re PR target/31480 (ICE with -O -fomit-frame-pointer on SH)

	PR target/31480
	* config/sh/sh.md (length): Check if prev_nonnote_insn (insn)
	is null.

From-SVN: r124031

gcc/ChangeLog

+2007-04-21  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/31480
+	* config/sh/sh.md (length): Check if prev_nonnote_insn (insn)
+	is null.
+
 2007-04-21  Andrew Pinski  <andrew_pinski@playstation.sony.com>
 
 	* timevar.c (timevar_print): Change reference of --disable-checking to

gcc/config/sh/sh.md

@@ -420,10 +420,12 @@
 	 (eq_attr "type" "jump")
 	 (cond [(eq_attr "med_branch_p" "yes")
 		(const_int 2)
-		(and (eq (symbol_ref "GET_CODE (prev_nonnote_insn (insn))")
-                         (symbol_ref "INSN"))
-                     (eq (symbol_ref "INSN_CODE (prev_nonnote_insn (insn))")
-                         (symbol_ref "code_for_indirect_jump_scratch")))
+		(and (ne (symbol_ref "prev_nonnote_insn (insn)")
+			 (const_int 0))
+		     (and (eq (symbol_ref "GET_CODE (prev_nonnote_insn (insn))")
+			      (symbol_ref "INSN"))
+			  (eq (symbol_ref "INSN_CODE (prev_nonnote_insn (insn))")
+			      (symbol_ref "code_for_indirect_jump_scratch"))))
                 (cond [(eq_attr "braf_branch_p" "yes")
                        (const_int 6)
                        (eq (symbol_ref "flag_pic") (const_int 0))