Lazy deoptimization for comparisons in Turbofan.

src/compiler/linkage.h

 // 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.
 
 #ifndef V8_COMPILER_LINKAGE_H_
 #define V8_COMPILER_LINKAGE_H_
 
 #include "src/base/flags.h"
 #include "src/code-stubs.h"
 #include "src/compiler/frame.h"
@@ skipping 129 matching lines @@
  public:
   explicit Linkage(CompilationInfo* info);
   explicit Linkage(CompilationInfo* info, CallDescriptor* incoming)
       : info_(info), incoming_(incoming) {}
 
   // The call descriptor for this compilation unit describes the locations
   // of incoming parameters and the outgoing return value(s).
   CallDescriptor* GetIncomingDescriptor() { return incoming_; }
   CallDescriptor* GetJSCallDescriptor(int parameter_count);
   static CallDescriptor* GetJSCallDescriptor(int parameter_count, Zone* zone);
-  CallDescriptor* GetRuntimeCallDescriptor(
-      Runtime::FunctionId function, int parameter_count,
-      Operator::Property properties,
-      CallDescriptor::Flags flags = CallDescriptor::kNoFlags);
+  CallDescriptor* GetRuntimeCallDescriptor(Runtime::FunctionId function,
+                                           int parameter_count,
+                                           Operator::Property properties);
   static CallDescriptor* GetRuntimeCallDescriptor(Runtime::FunctionId function,
                                                   int parameter_count,
                                                   Operator::Property properties,
-                                                  CallDescriptor::Flags flags,
                                                   Zone* zone);
 
   CallDescriptor* GetStubCallDescriptor(
       CodeStubInterfaceDescriptor* descriptor, int stack_parameter_count = 0,
       CallDescriptor::Flags flags = CallDescriptor::kNoFlags);
   static CallDescriptor* GetStubCallDescriptor(
       CodeStubInterfaceDescriptor* descriptor, int stack_parameter_count,
       CallDescriptor::Flags flags, Zone* zone);
 
   // Creates a call descriptor for simplified C calls that is appropriate
@@ skipping 16 matching lines @@
 
   // Get the frame offset for a given spill slot. The location depends on the
   // calling convention and the specific frame layout, and may thus be
   // architecture-specific. Negative spill slots indicate arguments on the
   // caller's frame. The {extra} parameter indicates an additional offset from
   // the frame offset, e.g. to index into part of a double slot.
   FrameOffset GetFrameOffset(int spill_slot, Frame* frame, int extra = 0);
 
   CompilationInfo* info() const { return info_; }
 
+  static bool NeedsFrameState(Runtime::FunctionId function);
+
  private:
   CompilationInfo* info_;
   CallDescriptor* incoming_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LINKAGE_H_