(casesi_2): Operand 0 is HImode; add SIGN_EXTEND when adding to pc.

(casesi): Operand 0 is HImode.
(unnamed PC addition pattern): Add SIGN_EXTEND to add HImode offset to
SImode PC.

From-SVN: r7937

gcc/config/fx80/fx80.md

@@ -2238,11 +2238,11 @@
   "")
 
 (define_expand "casesi_2"
-  [(set (match_operand:SI 0 "" "") (mem:HI (match_operand:SI 1 "" "")))
+  [(set (match_operand:HI 0 "" "") (mem:HI (match_operand:SI 1 "" "")))
    ;; The USE here is so that at least one jump-insn will refer to the label,
    ;; to keep it alive in jump_optimize.
    (parallel [(set (pc)
-		   (plus:SI (pc) (match_dup 0)))
+		   (plus:SI (pc) (sign_extend:SI (match_dup 0))))
 	      (use (label_ref (match_operand 2 "" "")))])]
   ""
   "")
@@ -2253,7 +2253,7 @@
 (define_expand "casesi"
   ;; We don't use these for generating the RTL, but we must describe
   ;; the operands here.
-  [(match_operand:SI 0 "general_operand" "")
+  [(match_operand:HI 0 "general_operand" "")
    (match_operand:SI 1 "immediate_operand" "")
    (match_operand:SI 2 "general_operand" "")
    (match_operand 3 "" "")
@@ -2285,7 +2285,8 @@
 ;; Recognize one of the insns resulting from casesi_2.
 (define_insn ""
   [(set (pc)
-	(plus:SI (pc) (match_operand:HI 0 "general_operand" "r")))
+	(plus:SI (pc)
+		 (sign_extend:SI (match_operand:HI 0 "general_operand" "r"))))
    (use (label_ref (match_operand 1 "" "")))]
   ""
   "*