From b33e7f88e60f886ee3403c82ac2e3fb40caa698f Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Sun, 5 Mar 2017 13:09:27 +0800
Subject: improve `unsafe` on undefined (#1548)

`unsafe` turns undefined keyword into a variable of the same name if found, but that interferes with other related optimisations.

Keep track of such transformations to ensure zero information loss in the process.
---
 test/compress/issue-1443.js | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

(limited to 'test/compress/issue-1443.js')

diff --git a/test/compress/issue-1443.js b/test/compress/issue-1443.js
index a2565872..304a71ac 100644
--- a/test/compress/issue-1443.js
+++ b/test/compress/issue-1443.js
@@ -2,6 +2,7 @@
 
 unsafe_undefined: {
     options = {
+        conditionals: true,
         if_return: true,
         unsafe: true
     }
@@ -19,12 +20,7 @@ unsafe_undefined: {
     expect: {
         function f(n) {
             return function() {
-                if (a)
-                    return b;
-                if (c)
-                    return d;
-                else
-                    return n;
+                return a ? b : c ? d : n;
             };
         }
     }
@@ -32,6 +28,7 @@ unsafe_undefined: {
 
 keep_fnames: {
     options = {
+        conditionals: true,
         if_return: true,
         unsafe: true
     }
@@ -57,12 +54,7 @@ keep_fnames: {
                 function n(n) {
                     return n * n;
                 }
-                if (a)
-                    return b;
-                if (c)
-                    return d;
-                else
-                    return r;
+                return a ? b : c ? d : r;
             };
         }
     }
-- 
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