Re: [Tinycc-devel] tcc grammar problems

[Thomas Preud'homme]

Le dimanche 13 juillet 2014, 22:12:39 jiang a écrit :
> Hello everyone!
> 
> (s->a = (s->b = (s->c = n + 4)));
> 
> 
> gcc & msvc:
> --> 30 / 30 / 126 // Because the return value is left
> 
> 
> tcc
> --> 254 / 30 / 126 // Because the return is the right value

Since it works for the last two values I don't think it's that. It simply 
looks like tcc compute n + 4 (254) and then tries to store it in each field 
independently. It's a folding issue. Tcc records 254 in a CValue associated 
with the SValue for n + 4. The problem is how this is propagated (folded) to 
the three field access.

> 
> Shall tcc assignment modify what? Same with gcc&msvc.

Yes, gcc and msvc are definitely right here.

Best regards,

Thomas

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