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inline single-use functions that are not constant expressions (#2434)

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fixes #2428
This commit is contained in:
Alex Lam S.L
2017-11-05 22:14:11 +08:00
committed by GitHub
parent f46281e2b7
commit 2c2fd89e34
3 changed files with 45 additions and 23 deletions
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20
lib/compress.js
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@@ -150,7 +150,9 @@ merge(Compressor.prototype, {
}
var passes = +this.options.passes || 1;
var last_count = 1 / 0;
var mangle = { ie8: this.option("ie8") };
for (var pass = 0; pass < passes; pass++) {
node.figure_out_scope(mangle);
if (pass > 0 || this.option("reduce_vars"))
node.reset_opt_flags(this);
node = node.transform(this);
@@ -3528,6 +3530,7 @@ merge(Compressor.prototype, {
&& !exp.uses_arguments
&& !exp.uses_eval
&& exp.body.length == 1
&& !exp.contains_this()
&& all(exp.argnames, function(arg) {
return arg.__unused;
})
@@ -3541,23 +3544,6 @@ merge(Compressor.prototype, {
expression: stat.body
});
}
if (value) {
var tw = new TreeWalker(function(node) {
if (!value) return true;
if (node instanceof AST_SymbolRef) {
var ref = node.scope.find_variable(node);
if (ref && ref.scope.parent_scope === fn.parent_scope) {
value = null;
return true;
}
}
if (node instanceof AST_This && !tw.find_parent(AST_Scope)) {
value = null;
return true;
}
});
value.walk(tw);
}
if (value) {
var args = self.args.concat(value);
return make_sequence(self, args).optimize(compressor);