From 9b6bc67c3393507d0621eb3debbe8845b0eff52d Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Tue, 4 Apr 2017 23:48:22 +0800
Subject: optimise `do{...}while(false)` (#1785)

- better heuristics to avoid issues like #1532
- fix `TreeWalker.loopcontrol_target()`
  - `continue` cannot refer to `switch` blocks
---
 test/compress/loops.js | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

(limited to 'test')

diff --git a/test/compress/loops.js b/test/compress/loops.js
index c8d77840..f13f5cc5 100644
--- a/test/compress/loops.js
+++ b/test/compress/loops.js
@@ -215,8 +215,7 @@ evaluate: {
             a();
         for(;;)
             c();
-        // rule disabled due to issue_1532
-        do d(); while (false);
+        d();
     }
 }
 
@@ -458,3 +457,26 @@ issue_1648: {
     }
     expect_exact: "function f(){for(x();1;);}"
 }
+
+do_switch: {
+    options = {
+        evaluate: true,
+        loops: true,
+    }
+    input: {
+        do {
+            switch (a) {
+              case b:
+                continue;
+            }
+        } while (false);
+    }
+    expect: {
+        do {
+            switch (a) {
+              case b:
+                continue;
+            }
+        } while (false);
+    }
+}
-- 
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