X87: Remove PropertyCell space

port 16c8485a (r27269).

original commit message:

  Replaces StoreGlobalCell / LoadGlobalCell with NamedField variants that use write barriers.

BUG=

Review URL: https://codereview.chromium.org/1013543004

Cr-Commit-Position: refs/heads/master@{#27395}

src/x87/lithium-codegen-x87.cc

@@ -3139,16 +3139,6 @@ void LCodeGen::DoReturn(LReturn* instr) {
 }
 
 
-void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) {
-  Register result = ToRegister(instr->result());
-  __ mov(result, Operand::ForCell(instr->hydrogen()->cell().handle()));
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    __ cmp(result, factory()->the_hole_value());
-    DeoptimizeIf(equal, instr, Deoptimizer::kHole);
-  }
-}
-
-
 template <class T>
 void LCodeGen::EmitVectorLoadICRegisters(T* instr) {
   DCHECK(FLAG_vector_ics);
@@ -3184,25 +3174,6 @@ void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) {
 }
 
 
-void LCodeGen::DoStoreGlobalCell(LStoreGlobalCell* instr) {
-  Register value = ToRegister(instr->value());
-  Handle<PropertyCell> cell_handle = instr->hydrogen()->cell().handle();
-
-  // If the cell we are storing to contains the hole it could have
-  // been deleted from the property dictionary. In that case, we need
-  // to update the property details in the property dictionary to mark
-  // it as no longer deleted. We deoptimize in that case.
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    __ cmp(Operand::ForCell(cell_handle), factory()->the_hole_value());
-    DeoptimizeIf(equal, instr, Deoptimizer::kHole);
-  }
-
-  // Store the value.
-  __ mov(Operand::ForCell(cell_handle), value);
-  // Cells are always rescanned, so no write barrier here.
-}
-
-
 void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) {
   Register context = ToRegister(instr->context());
   Register result = ToRegister(instr->result());

src/x87/lithium-x87.cc

@@ -2130,14 +2130,6 @@ LInstruction* LChunkBuilder::DoConstant(HConstant* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoLoadGlobalCell(HLoadGlobalCell* instr) {
-  LLoadGlobalCell* result = new(zone()) LLoadGlobalCell;
-  return instr->RequiresHoleCheck()
-      ? AssignEnvironment(DefineAsRegister(result))
-      : DefineAsRegister(result);
-}
-
-
 LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) {
   LOperand* context = UseFixed(instr->context(), esi);
   LOperand* global_object =
@@ -2153,13 +2145,6 @@ LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoStoreGlobalCell(HStoreGlobalCell* instr) {
-  LStoreGlobalCell* result =
-      new(zone()) LStoreGlobalCell(UseRegister(instr->value()));
-  return instr->RequiresHoleCheck() ? AssignEnvironment(result) : result;
-}
-
-
 LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
   LOperand* context = UseRegisterAtStart(instr->value());
   LInstruction* result =

src/x87/lithium-x87.h

@@ -104,7 +104,6 @@ class LCodeGen;
   V(LoadContextSlot)                         \
   V(LoadFieldByIndex)                        \
   V(LoadFunctionPrototype)                   \
-  V(LoadGlobalCell)                          \
   V(LoadGlobalGeneric)                       \
   V(LoadKeyed)                               \
   V(LoadKeyedGeneric)                        \
@@ -145,7 +144,6 @@ class LCodeGen;
   V(StoreCodeEntry)                          \
   V(StoreContextSlot)                        \
   V(StoreFrameContext)                       \
-  V(StoreGlobalCell)                         \
   V(StoreKeyed)                              \
   V(StoreKeyedGeneric)                       \
   V(StoreNamedField)                         \
@@ -1726,13 +1724,6 @@ class LLoadKeyedGeneric FINAL : public LTemplateInstruction<1, 3, 1> {
 };
 
 
-class LLoadGlobalCell FINAL : public LTemplateInstruction<1, 0, 0> {
- public:
-  DECLARE_CONCRETE_INSTRUCTION(LoadGlobalCell, "load-global-cell")
-  DECLARE_HYDROGEN_ACCESSOR(LoadGlobalCell)
-};
-
-
 class LLoadGlobalGeneric FINAL : public LTemplateInstruction<1, 2, 1> {
  public:
   LLoadGlobalGeneric(LOperand* context, LOperand* global_object,
@@ -1754,19 +1745,6 @@ class LLoadGlobalGeneric FINAL : public LTemplateInstruction<1, 2, 1> {
 };
 
 
-class LStoreGlobalCell FINAL : public LTemplateInstruction<0, 1, 0> {
- public:
-  explicit LStoreGlobalCell(LOperand* value) {
-    inputs_[0] = value;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(StoreGlobalCell, "store-global-cell")
-  DECLARE_HYDROGEN_ACCESSOR(StoreGlobalCell)
-};
-
-
 class LLoadContextSlot FINAL : public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LLoadContextSlot(LOperand* context) {