[gcc(refs/users/meissner/heads/dmf001)] Revert patch.

[Michael Meissner <meissner@gcc.gnu.org>]

https://gcc.gnu.org/g:5828134cccba61a2b79684ad333cea2eb54baddf

commit 5828134cccba61a2b79684ad333cea2eb54baddf
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Tue Oct 18 23:50:37 2022 -0400

    Revert patch.
    
    2022-10-18   Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            Revert patch.
            * config/rs6000/rs6000.cc (rs6000_memory_move_cost): Tweak last change.
            (rs6000_debugger_regno): Add support for DMF registers.

Diff:
---
 gcc/config/rs6000/rs6000.cc | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 9b9fa75d8ba..9d5d1ce1930 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -22724,8 +22724,7 @@ rs6000_memory_move_cost (machine_mode mode, reg_class_t rclass,
   else if (reg_classes_intersect_p (rclass, ALTIVEC_REGS))
     ret = 4 * hard_regno_nregs (FIRST_ALTIVEC_REGNO, mode);
   else if (reg_classes_intersect_p (rclass, DMF_REGS))
-    ret = (rs6000_dmf_register_move_cost (mode, VSX_REGS)
-	   + rs6000_memory_move_cost (mode, VSX_REGS, false));
+    ret = 4 + rs6000_register_move_cost (mode, rclass, VSX_REGS);
   else
     ret = 4 + rs6000_register_move_cost (mode, rclass, GENERAL_REGS);
 
@@ -24100,10 +24099,6 @@ rs6000_debugger_regno (unsigned int regno, unsigned int format)
     return 67;
   if (regno == 64)
     return 64;
-  /* XXX: This is a guess.  The GCC register number for FIRST_DMF_REGNO is 111,
-     but the frame pointer regnum above uses that.  */
-  if (DMF_REGNO_P (regno))
-    return regno - FIRST_DMF_REGNO + 112;
 
   gcc_unreachable ();
 }