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drop argument value after collapse_vars (#2190)

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This commit is contained in:
Alex Lam S.L
2017-07-02 04:28:11 +08:00
committed by GitHub
parent d40950b741
commit 8b69a3d18e
3 changed files with 52 additions and 5 deletions
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14
lib/compress.js
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@@ -902,6 +902,14 @@ merge(Compressor.prototype, {
}
function remove_candidate(expr) {
if (expr.name instanceof AST_SymbolFunarg) {
var index = compressor.self().argnames.indexOf(expr.name);
var args = compressor.parent().args;
if (args[index]) args[index] = make_node(AST_Number, args[index], {
value: 0
});
return true;
}
var found = false;
return statements[stat_index].transform(new TreeTransformer(function(node, descend, in_list) {
if (found) return node;
@@ -3205,7 +3213,7 @@ merge(Compressor.prototype, {
var value = stat.value;
if (!value || value.is_constant_expression()) {
var args = self.args.concat(value || make_node(AST_Undefined, self));
return make_sequence(self, args).transform(compressor);
return make_sequence(self, args).optimize(compressor);
}
}
if (exp instanceof AST_Function) {
@@ -3246,12 +3254,12 @@ merge(Compressor.prototype, {
}
if (value) {
var args = self.args.concat(value);
return make_sequence(self, args).transform(compressor);
return make_sequence(self, args).optimize(compressor);
}
}
if (compressor.option("side_effects") && all(exp.body, is_empty)) {
var args = self.args.concat(make_node(AST_Undefined, self));
return make_sequence(self, args).transform(compressor);
return make_sequence(self, args).optimize(compressor);
}
}
if (compressor.option("drop_console")) {