Re: [Tinycc-devel] nocode_wanted does not work

[Michael Matz]

Hi,

On Sun, 3 Apr 2016, Sergey Korshunoff wrote:

> The previous trace is wrong, sorry
> A correct place is
>
>  else if (tok == '{') {
>     if (const_wanted)
>         tcc_error("expected constant");
>     /* save all registers */
>     save_regs(0); <<<<<<<<<<<<<<<
>     /* statement expression : we do not accept break/continue
>        inside as GCC does */
>     block(NULL, NULL, NULL, NULL, 0, 1);
>     skip(')');
> } else {
>     gexpr();
>     skip(')');
> }
>
> This is a save_regs(0) which generate a code when nocode_wanted=1
> When
>   if(!nocode_wanted)
>     save_regs(0);
> then there is no error messages but a test program still hangs

Of course, because the whole parsing of the ({block}) still generates 
code.  The nocode_wanted hack currently doesn't work for statement 
expressions, and as Edmund says deserves a little thought if it's applied 
at the right level currently (well I think it's clear that it isn't, but 
the question what the right level is remains).


Ciao,
Michael.