Get rid of dynamic call debug stub

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 1831 matching lines @@
   __ 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.
 }
 
 
-//  RBX: Inline cache data array.
-//  TOS(0): return address (Dart code).
-void StubCode::GenerateBreakpointDynamicStub(Assembler* assembler) {
-  __ EnterStubFrame();
-  __ pushq(RBX);
-  __ CallRuntime(kBreakpointDynamicHandlerRuntimeEntry, 0);
-  __ popq(RBX);
-  __ LeaveStubFrame();
-
-  // Find out which dispatch stub to call.
-  Label test_two, test_three, test_four;
-  __ movq(RCX, FieldAddress(RBX, ICData::num_args_tested_offset()));
-  __ cmpq(RCX, Immediate(1));
-  __ j(NOT_EQUAL, &test_two, Assembler::kNearJump);
-  __ jmp(&StubCode::OneArgCheckInlineCacheLabel());
-  __ Bind(&test_two);
-  __ cmpl(RCX, Immediate(2));
-  __ j(NOT_EQUAL, &test_three, Assembler::kNearJump);
-  __ jmp(&StubCode::TwoArgsCheckInlineCacheLabel());
-  __ Bind(&test_three);
-  __ cmpl(RCX, Immediate(3));
-  __ j(NOT_EQUAL, &test_four, Assembler::kNearJump);
-  __ jmp(&StubCode::ThreeArgsCheckInlineCacheLabel());
-  __ Bind(&test_four);
-  __ Stop("Unsupported number of arguments tested.");
-}
-
-
 // Called only from unoptimized code.
 void StubCode::GenerateDebugStepCheckStub(Assembler* assembler) {
   // Check single stepping.
   Label not_stepping;
   __ movq(RAX, FieldAddress(CTX, Context::isolate_offset()));
   __ movzxb(RAX, Address(RAX, Isolate::single_step_offset()));
   __ cmpq(RAX, Immediate(0));
   __ j(EQUAL, &not_stepping, Assembler::kNearJump);
 
   __ EnterStubFrame();
@@ skipping 267 matching lines @@
 
   __ movq(left, Address(RSP, 2 * kWordSize));
   __ movq(right, Address(RSP, 1 * kWordSize));
   GenerateIdenticalWithNumberCheckStub(assembler, left, right);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64