Re: [PATCH] Speed up for_each_rtx

[Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>]

> Interesting approach.  Since non_rtx_starting_operands is in fact a
> compile time constant, this suggests the approach of writing a genrtl
> program which writes out an optimized for_each_rtx function.  The
> optimized function would never call GET_RTX_FORMAT and would never
> loop (except over vectors).  Instead it would switch on GET_CODE and
> have direct calls for the operands specific to that code.

Thanks for the idea... Something to chew in 4.1 -- I won't hide that I'm 
more comfortable with the small rtlanal.c that is going in.  Even though 
I liked the FOR_EACH_RTX syntax and idea, this approach also has the 
advantage of smaller code size.

Paolo