This patch only models adds
and model copyable elements as add <element>, 0, i.e. uses identity
constants for missing lanes.
Only support for elements, which do not require scheduling, is added to
reduce size of the patch.

Fixed compile time regressions, updated release notes

Reviewers: RKSimon, hiraditya

Reviewed By: RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/140279



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