[turbofan] remove dependence of InstructionBlock on BasicBlock

src/compiler/register-allocator-verifier.cc

 // Copyright 2014 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/bit-vector.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/register-allocator-verifier.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 196 matching lines @@
       CHECK(op->IsDoubleRegister() || op->IsDoubleStackSlot());
       return;
     case kSameAsFirst:
       CHECK(false);
       return;
   }
 }
 
 namespace {
 
-typedef BasicBlock::RpoNumber Rpo;
+typedef RpoNumber Rpo;
 
 static const int kInvalidVreg = InstructionOperand::kInvalidVirtualRegister;
 
 struct PhiData : public ZoneObject {
   PhiData(Rpo definition_rpo, const PhiInstruction* phi, int first_pred_vreg,
           const PhiData* first_pred_phi, Zone* zone)
       : definition_rpo(definition_rpo),
         virtual_register(phi->virtual_register()),
         first_pred_vreg(first_pred_vreg),
         first_pred_phi(first_pred_phi),
@@ skipping 432 matching lines @@
         int virtual_register = op_constraints[count].virtual_register_;
         current->Define(zone(), instr->OutputAt(i), virtual_register);
       }
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8