[turbofan] split compilation stats off from HStatistics and track high water marks

src/compiler/pipeline.h

 // 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.
 
 #ifndef V8_COMPILER_PIPELINE_H_
 #define V8_COMPILER_PIPELINE_H_
 
 #include <fstream>  // NOLINT(readability/streams)
 
 #include "src/v8.h"
 
 #include "src/compiler.h"
 
 // Note: TODO(turbofan) implies a performance improvement opportunity,
 //   and TODO(name) implies an incomplete implementation
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
 class Graph;
 class InstructionSequence;
 class Linkage;
+class PipelineStatistics;
 class RegisterAllocator;
 class Schedule;
 class SourcePositionTable;
 class ZonePool;
 
 class Pipeline {
  public:
   explicit Pipeline(CompilationInfo* info) : info_(info) {}
 
   // Run the entire pipeline and generate a handle to a code object.
@@ skipping 19 matching lines @@
 
   Schedule* ComputeSchedule(ZonePool* zone_pool, Graph* graph);
   void OpenTurboCfgFile(std::ofstream* stream);
   void PrintCompilationStart();
   void PrintScheduleAndInstructions(const char* phase, const Schedule* schedule,
                                     const SourcePositionTable* positions,
                                     const InstructionSequence* instructions);
   void PrintAllocator(const char* phase, const RegisterAllocator* allocator);
   void VerifyAndPrintGraph(Graph* graph, const char* phase,
                            bool untyped = false);
-  Handle<Code> GenerateCode(ZonePool* zone_pool, Linkage* linkage, Graph* graph,
+  Handle<Code> GenerateCode(PipelineStatistics* pipeline_statistics,
+                            ZonePool* zone_pool, Linkage* linkage, Graph* graph,
                             Schedule* schedule,
                             SourcePositionTable* source_positions);
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_PIPELINE_H_