https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111131
Bug ID: 111131
Summary: SLP of gathers incomplete
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
SLP of gathers relies on vect_recog_gather_scatter_pattern but for example
x86 still uses the decl based target hook. There's also open-coded
gather/scatter support which isn't handled by SLP either.
The "correct" way is probably to use vect_check_gather_scatter at SLP
build time.
This can for example be seen when trying to vectorize
gcc.dg/vect/tsvc/vect-tsvc-vag.c with single-lane SLP, but
gcc.dg/vect/vect-gather-*.c also FAIL without vect_gather_load_ifn.
