JoBoEVD/UglifyJS
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remove unused AST_Scope.nesting & AST_SymbolRef.frame

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they are computed but never used

closes #1444
This commit is contained in:
alexlamsl
2017-02-18 18:59:40 +08:00
parent 11676f9d72
commit 686a496b1c
1 changed files with 4 additions and 7 deletions
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11
lib/scope.js
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@@ -98,25 +98,24 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
var labels = new Dictionary(); var labels = new Dictionary();
var defun = null; var defun = null;
var last_var_had_const_pragma = false; var last_var_had_const_pragma = false;
var nesting = 0;
var tw = new TreeWalker(function(node, descend){ var tw = new TreeWalker(function(node, descend){
if (options.screw_ie8 && node instanceof AST_Catch) { if (options.screw_ie8 && node instanceof AST_Catch) {
var save_scope = scope; var save_scope = scope;
scope = new AST_Scope(node); scope = new AST_Scope(node);
scope.init_scope_vars(nesting); scope.init_scope_vars();
scope.parent_scope = save_scope; scope.parent_scope = save_scope;
descend(); descend();
scope = save_scope; scope = save_scope;
return true; return true;
} }
if (node instanceof AST_Scope) { if (node instanceof AST_Scope) {
node.init_scope_vars(nesting); node.init_scope_vars();
var save_scope = node.parent_scope = scope; var save_scope = node.parent_scope = scope;
var save_defun = defun; var save_defun = defun;
var save_labels = labels; var save_labels = labels;
defun = scope = node; defun = scope = node;
labels = new Dictionary(); labels = new Dictionary();
++nesting; descend(); --nesting; descend();
scope = save_scope; scope = save_scope;
defun = save_defun; defun = save_defun;
labels = save_labels; labels = save_labels;
@@ -244,7 +243,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
} }
}); });
AST_Scope.DEFMETHOD("init_scope_vars", function(nesting){ AST_Scope.DEFMETHOD("init_scope_vars", function(){
this.variables = new Dictionary(); // map name to AST_SymbolVar (variables defined in this scope; includes functions) this.variables = new Dictionary(); // map name to AST_SymbolVar (variables defined in this scope; includes functions)
this.functions = new Dictionary(); // map name to AST_SymbolDefun (functions defined in this scope) this.functions = new Dictionary(); // map name to AST_SymbolDefun (functions defined in this scope)
this.uses_with = false; // will be set to true if this or some nested scope uses the `with` statement this.uses_with = false; // will be set to true if this or some nested scope uses the `with` statement
@@ -252,7 +251,6 @@ AST_Scope.DEFMETHOD("init_scope_vars", function(nesting){
this.parent_scope = null; // the parent scope this.parent_scope = null; // the parent scope
this.enclosed = []; // a list of variables from this or outer scope(s) that are referenced from this or inner scopes this.enclosed = []; // a list of variables from this or outer scope(s) that are referenced from this or inner scopes
this.cname = -1; // the current index for mangling functions/variables this.cname = -1; // the current index for mangling functions/variables
this.nesting = nesting; // the nesting level of this scope (0 means toplevel)
}); });
AST_Lambda.DEFMETHOD("init_scope_vars", function(){ AST_Lambda.DEFMETHOD("init_scope_vars", function(){
@@ -278,7 +276,6 @@ AST_SymbolRef.DEFMETHOD("reference", function(options) {
} }
s = s.parent_scope; s = s.parent_scope;
} }
this.frame = this.scope.nesting - def.scope.nesting;
}); });
AST_Scope.DEFMETHOD("find_variable", function(name){ AST_Scope.DEFMETHOD("find_variable", function(name){