[ic] LoadGlobalIC caches PropertyCells in the feedback vector.

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 4805 matching lines @@
 
   // Fall back to %NewStrictArguments.
   __ bind(&too_big_for_new_space);
   __ PopReturnAddressTo(kScratchRegister);
   __ Push(rdi);
   __ PushReturnAddressFrom(kScratchRegister);
   __ TailCallRuntime(Runtime::kNewStrictArguments);
 }
 
 
-void LoadGlobalViaContextStub::Generate(MacroAssembler* masm) {
-  Register context_reg = rsi;
-  Register slot_reg = rbx;
-  Register result_reg = rax;
-  Label slow_case;
-
-  // Go up context chain to the script context.
-  for (int i = 0; i < depth(); ++i) {
-    __ movp(rdi, ContextOperand(context_reg, Context::PREVIOUS_INDEX));
-    context_reg = rdi;
-  }
-
-  // Load the PropertyCell value at the specified slot.
-  __ movp(result_reg, ContextOperand(context_reg, slot_reg));
-  __ movp(result_reg, FieldOperand(result_reg, PropertyCell::kValueOffset));
-
-  // Check that value is not the_hole.
-  __ CompareRoot(result_reg, Heap::kTheHoleValueRootIndex);
-  __ j(equal, &slow_case, Label::kNear);
-  __ Ret();
-
-  // Fallback to the runtime.
-  __ bind(&slow_case);
-  __ Integer32ToSmi(slot_reg, slot_reg);
-  __ PopReturnAddressTo(kScratchRegister);
-  __ Push(slot_reg);
-  __ Push(kScratchRegister);
-  __ TailCallRuntime(Runtime::kLoadGlobalViaContext);
-}
-
-
 void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
   Register context_reg = rsi;
   Register slot_reg = rbx;
   Register value_reg = rax;
   Register cell_reg = r8;
   Register cell_details_reg = rdx;
   Register cell_value_reg = r9;
   Label fast_heapobject_case, fast_smi_case, slow_case;
 
   if (FLAG_debug_code) {
@@ skipping 494 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64