[PATCH] libgccjit: Add support for `restrict` attribute on function parameters

[David Malcolm]

On Tue, 2023-08-29 at 17:15 +0200, Guillaume Gomez wrote:
> We finished the investigation and found out the issue: when passing
> arguments by value to functions, rustc still provides "NoAlias" as
> attribute to the argument whereas it should never be passed in this
> case. Luckily for us, in case the argument is a function pointer
> coming from a struct field, it crashes GCC, which is what allowed us
> to figure out about this. A code which reproduces this bug:

[...snip...]

> So in short: the patch in the previous mail which added this check:
> 
> ```
> RETURN_NULL_IF_FAIL (type->is_pointer (), NULL, NULL, "not a pointer
> type");
> ```
> 
> is correct and ready. 

Thanks.  I've gone ahead and pushed it to gcc trunk for you as r14-
3552-g29763b002459cb.

[...snip...]

Dave