Use ESTree-based optimizer for core JS passes, to support ES6+ inputs

tests/optimizer/AJSDCE-output.js

@@ -1,15 +1,20 @@
-
 var z = fleefl();
+
 var zz = fleefl();
+
 function g(a) {
  return a + 1;
 }
+
 Module["g"] = g;
+
 function h(a) {
  return a + 1;
 }
+
 print(h(123));
-((function() {
+
+(function() {
  var z = fleefl();
  var zz = fleefl();
  function g(a) {
@@ -20,8 +25,9 @@ print(h(123));
   return a + 1;
  }
  print(hh(123));
-}))();
+})();
+
 function glue() {
 }
-glue();
 
+glue();

tests/optimizer/JSDCE-fors-output.js

@@ -0,0 +1,3 @@
+for (var i in x) {}
+
+for (var j = 0; ;) {}

tests/optimizer/JSDCE-fors.js

@@ -0,0 +1,4 @@
+
+for (var i in x) {}
+for (var j = 0;;) {}
+

tests/optimizer/JSDCE-hasOwnProperty-output.js

@@ -1,6 +1,7 @@
 function hasOwnProperty(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
 }
+
 if (hasOwnProperty({}, "prop_name")) {
  console.log("yeah");
 }

tests/optimizer/JSDCE-output.js

@@ -1,19 +1,26 @@
-
 var z = fleefl();
+
 var zz = fleefl();
+
 var keeperObj = {
  x: fleefl()
 };
+
 var keeperArray = [ 1, 2, "3", four() ];
+
 function g(a) {
  return a + 1;
 }
+
 Module["g"] = g;
+
 function h(a) {
  return a + 1;
 }
+
 print(h(123));
-((function() {
+
+(function() {
  var z = fleefl();
  var zz = fleefl();
  function g(a) {
@@ -24,31 +31,38 @@ print(h(123));
   return a + 1;
  }
  print(hh(123));
-}))();
+})();
+
 function glue() {
  function lookup() {
   throw 1;
  }
 }
+
 glue();
+
 function _glCreateShader() {
  return 1;
 }
+
 function emulate() {
  _glCreateShader = function _glCreateShader(shaderType) {
   return glCreateShader();
  };
 }
+
 emulate();
+
 ___cxa_find_matching_catch_before();
+
 function ___cxa_find_matching_catch_before() {
  if (!___cxa_find_matching_catch_before.buffer) ___cxa_find_matching_catch_before.buffer = {};
 }
+
 function ___cxa_find_matching_catch_after() {
  if (!___cxa_find_matching_catch_after.buffer) ___cxa_find_matching_catch_after.buffer = {};
 }
-___cxa_find_matching_catch_after();
-var dotOther = Side.effect;
-
 
+___cxa_find_matching_catch_after();
 
+var dotOther = Side.effect;

tests/optimizer/applyDCEGraphRemovals-output.js

@@ -1,26 +1,40 @@
 var name;
+
 var asmLibraryArg = {
  "save1": 1,
  "save2": 2
 };
+
 var expD1 = Module["expD1"] = asm["expD1"];
+
 var expD2 = Module["expD2"] = asm["expD2"];
+
 var expD3 = Module["expD3"] = asm["expD3"];
-var expD4 = undefined;
-var expI1 = Module["expI1"] = (function() {
+
+var expD4;
+
+var expI1 = Module["expI1"] = function() {
  return Module["asm"]["expI1"].apply(null, arguments);
-});
-var expI2 = Module["expI2"] = (function() {
+};
+
+var expI2 = Module["expI2"] = function() {
  return Module["asm"]["expI2"].apply(null, arguments);
-});
-var expI3 = Module["expI3"] = (function() {
+};
+
+var expI3 = Module["expI3"] = function() {
  return Module["asm"]["expI3"].apply(null, arguments);
-});
-var expI4 = undefined;
+};
+
+var expI4;
+
 expD1;
+
 Module["expD2"];
+
 asm["expD3"];
+
 expI1;
+
 Module["expI2"];
-asm["expI3"];
 
+asm["expI3"];

tests/optimizer/applyImportAndExportNameChanges-output.js

@@ -1,4 +1,5 @@
 var name;
+
 var asmLibraryArg = {
  "a": 1,
  "A": 33,
@@ -12,10 +13,9 @@ var asmLibraryArg = {
  "d": ___syscall140,
  "q": ___syscall146
 };
-var expD1 = Module["expD1"] = asm["c"];
-var expI1 = Module["expI1"] = (function() {
- return Module["asm"]["d"].apply(null, arguments);
-});
-
 
+var expD1 = Module["expD1"] = asm["c"];
 
+var expI1 = Module["expI1"] = function() {
+ return Module["asm"]["d"].apply(null, arguments);
+};