[stubs] Remove unused StoreGlobalViaContextStub.

src/x87/code-stubs-x87.cc

 // Copyright 2012 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_X87
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 4354 matching lines @@
     // JavaScript frame for the function.
     __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
     __ Push(Operand(edx, StandardFrameConstants::kFunctionOffset));
   } else {
     __ Push(Operand(ebp, StandardFrameConstants::kFunctionOffset));
   }
   __ PushReturnAddressFrom(ecx);
   __ TailCallRuntime(Runtime::kNewStrictArguments);
 }
 
-void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) {
-  Register context_reg = esi;
-  Register slot_reg = ebx;
-  Register value_reg = eax;
-  Register cell_reg = edi;
-  Register cell_details_reg = edx;
-  Register cell_value_reg = ecx;
-  Label fast_heapobject_case, fast_smi_case, slow_case;
-
-  if (FLAG_debug_code) {
-    __ CompareRoot(value_reg, Heap::kTheHoleValueRootIndex);
-    __ Check(not_equal, kUnexpectedValue);
-  }
-
-  // Go up context chain to the script context.
-  for (int i = 0; i < depth(); ++i) {
-    __ mov(cell_reg, ContextOperand(context_reg, Context::PREVIOUS_INDEX));
-    context_reg = cell_reg;
-  }
-
-  // Load the PropertyCell at the specified slot.
-  __ mov(cell_reg, ContextOperand(context_reg, slot_reg));
-
-  // Load PropertyDetails for the cell (actually only the cell_type and kind).
-  __ mov(cell_details_reg,
-         FieldOperand(cell_reg, PropertyCell::kDetailsOffset));
-  __ SmiUntag(cell_details_reg);
-  __ and_(cell_details_reg,
-          Immediate(PropertyDetails::PropertyCellTypeField::kMask |
-                    PropertyDetails::KindField::kMask |
-                    PropertyDetails::kAttributesReadOnlyMask));
-
-  // Check if PropertyCell holds mutable data.
-  Label not_mutable_data;
-  __ cmp(cell_details_reg,
-         Immediate(PropertyDetails::PropertyCellTypeField::encode(
-                       PropertyCellType::kMutable) |
-                   PropertyDetails::KindField::encode(kData)));
-  __ j(not_equal, &not_mutable_data);
-  __ JumpIfSmi(value_reg, &fast_smi_case);
-  __ bind(&fast_heapobject_case);
-  __ mov(FieldOperand(cell_reg, PropertyCell::kValueOffset), value_reg);
-  __ RecordWriteField(cell_reg, PropertyCell::kValueOffset, value_reg,
-                      cell_details_reg, kDontSaveFPRegs, EMIT_REMEMBERED_SET,
-                      OMIT_SMI_CHECK);
-  // RecordWriteField clobbers the value register, so we need to reload.
-  __ mov(value_reg, FieldOperand(cell_reg, PropertyCell::kValueOffset));
-  __ Ret();
-  __ bind(&not_mutable_data);
-
-  // Check if PropertyCell value matches the new value (relevant for Constant,
-  // ConstantType and Undefined cells).
-  Label not_same_value;
-  __ mov(cell_value_reg, FieldOperand(cell_reg, PropertyCell::kValueOffset));
-  __ cmp(cell_value_reg, value_reg);
-  __ j(not_equal, &not_same_value,
-       FLAG_debug_code ? Label::kFar : Label::kNear);
-  // Make sure the PropertyCell is not marked READ_ONLY.
-  __ test(cell_details_reg,
-          Immediate(PropertyDetails::kAttributesReadOnlyMask));
-  __ j(not_zero, &slow_case);
-  if (FLAG_debug_code) {
-    Label done;
-    // This can only be true for Constant, ConstantType and Undefined cells,
-    // because we never store the_hole via this stub.
-    __ cmp(cell_details_reg,
-           Immediate(PropertyDetails::PropertyCellTypeField::encode(
-                         PropertyCellType::kConstant) |
-                     PropertyDetails::KindField::encode(kData)));
-    __ j(equal, &done);
-    __ cmp(cell_details_reg,
-           Immediate(PropertyDetails::PropertyCellTypeField::encode(
-                         PropertyCellType::kConstantType) |
-                     PropertyDetails::KindField::encode(kData)));
-    __ j(equal, &done);
-    __ cmp(cell_details_reg,
-           Immediate(PropertyDetails::PropertyCellTypeField::encode(
-                         PropertyCellType::kUndefined) |
-                     PropertyDetails::KindField::encode(kData)));
-    __ Check(equal, kUnexpectedValue);
-    __ bind(&done);
-  }
-  __ Ret();
-  __ bind(&not_same_value);
-
-  // Check if PropertyCell contains data with constant type (and is not
-  // READ_ONLY).
-  __ cmp(cell_details_reg,
-         Immediate(PropertyDetails::PropertyCellTypeField::encode(
-                       PropertyCellType::kConstantType) |
-                   PropertyDetails::KindField::encode(kData)));
-  __ j(not_equal, &slow_case, Label::kNear);
-
-  // Now either both old and new values must be SMIs or both must be heap
-  // objects with same map.
-  Label value_is_heap_object;
-  __ JumpIfNotSmi(value_reg, &value_is_heap_object, Label::kNear);
-  __ JumpIfNotSmi(cell_value_reg, &slow_case, Label::kNear);
-  // Old and new values are SMIs, no need for a write barrier here.
-  __ bind(&fast_smi_case);
-  __ mov(FieldOperand(cell_reg, PropertyCell::kValueOffset), value_reg);
-  __ Ret();
-  __ bind(&value_is_heap_object);
-  __ JumpIfSmi(cell_value_reg, &slow_case, Label::kNear);
-  Register cell_value_map_reg = cell_value_reg;
-  __ mov(cell_value_map_reg,
-         FieldOperand(cell_value_reg, HeapObject::kMapOffset));
-  __ cmp(cell_value_map_reg, FieldOperand(value_reg, HeapObject::kMapOffset));
-  __ j(equal, &fast_heapobject_case);
-
-  // Fallback to the runtime.
-  __ bind(&slow_case);
-  __ SmiTag(slot_reg);
-  __ Pop(cell_reg);  // Pop return address.
-  __ Push(slot_reg);
-  __ Push(value_reg);
-  __ Push(cell_reg);  // Push return address.
-  __ TailCallRuntime(is_strict(language_mode())
-                         ? Runtime::kStoreGlobalViaContext_Strict
-                         : Runtime::kStoreGlobalViaContext_Sloppy);
-}
-
-
 // Generates an Operand for saving parameters after PrepareCallApiFunction.
 static Operand ApiParameterOperand(int index) {
   return Operand(esp, index * kPointerSize);
 }
 
 
 // Prepares stack to put arguments (aligns and so on). Reserves
 // space for return value if needed (assumes the return value is a handle).
 // Arguments must be stored in ApiParameterOperand(0), ApiParameterOperand(1)
 // etc. Saves context (esi). If space was reserved for return value then
@@ skipping 364 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87