[Interpreter] Make InterpreterAssembler a subclass of CodeStubAssembler.

src/compiler/linkage.cc

Index: src/compiler/linkage.cc
diff --git a/src/compiler/linkage.cc b/src/compiler/linkage.cc
index a3e936c0f499e49701e96d48dedd72ea4ba160ad..d6c8a51f94bbfb632f4fe9a025c2ecb3b1a3fa7b 100644
--- a/src/compiler/linkage.cc
+++ b/src/compiler/linkage.cc
@@ -366,60 +366,6 @@ CallDescriptor* Linkage::GetJSCallDescriptor(Zone* zone, bool is_osr,
       "js-call");
 }
 
-
-CallDescriptor* Linkage::GetInterpreterDispatchDescriptor(Zone* zone) {
-  MachineSignature::Builder types(zone, 0, 6);
-  LocationSignature::Builder locations(zone, 0, 6);
-
-  // Add registers for fixed parameters passed via interpreter dispatch.
-  STATIC_ASSERT(0 == Linkage::kInterpreterAccumulatorParameter);
-  types.AddParam(MachineType::AnyTagged());
-  locations.AddParam(regloc(kInterpreterAccumulatorRegister));
-
-  STATIC_ASSERT(1 == Linkage::kInterpreterRegisterFileParameter);
-  types.AddParam(MachineType::Pointer());
-  locations.AddParam(regloc(kInterpreterRegisterFileRegister));
-
-  STATIC_ASSERT(2 == Linkage::kInterpreterBytecodeOffsetParameter);
-  types.AddParam(MachineType::IntPtr());
-  locations.AddParam(regloc(kInterpreterBytecodeOffsetRegister));
-
-  STATIC_ASSERT(3 == Linkage::kInterpreterBytecodeArrayParameter);
-  types.AddParam(MachineType::AnyTagged());
-  locations.AddParam(regloc(kInterpreterBytecodeArrayRegister));
-
-  STATIC_ASSERT(4 == Linkage::kInterpreterDispatchTableParameter);
-  types.AddParam(MachineType::Pointer());
-#if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_X87)
-  // TODO(rmcilroy): Make the context param the one spilled to the stack once
-  // Turbofan supports modified stack arguments in tail calls.
-  locations.AddParam(
-      LinkageLocation::ForCallerFrameSlot(kInterpreterDispatchTableSpillSlot));
-#else
-  locations.AddParam(regloc(kInterpreterDispatchTableRegister));
-#endif
-
-  STATIC_ASSERT(5 == Linkage::kInterpreterContextParameter);
-  types.AddParam(MachineType::AnyTagged());
-  locations.AddParam(regloc(kContextRegister));
-
-  LinkageLocation target_loc = LinkageLocation::ForAnyRegister();
-  return new (zone) CallDescriptor(         // --
-      CallDescriptor::kCallCodeObject,      // kind
-      MachineType::None(),                  // 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.