no base54.reset()
slightly less improved gzip results
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alexlamsl
parent
13062a4758
commit
423d0146be
60
lib/scope.js
60
lib/scope.js
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@ -458,9 +458,7 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
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this.walk(tw);
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to_mangle.forEach(function(def){ def.mangle(options) });
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if (options.group_voids) {
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base54.reset();
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base54.sort();
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if (!options.group_voids) return;
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if (options.toplevel) this.group_voids(options);
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else this.walk(new TreeWalker(function(node) {
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if (node instanceof AST_Scope && !(node instanceof AST_Toplevel)) {
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@ -468,7 +466,6 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
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return true;
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}
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}));
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}
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function collect(symbol) {
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if (!member(symbol.name, options.reserved)) {
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@ -477,11 +474,11 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options){
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}
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});
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AST_Scope.DEFMETHOD("find_colliding_names", function(options, all) {
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AST_Toplevel.DEFMETHOD("find_colliding_names", function(options) {
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var cache = options.cache && options.cache.props;
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var avoid = Object.create(null);
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options.reserved.forEach(to_avoid);
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if (this.globals) this.globals.each(add_def);
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this.globals.each(add_def);
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this.walk(new TreeWalker(function(node) {
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if (node instanceof AST_Scope) node.variables.each(add_def);
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if (node instanceof AST_SymbolCatch) add_def(node.definition());
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@ -493,9 +490,9 @@ AST_Scope.DEFMETHOD("find_colliding_names", function(options, all) {
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}
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function add_def(def) {
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var name = def.mangled_name || def.name;
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var name = def.name;
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if (def.global && cache && cache.has(name)) name = cache.get(name);
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else if (!all && !def.unmangleable(options)) return;
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else if (!def.unmangleable(options)) return;
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to_avoid(name);
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}
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});
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@ -536,27 +533,38 @@ AST_Toplevel.DEFMETHOD("expand_names", function(options) {
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});
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AST_Scope.DEFMETHOD("group_voids", function(options) {
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var avoid = this.find_colliding_names(options, true);
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var cname = 0;
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var name;
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do {
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name = base54(cname++);
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} while (avoid[name] || !is_identifier(name));
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var count = 0;
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this.transform(new TreeTransformer(function(node) {
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if (node instanceof AST_Undefined
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|| node instanceof AST_UnaryPrefix
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&& node.operator == "void"
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&& node.expression.is_constant()) {
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var self = this, enclosed = [];
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var scopes = [], count = 0;
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self.walk(new TreeWalker(function(node, descend) {
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if (node instanceof AST_Scope && node !== self) {
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scopes.unshift(node);
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descend();
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if (scopes[0] === node) scopes.shift();
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return true;
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}
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if (count > 0 && scopes.length == 0) return;
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if (is_undefined(node)) {
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count++;
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return new AST_SymbolRef({
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var scope;
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while (scope = scopes.shift()) {
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scope.enclosed.forEach(function(def) {
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push_uniq(enclosed, def);
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});
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}
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}
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}));
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if (count < 1) return;
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var save = self.enclosed;
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self.enclosed = enclosed;
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var name = next_mangled(self, options);
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self.enclosed = save;
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this.transform(new TreeTransformer(function(node) {
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if (is_undefined(node)) return new AST_SymbolRef({
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name: name,
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start: node.start,
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end: node.end
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});
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}
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}));
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if (count) {
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for (var i = 0, len = this.body.length; i < len; i++) {
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var stat = this.body[i];
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if (stat instanceof AST_Var) {
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@ -569,6 +577,12 @@ AST_Scope.DEFMETHOD("group_voids", function(options) {
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start: this.start,
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end: this.end
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}));
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function is_undefined(node) {
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return node instanceof AST_Undefined
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|| node instanceof AST_UnaryPrefix
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&& node.operator == "void"
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&& node.expression.is_constant();
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}
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function make_var_def(node) {
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@ -26,13 +26,13 @@ group_voids: {
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console.log(void 0);
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for (var a = 4;;);
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var b = 4;
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function f5() {
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function g() {
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var c = 5;
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var d = 5;
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console.log(void 0);
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}
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}
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function f6() {
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function f5() {
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try {
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var a = 6;
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console.log(void 0);
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@ -47,35 +47,35 @@ group_voids: {
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if (void 0 === b)
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c = void 0;
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function f1() {
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var o = 1, a;
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console.log(a);
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var o = 1, n;
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console.log(n);
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}
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function f2(o) {
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var n = 2, a;
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console.log(a);
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var n = 2, v;
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console.log(v);
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}
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function f3() {
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var o = 3, a;
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console.log(a);
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var o = 3, n;
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console.log(n);
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}
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function f4() {
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console.log(a);
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console.log(i);
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for(var o = 4;;);
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var n = 4, a;
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var n = 4, i;
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function v() {
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var o = 5;
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var n = 5;
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console.log(a);
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console.log(i);
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}
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}
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function f6() {
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function f5() {
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try {
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var o = 6;
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console.log(a);
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console.log(n);
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} catch (o) {
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console.log(a);
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console.log(n);
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}
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var a;
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var n;
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}
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}
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}
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@ -108,13 +108,13 @@ group_voids_toplevel: {
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console.log(void 0);
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for (var a = 4;;);
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var b = 4;
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function f5() {
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function g() {
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var c = 5;
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var d = 5;
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console.log(void 0);
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}
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}
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function f6() {
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function f5() {
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try {
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var a = 6;
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console.log(void 0);
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@ -168,8 +168,7 @@ group_voids_catch: {
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group_voids: true,
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}
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input: {
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f();
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function f() {
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(function() {
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var a = 1;
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console.log(void 0);
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try {
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@ -177,19 +176,18 @@ group_voids_catch: {
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} catch (undefined) {
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console.log(void 0);
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}
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}
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})();
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}
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expect: {
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f();
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function f() {
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var o = 1, a;
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console.log(a);
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(function() {
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var o = 1, c;
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console.log(c);
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try {
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throw "FAIL";
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} catch (o) {
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console.log(a);
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}
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console.log(c);
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}
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})();
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}
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expect_stdout: [
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"undefined",
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