[type profile] Collect return types.

src/ast/ast-numbering.cc

Index: src/ast/ast-numbering.cc
diff --git a/src/ast/ast-numbering.cc b/src/ast/ast-numbering.cc
index 1730308d86af7bab45d4bb1900b3af607ee61398..25ec2dbfe1a84c0fcb10fbd85545cfbf1eb64726 100644
--- a/src/ast/ast-numbering.cc
+++ b/src/ast/ast-numbering.cc
@@ -33,6 +33,13 @@ class AstNumberingVisitor final : public AstVisitor<AstNumberingVisitor> {
 
   bool Renumber(FunctionLiteral* node);
 
+  FeedbackSlot TypeProfileSlotForReturnValue() const {
+    if (collect_type_profile_) {
+      DCHECK(!type_profile_for_return_value_.IsInvalid());
+    }
+    return type_profile_for_return_value_;
+  }
+
  private:
 // AST node visitor interface.
 #define DEFINE_VISIT(type) void Visit##type(type* node);
@@ -104,6 +111,7 @@ class AstNumberingVisitor final : public AstVisitor<AstNumberingVisitor> {
   BailoutReason dont_optimize_reason_;
   HandlerTable::CatchPrediction catch_prediction_;
   bool collect_type_profile_;
+  FeedbackSlot type_profile_for_return_value_;
 
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
   DISALLOW_COPY_AND_ASSIGN(AstNumberingVisitor);
@@ -237,6 +245,8 @@ void AstNumberingVisitor::VisitReturnStatement(ReturnStatement* node) {
   IncrementNodeCount();
   Visit(node->expression());
 
+  node->SetTypeProfileSlot(TypeProfileSlotForReturnValue());
+
   DCHECK(!node->is_async_return() ||
          properties_.flags() & AstProperties::kMustUseIgnitionTurbo);
 }
@@ -691,6 +701,11 @@ bool AstNumberingVisitor::Renumber(FunctionLiteral* node) {
 
   LanguageModeScope language_mode_scope(this, node->language_mode());
 
+  if (collect_type_profile_) {
+    type_profile_for_return_value_ =
+        properties_.get_spec()->AddTypeProfileSlot();
+  }
+
   VisitDeclarations(scope->declarations());
   VisitStatements(node->body());