consistently reduce const safe literals (#2411)

fixes #2406
2017-10-28 11:36:44 +08:00
parent 6ab73c7bd5
commit 6371e2ee63
2 changed files with 86 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -320,7 +320,7 @@ merge(Compressor.prototype, {
                        d.fixed = false;
                    } else {
                        var value = node.fixed_value();
-                        if (unused) {
+                        if (unused && !compressor.exposed(d)) {
                            d.single_use = value
                                && d.references.length == 1
                                && loop_ids[d.id] === in_loop