[turbofan] basic block profiler

src/compiler/schedule.h

 // 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.
 
 #ifndef V8_COMPILER_SCHEDULE_H_
 #define V8_COMPILER_SCHEDULE_H_
 
 #include <vector>
 
 #include "src/v8.h"
 
 #include "src/compiler/generic-algorithm.h"
 #include "src/compiler/generic-graph.h"
 #include "src/compiler/generic-node.h"
 #include "src/compiler/generic-node-inl.h"
 #include "src/compiler/node.h"
 #include "src/compiler/opcodes.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 class BasicBlock;
+class BasicBlockInstrumentor;
 class Graph;
 class ConstructScheduleData;
 class CodeGenerator;  // Because of a namespace bug in clang.
 
 class BasicBlockData {
  public:
   // Possible control nodes that can end a block.
   enum Control {
     kNone,    // Control not initialized yet.
     kGoto,    // Goto a single successor block.
@@ skipping 237 matching lines @@
   friend class CodeGenerator;
 
   void AddSuccessor(BasicBlock* block, BasicBlock* succ) {
     succ->AppendInput(zone_, block);
   }
 
   BasicBlockVector* rpo_order() { return &rpo_order_; }
 
  private:
   friend class ScheduleVisualizer;
+  friend class BasicBlockInstrumentor;
 
   void SetControlInput(BasicBlock* block, Node* node) {
     block->control_input_ = node;
     SetBlockForNode(block, node);
   }
 
   void SetBlockForNode(BasicBlock* block, Node* node) {
     int length = static_cast<int>(nodeid_to_block_.size());
     if (node->id() >= length) {
       nodeid_to_block_.resize(node->id() + 1);
     }
     nodeid_to_block_[node->id()] = block;
   }
 
   Zone* zone_;
   BasicBlockVector all_blocks_;           // All basic blocks in the schedule.
   BasicBlockVector nodeid_to_block_;      // Map from node to containing block.
   BasicBlockVector rpo_order_;            // Reverse-post-order block list.
 };
 
 OStream& operator<<(OStream& os, const Schedule& s);
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_SCHEDULE_H_