Hello.

Ian Lance Taylor writes:
> Anatoly Sokolov <aesok@post.ru> writes:
>>
>>   * For an interrupt function it is safety to use only call-used registers
>>   which are saved in prologue. In 'rename_registers' optimization pass this
>>   check is done in HARD_REGNO_RENAME_OK macro. This patch add
>>   HARD_REGNO_SCRATCH_OK macro for 'peephole2' pass. The
>>   HARD_REGNO_SCRATCH_OK macro sould be difined for target which use interrupt
>>   and 'match_scratch' in peephole2 (avr, m68k).
> 
> Please make a new target hook instead (I know that the existing
> HARD_REGNO_RENAME_OK is still a macro).  Thanks.

Andy H writes:
> Typo:
>
>default_hard_regno_scrath_ok
>
>default_hard_regno_scratch_ok

Thanks You, Andy.

2008-06-19  Anatoly Sokolov  <aesok@post.ru>

        * target.h (struct gcc_target): Add hard_regno_scratch_ok field.
        * target-def.h (TARGET_HARD_REGNO_SCRATCH_OK): New.
        (TARGET_INITIALIZER): Use TARGET_HARD_REGNO_SCRATCH_OK.
        * targhooks.c (default_hard_regno_scratch_ok): New function.
        * targhooks.h (default_hard_regno_scratch_ok): Declare function.
        * doc/tm.texi: Document TARGET_HARD_REGNO_SCRATCH_OK hook.
        * recog.c (peep2_find_free_register): Add check for global regs. 
         Add target specific check.
 
Anatoly.