do not track eliminatable variables from inside a switch to outside

tools/eliminator/asm-eliminator-test-output.js

@@ -108,6 +108,30 @@ function switchy() {
   break;
  }
 }
+function switchy2($inFormat) {
+ $inFormat = $inFormat | 0;
+ var label = 0;
+ switch ($inFormat | 0) {
+ case 14:
+  {
+   return 5;
+  }
+ case 10:
+ case 11:
+ case 12:
+ case 22:
+  {
+   label = 4;
+   break;
+  }
+ default:
+  {}
+ }
+ if ((label | 0) == 4) {
+  return 8;
+ }
+ return 1;
+}
 function tempDouble(a) {
  a = +a;
  f(a * a);

tools/eliminator/asm-eliminator-test.js

@@ -149,6 +149,31 @@ function switchy() {
    break;
  }
 }
+function switchy2($inFormat) {
+ $inFormat = $inFormat | 0;
+ var label = 0;
+ switch ($inFormat | 0) {
+ case 14:
+  {
+   return 5;
+   break;
+  }
+ case 10:
+ case 11:
+ case 12:
+ case 22:
+  {
+   label = 4;
+   break;
+  }
+ default:
+  {}
+ }
+ if ((label | 0) == 4) {
+  return 8;
+ }
+ return 1;
+}
 function tempDouble(a) {
  a = +a;
  var x = +0, y = +0;

tools/js-optimizer.js

@@ -3909,6 +3909,7 @@ function eliminate(ast, memSafe) {
               }
             }
           }
+          tracked = {}; // do not track from inside the switch to outside
         } else {
           if (!(type in ABORTING_ELIMINATOR_SCAN_NODES)) {
             printErr('unfamiliar eliminator scan node: ' + JSON.stringify(node));