[wasm] Support validation of asm.js modules with != 3 args.

src/runtime/runtime-test.cc

Index: src/runtime/runtime-test.cc
diff --git a/src/runtime/runtime-test.cc b/src/runtime/runtime-test.cc
index 36d359712e541066ca24dd8c81cece0be4121909..db173ebe8d3dd6dd4f3c1e407b3cffbbcbc9b6b7 100644
--- a/src/runtime/runtime-test.cc
+++ b/src/runtime/runtime-test.cc
@@ -622,6 +622,22 @@ RUNTIME_FUNCTION(Runtime_InNewSpace) {
   return isolate->heap()->ToBoolean(isolate->heap()->InNewSpace(obj));
 }
 
+RUNTIME_FUNCTION(Runtime_IsAsmWasmCode) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
+
+  if (!function->shared()->HasAsmWasmData()) {
+    // Doesn't have wasm data.
+    return isolate->heap()->ToBoolean(false);
+  }
+  if (function->code() !=

[Michael Starzinger, 2016/08/12 09:21:56]

Lets just test function->shared()->code() here. The shared code is always the
unoptimized code and will remain to be the instantiation stub even when we
decide to optimize the module function. This will also cover the case where
--always-opt triggers optimization of the module code.

[bradn, 2016/08/12 18:50:02]

Done.

+      isolate->builtins()->builtin(Builtins::kInstantiateAsmJs)) {
+    // Hasn't been compiled yet.
+    return isolate->heap()->ToBoolean(false);
+  }
+  return isolate->heap()->ToBoolean(true);
+}
 
 #define ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(Name)       \
   RUNTIME_FUNCTION(Runtime_Has##Name) {                  \