Use a trampoline stub to load the type feedback vector for CallICs.

src/arm64/code-stubs-arm64.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 "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 2965 matching lines @@
   __ Ldr(vector, FieldMemOperand(vector,
                                  JSFunction::kSharedFunctionInfoOffset));
   __ Ldr(vector, FieldMemOperand(vector,
                                  SharedFunctionInfo::kFeedbackVectorOffset));
 }
 
 
 void CallIC_ArrayStub::Generate(MacroAssembler* masm) {
   // x1 - function
   // x3 - slot id
+  // x2 - vector
   Label miss;
   Register function = x1;
   Register feedback_vector = x2;
   Register index = x3;
   Register scratch = x4;
 
-  EmitLoadTypeFeedbackVector(masm, feedback_vector);
-
   __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, scratch);
   __ Cmp(function, scratch);
   __ B(ne, &miss);
 
   __ Mov(x0, Operand(arg_count()));
 
   __ Add(scratch, feedback_vector,
          Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Ldr(scratch, FieldMemOperand(scratch, FixedArray::kHeaderSize));
 
@@ skipping 18 matching lines @@
 
   __ Unreachable();
 }
 
 
 void CallICStub::Generate(MacroAssembler* masm) {
   ASM_LOCATION("CallICStub");
 
   // x1 - function
   // x3 - slot id (Smi)
+  // x2 - vector
   const int with_types_offset =
       FixedArray::OffsetOfElementAt(TypeFeedbackVector::kWithTypesIndex);
   const int generic_offset =
       FixedArray::OffsetOfElementAt(TypeFeedbackVector::kGenericCountIndex);
   Label extra_checks_or_miss, slow_start;
   Label slow, non_function, wrap, cont;
   Label have_js_function;
   int argc = arg_count();
   ParameterCount actual(argc);
 
   Register function = x1;
   Register feedback_vector = x2;
   Register index = x3;
   Register type = x4;
 
-  EmitLoadTypeFeedbackVector(masm, feedback_vector);
-
   // The checks. First, does x1 match the recorded monomorphic target?
   __ Add(x4, feedback_vector,
          Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Ldr(x4, FieldMemOperand(x4, FixedArray::kHeaderSize));
 
   __ Cmp(x4, function);
   __ B(ne, &extra_checks_or_miss);
 
   __ bind(&have_js_function);
   if (CallAsMethod()) {
@@ skipping 1308 matching lines @@
 }
 
 
 void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) {
   EmitLoadTypeFeedbackVector(masm, VectorLoadICDescriptor::VectorRegister());
   VectorKeyedLoadStub stub(isolate());
   __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET);
 }
 
 
+void CallICTrampolineStub::Generate(MacroAssembler* masm) {
+  EmitLoadTypeFeedbackVector(masm, x2);
+  CallICStub stub(isolate(), state());
+  __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET);
+}
+
+
+void CallIC_ArrayTrampolineStub::Generate(MacroAssembler* masm) {
+  EmitLoadTypeFeedbackVector(masm, x2);
+  CallIC_ArrayStub stub(isolate(), state());
+  __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET);
+}
+
+
 // The entry hook is a "BumpSystemStackPointer" instruction (sub), followed by
 // a "Push lr" instruction, followed by a call.
 static const unsigned int kProfileEntryHookCallSize =
     Assembler::kCallSizeWithRelocation + (2 * kInstructionSize);
 
 
 void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
   if (masm->isolate()->function_entry_hook() != NULL) {
     ProfileEntryHookStub stub(masm->isolate());
     Assembler::BlockConstPoolScope no_const_pools(masm);
@@ skipping 1004 matching lines @@
                            kStackUnwindSpace, NULL, spill_offset,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64