[turbofan] Fix life time and use of the Typer.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 7b74592cdca6d48188aface5e091dd48a2b963d3..84995be5970643168447e8af529c49bbe6aeadf8 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -79,7 +79,6 @@ class PipelineData {
         javascript_(nullptr),
         jsgraph_(nullptr),
         js_type_feedback_(nullptr),
-        typer_(nullptr),
         schedule_(nullptr),
         instruction_zone_scope_(zone_pool_),
         instruction_zone_(instruction_zone_scope_.zone()),
@@ -98,7 +97,6 @@ class PipelineData {
     javascript_ = new (graph_zone_) JSOperatorBuilder(graph_zone_);
     jsgraph_ = new (graph_zone_)
         JSGraph(isolate_, graph_, common_, javascript_, machine_);
-    typer_.Reset(new Typer(isolate_, graph_, info_->context()));
   }
 
   // For machine graph testing entry point.
@@ -121,7 +119,6 @@ class PipelineData {
         javascript_(nullptr),
         jsgraph_(nullptr),
         js_type_feedback_(nullptr),
-        typer_(nullptr),
         schedule_(schedule),
         instruction_zone_scope_(zone_pool_),
         instruction_zone_(instruction_zone_scope_.zone()),
@@ -150,7 +147,6 @@ class PipelineData {
         javascript_(nullptr),
         jsgraph_(nullptr),
         js_type_feedback_(nullptr),
-        typer_(nullptr),
         schedule_(nullptr),
         instruction_zone_scope_(zone_pool_),
         instruction_zone_(sequence->zone()),
@@ -194,7 +190,6 @@ class PipelineData {
   void set_js_type_feedback(JSTypeFeedbackTable* js_type_feedback) {
     js_type_feedback_ = js_type_feedback;
   }
-  Typer* typer() const { return typer_.get(); }
 
   LoopAssignmentAnalysis* loop_assignment() const { return loop_assignment_; }
   void set_loop_assignment(LoopAssignmentAnalysis* loop_assignment) {
@@ -220,7 +215,6 @@ class PipelineData {
   void DeleteGraphZone() {
     // Destroy objects with destructors first.
     source_positions_.Reset(nullptr);
-    typer_.Reset(nullptr);
     if (graph_zone_ == nullptr) return;
     // Destroy zone and clear pointers.
     graph_zone_scope_.Destroy();
@@ -291,8 +285,6 @@ class PipelineData {
   JSOperatorBuilder* javascript_;
   JSGraph* jsgraph_;
   JSTypeFeedbackTable* js_type_feedback_;
-  // TODO(dcarney): make this into a ZoneObject.
-  SmartPointer<Typer> typer_;
   Schedule* schedule_;
 
   // All objects in the following group of fields are allocated in
@@ -524,7 +516,11 @@ struct InliningPhase {
 struct TyperPhase {
   static const char* phase_name() { return "typer"; }
 
-  void Run(PipelineData* data, Zone* temp_zone) { data->typer()->Run(); }
+  void Run(PipelineData* data, Zone* temp_zone, Typer* typer) {
+    NodeVector roots(temp_zone);
+    data->jsgraph()->GetCachedNodes(&roots);
+    typer->Run(roots);
+  }
 };
 
 
@@ -1058,9 +1054,11 @@ Handle<Code> Pipeline::GenerateCode() {
   // Bailout here in case target architecture is not supported.
   if (!SupportedTarget()) return Handle<Code>::null();
 
+  SmartPointer<Typer> typer;
   if (info()->is_typing_enabled()) {
     // Type the graph.
-    Run<TyperPhase>();
+    typer.Reset(new Typer(isolate(), data.graph(), info()->context()));
+    Run<TyperPhase>(typer.get());
     RunPrintAndVerify("Typed");
   }
 
@@ -1073,7 +1071,7 @@ Handle<Code> Pipeline::GenerateCode() {
 
     if (FLAG_turbo_stress_loop_peeling) {
       Run<StressLoopPeelingPhase>();
-      RunPrintAndVerify("Loop peeled", true);
+      RunPrintAndVerify("Loop peeled");
     }
 
     if (info()->is_osr()) {
@@ -1107,7 +1105,7 @@ Handle<Code> Pipeline::GenerateCode() {
     if (info()->is_osr()) {
       Run<OsrDeconstructionPhase>();
       if (info()->bailout_reason() != kNoReason) return Handle<Code>::null();
-      RunPrintAndVerify("OSR deconstruction");
+      RunPrintAndVerify("OSR deconstruction", true);
     }
   }
 
@@ -1124,6 +1122,9 @@ Handle<Code> Pipeline::GenerateCode() {
 
   data.source_positions()->RemoveDecorator();
 
+  // Kill the Typer and thereby uninstall the decorator (if any).
+  typer.Reset(nullptr);
+
   return ScheduleAndGenerateCode(
       Linkage::ComputeIncoming(data.instruction_zone(), info()));
 }