> Am 17.12.2023 um 04:29 schrieb Jeff Law <j...@ventanamicro.com>:
>
>
> So mcore-elf is the slowest target to test with a simulator. Not because
> it's simulator is particularly bad, but because some tests timeout as they've
> gotten into infinite loops. This causes the mcore-elf port to take about 2X
> longer than most other gdbsim ports.
>
> I tracked this down to the port unconditionally adding -funsigned-bitfields
> to CC1_SPEC. According to the comment it's how the ABI is defined for the
> mcore targets.
>
> It'd be nice to get reasonable results from mcore-elf in a reasonable amount
> of time. The question is how.
>
> I *could* just disable the -funsigned-bitfields within the tester. We
> certainly have the ability to carry forward patches like this which exist
> only to help the testing effort.
>
> Another approach would be to add an explicit -fsigned-bifields to the
> arguments for the affected tests. I'd guess it's on the order of around 35
> distinct tests that would need to be updated.
>
> A third approach would be to grub around and see if there's a way to add a
> -fsigned-bitfields using dejagnu, perhaps in the baseboards file.
When the testcases are simply invalid with unsigned bitfields then I suggest to
add a dg effective target we could require? Or are the testcases actually
miscompiled?
I suppose neither -f[un]signed-bitfields is the standard behavior but bitfield
signedness is determined by the underlying type? Or is this flag about sth
else?
I could imagine a test needing the default behavior?
Richard
> Looking for suggestions/recommendations here.
>
> Jeff
