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compress chained compound assignments (#2850)

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This commit is contained in:
Alex Lam S.L
2018-01-29 15:13:25 +08:00
committed by GitHub
parent 4eb4cb656c
commit 6fa3fbeae8
3 changed files with 125 additions and 43 deletions
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11
test/compress/collapse_vars.js
View File

@@ -52,13 +52,8 @@ collapse_vars_side_effects_1: {
console.log.bind(console)(s.charAt(i++), s.charAt(i++), s.charAt(i++), 7);
}
function f2() {
var log = console.log.bind(console),
s = "abcdef",
i = 2,
x = s.charAt(i++),
y = s.charAt(i++),
z = s.charAt(i++);
log(x, i, y, z, 7);
var s = "abcdef", i = 2;
console.log.bind(console)(s.charAt(i++), 5, s.charAt(i++), s.charAt(i++), 7);
}
function f3() {
var s = "abcdef",
@@ -72,7 +67,7 @@ collapse_vars_side_effects_1: {
var i = 10,
x = i += 2,
y = i += 3;
console.log.bind(console)(x, i += 4, y, i);
console.log.bind(console)(x, i += 4, y, 19);
}
f1(), f2(), f3(), f4();
}

94
test/compress/reduce_vars.js
View File

@@ -76,14 +76,12 @@ modified: {
console.log(a + 1);
console.log(b + 1);
}
function f1() {
var a = 1, b = 2;
--b;
console.log(a + 1);
console.log(b + 1);
}
function f2() {
var a = 1, b = 2, c = 3;
b = c;
@@ -92,7 +90,6 @@ modified: {
console.log(a + c);
console.log(a + b + c);
}
function f3() {
var a = 1, b = 2, c = 3;
b *= c;
@@ -101,7 +98,6 @@ modified: {
console.log(a + c);
console.log(a + b + c);
}
function f4() {
var a = 1, b = 2, c = 3;
if (a) {
@@ -114,28 +110,26 @@ modified: {
console.log(a + c);
console.log(a + b + c);
}
function f5(a) {
B = a;
console.log(A ? 'yes' : 'no');
console.log(B ? 'yes' : 'no');
console.log(typeof A ? "yes" : "no");
console.log(typeof B ? "yes" : "no");
}
f0(), f1(), f2(), f3(), f4(), f5();
}
expect: {
function f0() {
var b = 2;
b++;
console.log(2);
console.log(b + 1);
console.log(4);
}
function f1() {
var b = 2;
--b;
console.log(2);
console.log(b + 1);
console.log(2);
}
function f2() {
3;
console.log(4);
@@ -143,16 +137,14 @@ modified: {
console.log(4);
console.log(7);
}
function f3() {
var b = 2;
b *= 3;
console.log(1 + b);
console.log(b + 3);
console.log(7);
console.log(9);
console.log(4);
console.log(1 + b + 3);
console.log(10);
}
function f4() {
var b = 2, c = 3;
b = c;
@@ -161,13 +153,33 @@ modified: {
console.log(1 + c);
console.log(1 + b + c);
}
function f5(a) {
B = a;
console.log(A ? 'yes' : 'no');
console.log(B ? 'yes' : 'no');
console.log(typeof A ? "yes" : "no");
console.log(typeof B ? "yes" : "no");
}
f0(), f1(), f2(), f3(), f4(), f5();
}
expect_stdout: [
"2",
"4",
"2",
"2",
"4",
"6",
"4",
"7",
"7",
"9",
"4",
"10",
"4",
"6",
"4",
"7",
"yes",
"yes",
]
}
unsafe_evaluate: {
@@ -745,7 +757,7 @@ iife: {
expect: {
!function(a, b, c) {
b++;
console.log(0, 1 * b, 5);
console.log(0, 3, 5);
}(1, 2, 3);
}
expect_stdout: true
@@ -766,7 +778,7 @@ iife_new: {
expect: {
var A = new function(a, b, c) {
b++;
console.log(0, 1 * b, 5);
console.log(0, 3, 5);
}(1, 2, 3);
}
expect_stdout: true
@@ -5383,3 +5395,43 @@ issue_2836: {
}
expect_stdout: "PASS"
}
lvalues_def_1: {
options = {
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
var b = 1;
var a = b++, b = NaN;
console.log(a, b);
}
expect: {
var b = 1;
var a = b++;
b = NaN;
console.log(a, b);
}
expect_stdout: "1 NaN"
}
lvalues_def_2: {
options = {
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
var b = 1;
var a = b += 1, b = NaN;
console.log(a, b);
}
expect: {
var b = 1;
var a = b += 1;
b = NaN;
console.log(a, b);
}
expect_stdout: "2 NaN"
}