re PR debug/49262 (3-yr-old infinite loop in dwarf2out.c)

	PR debug/49262
	* dwarf2out.c (native_encode_initializer): Decrement count in each
	iteration.

From-SVN: r174715

gcc/ChangeLog

 2011-06-06  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/49262
+	* dwarf2out.c (native_encode_initializer): Decrement count in each
+	iteration.
+
 	PR debug/49294
 	* dwarf2out.c (mem_loc_descriptor) <do_shift>: Give up for
 	non-MODE_INT modes.

gcc/dwarf2out.c

@@ -18065,7 +18065,7 @@ native_encode_initializer (tree init, unsigned char *array, int size)
 		{
 		  int count = tree_low_cst (TREE_OPERAND (index, 1), 0)
 			      - tree_low_cst (TREE_OPERAND (index, 0), 0);
-		  while (count > 0)
+		  while (count-- > 0)
 		    {
 		      if (val)
 			memcpy (array + curpos, array + pos, fieldsize);