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implement optimization: (x = 2 * x) ---> (x *= 2)

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kzc
2016-08-26 18:47:25 -04:00
parent 1a78bbcd23
commit 0bd8053524
3 changed files with 258 additions and 10 deletions
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238
test/compress/assignment.js Normal file
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op_equals_left_local_var: {
options = {
evaluate: true,
}
input: {
var x;
x = x + 3;
x = x - 3;
x = x / 3;
x = x * 3;
x = x >> 3;
x = x << 3;
x = x >>> 3;
x = x | 3;
x = x ^ 3;
x = x % 3;
x = x & 3;
x = x + g();
x = x - g();
x = x / g();
x = x * g();
x = x >> g();
x = x << g();
x = x >>> g();
x = x | g();
x = x ^ g();
x = x % g();
x = x & g();
}
expect: {
var x;
x += 3;
x -= 3;
x /= 3;
x *= 3;
x >>= 3;
x <<= 3;
x >>>= 3;
x |= 3;
x ^= 3;
x %= 3;
x &= 3;
x += g();
x -= g();
x /= g();
x *= g();
x >>= g();
x <<= g();
x >>>= g();
x |= g();
x ^= g();
x %= g();
x &= g();
}
}
op_equals_right_local_var: {
options = {
evaluate: true,
}
input: {
var x;
x = (x -= 2) ^ x;
x = 3 + x;
x = 3 - x;
x = 3 / x;
x = 3 * x;
x = 3 >> x;
x = 3 << x;
x = 3 >>> x;
x = 3 | x;
x = 3 ^ x;
x = 3 % x;
x = 3 & x;
x = g() + x;
x = g() - x;
x = g() / x;
x = g() * x;
x = g() >> x;
x = g() << x;
x = g() >>> x;
x = g() | x;
x = g() ^ x;
x = g() % x;
x = g() & x;
}
expect: {
var x;
x = (x -= 2) ^ x;
x = 3 + x;
x = 3 - x;
x = 3 / x;
x *= 3;
x = 3 >> x;
x = 3 << x;
x = 3 >>> x;
x |= 3;
x ^= 3;
x = 3 % x;
x &= 3;
x = g() + x;
x = g() - x;
x = g() / x;
x = g() * x;
x = g() >> x;
x = g() << x;
x = g() >>> x;
x = g() | x;
x = g() ^ x;
x = g() % x;
x = g() & x;
}
}
op_equals_left_global_var: {
options = {
evaluate: true,
}
input: {
x = x + 3;
x = x - 3;
x = x / 3;
x = x * 3;
x = x >> 3;
x = x << 3;
x = x >>> 3;
x = x | 3;
x = x ^ 3;
x = x % 3;
x = x & 3;
x = x + g();
x = x - g();
x = x / g();
x = x * g();
x = x >> g();
x = x << g();
x = x >>> g();
x = x | g();
x = x ^ g();
x = x % g();
x = x & g();
}
expect: {
x += 3;
x -= 3;
x /= 3;
x *= 3;
x >>= 3;
x <<= 3;
x >>>= 3;
x |= 3;
x ^= 3;
x %= 3;
x &= 3;
x += g();
x -= g();
x /= g();
x *= g();
x >>= g();
x <<= g();
x >>>= g();
x |= g();
x ^= g();
x %= g();
x &= g();
}
}
op_equals_right_global_var: {
options = {
evaluate: true,
}
input: {
x = (x -= 2) ^ x;
x = 3 + x;
x = 3 - x;
x = 3 / x;
x = 3 * x;
x = 3 >> x;
x = 3 << x;
x = 3 >>> x;
x = 3 | x;
x = 3 ^ x;
x = 3 % x;
x = 3 & x;
x = g() + x;
x = g() - x;
x = g() / x;
x = g() * x;
x = g() >> x;
x = g() << x;
x = g() >>> x;
x = g() | x;
x = g() ^ x;
x = g() % x;
x = g() & x;
}
expect: {
x = (x -= 2) ^ x;
x = 3 + x;
x = 3 - x;
x = 3 / x;
x *= 3;
x = 3 >> x;
x = 3 << x;
x = 3 >>> x;
x |= 3;
x ^= 3;
x = 3 % x;
x &= 3;
x = g() + x;
x = g() - x;
x = g() / x;
x = g() * x;
x = g() >> x;
x = g() << x;
x = g() >>> x;
x = g() | x;
x = g() ^ x;
x = g() % x;
x = g() & x;
}
}