new patch for dataflow branch

[Kenneth Zadeck <zadeck at naturalbridge dot com>]

This patch fixes all of the regression on the x86-64 and about half of 
the regressions on the x86-32 and many of the regressions on power-pc 
darwin (there are still two left).

I also clean up my changelog entry from my previous commit.

Kenny

2005-10-23  Daniel Berlin  <dberlin@dberlin.org>
           Kenneth Zadeck <zadeck@naturalbridge.com>

   * df.c (df_bitmaps_alloc, df_lr_local_compute, df_compute_all_blocks):
   Removed df->all_blocks.
   * df.c (df_lr_local_compute): Added flag to indicate that
   blocks was really the whole function.
   * df.c (df_ref_record): Fixed missing case for memory refs.
   * df.c (df_insn_refs_record): Fixed regs ever live processing.
   * df.c (df_bb_refs_record): Removed debugging code.
   * df.c (df_bb_lr_local_compute, notice_stack_pointer_modification,
   df_bb_lr_local_compute): Moved stack pointer modification
   detection code back to flow.c.
   * df.c (df_bb_lr_local_compute, hybrid_search_forward,
   hybrid_search_backward): Formatting cleanup.
   * df.c (df_compute_all_blocks, notice_stack_pointer_modification):
   Removed.
   * df.c (df_analyze):  Changed the definition of whole program to be all
   reachable blocks rather than all blocks.
   * df.c (df_analyze_subcfg, df_analyze_simple_change_some_blocks): Added
   parameter to df_lr_local_compute.
   * df.c (df_rtx_reg_replace): Fixed way it decided it was processing
   entire function.
   * df.h: Removed all_blocks from struct df definition.
   * flow.c (notice_stack_pointer_modification_1,
   notice_stack_pointer_modification): Added back.
   * flow.c (life_analysis): Added back call to
   notice_stack_pointer_modification.
   * flow.c (struct tree_opt_pass pass_life, rest_of_handle_flow2):
   Added debugging.
   * gcse.c (gcse_main, bypass_jumps): Additional places where we had 
missed
   in renumbering entry and exit blocks.
   * global.c (global_alloc): Additional debugging code.