* lcm.c: Move all mode-switching related functions from here...

[pf3gnuchains/gcc-fork.git] / gcc / cfgrtl.c

diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c
index 3ceca75..2571d4d 100644 (file)
--- a/gcc/cfgrtl.c
+++ b/gcc/cfgrtl.c
@@ -59,11 +59,6 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include "target.h"
 #include "cfgloop.h"
 
-/* The labels mentioned in non-jump rtl.  Valid during find_basic_blocks.  */
-/* ??? Should probably be using LABEL_NUSES instead.  It would take a
-   bit of surgery to be able to use or co-opt the routines in jump.  */
-rtx label_value_list;
-
 static int can_delete_note_p (rtx);
 static int can_delete_label_p (rtx);
 static void commit_one_edge_insertion (edge, int);
@@ -103,8 +98,7 @@ can_delete_label_p (rtx label)
   return (!LABEL_PRESERVE_P (label)
          /* User declared labels must be preserved.  */
          && LABEL_NAME (label) == 0
-         && !in_expr_list_p (forced_labels, label)
-         && !in_expr_list_p (label_value_list, label));
+         && !in_expr_list_p (forced_labels, label));
 }
 
 /* Delete INSN by patching it out.  Return the next insn.  */
@@ -1190,7 +1184,7 @@ rtl_tidy_fallthru_edge (edge e)
 
   /* ??? In a late-running flow pass, other folks may have deleted basic
      blocks by nopping out blocks, leaving multiple BARRIERs between here
-     and the target label. They ought to be chastized and fixed.
+     and the target label. They ought to be chastised and fixed.
 
      We can also wind up with a sequence of undeletable labels between
      one block and the next.
@@ -2428,9 +2422,12 @@ purge_dead_edges (basic_block bb)
   if (!found)
     return purged;
 
+  /* Remove all but the fake and fallthru edges.  The fake edge may be
+     the only successor for this block in the case of noreturn
+     calls.  */
   for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); )
     {
-      if (!(e->flags & EDGE_FALLTHRU))
+      if (!(e->flags & (EDGE_FALLTHRU | EDGE_FAKE)))
        {
          bb->flags |= BB_DIRTY;
          remove_edge (e);