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inline functions with directives more effectively (#3604)

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This commit is contained in:
Alex Lam S.L
2019-11-26 01:51:04 +08:00
committed by GitHub
parent 48a0f6fe41
commit 6768e6578f
2 changed files with 36 additions and 2 deletions
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12
lib/compress.js
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@@ -2724,6 +2724,14 @@ merge(Compressor.prototype, {
});
}
AST_Lambda.DEFMETHOD("first_statement", function() {
var body = this.body;
for (var i = 0; i < body.length; i++) {
var stat = body[i];
if (!(stat instanceof AST_Directive)) return stat;
}
});
function try_evaluate(compressor, node) {
var ev = node.evaluate(compressor);
if (ev === node) return node;
@@ -3098,7 +3106,7 @@ merge(Compressor.prototype, {
if (fn instanceof AST_Lambda) {
if (fn.evaluating) return this;
if (fn.name && fn.name.definition().recursive_refs > 0) return this;
var stat = fn.body[0];
var stat = fn.first_statement();
if (!(stat instanceof AST_Return)) return this;
var args = eval_args(this.args);
if (!args) return this;
@@ -5363,7 +5371,7 @@ merge(Compressor.prototype, {
}
}
}
var stat = is_func && fn.body[0];
var stat = is_func && fn.first_statement();
var can_inline = compressor.option("inline") && !self.is_expr_pure(compressor);
if (exp === fn && can_inline && stat instanceof AST_Return) {
var value = stat.value;