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compress arithmetic expressions further (#3529)

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This commit is contained in:
Alex Lam S.L
2019-10-27 03:07:07 +08:00
committed by GitHub
parent 85237b08d4
commit 50a578c1f6
3 changed files with 433 additions and 76 deletions
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355
test/compress/numbers.js
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@@ -51,17 +51,20 @@ comparisons: {
comparisons: true,
}
input: {
var x = "42", y = "0x30";
console.log(
~x === 42,
x % n === 42
x % y === 42
);
}
expect: {
var x = "42", y = "0x30";
console.log(
42 == ~x,
x % n == 42
x % y == 42
);
}
expect_stdout: "false true"
}
evaluate_1: {
@@ -103,7 +106,7 @@ evaluate_1: {
}
}
evaluate_2: {
evaluate_1_unsafe_math: {
options = {
evaluate: true,
unsafe_math: true,
@@ -118,6 +121,8 @@ evaluate_2: {
1 + x-- + 2 + 3,
1 + (x*y + 2) + 3,
1 + (2 + x + 3),
1 + (2 + ~x + 3),
-y + (2 + ~x + 3),
1 & (2 & x & 3),
1 + (2 + (x |= 0) + 3)
);
@@ -126,18 +131,104 @@ evaluate_2: {
console.log(
x + 1 + 2,
2 * x,
3 + +x,
+x + 3,
1 + x + 2 + 3,
3 | x,
6 + x--,
6 + x*y,
x*y + 6,
1 + (2 + x + 3),
6 + ~x,
5 - y + ~x,
0 & x,
6 + (x |= 0)
);
}
}
evaluate_2: {
options = {
evaluate: true,
unsafe_math: false,
}
input: {
var x = "42", y = null;
console.log(
x + 1 + 2,
x * 1 * 2,
+x + 1 + 2,
1 + x + 2 + 3,
1 | x | 2 | 3,
1 + x-- + 2 + 3,
1 + (x*y + 2) + 3,
1 + (2 + x + 3),
1 + (2 + ~x + 3),
-y + (2 + ~x + 3),
1 & (2 & x & 3),
1 + (2 + (x |= 0) + 3)
);
}
expect: {
var x = "42", y = null;
console.log(
x + 1 + 2,
1 * x * 2,
+x + 1 + 2,
1 + x + 2 + 3,
3 | x,
1 + x-- + 2 + 3,
x*y + 2 + 1 + 3,
1 + (2 + x + 3),
2 + ~x + 3 + 1,
2 + ~x + 3 - y,
0 & x,
2 + (x |= 0) + 3 + 1
);
}
expect_stdout: "4212 84 45 14223 43 48 6 47 -36 -37 0 47"
}
evaluate_2_unsafe_math: {
options = {
evaluate: true,
unsafe_math: true,
}
input: {
var x = "42", y = null;
console.log(
x + 1 + 2,
x * 1 * 2,
+x + 1 + 2,
1 + x + 2 + 3,
1 | x | 2 | 3,
1 + x-- + 2 + 3,
1 + (x*y + 2) + 3,
1 + (2 + x + 3),
1 + (2 + ~x + 3),
-y + (2 + ~x + 3),
1 & (2 & x & 3),
1 + (2 + (x |= 0) + 3)
);
}
expect: {
var x = "42", y = null;
console.log(
x + 1 + 2,
2 * x,
+x + 3,
1 + x + 2 + 3,
3 | x,
6 + x--,
x*y + 6,
1 + (2 + x + 3),
6 + ~x,
5 + ~x - y,
0 & x,
6 + (x |= 0)
);
}
expect_stdout: "4212 84 45 14223 43 48 6 47 -36 -37 0 47"
}
evaluate_3: {
options = {
evaluate: true,
@@ -148,7 +239,7 @@ evaluate_3: {
console.log(1 + Number(x) + 2);
}
expect: {
console.log(3 + +x);
console.log(+x + 3);
}
}
@@ -182,6 +273,258 @@ evaluate_4: {
}
}
evaluate_5: {
options = {
evaluate: true,
unsafe_math: false,
}
input: {
var a = true;
console.log(
+a + 2 + 3,
+a + 2 - 3,
+a - 2 + 3,
+a - 2 - 3,
2 + +a + 3,
2 + +a - 3,
2 - +a + 3,
2 - +a - 3,
2 + 3 + +a,
2 + 3 - +a,
2 - 3 + +a,
2 - 3 - +a
);
}
expect: {
var a = true;
console.log(
+a + 2 + 3,
+a + 2 - 3,
a - 2 + 3,
a - 2 - 3,
+a + 2 + 3,
+a + 2 - 3,
2 - a + 3,
2 - a - 3,
+a + 5,
5 - a,
+a - 1,
-1 - a
);
}
expect_stdout: "6 0 2 -4 6 0 4 -2 6 4 0 -2"
}
evaluate_5_unsafe_math: {
options = {
evaluate: true,
unsafe_math: true,
}
input: {
var a = true;
console.log(
+a + 2 + 3,
+a + 2 - 3,
+a - 2 + 3,
+a - 2 - 3,
2 + +a + 3,
2 + +a - 3,
2 - +a + 3,
2 - +a - 3,
2 + 3 + +a,
2 + 3 - +a,
2 - 3 + +a,
2 - 3 - +a
);
}
expect: {
var a = true;
console.log(
+a + 5,
+a + -1,
a - -1,
a - 5,
+a + 5,
+a + -1,
5 - a,
-1 - a,
+a + 5,
5 - a,
+a - 1,
-1 - a
);
}
expect_stdout: "6 0 2 -4 6 0 4 -2 6 4 0 -2"
}
evaluate_6: {
options = {
evaluate: true,
unsafe_math: false,
}
input: {
var a = true;
console.log(
-a + 2 + 3,
-a + 2 - 3,
-a - 2 + 3,
-a - 2 - 3,
2 + -a + 3,
2 + -a - 3,
2 - -a + 3,
2 - -a - 3,
2 + 3 + -a,
2 + 3 - -a,
2 - 3 + -a,
2 - 3 - -a
);
}
expect: {
var a = true;
console.log(
2 - a + 3,
2 - a - 3,
-a - 2 + 3,
-a - 2 - 3,
2 - a + 3,
2 - a - 3,
2 + a + 3,
2 + a - 3,
5 - a,
5 + a,
-1 - a,
-1 + a
);
}
expect_stdout: "4 -2 0 -6 4 -2 6 0 4 6 -2 0"
}
evaluate_6_unsafe_math: {
options = {
evaluate: true,
unsafe_math: true,
}
input: {
var a = true;
console.log(
-a + 2 + 3,
-a + 2 - 3,
-a - 2 + 3,
-a - 2 - 3,
2 + -a + 3,
2 + -a - 3,
2 - -a + 3,
2 - -a - 3,
2 + 3 + -a,
2 + 3 - -a,
2 - 3 + -a,
2 - 3 - -a
);
}
expect: {
var a = true;
console.log(
5 - a,
-1 - a,
-a - -1,
-a - 5,
5 - a,
-1 - a,
2 + a + 3,
-1 + a,
5 - a,
5 + a,
-1 - a,
-1 + a
);
}
expect_stdout: "4 -2 0 -6 4 -2 6 0 4 6 -2 0"
}
evaluate_7: {
options = {
evaluate: true,
unsafe_math: false,
}
input: {
var x = "42", y;
console.log(
+x + 2 + (3 + !y),
+x + 2 + (3 - !y),
+x + 2 - (3 + !y),
+x + 2 - (3 - !y),
+x - 2 + (3 + !y),
+x - 2 + (3 - !y),
+x - 2 - (3 + !y),
+x - 2 - (3 - !y)
);
}
expect: {
var x = "42", y;
console.log(
+x + 2 + (3 + !y),
+x + 2 + (3 - !y),
+x + 2 - (3 + !y),
+x + 2 - (3 - !y),
x - 2 + (3 + !y),
x - 2 + (3 - !y),
x - 2 - (3 + !y),
x - 2 - (3 - !y)
);
}
expect_stdout: "48 46 40 42 44 42 36 38"
}
evaluate_7_unsafe_math: {
options = {
evaluate: true,
unsafe_math: true,
}
input: {
var x = "42", y;
console.log(
+x + 2 + (3 + !y),
+x + 2 + (3 - !y),
+x + 2 - (3 + !y),
+x + 2 - (3 - !y),
+x - 2 + (3 + !y),
+x - 2 + (3 - !y),
+x - 2 - (3 + !y),
+x - 2 - (3 - !y)
);
}
expect: {
var x = "42", y;
console.log(
+x + 5 + !y,
+x + 5 - !y,
+x + -1 - !y,
+x + -1 + !y,
x - -1 + !y,
x - -1 - !y,
x - 5 - !y,
x - 5 + !y
);
}
expect_stdout: "48 46 40 42 44 42 36 38"
}
NaN_redefined: {
options = {
evaluate: true,
unsafe_math: true,
}
input: {
var NaN;
console.log(1 / (0 / 0));
}
expect: {
var NaN;
console.log(0 / 0);
}
expect_stdout: "NaN"
}
issue_1710: {
options = {
evaluate: true,