[wasm] Support undefined indirect table entries, behind a flag.

test/mjsunit/wasm/default-func-call2.js

Index: test/mjsunit/wasm/default-func-call2.js
diff --git a/test/mjsunit/wasm/indirect-calls.js b/test/mjsunit/wasm/default-func-call2.js
similarity index 61%
copy from test/mjsunit/wasm/indirect-calls.js
copy to test/mjsunit/wasm/default-func-call2.js
index 80bee412e028541e3b54ba7a175a512cb8293e77..af4e9724950485dcae2bad6d0eb810af3159cc8e 100644
--- a/test/mjsunit/wasm/indirect-calls.js
+++ b/test/mjsunit/wasm/default-func-call2.js
@@ -1,8 +1,10 @@
 // Copyright 2015 the V8 project authors. All rights reserved.
+//

[bradn, 2016/06/16 08:00:20]

Extra line.
Separate file?

 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --expose-wasm
+// Flags: --wasm-jit-prototpe
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
@@ -22,6 +24,16 @@ var module = (function () {
       kExprGetLocal, 1,             // --
       kExprI32Sub,                  // --
     ]);
+  builder.appendToFunctionTable([0, 1]);
+  for (var i = 0; i < 2000; i++) {
+    builder.addFunction("sub".concat(i.toString()), sig_index)
+      .addBody([
+        kExprGetLocal, 0,
+        kExprGetLocal, 1,
+        kExprI32Sub,
+      ]);
+    builder.appendToFunctionTable([i + 2]);
+  }
   builder.addFunction("main", kSig_i_iii)
     .addBody([
       kExprGetLocal, 0,
@@ -30,7 +42,7 @@ var module = (function () {
       kExprCallIndirect, kArity2, sig_index
     ])
     .exportFunc()
-  builder.appendToFunctionTable([0, 1, 2]);
+  builder.appendToFunctionTable([2002]);
 
   return builder.instantiate({add: function(a, b) { return a + b | 0; }});
 })();
@@ -45,5 +57,10 @@ assertEquals("function", typeof module.exports.main);
 assertEquals(5, module.exports.main(1, 12, 7));
 assertEquals(19, module.exports.main(0, 12, 7));
 
-assertTraps(kTrapFuncSigMismatch, "module.exports.main(2, 12, 33)");
-assertTraps(kTrapFuncInvalid, "module.exports.main(3, 12, 33)");
+assertTraps(kTrapFuncSigMismatch, "module.exports.main(2002, 12, 33)");
+assertTraps(kTrapFuncInvalid, "module.exports.main(-1, 12, 33)");
+assertTraps(kTrapFuncInvalid, "module.exports.main(2003, 12, 33)");
+assertTraps(kTrapFuncInvalid, "module.exports.main(4005, 12, 33)");
+assertTraps(kTrapFuncInvalid, "module.exports.main(4006, 12, 33)");
+assertTraps(kTrapFuncInvalid, "module.exports.main(4004, 12, 33)");
+assertTraps(kTrapFuncInvalid, "module.exports.main(100000, 12, 33)");