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reduce this within functions (#2421)

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- only replace same-scope usages
- augment `test/ufuzz.js` to test for `this`


fixes #2420
This commit is contained in:
Alex Lam S.L
2017-11-04 00:31:37 +08:00
committed by GitHub
parent a48f87abf2
commit c8b6f4733d
3 changed files with 129 additions and 31 deletions
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84
test/compress/reduce_vars.js
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@@ -3295,3 +3295,87 @@ escaped_prop: {
}
expect_stdout: "2"
}
issue_2420_1: {
options = {
reduce_vars: true,
unused: true,
}
input: {
function run() {
var self = this;
if (self.count++)
self.foo();
else
self.bar();
}
var o = {
count: 0,
foo: function() { console.log("foo"); },
bar: function() { console.log("bar"); },
};
run.call(o);
run.call(o);
}
expect: {
function run() {
if (this.count++)
this.foo();
else
this.bar();
}
var o = {
count: 0,
foo: function() { console.log("foo"); },
bar: function() { console.log("bar"); },
};
run.call(o);
run.call(o);
}
expect_stdout: [
"bar",
"foo",
]
}
issue_2420_2: {
options = {
reduce_vars: true,
unused: true,
}
input: {
function f() {
var that = this;
if (that.bar)
that.foo();
else
!function(that, self) {
console.log(this === that, self === this, that === self);
}(that, this);
}
f.call({
bar: 1,
foo: function() { console.log("foo", this.bar); },
});
f.call({});
}
expect: {
function f() {
if (this.bar)
this.foo();
else
!function(that, self) {
console.log(this === that, self === this, that === self);
}(this, this);
}
f.call({
bar: 1,
foo: function() { console.log("foo", this.bar); },
});
f.call({});
}
expect_stdout: [
"foo 1",
"false false true",
]
}