On 11/11/24 5:16 AM, Richard Biener wrote:
The following enables targets to suggest the vector mode to be used
preferably for the epilogue of a vectorized loop. The patch also
enables more than one vectorized epilogue in case the target suggests
a vector mode for the epilogue of a vector epilogue.
Bootstrapped and tested on x86_64-unknown-linux-gnu.
As you can see without target cost modeling you cannot get more
than one vectorized epilogue (I've dropped the --param
vect-epilogues-nomask=N approach for now). In case the target
prefers a specific epilogue mode but that turns out to not
vectorize we continue iterating, searching for an alternative mode.
Any objections?
Thanks,
Richard.
* tree-vectorizer.h (vector_costs::suggested_epilogue_mode): New.
(vector_costs::m_suggested_epilogue_mode): Likewise.
(vector_costs::vector_costs): Initialize m_suggested_epilogue_mode.
* tree-vect-loop.cc (vect_analyze_loop): Honor the target
suggested prefered epilogue mode and support vector epilogues
of vector epilogues if requested.
No objection from me.
jeff
