Remove unused pc descriptor types.

runtime/vm/stub_code_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
@@ skipping 1744 matching lines @@
   __ LoadObject(R12, Object::null_object(), PP);
   __ pushq(R12);  // Room for result.
   __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
   __ popq(RAX);  // Address of original.
   __ popq(RBX);  // Restore IC data.
   __ LeaveStubFrame();
   __ jmp(RAX);   // Jump to original stub.
 }
 
 
-// RBX: Contains Smi 0 (need to preserve a GC-safe value for the lazy compile
-// stub).
-// R10: Contains an arguments descriptor.
-// TOS(0): return address (Dart code).
-void StubCode::GenerateClosureCallBreakpointStub(Assembler* assembler) {
-  __ EnterStubFrame();
-  // Preserve runtime args.
-  __ pushq(RBX);
-  __ pushq(R10);
-  // Room for result. Debugger stub returns address of the
-  // unpatched runtime stub.
-  __ LoadObject(R12, Object::null_object(), PP);
-  __ pushq(R12);  // Room for result.
-  __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
-  __ popq(RAX);  // Address of original.
-  __ popq(R10);  // Restore arguments.
-  __ popq(RBX);
-  __ LeaveStubFrame();
-  __ jmp(RAX);   // Jump to original stub.
-}
-
-
 //  TOS(0): return address (Dart code).
 void StubCode::GenerateRuntimeCallBreakpointStub(Assembler* assembler) {
   __ EnterStubFrame();
   // Room for result. Debugger stub returns address of the
   // unpatched runtime stub.
   __ LoadObject(R12, Object::null_object(), PP);
   __ pushq(R12);  // Room for result.
   __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0);
   __ popq(RAX);  // Address of original.
   __ LeaveStubFrame();
@@ skipping 364 matching lines @@
 // Result:
 //  RCX: entry point.
 void StubCode::GenerateMegamorphicLookupStub(Assembler* assembler) {
   EmitMegamorphicLookup(assembler, RDI, RBX, RCX);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64