[turbofan] Enable concurrent (re)compilation.

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_
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
 // Do not include anything from src/compiler here!
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 class CompilationInfo;
 class OptimizedCompileJob;
 class RegisterConfiguration;
-class Zone;
 
 namespace compiler {
 
 class CallDescriptor;
 class Graph;
 class InstructionSequence;
 class Linkage;
 class PipelineData;
 class Schedule;
 class SourcePositionTable;
-class ZonePool;
 
 class Pipeline {
  public:
-  explicit Pipeline(CompilationInfo* info) : info_(info), data_(nullptr) {}
+  explicit Pipeline(PipelineData* data) : data_(data) {}
+
+  // Run the graph creation and initial optimization passes.
+  bool CreateGraph();
+
+  // Run the concurrent optimization passes.
+  bool OptimizeGraph(Linkage* linkage);
+
+  // Perform the actual code generation and return handle to a code object.
+  Handle<Code> GenerateCode(Linkage* linkage);
 
   // Run the entire pipeline and generate a handle to a code object.
   Handle<Code> GenerateCode();
 
   // Run the pipeline on a machine graph and generate code. The {schedule} must
   // be valid, hence the given {graph} does not need to be schedulable.
   static Handle<Code> GenerateCodeForCodeStub(Isolate* isolate,
                                               CallDescriptor* call_descriptor,
                                               Graph* graph, Schedule* schedule,
                                               Code::Flags flags,
                                               const char* debug_name);
 
+  // Run the entire pipeline and generate a handle to a code object suitable for
+  // testing.
+  static Handle<Code> GenerateCodeForTesting(CompilationInfo* info);
+
   // Run the pipeline on a machine graph and generate code. If {schedule} is
   // {nullptr}, then compute a new schedule for code generation.
   static Handle<Code> GenerateCodeForTesting(CompilationInfo* info,
                                              Graph* graph,
                                              Schedule* schedule = nullptr);
 
   // Run just the register allocator phases.
   static bool AllocateRegistersForTesting(const RegisterConfiguration* config,
                                           InstructionSequence* sequence,
                                           bool run_verifier);
 
   // Run the pipeline on a machine graph and generate code. If {schedule} is
   // {nullptr}, then compute a new schedule for code generation.
   static Handle<Code> GenerateCodeForTesting(CompilationInfo* info,
                                              CallDescriptor* call_descriptor,
                                              Graph* graph,
                                              Schedule* schedule = nullptr);
 
   // Returns a new compilation job for the given compilation info.
   static OptimizedCompileJob* NewCompilationJob(CompilationInfo* info);
 
-  void InitializeWasmCompilation(Zone* pipeline_zone, ZonePool* zone_pool,
-                                 Graph* graph,
-                                 SourcePositionTable* source_positions);
-  bool ExecuteWasmCompilation(CallDescriptor* descriptor);
-  Handle<Code> FinalizeWasmCompilation(CallDescriptor* descriptor);
+  // Returns a new compilation job for the WebAssembly compilation info.
+  static OptimizedCompileJob* NewWasmCompilationJob(
+      CompilationInfo* info, Graph* graph, CallDescriptor* descriptor,
+      SourcePositionTable* source_positions);
+
+  // TODO(mstarzinger, bmeurer): This shouldn't be public!
+  bool ScheduleAndSelectInstructions(Linkage* linkage);
 
  private:
   // Helpers for executing pipeline phases.
   template <typename Phase>
   void Run();
   template <typename Phase, typename Arg0>
   void Run(Arg0 arg_0);
   template <typename Phase, typename Arg0, typename Arg1>
   void Run(Arg0 arg_0, Arg1 arg_1);
 
   void BeginPhaseKind(const char* phase_kind);
+  void EndPhaseKind();
   void RunPrintAndVerify(const char* phase, bool untyped = false);
+  Handle<Code> ScheduleAndGenerateCode(CallDescriptor* call_descriptor);
   void AllocateRegisters(const RegisterConfiguration* config,
                          CallDescriptor* descriptor, bool run_verifier);
-  bool ScheduleGraph(CallDescriptor* call_descriptor);
-  Handle<Code> GenerateCode(CallDescriptor* descriptor);
-  Handle<Code> ScheduleAndGenerateCode(CallDescriptor* call_descriptor);
-  CompilationInfo* info() const { return info_; }
+
+  CompilationInfo* info() const;
   Isolate* isolate() const;
 
-  CompilationInfo* const info_;
-  PipelineData* data_;
+  PipelineData* const data_;
 
   DISALLOW_COPY_AND_ASSIGN(Pipeline);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_PIPELINE_H_