re PR debug/41371 (var-tracking is slow and memory hungry)

	PR debug/41371
	* var-tracking.c (find_loc_in_1pdv): Add a few checks from
	rtx_equal_p inline.

From-SVN: r159528

gcc/ChangeLog

+2010-05-18  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/41371
+	* var-tracking.c (find_loc_in_1pdv): Add a few checks from
+	rtx_equal_p inline.
+
 2010-05-18  Steven Bosscher  <steven@gcc.gnu.org>
 
 	* config.gcc (powerpc-*-darwin*, powerpc64-*-darwin*): Add

gcc/var-tracking.c

@@ -2484,6 +2484,7 @@ static location_chain
 find_loc_in_1pdv (rtx loc, variable var, htab_t vars)
 {
   location_chain node;
+  enum rtx_code loc_code;
 
   if (!var)
     return NULL;
@@ -2495,11 +2496,23 @@ find_loc_in_1pdv (rtx loc, variable var, htab_t vars)
 
   gcc_assert (var->var_part[0].offset == 0);
 
+  loc_code = GET_CODE (loc);
   for (node = var->var_part[0].loc_chain; node; node = node->next)
+    {
+      if (GET_CODE (node->loc) != loc_code)
+	{
+	  if (GET_CODE (node->loc) != VALUE)
+	    continue;
+	}
+      else if (loc == node->loc)
+	return node;
+      else if (loc_code != VALUE)
+	{
 	  if (rtx_equal_p (loc, node->loc))
 	    return node;
-    else if (GET_CODE (node->loc) == VALUE
-	     && !VALUE_RECURSED_INTO (node->loc))
+	  continue;
+	}
+      if (!VALUE_RECURSED_INTO (node->loc))
 	{
 	  decl_or_value dv = dv_from_value (node->loc);
 	  variable var = (variable)
@@ -2517,6 +2530,7 @@ find_loc_in_1pdv (rtx loc, variable var, htab_t vars)
 	      VALUE_RECURSED_INTO (node->loc) = false;
 	    }
 	}
+    }
 
   return NULL;
 }