[epScript] Optimizing Compiler

[armoha]

• [ ] Peephole optimizations: 2 * a → a + a
• [ ] Loop-invariant code motion:

  while(true) { a += dwread(dest); }
  // ↓ 
  const v = dwread(dest);
  while(true) { a += v; }

• [ ] Loop unrolling:

  for(var i = 0 ; i < 4; i++) { if(bread(5*i) == 0) x++; }
  // ↓ 
  foreach(i : py_range(4)) { Trigger(DeathsX(i, Exactly, 0, 0, 0xFF<<(8*i)), x.AddNumber(1)); }

• [ ] Common subexpression elimination:

  a += dwread(dest) + 3; b -= dwread(dest) + 6; c *= 2*dwread(dest);
  // ↓ 
  const v = dwread(dest); a += v + 3; b -= v + 6; c *= v+v;

• [ ] Constant folding: a + 1 + 2 + 3 + 4 → a + 10