[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@amd.com>
llvm-project
32f3f9df - [SLP][NFC] Pre-commit tests for select IR-flag/metadata propagation (#208150)
