Revert of [turbofan] Run everything after representation selection concurrently.

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"
@@ skipping 1284 matching lines @@
   // Remove dead->live edges from the graph.
   Run<EarlyGraphTrimmingPhase>();
   RunPrintAndVerify("Early trimmed", true);
 
   if (FLAG_print_turbo_replay) {
     // Print a replay of the initial graph.
     GraphReplayPrinter::PrintReplay(data->graph());
   }
 
   // Type the graph.
-  Typer typer(isolate(), data->graph(), info()->is_deoptimization_enabled()
-                                            ? Typer::kDeoptimizationEnabled
-                                            : Typer::kNoFlags,
-              info()->dependencies());
-  Run<TyperPhase>(&typer);
+  base::SmartPointer<Typer> typer;
+  typer.Reset(new Typer(isolate(), data->graph(),
+                        info()->is_deoptimization_enabled()
+                            ? Typer::kDeoptimizationEnabled
+                            : Typer::kNoFlags,
+                        info()->dependencies()));
+  Run<TyperPhase>(typer.get());
   RunPrintAndVerify("Typed");
 
   BeginPhaseKind("lowering");
 
   // Lower JSOperators where we can determine types.
   Run<TypedLoweringPhase>();
   RunPrintAndVerify("Lowered typed");
 
   if (FLAG_turbo_stress_loop_peeling) {
     Run<StressLoopPeelingPhase>();
     RunPrintAndVerify("Loop peeled");
   }
 
   if (FLAG_experimental_turbo_escape) {
     Run<EscapeAnalysisPhase>();
     RunPrintAndVerify("Escape Analysed");
   }
 
   // Select representations.
   Run<RepresentationSelectionPhase>();
   RunPrintAndVerify("Representations selected");
 
   // Run early optimization pass.
   Run<EarlyOptimizationPhase>();
   RunPrintAndVerify("Early optimized");
 
+  Run<EffectControlLinearizationPhase>();
+  RunPrintAndVerify("Effect and control linearized");
+
+  Run<BranchEliminationPhase>();
+  RunPrintAndVerify("Branch conditions eliminated");
+
+  // Optimize control flow.
+  if (FLAG_turbo_cf_optimization) {
+    Run<ControlFlowOptimizationPhase>();
+    RunPrintAndVerify("Control flow optimized");
+  }
+
+  // Lower changes that have been inserted before.
+  Run<LateOptimizationPhase>();
+  // TODO(jarin, rossberg): Remove UNTYPED once machine typing works.
+  RunPrintAndVerify("Late optimized", true);
+
+  // Kill the Typer and thereby uninstall the decorator (if any).
+  typer.Reset(nullptr);
+
   EndPhaseKind();
 
   return true;
 }
 
 bool Pipeline::OptimizeGraph(Linkage* linkage) {
   PipelineData* data = this->data_;
 
   BeginPhaseKind("block building");
 
-  Run<EffectControlLinearizationPhase>();
-  RunPrintAndVerify("Effect and control linearized", true);
-
-  Run<BranchEliminationPhase>();
-  RunPrintAndVerify("Branch conditions eliminated", true);
-
-  // Optimize control flow.
-  if (FLAG_turbo_cf_optimization) {
-    Run<ControlFlowOptimizationPhase>();
-    RunPrintAndVerify("Control flow optimized", true);
-  }
-
-  // Lower changes that have been inserted before.
-  Run<LateOptimizationPhase>();
-  // TODO(jarin, rossberg): Remove UNTYPED once machine typing works.
-  RunPrintAndVerify("Late optimized", true);
-
   Run<LateGraphTrimmingPhase>();
   // TODO(jarin, rossberg): Remove UNTYPED once machine typing works.
   RunPrintAndVerify("Late trimmed", true);
 
   data->source_positions()->RemoveDecorator();
 
   return ScheduleAndSelectInstructions(linkage);
 }
 
 Handle<Code> Pipeline::GenerateCode() {
@@ skipping 320 matching lines @@
   data->DeleteRegisterAllocationZone();
 }
 
 CompilationInfo* Pipeline::info() const { return data_->info(); }
 
 Isolate* Pipeline::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8