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enhance side_effects

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This commit is contained in:
alexlamsl 2022-07-28 00:14:50 +08:00
parent da930affd2
commit d057434f26
2 changed files with 45 additions and 13 deletions
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32
lib/compress.js
View File

@ -10497,6 +10497,14 @@ Compressor.prototype.compress = function(node) {
})).optimize(compressor);
}
break;
} else if (compressor.option("side_effects")
&& exp instanceof AST_Call
&& exp.args.length == 1
&& is_undeclared_ref(exp.expression)
&& exp.expression.name == "Object") {
var call = self.clone();
call.expression = maintain_this_binding(compressor, self, exp, exp.args[0]);
return call.optimize(compressor);
}
}
if (compressor.option("unsafe_Function")
@ -11131,24 +11139,22 @@ Compressor.prototype.compress = function(node) {
});
OPT(AST_New, function(self, compressor) {
if (compressor.option("unsafe")) {
var exp = self.expression;
if (is_undeclared_ref(exp)) switch (exp.name) {
case "Array":
case "Error":
case "Function":
case "Object":
case "RegExp":
return make_node(AST_Call, self, self).transform(compressor);
}
}
if (compressor.option("sequences")) {
var seq = lift_sequence_in_expression(self, compressor);
if (seq !== self) return seq.optimize(compressor);
}
if (compressor.option("unused")) drop_unused_call_args(self, compressor);
if (compressor.option("unsafe")) {
var exp = self.expression;
if (is_undeclared_ref(exp)) {
switch (exp.name) {
case "Object":
case "RegExp":
case "Function":
case "Error":
case "Array":
return make_node(AST_Call, self, self).transform(compressor);
}
}
}
return self;
});

26
test/compress/side_effects.js
View File

@ -318,6 +318,32 @@ unsafe_string_replace: {
expect_stdout: "PASS"
}
unsafe_Object_call: {
options = {
side_effects: true,
unsafe: true,
}
input: {
var o = {
f: function(a) {
console.log(a ? this.p : "FAIL 1");
},
p: "FAIL 2",
}, p = "PASS";
Object(o.f)(42);
}
expect: {
var o = {
f: function(a) {
console.log(a ? this.p : "FAIL 1");
},
p: "FAIL 2",
}, p = "PASS";
(0, o.f)(42);
}
expect_stdout: "PASS"
}
drop_value: {
options = {
side_effects: true,