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4 points by sacado 4125 days ago | link | parent

Actually, I tried the above (tuning generated code so as to change something like :

  BEGIN_JUMP(3); PUSH(LOCAL(5)); PUSH(LOCAL(6)); PUSH(LOCAL(7)); END_JUMP(3);
to its semantic but obviously much faster equivalent :

  memcpy (stack, stack + 5, sizeof(obj) * 3); sp = stack + 3; END_JUMP(3);
and

  PUSH(x); if(POP)
to

  if (x)
Well, with full optimizations on gcc (-O3), it doesn't change anything (at least in execution time, I didn't compare generated machine codes). Wow, gcc seems really clever. Now that I know how hard it is to implement a compiler, I can only applaud :)


1 point by almkglor 4125 days ago | link

WOW. gcc must be real good then ^^.

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