params.def (PARAM_MAX_VARTRACK_EXPR_DEPTH): Bump default to 10.

* params.def (PARAM_MAX_VARTRACK_EXPR_DEPTH): Bump default to 10.
* var-tracking.c (reverse_op): Limite recurse depth to 5.

From-SVN: r174596

gcc/ChangeLog

 2011-06-02  Alexandre Oliva  <aoliva@redhat.com>
 
+	* params.def (PARAM_MAX_VARTRACK_EXPR_DEPTH): Bump default to 10.
+	* var-tracking.c (reverse_op): Limite recurse depth to 5.
+
+2011-06-02  Alexandre Oliva  <aoliva@redhat.com>
+
 	PR debug/47590
 	* target.def (delay_sched2, delay_vartrack): New.
 	* doc/tm.texi.in: Update.

gcc/params.def

@@ -845,7 +845,7 @@ DEFPARAM (PARAM_MAX_VARTRACK_SIZE,
 DEFPARAM (PARAM_MAX_VARTRACK_EXPR_DEPTH,
 	  "max-vartrack-expr-depth",
 	  "Max. recursion depth for expanding var tracking expressions",
-	  10, 0, 0)
+	  20, 0, 0)
 
 /* Set minimum insn uid for non-debug insns.  */
 

gcc/var-tracking.c

@@ -5290,7 +5290,7 @@ reverse_op (rtx val, const_rtx expr)
       arg = XEXP (src, 1);
       if (!CONST_INT_P (arg) && GET_CODE (arg) != SYMBOL_REF)
 	{
-	  arg = cselib_expand_value_rtx (arg, scratch_regs, EXPR_DEPTH);
+	  arg = cselib_expand_value_rtx (arg, scratch_regs, 5);
 	  if (arg == NULL_RTX)
 	    return NULL_RTX;
 	  if (!CONST_INT_P (arg) && GET_CODE (arg) != SYMBOL_REF)