[pushed][LRA]: Fix sparc bootstrap after recent patch for fp elimination for avr LRA port

[pushed][LRA]: Fix sparc bootstrap after recent patch for fp elimination for avr LRA port

[Vladimir Makarov]

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The following patch fixes sparc solaris bootstrap.  The explanation of 
the patch is in the commit message.

The patch was successfully bootstrap on x86-64, aarch64, and sparc64 
solaris.


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commit d17be8f7f36abe257a7d026dad61e5f8d14bdafc
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Fri Jul 21 20:28:50 2023 -0400

    [LRA]: Fix sparc bootstrap after recent patch for fp elimination for avr LRA port
    
    The recent patch for fp elimination for avr LRA port modified an assert
    which can be wrong for targets using hard frame pointer different from
    frame pointer.  Also for such ports spilling pseudos assigned to fp
    was wrong too in the new code.  Although this code is not used for any target
    currently using LRA except for avr.  Given patch fixes the issues.
    
    gcc/ChangeLog:
    
            * lra-eliminations.cc (update_reg_eliminate): Fix the assert.
            (lra_update_fp2sp_elimination): Use HARD_FRAME_POINTER_REGNUM
            instead of FRAME_POINTER_REGNUM to spill pseudos.

diff --git a/gcc/lra-eliminations.cc b/gcc/lra-eliminations.cc
index cf0aa94b69a..1f4e3fec9e0 100644
--- a/gcc/lra-eliminations.cc
+++ b/gcc/lra-eliminations.cc
@@ -1179,8 +1179,7 @@ update_reg_eliminate (bitmap insns_with_changed_offsets)
 	  gcc_assert (ep->to_rtx != stack_pointer_rtx
 		      || (ep->from == FRAME_POINTER_REGNUM
 			  && !elimination_fp2sp_occured_p)
-		      || (ep->from != FRAME_POINTER_REGNUM
-			  && ep->from < FIRST_PSEUDO_REGISTER
+		      || (ep->from < FIRST_PSEUDO_REGISTER
 			  && fixed_regs [ep->from]));
 
 	  /* Mark that is not eliminable anymore.  */
@@ -1398,7 +1397,7 @@ lra_update_fp2sp_elimination (void)
 	     "	   Frame pointer can not be eliminated anymore\n");
   frame_pointer_needed = true;
   CLEAR_HARD_REG_SET (set);
-  add_to_hard_reg_set (&set, Pmode, FRAME_POINTER_REGNUM);
+  add_to_hard_reg_set (&set, Pmode, HARD_FRAME_POINTER_REGNUM);
   spill_pseudos (set);
   for (ep = reg_eliminate; ep < &reg_eliminate[NUM_ELIMINABLE_REGS]; ep++)
     if (ep->from == FRAME_POINTER_REGNUM && ep->to == STACK_POINTER_REGNUM)