Calculate blocks needing a frame and frame (de)construction sites.

src/compiler/pipeline.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/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
+#include "src/base/adapters.h"
 #include "src/base/platform/elapsed-timer.h"
 #include "src/compiler/ast-graph-builder.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/compiler/basic-block-instrumentor.h"
 #include "src/compiler/change-lowering.h"
 #include "src/compiler/code-generator.h"
 #include "src/compiler/common-operator-reducer.h"
 #include "src/compiler/control-flow-optimizer.h"
 #include "src/compiler/control-reducer.h"
+#include "src/compiler/frame-elider.h"
 #include "src/compiler/graph-replay.h"
 #include "src/compiler/graph-visualizer.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/js-builtin-reducer.h"
 #include "src/compiler/js-context-specialization.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/js-inlining.h"
 #include "src/compiler/js-intrinsic-lowering.h"
 #include "src/compiler/js-type-feedback.h"
@@ skipping 796 matching lines @@
 struct OptimizeMovesPhase {
   static const char* phase_name() { return "optimize moves"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
     MoveOptimizer move_optimizer(temp_zone, data->sequence());
     move_optimizer.Run();
   }
 };
 
 
+struct FrameElisionPhase {
+  static const char* phase_name() { return "frame elision"; }
+
+  void Run(PipelineData* data, Zone* temp_zone) {
+    FrameElider(data->sequence()).Run();
+  }
+};
+
+
 struct JumpThreadingPhase {
   static const char* phase_name() { return "jump threading"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
     ZoneVector<RpoNumber> result(temp_zone);
     if (JumpThreading::ComputeForwarding(temp_zone, result, data->sequence())) {
       JumpThreading::ApplyForwarding(result, data->sequence());
     }
   }
 };
@@ skipping 332 matching lines @@
   BeginPhaseKind("register allocation");
 
   bool run_verifier = FLAG_turbo_verify_allocation;
   // Allocate registers.
   AllocateRegisters(RegisterConfiguration::ArchDefault(), run_verifier);
   if (data->compilation_failed()) {
     info()->AbortOptimization(kNotEnoughVirtualRegistersRegalloc);
     return Handle<Code>();
   }
 
+  if (FLAG_turbo_frame_elision) {
+    Run<FrameElisionPhase>();
+  }
+
   BeginPhaseKind("code generation");
 
   // Optimimize jumps.
   if (FLAG_turbo_jt) {
     Run<JumpThreadingPhase>();
   }
 
   // Generate final machine code.
   Run<GenerateCodePhase>(&linkage);
 
@@ skipping 109 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8