Make V8 compile with Win64 dbg

src/compiler/x64/code-generator-x64.cc

 // Copyright 2013 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/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 633 matching lines @@
 
 // Assembles boolean materializations after this instruction.
 void CodeGenerator::AssembleArchBoolean(Instruction* instr,
                                         FlagsCondition condition) {
   X64OperandConverter i(this, instr);
   Label done;
 
   // Materialize a full 64-bit 1 or 0 value. The result register is always the
   // last output of the instruction.
   Label check;
-  DCHECK_NE(0, instr->OutputCount());
+  DCHECK_NE(0, static_cast<int>(instr->OutputCount()));
   Register reg = i.OutputRegister(static_cast<int>(instr->OutputCount() - 1));
   Condition cc = no_condition;
   switch (condition) {
     case kUnorderedEqual:
       __ j(parity_odd, &check, Label::kNear);
       __ movl(reg, Immediate(0));
       __ jmp(&done, Label::kNear);
     // Fall through.
     case kEqual:
       cc = equal;
@@ skipping 324 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace compiler
 }  // namespace v8