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

src/compiler/linkage.cc

 // 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.
 
 #include "src/code-stubs.h"
 #include "src/compiler.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node.h"
 #include "src/compiler/osr.h"
@@ skipping 44 matching lines @@
   switch (k) {
     case CallDescriptor::kCallCodeObject:
       os << "Code";
       break;
     case CallDescriptor::kCallJSFunction:
       os << "JS";
       break;
     case CallDescriptor::kCallAddress:
       os << "Addr";
       break;
-    case CallDescriptor::kInterpreterDispatch:
-      os << "InterpreterDispatch";
-      break;
   }
   return os;
 }
 
 
 std::ostream& operator<<(std::ostream& os, const CallDescriptor& d) {
   // TODO(svenpanne) Output properties etc. and be less cryptic.
   return os << d.kind() << ":" << d.debug_name() << ":r" << d.ReturnCount()
             << "j" << d.JSParameterCount() << "i" << d.InputCount() << "f"
             << d.FrameStateCount() << "t" << d.SupportsTailCalls();
@@ skipping 305 matching lines @@
   return new (zone) CallDescriptor(     // --
       CallDescriptor::kCallJSFunction,  // kind
       target_type,                      // target MachineType
       target_loc,                       // target location
       types.Build(),                    // machine_sig
       locations.Build(),                // location_sig
       js_parameter_count,               // stack_parameter_count
       Operator::kNoProperties,          // properties
       kNoCalleeSaved,                   // callee-saved
       kNoCalleeSaved,                   // callee-saved fp
-      flags,                            // flags
+      CallDescriptor::kCanUseRoots |    // flags
+          flags,                        // flags
       "js-call");
 }
 
 
 CallDescriptor* Linkage::GetInterpreterDispatchDescriptor(Zone* zone) {
   MachineSignature::Builder types(zone, 0, 3);
   LocationSignature::Builder locations(zone, 0, 3);
 
   // Add registers for fixed parameters passed via interpreter dispatch.
   STATIC_ASSERT(0 == Linkage::kInterpreterBytecodeOffsetParameter);
   types.AddParam(kMachIntPtr);
   locations.AddParam(regloc(kInterpreterBytecodeOffsetRegister));
 
   STATIC_ASSERT(1 == Linkage::kInterpreterBytecodeArrayParameter);
   types.AddParam(kMachAnyTagged);
   locations.AddParam(regloc(kInterpreterBytecodeArrayRegister));
 
   STATIC_ASSERT(2 == Linkage::kInterpreterDispatchTableParameter);
   types.AddParam(kMachPtr);
   locations.AddParam(regloc(kInterpreterDispatchTableRegister));
 
   LinkageLocation target_loc = LinkageLocation::ForAnyRegister();
-  return new (zone) CallDescriptor(          // --
-      CallDescriptor::kInterpreterDispatch,  // kind
-      kMachNone,                             // target MachineType
-      target_loc,                            // target location
-      types.Build(),                         // machine_sig
-      locations.Build(),                     // location_sig
-      0,                                     // stack_parameter_count
-      Operator::kNoProperties,               // properties
-      kNoCalleeSaved,                        // callee-saved registers
-      kNoCalleeSaved,                        // callee-saved fp regs
-      CallDescriptor::kSupportsTailCalls,    // flags
+  return new (zone) CallDescriptor(         // --
+      CallDescriptor::kCallCodeObject,      // kind
+      kMachNone,                            // target MachineType
+      target_loc,                           // target location
+      types.Build(),                        // machine_sig
+      locations.Build(),                    // location_sig
+      0,                                    // stack_parameter_count
+      Operator::kNoProperties,              // properties
+      kNoCalleeSaved,                       // callee-saved registers
+      kNoCalleeSaved,                       // callee-saved fp regs
+      CallDescriptor::kSupportsTailCalls |  // flags
+          CallDescriptor::kCanUseRoots,     // flags
       "interpreter-dispatch");
 }
 
 
 // TODO(all): Add support for return representations/locations to
 // CallInterfaceDescriptor.
 // TODO(turbofan): cache call descriptors for code stub calls.
 CallDescriptor* Linkage::GetStubCallDescriptor(
     Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor,
     int stack_parameter_count, CallDescriptor::Flags flags,
@@ skipping 67 matching lines @@
     return LinkageLocation::ForCalleeFrameSlot(spill_index);
   } else {
     // Parameter. Use the assigned location from the incoming call descriptor.
     int parameter_index = 1 + index;  // skip index 0, which is the target.
     return incoming_->GetInputLocation(parameter_index);
   }
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8