Added a redundant-variable eliminator script and its dependencies.

Author: max99x

tools/eliminator/eliminator-test-output.js

@@ -0,0 +1,37 @@
+function f() {
+  
+  
+  
+  
+  HEAP[123] = (GLOB[1] + 1) / 2;
+}
+var g = function(a1, a2) {
+  var __label__;
+  var a = 1;
+  
+  var c = a * 2 - 1;
+  
+  a++;
+  foo(c);
+  
+  foo(2);
+  for (var i = 0; i < 5; i++) {
+    var q = {
+      a: 1
+    } + [ 2, 3 ];
+  }
+  for (var iterator in SOME_GLOBAL) {
+    quux(iterator);
+  }
+  var $0 = HEAP[5];
+  HEAP[myglobal] = 123;
+  
+  if ($0 < 0) {
+    __label__ = 1;
+  } else {
+    __label__ = 2;
+  }
+  var sadijn = new asd;
+  sadijn2 = "qwe%sert";
+  this.Module || (this.Module = {});
+};

tools/eliminator/eliminator-test.js

@@ -0,0 +1,35 @@
+function f() {
+  var __label__;
+  var x = GLOB[1];
+  var y = x + 1;
+  var z = y / 2;
+  HEAP[123] = z;
+}
+var g = function (a1, a2) {
+  var __label__;
+  var a = 1;
+  var b = a * 2;
+  var c = b - 1;
+  var qqq = "qwe";
+  a++;
+  foo(c);
+  var ww = 1, www, zzz = 2;
+  foo(zzz);
+  for (var i = 0; i < 5; i++) {
+    var q = {a:1} + [2,3];
+  }
+  for (var iterator in SOME_GLOBAL) {
+    quux(iterator);
+  }
+  var $0 = HEAP[5];
+  HEAP[myglobal] = 123;
+  var $1 = $0 < 0;
+  if ($1) {
+    __label__ = 1;
+  } else {
+    __label__ = 2;
+  }
+  var sadijn = new asd;
+  sadijn2 = "qwe%sert";
+  this.Module || (this.Module = {});
+}