tree-ssa-dce.c (eliminate_unnecessary_stmts): Don't regard the removal of a…

tree-ssa-dce.c (eliminate_unnecessary_stmts): Don't regard the removal of a debug stmt as a significant change.

	* tree-ssa-dce.c (eliminate_unnecessary_stmts): Don't regard
	the removal of a debug stmt as a significant change.

From-SVN: r153007

gcc/ChangeLog

+2009-10-20  Alexandre Oliva  <aoliva@redhat.com>
+
+	* tree-ssa-dce.c (eliminate_unnecessary_stmts): Don't regard
+	the removal of a debug stmt as a significant change.
+
 2009-10-20  Wolfgang Gellerich  <gellerich@de.ibm.com>
 
 	* config/s390/s390.md: Added agen condition to operand

gcc/tree-ssa-dce.c

@@ -1129,8 +1129,9 @@ eliminate_unnecessary_stmts (void)
 	  /* If GSI is not necessary then remove it.  */
 	  if (!gimple_plf (stmt, STMT_NECESSARY))
 	    {
+	      if (!is_gimple_debug (stmt))
+		something_changed = true;
 	      remove_dead_stmt (&gsi, bb);
-	      something_changed = true;
 	    }
 	  else if (is_gimple_call (stmt))
 	    {