[all-commits] [llvm/llvm-project] 32f3f9: [SLP][NFC] Pre-commit tests for select IR-flag/met...

[ayrai-gb via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 32f3f9dfce7ba9042ebfe7b42e72139454d29672
      https://github.com/llvm/llvm-project/commit/32f3f9dfce7ba9042ebfe7b42e72139454d29672
  Author: ayrai-gb <ayrai at amd.com>
  Date:   2026-07-13 (Mon, 13 Jul 2026)

  Changed paths:
    M llvm/test/Transforms/SLPVectorizer/X86/propagate_ir_flags.ll

  Log Message:
  -----------
  [SLP][NFC] Pre-commit tests for select IR-flag/metadata propagation (#208150)

Pre-commits regression tests for an upcoming SLPVectorizer fix (see
#207982). These IR shapes are currently vectorized by SLP, and the
vectorization is functionally correct but when a bundle of
scalar`select` instructions is vectorized, the resulting vector `select`
drops the fast-math flags (and other IR flags/metadata such as
`!unpredictable`) that were common to every scalar lane.

This NFC patch records the current (buggy) behavior so that the
follow-up fix's diff is limited to the behavioural change: `select_nnan`
currently loses `nnan` on the vectorized select, while
`select_not_all_nnan` (one lane missing `nnan`) correctly has none.

Co-authored-by: Ayush Rai <Ayush.Rai at amd.com>



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications