[turbofan] Turn slow case for stack check into deferred code.

src/compiler/control-builders.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_CONTROL_BUILDERS_H_
 #define V8_COMPILER_CONTROL_BUILDERS_H_
 
 #include "src/v8.h"
 
 #include "src/compiler/graph-builder.h"
 #include "src/compiler/node.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
-
 // Base class for all control builders. Also provides a common interface for
 // control builders to handle 'break' and 'continue' statements when they are
 // used to model breakable statements.
 class ControlBuilder {
  public:
   explicit ControlBuilder(StructuredGraphBuilder* builder)
       : builder_(builder) {}
   virtual ~ControlBuilder() {}
 
   // Interface for break and continue.
@@ skipping 14 matching lines @@
 
 // Tracks control flow for a conditional statement.
 class IfBuilder : public ControlBuilder {
  public:
   explicit IfBuilder(StructuredGraphBuilder* builder)
       : ControlBuilder(builder),
         then_environment_(NULL),
         else_environment_(NULL) {}
 
   // Primitive control commands.
-  void If(Node* condition);
+  void If(Node* condition, BranchHint hint = BranchHint::kNone);
   void Then();
   void Else();
   void End();
 
  private:
   Environment* then_environment_;  // Environment after the 'then' body.
   Environment* else_environment_;  // Environment for the 'else' body.
 };
 
 
@@ skipping 72 matching lines @@
   virtual void Break();
 
  private:
   Environment* break_environment_;  // Environment after the block exits.
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_CONTROL_BUILDERS_H_