Hi,

This patch adds support for the widening LDAPR instructions.

Bootstrapped and regression tested on aarch64-none-linux-gnu.

OK for trunk?

2022-11-09  Andre Vieira  <andre.simoesdiasvieira@arm.com>
             Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

gcc/ChangeLog:

         * config/aarch64/atomics.md 
(*aarch64_atomic_load<ALLX:mode>_rcpc_zext): New pattern.
         (*aarch64_atomic_load<ALLX:mode>_rcpc_zext): Likewise.

gcc/testsuite/ChangeLog:

         * gcc.target/aarch64/ldapr-ext.c: New test.