[dataflow]: PATCH: fix regressions on x86_64

[Seongbae Park]

This fixes the regression on x86-64.
Bootstrapped on x86-64.

Seongbae

2006-11-14  Seongbae Park <seongbae.park@gmail.com>

        * function.c (thread_prologue_and_epilogue_insns):
        Update regs_ever_live during df scanning.
-------------- next part --------------
Index: gcc/function.c
===================================================================
--- gcc/function.c	(revision 118828)
+++ gcc/function.c	(working copy)
@@ -5093,7 +5093,7 @@ thread_prologue_and_epilogue_insns (void
 #endif
   edge_iterator ei;
 
-  prologue_epilogue_df = df_init (0, DF_NO_REGS_EVER_LIVE);
+  prologue_epilogue_df = df_init (0, 0);
   /* Do not even think about running dce here!!!!  All life, as we
      know it will cease!!!  There is dead code created by the previous
      call to split_all_insns that is resurrected by the prologue and
@@ -5136,7 +5136,6 @@ thread_prologue_and_epilogue_insns (void
       inserted = 1;
     }
 #endif
-   df_compute_regs_ever_live (prologue_epilogue_df, regs_ever_live);
 
   /* If the exit block has no non-fake predecessors, we don't need
      an epilogue.  */