Am 16.01.20 um 10:36 schrieb Henri Cloetens:
Hello all,
I am starting to work on GCC backend development. I have some issues
right now,
if any of you could help me on that.
1. I managed to compile my backend, and run a simple program through it.
However,
- It is using a frame pointer. (It does not eliminate it.)
Maybe some elimination rules missing?
https://gcc.gnu.org/onlinedocs/gccint/Elimination.html
- Arguments of functions are declared in registers, but at the start
of the subroutine,
it puts the arguments on the stack.
You compiled with optimization turned on? Or taking addresses of
parameters? We can only guess here.
- I think it is related with DWARF2 debug format, I tried to disable
it, but could not find it.
2. Is there a way to get verbose messages out of the compiler, to help
during debug ?.
You can -fdump-rtl-all (or -da) and check if stuff is expanded and
transformed as expected during the RTL passes. There are more fine
grained add additional flags apart from -all
https://gcc.gnu.org/onlinedocs/gcc/Developer-Options.html
Johann
3. Is there some manual/description on how to run the compiler
verification suites ?.
Best Regards,
Henri.
