drop unused function

diff --git a/lib/compress.js b/lib/compress.js
index 2f28654..7440a5b 100644 (file)
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -317,124 +317,6 @@ function Compressor(options, false_by_default) {
             return ret;
         };
 
-        /// XXX: this function is UGLY and kinda wrong.
-        ///      I think it would be cleaner if it operates backwards.
-        function handle_if_return_2(statements, compressor) {
-            var self = compressor.self();
-            var in_lambda = self instanceof AST_Lambda;
-            var last = statements.length - 1;
-            return MAP(statements, function(stat, i){
-                if (stat instanceof AST_If
-                    && stat.body instanceof AST_Continue
-                    && !stat.alternative
-                    && self === stat.body.target()) {
-                    CHANGED = true;
-                    if (i < last) {
-                        var rest = statements.slice(i + 1);
-                        var cond = stat.condition;
-                        while (rest[0] instanceof AST_If
-                               && rest[0].body instanceof AST_Continue
-                               && self === rest[0].body.target()
-                               && !rest[0].alternative) {
-                            cond = make_node(AST_Binary, rest[0], {
-                                operator: "||",
-                                left: cond,
-                                right: rest[0].condition
-                            });
-                            rest.shift();
-                        }
-                        return MAP.last(make_node(AST_If, stat, {
-                            condition: cond.negate(compressor),
-                            body: make_node(AST_BlockStatement, stat, {
-                                body: rest
-                            }).optimize(compressor)
-                        }).optimize(compressor))
-                    } else {
-                        return make_node(AST_SimpleStatement, stat, {
-                            body: stat.condition
-                        }).optimize(compressor);
-                    }
-                }
-                if (stat instanceof AST_If
-                    && stat.body instanceof AST_Return
-                    && !stat.alternative
-                    && in_lambda) {
-                    if (!stat.body.value) {
-                        CHANGED = true;
-                        if (i < last) {
-                            var rest = statements.slice(i + 1);
-                            var cond = stat.condition;
-                            while (rest[0] instanceof AST_If
-                                   && rest[0].body instanceof AST_Return
-                                   && !rest[0].body.value
-                                   && !rest[0].alternative) {
-                                cond = make_node(AST_Binary, rest[0], {
-                                    operator: "||",
-                                    left: cond,
-                                    right: rest[0].condition
-                                });
-                                rest.shift();
-                            }
-                            return MAP.last(make_node(AST_If, stat, {
-                                condition: cond.negate(compressor),
-                                body: make_node(AST_BlockStatement, stat, {
-                                    body: rest
-                                }).optimize(compressor)
-                            }).optimize(compressor));
-                        } else {
-                            return make_node(AST_SimpleStatement, stat, {
-                                body: stat.condition
-                            }).optimize(compressor);
-                        }
-                    } else if (i == last && last > 0
-                               && statements[last - 1] instanceof AST_If
-                               && statements[last - 1].body instanceof AST_Return
-                               && !statements[last - 1].alternative) {
-                        CHANGED = true;
-                        return MAP.splice([ stat, make_node(AST_Return, stat, {
-                            value: make_node(AST_Undefined, stat).optimize(compressor)
-                        }).optimize(compressor)]);
-                    }
-                }
-                if (stat instanceof AST_If
-                    && stat.body instanceof AST_Exit
-                    && stat.body.value
-                    && !stat.alternative
-                    && i < last
-                    && statements[i + 1].TYPE == stat.body.TYPE
-                    && statements[i + 1].value) {
-                    CHANGED = true;
-                    return MAP.last(make_node(AST_If, stat, {
-                        condition: stat.condition,
-                        body: stat.body,
-                        alternative: statements[i + 1]
-                    }).optimize(compressor));
-                }
-                if (stat instanceof AST_If
-                    && stat.alternative instanceof AST_Exit) {
-                    CHANGED = true;
-                    return MAP.last(MAP.splice([
-                        // 1. negate IF and put the exit in the consequent
-                        make_node(AST_If, stat, {
-                            condition: stat.condition.negate(compressor),
-                            body: stat.alternative
-                        }),
-                        // 2. the IF body can now go outside the if
-                        stat.body
-                        // and 3. add the rest of the statements
-                    ].concat(statements.slice(i + 1))));
-                    return MAP.last(make_node(AST_If, stat, {
-                        condition: stat.condition.negate(compressor),
-                        body: stat.alternative,
-                        alternative: make_node(AST_BlockStatement, stat.body, {
-                            body: [ stat.body ].concat(statements.slice(i + 1))
-                        })
-                    }).optimize(compressor));
-                }
-                return stat;
-            });
-        };
-
         function eliminate_dead_code(statements, compressor) {
             var has_quit = false;
             return statements.reduce(function(a, stat){