Support blocks in asm->wasm global section.

test/mjsunit/wasm/asm-wasm.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
 
 function EmptyTest() {
   "use asm";
   function caller() {
     empty();
@@ skipping 1204 matching lines @@
   m.storeb(22, 77);
   assertEquals(123, m.load(20));
   assertEquals(42, m.load(21));
   assertEquals(77, m.load(22));
   assertEquals(123, m.iload(0));
   assertEquals(42, m.iload(4));
   assertEquals(77, m.iload(8));
 })();
 
 
+(function TestGlobalBlock() {
+  function Module(stdlib, foreign, buffer) {
+    "use asm";
+
+    var x = foreign.x | 0, y = foreign.y | 0;
+
+    function test() {
+      return (x + y) | 0;
+    }
+
+    return {test: test};
+  }
+
+  var m = _WASMEXP_.instantiateModuleFromAsm(
+      Module.toString(), { x: 4, y: 11 });
+  m.__init__();
+  assertEquals(15, m.test());
+})();
+
+
 (function TestComma() {
   function CommaModule() {
     "use asm";
 
     function ifunc(a, b) {
       a = +a;
       b = b | 0;
       return (a, b) | 0;
     }
 
     function dfunc(a, b) {
       a = a | 0;
       b = +b;
       return +(a, b);
     }
 
     return {ifunc: ifunc, dfunc: dfunc};
   }
 
   var m = _WASMEXP_.instantiateModuleFromAsm(CommaModule.toString());
   assertEquals(123, m.ifunc(456.7, 123));
   assertEquals(123.4, m.dfunc(456, 123.4));
 })();