[wasm] Fix imports with numbers as name

test/mjsunit/wasm/ffi.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 --allow-natives-syntax
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
 
 function testCallFFI(func, check) {
@@ skipping 277 matching lines @@
 }
 
 
 testCallBinopVoid(kAstI32);
 // TODO testCallBinopVoid(kAstI64);
 testCallBinopVoid(kAstF32);
 testCallBinopVoid(kAstF64);
 
 
 
-function testCallPrint() {
+(function testCallPrint() {

[ahaas, 2016/11/16 10:51:18]

All other tests have the style

function name() {}
name();

I think you should keep all tests in this file consistent.

   var builder = new WasmModuleBuilder();
 
   builder.addImport("print", makeSig_v_x(kAstI32));
   builder.addImport("print", makeSig_v_x(kAstF64));
   builder.addFunction("main", makeSig_v_x(kAstF64))
     .addBody([
       kExprI8Const, 97,      // --
       kExprCallFunction, 0,  // --
       kExprGetLocal, 0,      // --
       kExprCallFunction, 1   // --
     ])                       // --
     .exportFunc()
 
   var main = builder.instantiate({print: print}).exports.main;
   for (var i = -9; i < 900; i += 6.125) main(i);
-}
+})();
 
-testCallPrint();
-testCallPrint();
+
+(function testImportNumbers() {

[ahaas, 2016/11/16 10:51:18]

nits: It's a test, you can give it long descriptive names, like
"testImportWithNumberAsName"

+  var builder = new WasmModuleBuilder();
+
+  builder.addImport('0', kSig_v_i);
+
+  builder.instantiate({0: print});
+})();
+
+(function testImportNumbers2() {
+  var builder = new WasmModuleBuilder();
+
+  builder.addImportWithModule('foo', '0', kSig_v_i);
+  builder.addImportWithModule('0', 'foo', kSig_v_i);
+  builder.addImportWithModule('0', '0', kSig_v_i);
+  builder.addImportWithModule('18', '-3', kSig_v_i);
+  builder.addImportWithModule('-3', '18', kSig_v_i);
+
+  builder.instantiate({
+    foo: {0: print},
+    0: {0: print, foo: print},
+    18: {'-3': print},
+    '-3': {18: print}
+  });
+})();