rs6000.c (rs6000_stack_info): Fix caching of SPE 64-bit register usage.

	* config/rs6000/rs6000.c (rs6000_stack_info): Fix caching of SPE
	64-bit register usage.
	(spe_func_has_64bit_regs_p): Add FIXME note.

[[Split portion of a mixed commit.]]

From-SVN: r93648.2

gcc/ChangeLog

 2005-01-14  Aldy Hernandez  <aldyh@redhat.com>
 
+	* config/rs6000/rs6000.c (rs6000_stack_info): Fix caching of SPE
+	64-bit register usage.
+	(spe_func_has_64bit_regs_p): Add FIXME note.
+
+2005-01-14  Aldy Hernandez  <aldyh@redhat.com>
+
 	* config/rs6000/rs6000.c (rs6000_generate_compare): Replace
 	flag_finite_math_only with flag_unsafe_math_optimizations.
 

gcc/config/rs6000/rs6000.c

@@ -12621,10 +12621,9 @@ rs6000_stack_info (void)
     {
       /* Cache value so we don't rescan instruction chain over and over.  */
       if (cfun->machine->insn_chain_scanned_p == 0)
-	{
-	  cfun->machine->insn_chain_scanned_p = 1;
-	  info_ptr->spe_64bit_regs_used = (int) spe_func_has_64bit_regs_p ();
-	}
+	cfun->machine->insn_chain_scanned_p
+	  = spe_func_has_64bit_regs_p () + 1;
+      info_ptr->spe_64bit_regs_used = cfun->machine->insn_chain_scanned_p - 1;
     }
 
   /* Select which calling sequence.  */
@@ -12933,6 +12932,13 @@ spe_func_has_64bit_regs_p (void)
 	{
 	  rtx i;
 
+	  /* FIXME: This should be implemented with attributes...
+
+	         (set_attr "spe64" "true")....then,
+	         if (get_spe64(insn)) return true;
+
+	     It's the only reliable way to do the stuff below.  */
+
 	  i = PATTERN (insn);
 	  if (GET_CODE (i) == SET)
 	    {