MIPS: Fix unaligned read of bytecodes in interpreter.

test/cctest/interpreter/test-bytecode-generator.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/v8.h"
 
 #include "src/compiler.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 #include "src/interpreter/bytecode-generator.h"
 #include "src/interpreter/interpreter.h"
@@ skipping 162 matching lines @@
       uint32_t expected_operand;
       switch (Bytecodes::SizeOfOperand(operand_type)) {
         case OperandSize::kNone:
           UNREACHABLE();
           return;
         case OperandSize::kByte:
           expected_operand =
               static_cast<uint32_t>(expected.bytecode[operand_index]);
           break;
         case OperandSize::kShort:
-          expected_operand = Bytecodes::ShortOperandFromBytes(
-              &expected.bytecode[operand_index]);
+          expected_operand =
+              ReadUnalignedUInt16(&expected.bytecode[operand_index]);
           break;
         default:
           UNREACHABLE();
           return;
       }
       if (raw_operand != expected_operand) {
         std::ostringstream stream;
         stream << "Check failed: expected operand [" << j << "] for bytecode ["
                << bytecode_index << "] to be "
                << static_cast<unsigned int>(expected_operand) << " but got "
@@ skipping 3870 matching lines @@
   for (size_t i = 0; i < arraysize(snippets); i++) {
     Handle<BytecodeArray> bytecode_array =
         helper.MakeBytecodeForFunctionBody(snippets[i].code_snippet);
     CheckBytecodeArrayEqual(snippets[i], bytecode_array);
   }
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8