bb-reorder.c (reorder_basic_blocks): Update PREV_INSN as well as NEXT_INSN.

	* bb-reorder.c (reorder_basic_blocks): Update PREV_INSN as well as
	NEXT_INSN. Update last insn in chain.

From-SVN: r32623

gcc/ChangeLog

+Sat Mar 18 14:38:00 2000  Jason Eckhardt  <jle@cygnus.com>
+
+	* bb-reorder.c (reorder_basic_blocks): Update PREV_INSN as well as
+	NEXT_INSN. Update last insn in chain.
+
 2000-03-17  Jason Merrill  <jason@casey.cygnus.com>
 
 	* dwarf2out.c (dwarf2out_decl): Don't emit anything for types

gcc/bb-reorder.c

@@ -765,7 +765,17 @@ reorder_basic_blocks ()
       rtx xafter = skip_insns_between_block (BASIC_BLOCK (n_basic_blocks - 1),
 					     REORDER_SKIP_AFTER);
       if (xafter)
-	NEXT_INSN (xafter) = last_insn;
+	{
+	  NEXT_INSN (xafter) = last_insn;
+	  if (last_insn)
+	    {
+	      rtx x = last_insn;
+	      PREV_INSN (last_insn) = xafter;
+	      while (NEXT_INSN (x))
+		x = NEXT_INSN (x);
+	      set_last_insn (x);
+	    }
+	}
       else
 	abort();
     }