flow.c (flow_delete_insn, [...]): Export.

        * flow.c (flow_delete_insn, make_edge, remove_edge): Export.
        * basic-block.h: Declare them.
        * emit-rtl.h (active_insn_p): New.
        (next_active_insn, prev_active_insn): Use it.
        * rtl.h: Declare it.
        * function.c (emit_return_into_block): New.
        (thread_prologue_and_epilogue_insns): Insert return insns instead
        of epilogues when possible.
        * jump.c (jump_optimize_1): Remove code to insert a return insn
        on the fallthru to the exit block.

From-SVN: r31826

1 files changed, 0 insertions, 39 deletions

diff --git a/gcc/jump.c b/gcc/jump.c
index ad213bc..417425d 100644
--- a/gcc/jump.c
+++ b/gcc/jump.c
@@ -232,25 +232,6 @@ jump_optimize_1 (f, cross_jump, noop_moves, after_regscan, mark_labels_only)
 
   last_insn = delete_unreferenced_labels (f);
 
-#ifdef HAVE_return
-  if (optimize && HAVE_return)
-    {
-      /* If we fall through to the epilogue, see if we can insert a RETURN insn
-	 in front of it.  If the machine allows it at this point (we might be
-	 after reload for a leaf routine), it will improve optimization for it
-	 to be there.  */
-      insn = get_last_insn ();
-      while (insn && GET_CODE (insn) == NOTE)
-	insn = PREV_INSN (insn);
-
-      if (insn && GET_CODE (insn) != BARRIER)
-	{
-	  emit_jump_insn (gen_return ());
-	  emit_barrier ();
-	}
-    }
-#endif
-
   if (noop_moves)
     delete_noop_moves (f);
 
@@ -2142,26 +2123,6 @@ jump_optimize_1 (f, cross_jump, noop_moves, after_regscan, mark_labels_only)
 	}
   }
 
-#ifdef HAVE_return
-  if (HAVE_return)
-    {
-      /* If we fall through to the epilogue, see if we can insert a RETURN insn
-	 in front of it.  If the machine allows it at this point (we might be
-	 after reload for a leaf routine), it will improve optimization for it
-	 to be there.  We do this both here and at the start of this pass since
-	 the RETURN might have been deleted by some of our optimizations.  */
-      insn = get_last_insn ();
-      while (insn && GET_CODE (insn) == NOTE)
-	insn = PREV_INSN (insn);
-
-      if (insn && GET_CODE (insn) != BARRIER)
-	{
-	  emit_jump_insn (gen_return ());
-	  emit_barrier ();
-	}
-    }
-#endif
-
   /* CAN_REACH_END is persistent for each function.  Once set it should
      not be cleared.  This is especially true for the case where we
      delete the NOTE_FUNCTION_END note.  CAN_REACH_END is cleared by