Re: [sdcc-devel] LTO I have done in recent 4 months

[Philipp K. K. <pk...@sp...>]

Am 16.08.24 um 11:10 schrieb 月明风清 via sdcc-devel:
>
> Acording to my work requirement, a small 8-bit mcu with 9bit RAM addr
> 13bit ROM addr，without banking.
> I use SDCC and  gputils for it. I have tried a lot of.
> Recently, I did 2 LTO pass in gputils's linker:
> 1) remove unused global variable (initialized or uninitialized).
> 2) Reuse temporary ram variable accross different functions.
> In this pass , I  construct the call-graph with main、intterrupt0、
> interrupt1 as the root. when two functions are in one call-graph, they
> can share compiler allocated global ram variables.
> Great, it works.

Sounds useful, though the SDCC pic ports are unmaintained. Did you
submit your work to upstream gputils, e.g. via
https://sourceforge.net/p/gputils/patches/?

Philipp