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minor clean-ups (#5300)

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This commit is contained in:
Alex Lam S.L
2022-01-16 17:14:52 +00:00
committed by GitHub
parent d96c59f9e6
commit 774feeadb8
2 changed files with 9 additions and 19 deletions
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26
lib/compress.js
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@@ -2530,7 +2530,7 @@ Compressor.prototype.compress = function(node) {
}
if (names.has(sym.name)) continue;
names.set(sym.name, true);
if (value) arg = !arg || is_undefined(arg) ? value : null;
if (value) arg = is_undefined(arg) ? value : null;
if (!arg && !value) {
arg = make_node(AST_Undefined, sym).transform(compressor);
} else if (arg instanceof AST_Lambda && arg.pinned()) {
@@ -3423,10 +3423,6 @@ Compressor.prototype.compress = function(node) {
return false;
}
function is_return_void(value) {
return !value || value instanceof AST_UnaryPrefix && value.operator == "void";
}
function match_target(target) {
return last_of(compressor, function(node) {
return node === target;
@@ -3434,7 +3430,7 @@ Compressor.prototype.compress = function(node) {
}
function can_drop_abort(ab) {
if (ab instanceof AST_Return) return in_lambda && is_return_void(ab.value);
if (ab instanceof AST_Return) return in_lambda && is_undefined(ab.value);
if (!(ab instanceof AST_LoopControl)) return false;
var lct = compressor.loopcontrol_target(ab);
if (ab instanceof AST_Continue) return match_target(loop_body(lct));
@@ -3481,9 +3477,7 @@ Compressor.prototype.compress = function(node) {
block = last.body;
}
block.pop();
if (ab.value) block.push(make_node(AST_SimpleStatement, ab.value, {
body: ab.value.expression
}));
if (ab.value) block.push(make_node(AST_SimpleStatement, ab.value, { body: ab.value }));
return body;
}
@@ -4000,7 +3994,8 @@ Compressor.prototype.compress = function(node) {
}
function is_undefined(node, compressor) {
return node.is_undefined
return node == null
|| node.is_undefined
|| node instanceof AST_Undefined
|| node instanceof AST_UnaryPrefix
&& node.operator == "void"
@@ -9915,7 +9910,7 @@ Compressor.prototype.compress = function(node) {
if (argname instanceof AST_DefaultValue) {
if (!has_default) has_default = 1;
var arg = has_default == 1 && self.args[index];
if (arg && !is_undefined(arg)) has_default = 2;
if (!is_undefined(arg)) has_default = 2;
if (has_arg_refs(fn, argname.value)) return false;
argname = argname.name;
}
@@ -13176,7 +13171,6 @@ Compressor.prototype.compress = function(node) {
if (!no_return) {
if (async) scan_local_returns(inlined, function(node) {
var value = node.value;
if (!value) return;
if (is_undefined(value)) return;
node.value = make_node(AST_Await, call, { expression: value });
});
@@ -13320,10 +13314,7 @@ Compressor.prototype.compress = function(node) {
if (!no_return) scan_local_returns(inlined, function(node) {
node.in_bool = false;
var value = node.value;
if (op == "void") {
if (!value) return;
if (is_undefined(value)) return;
}
if (op == "void" && is_undefined(value)) return;
node.value = make_node(AST_UnaryPrefix, self, {
operator: op,
expression: value || make_node(AST_Undefined, node).transform(compressor),
@@ -13371,8 +13362,7 @@ Compressor.prototype.compress = function(node) {
OPT(AST_Return, function(self, compressor) {
var value = self.value;
if (compressor.option("side_effects")
&& value
if (value && compressor.option("side_effects")
&& is_undefined(value, compressor)
&& !in_async_generator(compressor.find_parent(AST_Scope))) {
self.value = null;