[wasm] Implement parallel compilation.

test/mjsunit/wasm/calls.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --expose-wasm
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
 
-function assertModule(module, memsize) {
-  // Check the module exists.
-  assertFalse(module === undefined);
-  assertFalse(module === null);
-  assertFalse(module === 0);
-  assertEquals("object", typeof module);
-
-  // Check the memory is an ArrayBuffer.
-  var mem = module.exports.memory;
-  assertFalse(mem === undefined);
-  assertFalse(mem === null);
-  assertFalse(mem === 0);
-  assertEquals("object", typeof mem);
-  assertTrue(mem instanceof ArrayBuffer);
-  for (var i = 0; i < 4; i++) {
-    module.exports.memory = 0;  // should be ignored
-    assertEquals(mem, module.exports.memory);
-  }
-
-  assertEquals(memsize, module.exports.memory.byteLength);
-}
-
-function assertFunction(module, func) {
-  assertEquals("object", typeof module.exports);
-
-  var exp = module.exports[func];
-  assertFalse(exp === undefined);
-  assertFalse(exp === null);
-  assertFalse(exp === 0);
-  assertEquals("function", typeof exp);
-  return exp;
-}
-
 (function I64SubTest() {
 
   var builder = new WasmModuleBuilder();
 
   builder.addMemory(1, 1, true);
   builder.addFunction("sub", kSig_l_ll)
     .addBody([           // --
       kExprGetLocal, 0,  // --
       kExprGetLocal, 1,  // --
       kExprI64Sub])      // --
@@ skipping 65 matching lines @@
     .exportFunc();
 
   var module = builder.instantiate();
   assertModule(module, kPageSize * kPages);
 
   var flt = assertFunction(module, "flt");
   assertEquals(1, flt(-2, -1));
   assertEquals(0, flt(7.3, 7.1));
   assertEquals(1, flt(7.1, 7.3));
 })();