[DF] [performance] generate DF_REF_BASE REFs in REGNO order

[Kenneth Zadeck]

were these tested on any platform aside from x86?

On 07/29/2011 01:26 PM, Paolo Bonzini wrote:
> On 07/29/2011 07:23 PM, Dimitrios Apostolou wrote:
>>
>> 2011-07-29  Dimitrios Apostolou <jimis@gmx.net>
>>              Paolo Bonzini <bonzini@gnu.org>
>>
>>          (df_def_record_1): Assert a parallel must contain an 
>> EXPR_LIST at
>>      this point.  Receive the LOC and move its extraction...
>>          (df_defs_record): ... here. Rewrote logic with a switch 
>> statement
>>      instead of multiple if-else.
>>      (df_find_hard_reg_defs, df_find_hard_reg_defs_1): New functions
>>      that duplicate the logic of df_defs_record() and df_def_record_1()
>>      but without actually recording any DEFs, only marking them in
>>      the defs HARD_REG_SET.
>>      (df_get_call_refs): Call df_find_hard_reg_defs() to mark DEFs that
>>      are the result of the call. Record DF_REF_BASE DEFs in REGNO
>>      order. Use regs_invalidated_by_call HARD_REG_SET instead of
>>      regs_invalidated_by_call_regset bitmap.
>>      (df_insn_refs_collect): Record DF_REF_REGULAR DEFs after
>>      df_get_call_refs().
>
> Ok for mainline.  I will commit it for you after rebootstrapping (just 
> to be safe).
>
>> P.S. maraz: that's 4.3% improvement in instruction count, should you 
>> start worrying or is it too late?
>
> Now I'm curious!
>
> Paolo