function get_lvalues(expr) {
var lvalues = new Dictionary();
if (expr instanceof AST_VarDef) lvalues.add(expr.name.name, lhs);
+ var find_arguments = scope.uses_arguments && !compressor.has_directive("use strict");
var scan_toplevel = scope instanceof AST_Toplevel;
var tw = new TreeWalker(function(node) {
var value;
} else if (node instanceof AST_This) {
value = node;
}
- if (value) {
- lvalues.add(node.name, is_modified(compressor, tw, node, value, 0));
- } else if (scan_toplevel) {
- if (node.TYPE == "Call") {
- if (modify_toplevel) return;
- var exp = node.expression;
- if (exp instanceof AST_PropAccess) return;
- if (exp instanceof AST_Function && !exp.contains_this()) return;
- modify_toplevel = true;
- } else if (node instanceof AST_PropAccess && may_be_global(node.expression)) {
- if (node === lhs && !(expr instanceof AST_Unary)) {
- modify_toplevel = true;
- } else {
- read_toplevel = true;
+ if (value) lvalues.add(node.name, is_modified(compressor, tw, node, value, 0));
+ if (find_arguments && node instanceof AST_Sub) {
+ scope.argnames.forEach(function(argname) {
+ if (!compressor.option("reduce_vars") || argname.definition().assignments) {
+ lvalues.add(argname.name, true);
}
+ });
+ find_arguments = false;
+ }
+ if (!scan_toplevel) return;
+ if (node.TYPE == "Call") {
+ if (modify_toplevel) return;
+ var exp = node.expression;
+ if (exp instanceof AST_PropAccess) return;
+ if (exp instanceof AST_Function && !exp.contains_this()) return;
+ modify_toplevel = true;
+ } else if (node instanceof AST_PropAccess && may_be_global(node.expression)) {
+ if (node === lhs && !(expr instanceof AST_Unary)) {
+ modify_toplevel = true;
+ } else {
+ read_toplevel = true;
}
}
});