JS: improve dead code elimination to handle switch case bodies

2016-11-09 16:30:05 +03:00
parent 22aea1cf12
commit 0015f7518e
4 changed files with 105 additions and 3 deletions
@@ -0,0 +1,35 @@
+function test(x) {
+    var log = "";
+    switch (x) {
+        case 0:
+            log += "0;";
+            break;
+        case 1:
+            return "one";
+        case 2:
+            log += "2;";
+        case 3:
+            log += "3;";
+            break;
+        default:
+            if (x == 4) {
+                log += "four;";
+                break;
+            }
+            else {
+                return "default";
+            }
+    }
+    return log;
+}
+
+function box() {
+    if (test(0) != "0;") return "fail1";
+    if (test(1) != "one") return "fail2";
+    if (test(2) != "2;3;") return "fail3";
+    if (test(3) != "3;") return "fail4";
+    if (test(4) != "four;") return "fail5";
+    if (test(5) != "default") return "fail5";
+
+    return "OK";
+}