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

src/runtime/runtime-compiler.cc

Index: src/runtime/runtime-compiler.cc
diff --git a/src/runtime/runtime-compiler.cc b/src/runtime/runtime-compiler.cc
index 862fefcd5045ad3fbc7a5dcd85c2b032be34387a..5fb28c61ff4a0c50473e8a7af064a987d47cfa01 100644
--- a/src/runtime/runtime-compiler.cc
+++ b/src/runtime/runtime-compiler.cc
@@ -101,8 +101,9 @@ RUNTIME_FUNCTION(Runtime_InstantiateAsmJs) {
       return *result.ToHandleChecked();
     }
   }
-  // Remove wasm data and return a smi 0 to indicate failure.
-  function->shared()->ClearAsmWasmData();
+  // Return a smi 0 to indicate failure.
+  // AsmWasmData will get removed later as a consequence (but is kept so we

[Michael Starzinger, 2016/08/11 11:44:10]

See comments in compiler.cc about this.

[bradn, 2016/08/12 01:17:09]

Done.

+  // know we've tried this and failed).
   return Smi::FromInt(0);
 }