[PATCH] aarch64: PR target/99820: Guard on available SVE issue info before using

[Kyrylo Tkachov via Gcc-patches]

Hi all,

This fixes a simple segfault ICE when using the use_new_vector_costs tunable 
with a CPU tuning that it wasn't intended for.
I'm not adding a testcase here as we intend to remove the tunable for GCC 12 
anyway (the new costing logic will remain and will benefit
from this extra check, but the -moverride option will no longer exist).

Bootstrapped and tested on aarch64-none-linux-gnu.
Pushing to trunk.
Thanks,
Kyrill

gcc/ChangeLog:

        PR target/99820
        * config/aarch64/aarch64.c (aarch64_analyze_loop_vinfo): Check for
        available issue_info before using it.

nvcn.patch
Description: nvcn.patch