if (compressor.option("dead_code")) {
if (self.left instanceof AST_PropAccess) {
if (self.operator == "=") {
+ if (self.left.equivalent_to(self.right)
+ && (self.left instanceof AST_Dot || !self.left.property.has_side_effects(compressor))) {
+ return self.right;
+ }
var exp = self.left.expression;
if (exp instanceof AST_Lambda
|| !compressor.has_directive("use strict")
}
}
} else if (self.left instanceof AST_SymbolRef) {
+ if (self.operator == "=" && self.left.equivalent_to(self.right)) return self.right;
if (self.left.is_immutable()) return strip_assignment();
var def = self.left.definition();
var scope = def.scope.resolve();
}
expect_stdout: "PASS PASS"
}
+
+self_assignments: {
+ options = {
+ dead_code: true,
+ }
+ input: {
+ var a = "PASS", b = 0, l = [ "FAIL", "PASS" ], o = { p: "PASS" };
+ a = a;
+ l[0] = l[0];
+ l[b] = l[b];
+ l[b++] = l[b++];
+ o.p = o.p;
+ console.log(a, b, l[0], o.p);
+ }
+ expect: {
+ var a = "PASS", b = 0, l = [ "FAIL", "PASS" ], o = { p: "PASS" };
+ a;
+ l[0];
+ l[b];
+ l[b++] = l[b++];
+ o.p;
+ console.log(a, b, l[0], o.p);
+ }
+ expect_stdout: "PASS 2 PASS PASS"
+}