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compress apply() & call() of function (#2613)

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- `fn.apply(a, [ ... ])` => `fn.call(a, ...)`
- `fn.call(a, ... )` => `a, fn(...)`

where `fn` can be `function` literal or symbol reference linked through `reduce_vars`
This commit is contained in:
Alex Lam S.L
2017-12-18 16:23:39 +08:00
committed by GitHub
parent 0b0eac1d5d
commit 8ddcbc39e6
2 changed files with 154 additions and 0 deletions
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126
test/compress/functions.js
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@@ -923,3 +923,129 @@ issue_2604_2: {
}
expect_stdout: "PASS"
}
unsafe_apply_1: {
options = {
inline: true,
passes: 2,
reduce_vars: true,
side_effects: true,
unsafe: true,
unused: true,
}
input: {
(function(a, b) {
console.log(a, b);
}).apply("foo", [ "bar" ]);
(function(a, b) {
console.log(this, a, b);
}).apply("foo", [ "bar" ]);
(function(a, b) {
console.log(a, b);
}).apply("foo", [ "bar" ], "baz");
}
expect: {
console.log("bar", void 0);
(function(a, b) {
console.log(this, a, b);
}).call("foo", "bar");
(function(a, b) {
console.log(a, b);
}).apply("foo", [ "bar" ], "baz");
}
expect_stdout: true
}
unsafe_apply_2: {
options = {
reduce_vars: true,
side_effects: true,
toplevel: true,
unsafe: true,
}
input: {
function foo() {
console.log(a, b);
}
var bar = function(a, b) {
console.log(this, a, b);
}
(function() {
foo.apply("foo", [ "bar" ]);
bar.apply("foo", [ "bar" ]);
})();
}
expect: {
function foo() {
console.log(a, b);
}
var bar = function(a, b) {
console.log(this, a, b);
}
(function() {
foo("bar");
bar.call("foo", "bar");
})();
}
expect_stdout: true
}
unsafe_call_1: {
options = {
inline: true,
passes: 2,
reduce_vars: true,
side_effects: true,
unsafe: true,
unused: true,
}
input: {
(function(a, b) {
console.log(a, b);
}).call("foo", "bar");
(function(a, b) {
console.log(this, a, b);
}).call("foo", "bar");
}
expect: {
console.log("bar", void 0);
(function(a, b) {
console.log(this, a, b);
}).call("foo", "bar");
}
expect_stdout: true
}
unsafe_call_2: {
options = {
reduce_vars: true,
side_effects: true,
toplevel: true,
unsafe: true,
}
input: {
function foo() {
console.log(a, b);
}
var bar = function(a, b) {
console.log(this, a, b);
}
(function() {
foo.call("foo", "bar");
bar.call("foo", "bar");
})();
}
expect: {
function foo() {
console.log(a, b);
}
var bar = function(a, b) {
console.log(this, a, b);
}
(function() {
foo("bar");
bar.call("foo", "bar");
})();
}
expect_stdout: true
}