[interpreter] Wide register support.

src/interpreter/bytecode-array-iterator.cc

Index: src/interpreter/bytecode-array-iterator.cc
diff --git a/src/interpreter/bytecode-array-iterator.cc b/src/interpreter/bytecode-array-iterator.cc
index b8f1dcdfec856bc3f033c57f109327e8bb313e9f..768980d76b088c3dfe5aee4fe8287259576c62bf 100644
--- a/src/interpreter/bytecode-array-iterator.cc
+++ b/src/interpreter/bytecode-array-iterator.cc
@@ -47,14 +47,14 @@ uint32_t BytecodeArrayIterator::GetRawOperand(int operand_index,
       bytecode_array()->GetFirstBytecodeAddress() + bytecode_offset_ +
       Bytecodes::GetOperandOffset(current_bytecode(), operand_index);
   switch (Bytecodes::SizeOfOperand(operand_type)) {
-    default:
-    case OperandSize::kNone:
-      UNREACHABLE();
     case OperandSize::kByte:
       return static_cast<uint32_t>(*operand_start);
     case OperandSize::kShort:
       return ReadUnalignedUInt16(operand_start);
+    case OperandSize::kNone:
+      UNREACHABLE();
   }
+  return 0;
 }