Refactor CallICStub to use a different stub for each customization.

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.
 
 #include "v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "bootstrapper.h"
 #include "code-stubs.h"
@@ skipping 2346 matching lines @@
 
 
 static void EmitLoadTypeFeedbackVector(MacroAssembler* masm, Register vector) {
   __ movp(vector, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
   __ movp(vector, FieldOperand(vector, JSFunction::kSharedFunctionInfoOffset));
   __ movp(vector, FieldOperand(vector,
                                SharedFunctionInfo::kFeedbackVectorOffset));
 }
 
 
-void CallICStub::Generate_MonomorphicArray(MacroAssembler* masm, Label* miss) {
+void CallIC_ArrayStub::Generate(MacroAssembler* masm) {
   // rdi - function
-  // rbx - feedback vector
   // rdx - slot id (as integer)
+  Label miss;
+  int argc = state_.arg_count();
+  ParameterCount actual(argc);
+
+  EmitLoadTypeFeedbackVector(masm, rbx);
+  __ SmiToInteger32(rdx, rdx);
+
   __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, rcx);
   __ cmpq(rdi, rcx);
-  __ j(not_equal, miss);
+  __ j(not_equal, &miss);
 
   __ movq(rax, Immediate(arg_count()));
   __ movp(rbx, FieldOperand(rbx, rdx, times_pointer_size,
                             FixedArray::kHeaderSize));
 
   // Verify that ecx contains an AllocationSite
   __ AssertUndefinedOrAllocationSite(rbx);
   ArrayConstructorStub stub(masm->isolate(), arg_count());
   __ TailCallStub(&stub);
-}
-
-
-void CallICStub::Generate_CustomFeedbackCall(MacroAssembler* masm) {
-  // rdi - function
-  // rbx - feedback vector
-  // rdx - slot id
-  Label miss;
-
-  __ SmiToInteger32(rdx, rdx);
-
-  if (state_.stub_type() == CallIC::MONOMORPHIC_ARRAY) {
-    Generate_MonomorphicArray(masm, &miss);
-  } else {
-    // So far there is only one customer for our custom feedback scheme.
-    UNREACHABLE();
-  }
 
   __ bind(&miss);
-  GenerateMiss(masm);
+  GenerateMiss(masm, IC::kCallIC_Customization_Miss);
 
   // The slow case, we need this no matter what to complete a call after a miss.
   CallFunctionNoFeedback(masm,
                          arg_count(),
                          true,
                          CallAsMethod());
 
   // Unreachable.
   __ int3();
 }
 
 
 void CallICStub::Generate(MacroAssembler* masm) {
   // rdi - function
   // rbx - vector
   // rdx - slot id
   Isolate* isolate = masm->isolate();
   Label extra_checks_or_miss, slow_start;
   Label slow, non_function, wrap, cont;
   Label have_js_function;
   int argc = state_.arg_count();
   StackArgumentsAccessor args(rsp, argc);
   ParameterCount actual(argc);
 
   EmitLoadTypeFeedbackVector(masm, rbx);
 
-  if (state_.stub_type() != CallIC::DEFAULT) {
-    Generate_CustomFeedbackCall(masm);
-    return;
-  }
-
   // The checks. First, does rdi match the recorded monomorphic target?
   __ SmiToInteger32(rdx, rdx);
   __ cmpq(rdi, FieldOperand(rbx, rdx, times_pointer_size,
                             FixedArray::kHeaderSize));
   __ j(not_equal, &extra_checks_or_miss);
 
   __ bind(&have_js_function);
   if (state_.CallAsMethod()) {
     EmitContinueIfStrictOrNative(masm, &cont);
 
@@ skipping 31 matching lines @@
   if (!FLAG_trace_ic) {
     // We are going megamorphic, and we don't want to visit the runtime.
     __ Move(FieldOperand(rbx, rdx, times_pointer_size,
                          FixedArray::kHeaderSize),
             TypeFeedbackInfo::MegamorphicSentinel(isolate));
     __ jmp(&slow_start);
   }
 
   // We are here because tracing is on or we are going monomorphic.
   __ bind(&miss);
-  GenerateMiss(masm);
+  GenerateMiss(masm, IC::kCallIC_Miss);
 
   // the slow case
   __ bind(&slow_start);
   // Check that function is not a smi.
   __ JumpIfSmi(rdi, &non_function);
   // Check that function is a JSFunction.
   __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx);
   __ j(not_equal, &slow);
   __ jmp(&have_js_function);
 
   // Unreachable
   __ int3();
 }
 
 
-void CallICStub::GenerateMiss(MacroAssembler* masm) {
+void CallICStub::GenerateMiss(MacroAssembler* masm, IC::UtilityId id) {
   // Get the receiver of the function from the stack; 1 ~ return address.
   __ movp(rcx, Operand(rsp, (state_.arg_count() + 1) * kPointerSize));
 
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
 
     // Push the receiver and the function and feedback info.
     __ Push(rcx);
     __ Push(rdi);
     __ Push(rbx);
     __ Integer32ToSmi(rdx, rdx);
     __ Push(rdx);
 
     // Call the entry.
-    ExternalReference miss = ExternalReference(IC_Utility(IC::kCallIC_Miss),
+    ExternalReference miss = ExternalReference(IC_Utility(id),
                                                masm->isolate());
     __ CallExternalReference(miss, 4);
 
     // Move result to edi and exit the internal frame.
     __ movp(rdi, rax);
   }
 }
 
 
 bool CEntryStub::NeedsImmovableCode() {
@@ skipping 2568 matching lines @@
                               return_value_operand,
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64