I'm fairly certain this warning was added because varying is the default specifier for types and can possibly confuse people new to the language. However it doesn't look like it's working as intended.
https://ispc.godbolt.org/z/76dajK It looks like pointer parameters on exported functions aren't automatically promoted varying. However pass by value types are. Cheers, Pete On Wed, Jan 13, 2021 at 3:22 PM Marianna Neubauer < [email protected]> wrote: > Hello, > > Since uniform pointers to varying types are permitted for an exported > function, I don't understand why this warrants a warning. What was the > motivation for adding this warning? > > Thank you, > Marianna > > On Monday, November 9, 2020 at 5:36:42 PM UTC-8 Deepak Rajendrakumaran > wrote: > >> Hello, >> >> Yes, this was an expected change - >> https://github.com/ispc/ispc/commit/761de37d076c64dbf8f74226a3b1f88fcb8fdc1e >> >> Functionally there is not change but a warning got added. You should >> still be able to compile and run your code, but it'll print the warning . >> 'Warning: Exported function parameter "ptr" points to varying type' merely >> lets the user know they are dealing with a varying type. >> >> -Deepak >> >> On Monday, November 9, 2020 at 2:33:16 PM UTC-8 [email protected] >> wrote: >> >>> >>> An exported function (at least up to 1.12) happily accepted parameters >>> of the form: >>> >>> varying TYPE * uniform ptr >>> >>> I am trying out 1.14.1 and get the following error: >>> >>> test.ispc:2:19: Warning: Exported >>> function parameter "ptr" points >>> to varying type >>> run(varying float * uniform ptr) >>> >>> From this code: >>> >>> export void >>> run(varying float * uniform ptr) >>> { >>> } >>> >>> The code compiles as expected at least up to 1.12. >>> >>> Is this an expected change? I didn't see anything about it in the >>> release notes. >>> >>> Cheers, >>> -Brian >>> >>> -- > You received this message because you are subscribed to the Google Groups > "Intel SPMD Program Compiler Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/ispc-users/3240f3c9-1fc2-462e-b3de-6f07ffc61a93n%40googlegroups.com > <https://groups.google.com/d/msgid/ispc-users/3240f3c9-1fc2-462e-b3de-6f07ffc61a93n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Intel SPMD Program Compiler Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/ispc-users/CAH0mFKAD4XqeHkVe_C0958oTeVo38ZZvQYHaGPL_u1vRWmJ5kQ%40mail.gmail.com.
