[gcc(refs/users/meissner/heads/dmf001)] Add Dwarf support for DMR registers.

[gcc(refs/users/meissner/heads/dmf001)] Add Dwarf support for DMR registers.

[Michael Meissner]

https://gcc.gnu.org/g:7cad3ad426b400fd3207f63cebf53f694a98dc3c

commit 7cad3ad426b400fd3207f63cebf53f694a98dc3c
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Tue Oct 18 23:51:26 2022 -0400

    Add Dwarf support for DMR registers.
    
    2022-10-18   Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            * 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, 6 insertions(+), 1 deletion(-)

diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 9d5d1ce1930..9b9fa75d8ba 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -22724,7 +22724,8 @@ 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 = 4 + rs6000_register_move_cost (mode, rclass, VSX_REGS);
+    ret = (rs6000_dmf_register_move_cost (mode, VSX_REGS)
+	   + rs6000_memory_move_cost (mode, VSX_REGS, false));
   else
     ret = 4 + rs6000_register_move_cost (mode, rclass, GENERAL_REGS);
 
@@ -24099,6 +24100,10 @@ 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 ();
 }