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drop unused extends properly (#5461)

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This commit is contained in:
Alex Lam S.L
2022-05-22 20:53:32 +01:00
committed by GitHub
parent 59edda6ca5
commit c2ca7b7659
3 changed files with 126 additions and 10 deletions
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11
lib/compress.js
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@@ -6788,7 +6788,6 @@ Compressor.prototype.compress = function(node) {
}
});
// pass 3: we should drop declarations not in_use
var unused_fn_names = [];
var calls_to_drop_args = [];
var fns_with_marked_args = [];
var trimmer = new TreeTransformer(function(node) {
@@ -6909,7 +6908,7 @@ Compressor.prototype.compress = function(node) {
}
}
if (node instanceof AST_ClassExpression && node.name && drop_fn_name(node.name.definition())) {
unused_fn_names.push(node);
node.name = null;
}
if (node instanceof AST_Lambda) {
if (drop_funcs && node !== self && node instanceof AST_LambdaDefinition) {
@@ -6925,7 +6924,7 @@ Compressor.prototype.compress = function(node) {
}
}
if (node instanceof AST_LambdaExpression && node.name && drop_fn_name(node.name.definition())) {
unused_fn_names.push(node);
node.name = null;
}
if (!(node instanceof AST_Accessor)) {
var args, spread, trim = compressor.drop_fargs(node, parent);
@@ -6966,6 +6965,7 @@ Compressor.prototype.compress = function(node) {
}
}
var default_length = trim ? -1 : node.length();
var trim_value = args && !node.uses_arguments && parent !== compressor.parent();
for (var i = argnames.length; --i >= 0;) {
var sym = argnames[i];
if (sym instanceof AST_SymbolFunarg) {
@@ -6987,7 +6987,7 @@ Compressor.prototype.compress = function(node) {
} else {
var trimmed = trim_destructured(sym, args[i], function(node) {
return node.definition().id in in_use_ids ? node : null;
}, !node.uses_arguments, sym);
}, trim_value, sym);
funarg = trimmed.name;
if (trimmed.value) args[i] = trimmed.value;
}
@@ -7363,9 +7363,6 @@ Compressor.prototype.compress = function(node) {
&& self.body[0].value == "use strict") {
self.body.length = 0;
}
unused_fn_names.forEach(function(fn) {
fn.name = null;
});
calls_to_drop_args.forEach(function(call) {
drop_unused_call_args(call, compressor, fns_with_marked_args);
});