genextract.c (print_path): Handle zero-length path as a special case.

From-SVN: r19947

gcc/ChangeLog

@@ -1,3 +1,8 @@
+Fri May 22 03:42:05 1998  Richard Earnshaw (rearnsha@arm.com)
+
+	* genextract.c (print_path): Handle zero-length path as a special 
+	case.
+
 Fri May 22 01:38:07 1998  Hans-Peter Nilsson  <hp@axis.se>
 
 	* cplus-dem.c (MBUF_SIZE): Bumped from 512 to 32767.

gcc/genextract.c

@@ -318,6 +318,14 @@ print_path (path)
   register int len = strlen (path);
   register int i;
 
+  if (len == 0)
+    {
+      /* Don't emit "pat", since we may try to take the address of it,
+	 which isn't what is intended.  */
+      printf("PATTERN (insn)");
+      return;
+    }
+
   /* We first write out the operations (XEXP or XVECEXP) in reverse
      order, then write "insn", then the indices in forward order.  */