re PR rtl-optimization/32790 (REG_N_SETS holds wrong value)

	PR rtl-optimization/32790
        * reginfo.c (reg_scan_mark_refs): Look for ZERO_EXTRACT,
        not ZERO_EXTEND in SET_DESTs.

From-SVN: r219795

gcc/ChangeLog

+2015-01-17  Jeff Law  <law@redhat.com>
+
+	PR rtl-optimization/32790
+	* reginfo.c (reg_scan_mark_refs): Look for ZERO_EXTRACT,
+	not ZERO_EXTEND in SET_DESTs.
+
 2015-01-17  Alan Modra  <amodra@gmail.com>
 
 	* cprop.c (do_local_cprop): Revert last change.

gcc/reginfo.c

@@ -1132,7 +1132,7 @@ reg_scan_mark_refs (rtx x, rtx_insn *insn)
       /* Count a set of the destination if it is a register.  */
       for (dest = SET_DEST (x);
 	   GET_CODE (dest) == SUBREG || GET_CODE (dest) == STRICT_LOW_PART
-	   || GET_CODE (dest) == ZERO_EXTEND;
+	   || GET_CODE (dest) == ZERO_EXTRACT;
 	   dest = XEXP (dest, 0))
 	;