[Bug target/59549] [SH] __builtin_return_address causes push/pop of PR

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59549

--- Comment #2 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Ran over the following in sh.c, maybe it's related:

      /* For Shcompact, if not optimizing, we end up with a memory reference
         using the return address pointer for __builtin_return_address even
         though there is no actual need to put the PR register on the stack. 
*/
      pr_live |= df_regs_ever_live_p (RETURN_ADDRESS_POINTER_REGNUM);
    }
  /* Force PR to be live if the prologue has to call the SHmedia
     argument decoder or register saver.  */
  has_call = pr_live;