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validate against multiple parents on AST_Node (#4032)

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- fix related issues in `global_defs`, `ie8` & `reduce_vars`
This commit is contained in:
Alex Lam S.L
2020-07-31 01:09:19 +01:00
committed by GitHub
parent ee632a5519
commit 88423f2574
7 changed files with 63 additions and 11 deletions
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6
lib/compress.js
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@@ -3072,7 +3072,7 @@ merge(Compressor.prototype, {
(function(def) {
function to_node(value, orig) {
if (value instanceof AST_Node) return make_node(value.CTOR, orig, value);
if (value instanceof AST_Node) return value.clone(true);
if (Array.isArray(value)) return make_node(AST_Array, orig, {
elements: value.map(function(value) {
return to_node(value, orig);
@@ -7642,6 +7642,8 @@ merge(Compressor.prototype, {
single_use = false;
} else if (recursive_ref(compressor, def)) {
single_use = false;
} else if (compressor.option("ie8") && fixed.name && def !== fixed.name.definition()) {
single_use = false;
} else if (def.scope !== self.scope || def.orig[0] instanceof AST_SymbolFunarg) {
single_use = fixed.is_constant_expression(self.scope);
if (single_use == "f") {
@@ -7650,8 +7652,6 @@ merge(Compressor.prototype, {
scope.inlined = true;
} while (scope = scope.parent_scope);
}
} else if (compressor.option("ie8") && fixed.name && def !== fixed.name.definition()) {
single_use = false;
}
if (single_use) fixed.parent_scope = self.scope;
} else if (!fixed || !fixed.is_constant_expression()) {