[turbofan] remove dependence of InstructionBlock on BasicBlock

src/compiler/ppc/code-generator-ppc.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/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/ppc/macro-assembler-ppc.h"
@@ skipping 998 matching lines @@
     } else if (cond == gt) {
       __ bunordered(tlabel, cr);
       // Unnecessary for ne/ge since only FU bit will be set.
     }
   }
   __ b(cond, tlabel, cr);
   if (!branch->fallthru) __ b(flabel);  // no fallthru to flabel.
 }
 
 
-void CodeGenerator::AssembleArchJump(BasicBlock::RpoNumber target) {
+void CodeGenerator::AssembleArchJump(RpoNumber target) {
   if (!IsNextInAssemblyOrder(target)) __ b(GetLabel(target));
 }
 
 
 // Assembles boolean materializations after an instruction.
 void CodeGenerator::AssembleArchBoolean(Instruction* instr,
                                         FlagsCondition condition) {
   PPCOperandConverter i(this, instr);
   Label done;
   ArchOpcode op = instr->arch_opcode();
@@ skipping 368 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8