Am 15.08.23 um 14:06 schrieb Richard Biener via Gcc:
On Tue, Aug 15, 2023 at 1:38 PM MegaIng via Gcc <gcc@gcc.gnu.org> wrote:
Also, on another backend I saw comments relating to libgcc (or newlib?)
not working that well on systems where int is 16bit. Is that still true,
and what is the best workaround?
You could look into the AVR port for example. I think libgcc should
work reasonably well here. [...]
The trouble with avr-gcc was that it suffered from "spill fail"
internal compiler errors from the register allocator when building
Newlib. The bug was never fixed (like many problems for ternary
targets like AVR).
Outcome was that RTEMS (which uses Newlib) dropped support for AVR.
Apart from that, I cannot recommend reading the AVR backend.
It is cluttered up with hacks and FIXMEs that work around problems
in the middle-end, so it is no good read.
Johann
Richard.
Many thanks in advance,
MegaIng
