rtl.h (recompute_reg_usage): Add second argument.

	* rtl.h (recompute_reg_usage): Add second argument.
	* flow.c (recompute_reg_usage): Likewise.
	* toplev.c (rest_of_compilation): Supply second argument to
	recompute_reg_usage.

From-SVN: r24291

gcc/ChangeLog

@@ -4,6 +4,11 @@
 
 Sun Dec 13 00:24:14 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
 
+	* rtl.h (recompute_reg_usage): Add second argument.
+	* flow.c (recompute_reg_usage): Likewise.
+	* toplev.c (rest_of_compilation): Supply second argument to
+	recompute_reg_usage.
+
 	* reload1.c (compute_use_by_pseudos): Allow reg_renumber[regno] < 0
 	after reload.
 

gcc/flow.c

@@ -4267,12 +4267,18 @@ count_reg_references (x)
    register allocators to prioritize pseudos for allocation to hard regs.
    More accurate reference counts generally lead to better register allocation.
 
+   F is the first insn to be scanned.
+   LOOP_STEP denotes how much loop_depth should be incremented per
+   loop nesting level in order to increase the ref count more for references
+   in a loop.
+
    It might be worthwhile to update REG_LIVE_LENGTH, REG_BASIC_BLOCK and
    possibly other information which is used by the register allocators.  */
 
 void
-recompute_reg_usage (f)
+recompute_reg_usage (f, loop_step)
      rtx f;
+     int loop_step;
 {
   rtx insn;
   int i, max_reg;
@@ -4295,9 +4301,9 @@ recompute_reg_usage (f)
 	{
 	  /* Look for loop boundaries.  */
 	  if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END)
-	    loop_depth--;
+	    loop_depth -= loop_step;
 	  else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG)
-	    loop_depth++;
+	    loop_depth += loop_step;
 
 	  /* If we have LOOP_DEPTH == 0, there has been a bookkeeping error. 
 	     Abort now rather than setting register status incorrectly.  */

gcc/rtl.h

@@ -1394,7 +1394,7 @@ extern void stupid_life_analysis	PROTO ((rtx, int, FILE *));
 
 /* In flow.c */
 extern void allocate_for_life_analysis	PROTO ((void));
-extern void recompute_reg_usage		PROTO ((rtx));
+extern void recompute_reg_usage		PROTO ((rtx, int));
 #ifdef BUFSIZ
 extern void dump_flow_info		PROTO ((FILE *));
 #endif

gcc/toplev.c

@@ -3929,7 +3929,7 @@ rest_of_compilation (decl)
   if (!obey_regdecls)
     TIMEVAR (local_alloc_time,
 	     {
-	       recompute_reg_usage (insns);
+	       recompute_reg_usage (insns, ! optimize_size);
 	       regclass (insns, max_reg_num ());
 	       local_alloc ();
 	     });