Fix signed-compare error with gcc 4.9.2.

src/interpreter/bytecode-array-builder.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/interpreter/bytecode-array-builder.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
@@ skipping 765 matching lines @@
     UNIMPLEMENTED();
   }
   return *this;
 }
 
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::New(Register constructor,
                                                 Register first_arg,
                                                 size_t arg_count) {
   if (!first_arg.is_valid()) {
-    DCHECK_EQ(0, arg_count);
+    DCHECK_EQ(0u, arg_count);
     first_arg = Register(0);
   }
   DCHECK(FitsInIdx8Operand(arg_count));
   Output(Bytecode::kNew, constructor.ToOperand(), first_arg.ToOperand(),
          static_cast<uint8_t>(arg_count));
   return *this;
 }
 
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::CallRuntime(
     Runtime::FunctionId function_id, Register first_arg, size_t arg_count) {
   DCHECK(FitsInIdx16Operand(function_id));
   DCHECK(FitsInIdx8Operand(arg_count));
   if (!first_arg.is_valid()) {
-    DCHECK_EQ(0, arg_count);
+    DCHECK_EQ(0u, arg_count);
     first_arg = Register(0);
   }
   Output(Bytecode::kCallRuntime, static_cast<uint16_t>(function_id),
          first_arg.ToOperand(), static_cast<uint8_t>(arg_count));
   return *this;
 }
 
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::CallJSRuntime(int context_index,
                                                           Register receiver,
@@ skipping 470 matching lines @@
   DCHECK_GT(next_consecutive_count_, 0);
   builder_->BorrowConsecutiveTemporaryRegister(next_consecutive_register_);
   allocated_.push_back(next_consecutive_register_);
   next_consecutive_count_--;
   return Register(next_consecutive_register_++);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8