MIPS: Remove PropertyCell space.

Port 16c8485a

Original commit message:
Replaces StoreGlobalCell / LoadGlobalCell with NamedField variants that use write barriers.

BUG=

Review URL: https://codereview.chromium.org/1014293002

Cr-Commit-Position: refs/heads/master@{#27277}

src/mips/lithium-codegen-mips.cc

@@ -2902,17 +2902,6 @@ void LCodeGen::DoReturn(LReturn* instr) {
 }
 
 
-void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) {
-  Register result = ToRegister(instr->result());
-  __ li(at, Operand(Handle<Object>(instr->hydrogen()->cell().handle())));
-  __ lw(result, FieldMemOperand(at, Cell::kValueOffset));
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
-    DeoptimizeIf(eq, instr, Deoptimizer::kHole, result, Operand(at));
-  }
-}
-
-
 template <class T>
 void LCodeGen::EmitVectorLoadICRegisters(T* instr) {
   DCHECK(FLAG_vector_ics);
@@ -2948,32 +2937,6 @@ void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) {
 }
 
 
-void LCodeGen::DoStoreGlobalCell(LStoreGlobalCell* instr) {
-  Register value = ToRegister(instr->value());
-  Register cell = scratch0();
-
-  // Load the cell.
-  __ li(cell, Operand(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.
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    // We use a temp to check the payload.
-    Register payload = ToRegister(instr->temp());
-    __ lw(payload, FieldMemOperand(cell, Cell::kValueOffset));
-    __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
-    DeoptimizeIf(eq, instr, Deoptimizer::kHole, payload, Operand(at));
-  }
-
-  // Store the value.
-  __ sw(value, FieldMemOperand(cell, Cell::kValueOffset));
-  // 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/mips/lithium-mips.cc

@@ -2087,14 +2087,6 @@ 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(), cp);
   LOperand* global_object =
@@ -2109,16 +2101,6 @@ LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoStoreGlobalCell(HStoreGlobalCell* instr) {
-  LOperand* value = UseRegister(instr->value());
-  // Use a temp to check the value in the cell in the case where we perform
-  // a hole check.
-  return instr->RequiresHoleCheck()
-      ? AssignEnvironment(new(zone()) LStoreGlobalCell(value, TempRegister()))
-      : new(zone()) LStoreGlobalCell(value, NULL);
-}
-
-
 LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
   LOperand* context = UseRegisterAtStart(instr->value());
   LInstruction* result =

src/mips/lithium-mips.h

@@ -100,7 +100,6 @@ class LCodeGen;
   V(LoadRoot)                                \
   V(LoadFieldByIndex)                        \
   V(LoadFunctionPrototype)                   \
-  V(LoadGlobalCell)                          \
   V(LoadGlobalGeneric)                       \
   V(LoadKeyed)                               \
   V(LoadKeyedGeneric)                        \
@@ -141,7 +140,6 @@ class LCodeGen;
   V(StoreCodeEntry)                          \
   V(StoreContextSlot)                        \
   V(StoreFrameContext)                       \
-  V(StoreGlobalCell)                         \
   V(StoreKeyed)                              \
   V(StoreKeyedGeneric)                       \
   V(StoreNamedField)                         \
@@ -1667,13 +1665,6 @@ 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,
@@ -1695,21 +1686,6 @@ class LLoadGlobalGeneric FINAL : public LTemplateInstruction<1, 2, 1> {
 };
 
 
-class LStoreGlobalCell FINAL : public LTemplateInstruction<0, 1, 1> {
- public:
-  LStoreGlobalCell(LOperand* value, LOperand* temp) {
-    inputs_[0] = value;
-    temps_[0] = temp;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-  LOperand* temp() { return temps_[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) {

src/mips64/lithium-codegen-mips64.cc

@@ -2879,17 +2879,6 @@ void LCodeGen::DoReturn(LReturn* instr) {
 }
 
 
-void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) {
-  Register result = ToRegister(instr->result());
-  __ li(at, Operand(Handle<Object>(instr->hydrogen()->cell().handle())));
-  __ ld(result, FieldMemOperand(at, Cell::kValueOffset));
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
-    DeoptimizeIf(eq, instr, Deoptimizer::kHole, result, Operand(at));
-  }
-}
-
-
 template <class T>
 void LCodeGen::EmitVectorLoadICRegisters(T* instr) {
   DCHECK(FLAG_vector_ics);
@@ -2925,31 +2914,6 @@ void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) {
 }
 
 
-void LCodeGen::DoStoreGlobalCell(LStoreGlobalCell* instr) {
-  Register value = ToRegister(instr->value());
-  Register cell = scratch0();
-
-  // Load the cell.
-  __ li(cell, Operand(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.
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    // We use a temp to check the payload.
-    Register payload = ToRegister(instr->temp());
-    __ ld(payload, FieldMemOperand(cell, Cell::kValueOffset));
-    __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
-    DeoptimizeIf(eq, instr, Deoptimizer::kHole, payload, Operand(at));
-  }
-
-  // Store the value.
-  __ sd(value, FieldMemOperand(cell, Cell::kValueOffset));
-  // 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/mips64/lithium-mips64.cc

@@ -2085,14 +2085,6 @@ 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(), cp);
   LOperand* global_object =
@@ -2107,16 +2099,6 @@ LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoStoreGlobalCell(HStoreGlobalCell* instr) {
-  LOperand* value = UseRegister(instr->value());
-  // Use a temp to check the value in the cell in the case where we perform
-  // a hole check.
-  return instr->RequiresHoleCheck()
-      ? AssignEnvironment(new(zone()) LStoreGlobalCell(value, TempRegister()))
-      : new(zone()) LStoreGlobalCell(value, NULL);
-}
-
-
 LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
   LOperand* context = UseRegisterAtStart(instr->value());
   LInstruction* result =

src/mips64/lithium-mips64.h

@@ -100,7 +100,6 @@ class LCodeGen;
   V(LoadRoot)                                \
   V(LoadFieldByIndex)                        \
   V(LoadFunctionPrototype)                   \
-  V(LoadGlobalCell)                          \
   V(LoadGlobalGeneric)                       \
   V(LoadKeyed)                               \
   V(LoadKeyedGeneric)                        \
@@ -140,7 +139,6 @@ class LCodeGen;
   V(StoreCodeEntry)                          \
   V(StoreContextSlot)                        \
   V(StoreFrameContext)                       \
-  V(StoreGlobalCell)                         \
   V(StoreKeyed)                              \
   V(StoreKeyedGeneric)                       \
   V(StoreNamedField)                         \
@@ -1665,13 +1663,6 @@ 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,
@@ -1693,21 +1684,6 @@ class LLoadGlobalGeneric FINAL : public LTemplateInstruction<1, 2, 1> {
 };
 
 
-class LStoreGlobalCell FINAL : public LTemplateInstruction<0, 1, 1> {
- public:
-  LStoreGlobalCell(LOperand* value, LOperand* temp) {
-    inputs_[0] = value;
-    temps_[0] = temp;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-  LOperand* temp() { return temps_[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) {