[Nouveau] [Bug 80266] Undefined operation in tgsi_ureg.c left shift of 1 by 31 places cannot be represented in type 'int'

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80266

--- Comment #8 from Vittorio <zeccav at gmail.com> ---
(In reply to comment #5)
> I'm not sure why you're filing these against nouveau... I'm sure there are
> _tons_ of these throughout mesa...
> 
> Does gcc warn about this? Are you _sure_ that (signed int)1 << 31 is illegal
> in C99?
Only now I am reading this note.
I compiled mesa with gcc -fsanitize=undefined option, gcc runtime is issuing
several, not tons, of runtime error messages, it seems to me that 
(signed int) 1 << 31 is undefined if computed as int.
The runtime error messages only appear with the -std=c99 option.

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