fix typeof side effects (#1696)

`statement_to_expression()` drops `typeof` even if it operates on undeclared variables. Since we now have `drop_side_effect_free()`, replace and remove this deprecated functionality.
2017-03-27 04:37:42 +08:00
parent f5952933a0
commit 581630e0a7
3 changed files with 30 additions and 24 deletions
--- a/test/compress/switch.js
+++ b/test/compress/switch.js
@@ -579,3 +579,17 @@ issue_1690_2: {
    }
    expect_stdout: "PASS"
 }
+
+if_switch_typeof: {
+    options = {
+        conditionals: true,
+        dead_code: true,
+        side_effects: true,
+    }
+    input: {
+        if (a) switch(typeof b) {}
+    }
+    expect: {
+        a;
+    }
+}