[wasm] Simd128 types should not be available in asmjs modules.

src/wasm/ast-decoder.cc

 // 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.
 
 #include "src/signature.h"
 
 #include "src/bit-vector.h"
 #include "src/flags.h"
 #include "src/handles.h"
 #include "src/zone/zone-containers.h"
@@ skipping 14 matching lines @@
 #if DEBUG
 #define TRACE(...)                                    \
   do {                                                \
     if (FLAG_trace_wasm_decoder) PrintF(__VA_ARGS__); \
   } while (false)
 #else
 #define TRACE(...)
 #endif
 
 #define CHECK_PROTOTYPE_OPCODE(flag)                   \
+  if (module_ && module_->origin == kAsmJsOrigin) {    \
+    error("Opcode not supported for asmjs modules");   \
+  }                                                    \
   if (!FLAG_##flag) {                                  \
     error("Invalid opcode (enable with --" #flag ")"); \
     break;                                             \
   }
 // TODO(titzer): this is only for intermediate migration.
 #define IMPLICIT_FUNCTION_END 1
 
 // An SsaEnv environment carries the current local variable renaming
 // as well as the current effect and control dependency in the TF graph.
 // It maintains a control state that tracks whether the environment
@@ skipping 448 matching lines @@
     switch (type) {
       case kAstI32:
         return builder_->Int32Constant(0);
       case kAstI64:
         return builder_->Int64Constant(0);
       case kAstF32:
         return builder_->Float32Constant(0);
       case kAstF64:
         return builder_->Float64Constant(0);
       case kAstS128:
-        return builder_->DefaultS128Value();
+        return builder_->CreateS128Value(0);
       default:
         UNREACHABLE();
         return nullptr;
     }
   }
 
   char* indentation() {
     static const int kMaxIndent = 64;
     static char bytes[kMaxIndent + 1];
     for (int i = 0; i < kMaxIndent; ++i) bytes[i] = ' ';
@@ skipping 1419 matching lines @@
 BitVector* AnalyzeLoopAssignmentForTesting(Zone* zone, size_t num_locals,
                                            const byte* start, const byte* end) {
   FunctionBody body = {nullptr, nullptr, nullptr, start, end};
   WasmFullDecoder decoder(zone, nullptr, body);
   return decoder.AnalyzeLoopAssignmentForTesting(start, num_locals);
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8