Re: [Tinycc-devel] Largish mob update from me

[grischka]

Michael Matz wrote:
> * simple dead code optimization: in code like 
>     if (1) ...
>     else {stuff};
>   don't emit anything for the else branch code (unless there's a different 
>   way to enter this code, e.g. via a label).

Just occurs to me that I've seen such before, including function
    static void remove_code(int t, int s);
and all.

From http://lists.gnu.org/archive/html/tinycc-devel/2013-09/msg00119.html

>     Optimizations are enabled by using -O, but I neglected to add them to
>     the help:
>     
>         -Of - functions
>         -Oj - jumps
>         -Om - multiplications and pointer division
>         -Or - registers
>         -O -O2 -Ox - all optimizations
>         -O1 - all but -Oj (i.e. -Ofmr)
>         -Os - all but -Om (i.e. -Ofjr; also removes PE function alignment)
>         -O0 - no optimizations (default)

The mentioned patch (based on release_0_9_26) is attached.

--- grischka

optimize-386-from-Jason-Hood.zip
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