Strengthen return type of gen_label_rtx

2014-08-19  David Malcolm  <dmalcolm@redhat.com>

	* rtl.h (gen_label_rtx): Strengthen return type from rtx to
	rtx_code_label *.

	* emit-rtl.c (gen_label_rtx): Likewise.

From-SVN: r214179

gcc/ChangeLog

 2014-08-19  David Malcolm  <dmalcolm@redhat.com>
 
+	* rtl.h (gen_label_rtx): Strengthen return type from rtx to
+	rtx_code_label *.
+
+	* emit-rtl.c (gen_label_rtx): Likewise.
+
+2014-08-19  David Malcolm  <dmalcolm@redhat.com>
+
 	* rtl.h (previous_insn): Strengthen return type from rtx to
 	rtx_insn *.
 	(next_insn): Likewise.

gcc/emit-rtl.c

@@ -2473,11 +2473,12 @@ set_mem_attrs_for_spill (rtx mem)
 
 /* Return a newly created CODE_LABEL rtx with a unique label number.  */
 
-rtx
+rtx_code_label *
 gen_label_rtx (void)
 {
-  return gen_rtx_CODE_LABEL (VOIDmode, NULL_RTX, NULL_RTX,
-			     NULL, label_num++, NULL);
+  return as_a <rtx_code_label *> (
+	    gen_rtx_CODE_LABEL (VOIDmode, NULL_RTX, NULL_RTX,
+				NULL, label_num++, NULL));
 }
 
 /* For procedure integration.  */

gcc/rtl.h

@@ -2300,7 +2300,7 @@ extern rtx gen_reg_rtx (enum machine_mode);
 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
 extern rtx gen_reg_rtx_and_attrs (rtx);
-extern rtx gen_label_rtx (void);
+extern rtx_code_label *gen_label_rtx (void);
 extern rtx gen_lowpart_common (enum machine_mode, rtx);
 
 /* In cse.c */