[turbofan] Prepare mechanism to enable TF on language subset.

src/ast-numbering.cc

 // Copyright 2012 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/v8.h"
 
 #include "src/ast.h"
 #include "src/ast-numbering.h"
 #include "src/scopes.h"
 
@@ skipping 34 matching lines @@
   }
 
   void IncrementNodeCount() { properties_.add_node_count(1); }
   void DisableSelfOptimization() {
     properties_.flags()->Add(kDontSelfOptimize);
   }
   void DisableOptimization(BailoutReason reason) {
     dont_optimize_reason_ = reason;
     DisableSelfOptimization();
   }
+  void DisableCrankshaft(BailoutReason reason) {
+    if (FLAG_turbo_shipping) {
+      return properties_.flags()->Add(kDontCrankshaft);
+    }
+    dont_optimize_reason_ = reason;
+    DisableSelfOptimization();
+  }
   void DisableCaching(BailoutReason reason) {
     dont_optimize_reason_ = reason;
     DisableSelfOptimization();
     properties_.flags()->Add(kDontCache);
   }
 
   template <typename Node>
   void ReserveFeedbackSlots(Node* node) {
     FeedbackVectorRequirements reqs =
         node->ComputeFeedbackRequirements(isolate(), &ic_slot_cache_);
@@ skipping 76 matching lines @@
 
 void AstNumberingVisitor::VisitRegExpLiteral(RegExpLiteral* node) {
   IncrementNodeCount();
   node->set_base_id(ReserveIdRange(RegExpLiteral::num_ids()));
 }
 
 
 void AstNumberingVisitor::VisitVariableProxy(VariableProxy* node) {
   IncrementNodeCount();
   if (node->var()->IsLookupSlot()) {
-    DisableOptimization(kReferenceToAVariableWhichRequiresDynamicLookup);
+    DisableCrankshaft(kReferenceToAVariableWhichRequiresDynamicLookup);
   }
   ReserveFeedbackSlots(node);
   node->set_base_id(ReserveIdRange(VariableProxy::num_ids()));
 }
 
 
 void AstNumberingVisitor::VisitThisFunction(ThisFunction* node) {
   IncrementNodeCount();
   node->set_base_id(ReserveIdRange(ThisFunction::num_ids()));
 }
@@ skipping 80 matching lines @@
     // Don't try to optimize JS runtime calls because we bailout on them.
     DisableOptimization(kCallToAJavaScriptRuntimeFunction);
   }
   node->set_base_id(ReserveIdRange(CallRuntime::num_ids()));
   VisitArguments(node->arguments());
 }
 
 
 void AstNumberingVisitor::VisitWithStatement(WithStatement* node) {
   IncrementNodeCount();
-  DisableOptimization(kWithStatement);
+  DisableCrankshaft(kWithStatement);
   node->set_base_id(ReserveIdRange(WithStatement::num_ids()));
   Visit(node->expression());
   Visit(node->statement());
 }
 
 
 void AstNumberingVisitor::VisitDoWhileStatement(DoWhileStatement* node) {
   IncrementNodeCount();
   DisableSelfOptimization();
   node->set_base_id(ReserveIdRange(DoWhileStatement::num_ids()));
@@ skipping 74 matching lines @@
   ReserveFeedbackSlots(node);
   node->set_base_id(ReserveIdRange(ForInStatement::num_ids()));
   Visit(node->each());
   Visit(node->enumerable());
   Visit(node->body());
 }
 
 
 void AstNumberingVisitor::VisitForOfStatement(ForOfStatement* node) {
   IncrementNodeCount();
-  DisableOptimization(kForOfStatement);
+  DisableCrankshaft(kForOfStatement);
   node->set_base_id(ReserveIdRange(ForOfStatement::num_ids()));
   Visit(node->assign_iterator());
   Visit(node->next_result());
   Visit(node->result_done());
   Visit(node->assign_each());
   Visit(node->body());
 }
 
 
 void AstNumberingVisitor::VisitConditional(Conditional* node) {
@@ skipping 146 matching lines @@
 bool AstNumberingVisitor::Renumber(FunctionLiteral* node) {
   Scope* scope = node->scope();
 
   if (scope->HasIllegalRedeclaration()) {
     scope->VisitIllegalRedeclaration(this);
     DisableOptimization(kFunctionWithIllegalRedeclaration);
     return Finish(node);
   }
   if (scope->calls_eval()) DisableOptimization(kFunctionCallsEval);
   if (scope->arguments() != NULL && !scope->arguments()->IsStackAllocated()) {
-    DisableOptimization(kContextAllocatedArguments);
+    DisableCrankshaft(kContextAllocatedArguments);
   }
 
   VisitDeclarations(scope->declarations());
   if (scope->is_function_scope() && scope->function() != NULL) {
     // Visit the name of the named function expression.
     Visit(scope->function());
   }
   VisitStatements(node->body());
 
   return Finish(node);
 }
 
 
 bool AstNumbering::Renumber(Isolate* isolate, Zone* zone,
                             FunctionLiteral* function) {
   AstNumberingVisitor visitor(isolate, zone);
   return visitor.Renumber(function);
 }
 }
 }  // namespace v8::internal