[turbofan] Remove kInterpreterDispatch CallDescriptor kind in favor of flag.

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/compiler/frame.h"
 #include "src/compiler/machine-type.h"
@@ skipping 94 matching lines @@
 
 // Describes a call to various parts of the compiler. Every call has the notion
 // of a "target", which is the first input to the call.
 class CallDescriptor final : public ZoneObject {
  public:
   // Describes the kind of this call, which determines the target.
   enum Kind {
     kCallCodeObject,      // target is a Code object
     kCallJSFunction,      // target is a JSFunction object
     kCallAddress,         // target is a machine pointer
-    kInterpreterDispatch  // target is an interpreter bytecode handler
   };
 
   enum Flag {
     kNoFlags = 0u,
     kNeedsFrameState = 1u << 0,
     kPatchableCallSite = 1u << 1,
     kNeedsNopAfterCall = 1u << 2,
     kHasExceptionHandler = 1u << 3,
     kHasLocalCatchHandler = 1u << 4,
     kSupportsTailCalls = 1u << 5,
+    kCanUseRoots = 1u << 6,
     kPatchableCallSiteWithNop = kPatchableCallSite | kNeedsNopAfterCall
   };
   typedef base::Flags<Flag> Flags;
 
   CallDescriptor(Kind kind, MachineType target_type, LinkageLocation target_loc,
                  const MachineSignature* machine_sig,
                  LocationSignature* location_sig, size_t stack_param_count,
                  Operator::Properties properties,
                  RegList callee_saved_registers,
                  RegList callee_saved_fp_registers, Flags flags,
@@ skipping 15 matching lines @@
 
   // Returns the kind of this call.
   Kind kind() const { return kind_; }
 
   // Returns {true} if this descriptor is a call to a C function.
   bool IsCFunctionCall() const { return kind_ == kCallAddress; }
 
   // Returns {true} if this descriptor is a call to a JSFunction.
   bool IsJSFunctionCall() const { return kind_ == kCallJSFunction; }
 
-  bool IsInterpreterDispatch() const { return kind_ == kInterpreterDispatch; }
-
   // The number of return values from this call.
   size_t ReturnCount() const { return machine_sig_->return_count(); }
 
   // The number of C parameters to this call.
   size_t CParameterCount() const { return machine_sig_->parameter_count(); }
 
   // The number of stack parameters to the call.
   size_t StackParameterCount() const { return stack_param_count_; }
 
   // The number of parameters to the JS function call.
@@ skipping 167 matching lines @@
   CallDescriptor* const incoming_;
 
   DISALLOW_COPY_AND_ASSIGN(Linkage);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LINKAGE_H_