if (def.undeclared) return;
if (is_arguments(def)) return;
if (value !== rhs) {
- if (value.is_immutable()) return;
+ if (is_lhs_read_only(value, compressor)) return;
var referenced = def.references.length - def.replaced;
if (referenced < 2) return;
candidate = candidate.clone();
def(AST_Assign, function(compressor) {
var left = this.left;
if (left instanceof AST_PropAccess) {
- if (left.expression.may_throw_on_access(compressor, true)) return this;
- if (compressor.has_directive("use strict") && left.expression.is_constant()) return this;
+ var expr = left.expression;
+ if (expr.may_throw_on_access(compressor, true)) return this;
+ if (compressor.has_directive("use strict") && expr.is_constant()) return this;
}
if (left.has_side_effects(compressor)) return this;
var right = this.right;