[Bug target/121471] New: arm: mcrr2 and mrrc2 were obsolted in arm8-a

[rearnsha at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121471

            Bug ID: 121471
           Summary: arm: mcrr2 and mrrc2 were obsolted in arm8-a
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rearnsha at gcc dot gnu.org
  Target Milestone: ---

The Armv8-a Arm ARM removes all references to mcrr2 and mrrc2, so the
intrinsics that expand to these instructions should be rejected when compiled
with -march=armv8-a

eg:

#include <arm_acle.h>
void f()
{
        __arm_mcrr2 (0, 0, 0, 0);
}