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fix corner cases with yield

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fixes #4769
This commit is contained in:
alexlamsl 2021-03-14 03:16:15 +08:00
parent 241113200e
commit a9e9493cee
2 changed files with 43 additions and 2 deletions
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5
lib/compress.js
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@ -8735,7 +8735,7 @@ merge(Compressor.prototype, {
var can_inline = can_drop && compressor.option("inline") && !self.is_expr_pure(compressor);
if (can_inline && stat instanceof AST_Return) {
var value = stat.value;
if (exp === fn && (!value || value.is_constant_expression() && safe_from_await_yield(value))) {
if (exp === fn && (!value || value.is_constant_expression()) && safe_from_await_yield(fn)) {
return make_sequence(self, convert_args(value)).optimize(compressor);
}
}
@ -8803,7 +8803,8 @@ merge(Compressor.prototype, {
&& can_drop
&& all(fn.body, is_empty)
&& (fn === exp ? fn_name_unused(fn, compressor) : !has_default && !has_destructured && !fn.rest)
&& !(is_arrow(fn) && fn.value)) {
&& !(is_arrow(fn) && fn.value)
&& safe_from_await_yield(fn)) {
return make_sequence(self, convert_args()).optimize(compressor);
}
}

40
test/compress/yields.js
View File

@ -950,3 +950,43 @@ issue_4641_2: {
]
node_version: ">=10"
}
issue_4769_1: {
options = {
side_effects: true,
}
input: {
console.log(function*() {
(function({} = yield => {}) {})();
}().next().done);
}
expect: {
console.log(function*() {
(function({} = yield => {}) {})();
}().next().done);
}
expect_stdout: "true"
node_version: ">=6"
}
issue_4769_2: {
options = {
inline: true,
}
input: {
console.log(function*() {
return function({} = yield => {}) {
return "PASS";
}();
}().next().value);
}
expect: {
console.log(function*() {
return function({} = yield => {}) {
return "PASS";
}();
}().next().value);
}
expect_stdout: "PASS"
node_version: ">=6"
}