PR63442 libgcc_cmp_return_mode not always return word_mode

gcc/
  PR target/63442
  * optabs.c (prepare_cmp_insn): Use "ret_mode" instead of "word_mode".

From-SVN: r216765

gcc/ChangeLog

+2014-10-27  Jiong Wang <jiong.wang@arm.com>
+
+	PR target/63442
+	* optabs.c (prepare_cmp_insn): Use "ret_mode" instead of "word_mode".
+
 2014-10-27  DJ Delorie  <dj@redhat.com>
 
 	* tree.c (build_common_tree_nodes): Don't even store the

gcc/optabs.c

@@ -4294,7 +4294,7 @@ prepare_cmp_insn (rtx x, rtx y, enum rtx_code comparison, rtx size,
 	    y = const0_rtx;
 	}
 
-      *pmode = word_mode;
+      *pmode = ret_mode;
       prepare_cmp_insn (x, y, comparison, NULL_RTX, unsignedp, methods,
 			ptest, pmode);
     }