re PR target/43742 (web.c/union_match_dups segfaults for a null *ref on sh-elf)

	PR target/43742
	* config/sh/sh.md (doloop_end_split): Remove "+r" constraint
	in an input-only operand.

From-SVN: r158361

gcc/ChangeLog

+2010-04-15  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/43742
+	* config/sh/sh.md (doloop_end_split): Remove "+r" constraint
+	in an input-only operand.	
+
 2010-04-15  Anatoly Sokolov  <aesok@post.ru>
 
 	* double-int.h (HOST_BITS_PER_DOUBLE_INT): Define.

gcc/config/sh/sh.md

@@ -7050,7 +7050,7 @@ label:
 
 (define_insn_and_split "doloop_end_split"
   [(set (pc)
-	(if_then_else (ne:SI (match_operand:SI 0 "arith_reg_dest" "+r")
+	(if_then_else (ne:SI (match_operand:SI 0 "arith_reg_dest" "")
 			  (const_int 1))
 		      (label_ref (match_operand 1 "" ""))
 		      (pc)))