Refactor module builder

test/mjsunit/wasm/adapter-frame.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");
 
 const JS = false;  // for testing the tests.
 const WRONG1 = 0x0DEDFACE;
 const WRONG2 = 0x0DEDBABE;
 const WRONG3 = 0x0DEDD011
 
 function makeSelect(type, args, which) {
   if (JS) {
     // For testing the tests.
     return function() {
       var val = +arguments[which];
       print("  " + val);
       if (type == kAstI32) return val | 0;
       if (type == kAstF32) return Math.fround(val);
       if (type == kAstF64) return val;
       return undefined;
     }
   }
 
   var builder = new WasmModuleBuilder();
-  var sig = new Array();
-  sig.push(args);
-  for (var i = 0; i < args; i++) sig.push(type);
-  sig.push(1);
-  sig.push(type);
-  builder.addFunction("select", sig)
+  var params = [];
+  for (var i = 0; i < args; i++) params.push(type);
+  builder.addFunction("select", makeSig(params, [type]))
     .addBody([kExprGetLocal, which])
     .exportFunc();
 
   return builder.instantiate().exports.select;
 }
 
 const inputs = [
   -1, 0, 2.2, 3.3, 3000.11, Infinity, -Infinity, NaN
 ];
 
@@ skipping 269 matching lines @@
     assertEquals(C(val), select(WRONG1, WRONG2, val));
 
     // under args
     assertEquals(C(undefined), select());
     assertEquals(C(undefined), select(0xDEDFACE));
     assertEquals(C(undefined), select(WRONG1, WRONG2));
     // over args
     assertEquals(C(val), select(WRONG1, WRONG2, val, WRONG3));
   }
 })();