if (self.left instanceof AST_PropAccess) {
if (self.operator == "=") {
if (self.__drop) {
- var props = [];
- flatten(self.left, props);
- flatten(self.right, props);
- return props.length == 0 ? make_node(AST_Number, self, {
- value: 0
- }) : make_sequence(self, props).optimize(compressor);
+ var exprs = [ self.left.expression ];
+ if (self.left instanceof AST_Sub) exprs.push(self.left.property);
+ exprs.push(self.right);
+ return make_sequence(self, exprs).optimize(compressor);
}
if (self.left.equivalent_to(self.right) && !self.left.has_side_effects(compressor)) {
return self.right;
}
return try_evaluate(compressor, self);
- function flatten(node, props) {
- if (!(node.expression instanceof AST_SymbolRef)) props.push(node.expression);
- if (node instanceof AST_Sub) props.push(node.property);
- }
-
function in_try(level, node) {
var right = self.right;
self.right = make_node(AST_Null, right);
}
expect: {
var i = 0, l = [ "FAIL", "PASS" ];
+ l[0];
+ l[0];
l[0] = l[1];
console.log(l[0], 2);
}
expect_stdout: "PASS 2"
}
+self_assignments_6: {
+ options = {
+ dead_code: true,
+ pure_getters: "strict",
+ reduce_vars: true,
+ side_effects: true,
+ toplevel: true,
+ }
+ input: {
+ var o = {
+ p: "PASS",
+ };
+ console.log(o.p = o.p);
+ }
+ expect: {
+ var o = {
+ p: "PASS",
+ };
+ console.log(o.p);
+ }
+ expect_stdout: "PASS"
+}
+
issue_3967: {
options = {
dead_code: true,