[stubs] Drop LoadICStub and LoadICTrampolineStub (the non-TurboFan implementations of LoadIC dispatc

src/x64/code-stubs-x64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 2937 matching lines @@
   __ movp(rbx, MemOperand(rbp, parameter_count_offset));
   masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE);
   __ PopReturnAddressTo(rcx);
   int additional_offset =
       function_mode() == JS_FUNCTION_STUB_MODE ? kPointerSize : 0;
   __ leap(rsp, MemOperand(rsp, rbx, times_pointer_size, additional_offset));
   __ jmp(rcx);  // Return to IC Miss stub, continuation still on stack.
 }
 
 
-void LoadICTrampolineStub::Generate(MacroAssembler* masm) {
-  __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister());
-  LoadICStub stub(isolate());
-  stub.GenerateForTrampoline(masm);
-}
-
-
 void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) {
   __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister());
   KeyedLoadICStub stub(isolate());
   stub.GenerateForTrampoline(masm);
 }
 
 
 static void HandleArrayCases(MacroAssembler* masm, Register feedback,
                              Register receiver_map, Register scratch1,
                              Register scratch2, Register scratch3,
@@ skipping 59 matching lines @@
   __ cmpp(receiver_map, FieldOperand(feedback, WeakCell::kValueOffset));
   __ j(not_equal, try_array);
   Register handler = feedback;
   __ movp(handler, FieldOperand(vector, integer_slot, times_pointer_size,
                                 FixedArray::kHeaderSize + kPointerSize));
   __ leap(handler, FieldOperand(handler, Code::kHeaderSize));
   __ jmp(handler);
 }
 
 
-void LoadICStub::Generate(MacroAssembler* masm) { GenerateImpl(masm, false); }
-
-
-void LoadICStub::GenerateForTrampoline(MacroAssembler* masm) {
-  GenerateImpl(masm, true);
-}
-
-
-void LoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) {
-  Register receiver = LoadWithVectorDescriptor::ReceiverRegister();  // rdx
-  Register name = LoadWithVectorDescriptor::NameRegister();          // rcx
-  Register vector = LoadWithVectorDescriptor::VectorRegister();      // rbx
-  Register slot = LoadWithVectorDescriptor::SlotRegister();          // rax
-  Register feedback = rdi;
-  Register integer_slot = r8;
-  Register receiver_map = r9;
-
-  __ SmiToInteger32(integer_slot, slot);
-  __ movp(feedback, FieldOperand(vector, integer_slot, times_pointer_size,
-                                 FixedArray::kHeaderSize));
-
-  // Try to quickly handle the monomorphic case without knowing for sure
-  // if we have a weak cell in feedback. We do know it's safe to look
-  // at WeakCell::kValueOffset.
-  Label try_array, load_smi_map, compare_map;
-  Label not_array, miss;
-  HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector,
-                        integer_slot, &compare_map, &load_smi_map, &try_array);
-
-  // Is it a fixed array?
-  __ bind(&try_array);
-  __ CompareRoot(FieldOperand(feedback, 0), Heap::kFixedArrayMapRootIndex);
-  __ j(not_equal, &not_array);
-  HandleArrayCases(masm, feedback, receiver_map, integer_slot, r11, r15, true,
-                   &miss);
-
-  __ bind(&not_array);
-  __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex);
-  __ j(not_equal, &miss);
-  masm->isolate()->load_stub_cache()->GenerateProbe(masm, receiver, name,
-                                                    feedback, no_reg);
-
-  __ bind(&miss);
-  LoadIC::GenerateMiss(masm);
-
-  __ bind(&load_smi_map);
-  __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex);
-  __ jmp(&compare_map);
-}
-
-
 void KeyedLoadICStub::Generate(MacroAssembler* masm) {
   GenerateImpl(masm, false);
 }
 
 
 void KeyedLoadICStub::GenerateForTrampoline(MacroAssembler* masm) {
   GenerateImpl(masm, true);
 }
 
 
@@ skipping 1790 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64