Generate StoreGlobal stubs with Hydrogen

src/hydrogen-instructions.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2135 matching lines @@
 
 
 HConstant::HConstant(Handle<Object> handle, Representation r)
   : handle_(handle),
     unique_id_(),
     has_smi_value_(false),
     has_int32_value_(false),
     has_double_value_(false),
     is_internalized_string_(false),
     is_not_in_new_space_(true),
+    is_cell_(false),
     boolean_value_(handle->BooleanValue()) {
   if (handle_->IsHeapObject()) {
     Heap* heap = Handle<HeapObject>::cast(handle)->GetHeap();
     is_not_in_new_space_ = !heap->InNewSpace(*handle);
   }
   if (handle_->IsNumber()) {
     double n = handle_->Number();
     has_int32_value_ = IsInteger32(n);
     int32_value_ = DoubleToInt32(n);
     has_smi_value_ = has_int32_value_ && Smi::IsValid(int32_value_);
     double_value_ = n;
     has_double_value_ = true;
   } else {
     type_from_value_ = HType::TypeFromValue(handle_);
     is_internalized_string_ = handle_->IsInternalizedString();
   }
+
+  is_cell_ = !handle_.is_null() &&
+      (handle_->IsCell() || handle_->IsPropertyCell());
   Initialize(r);
 }
 
 
 HConstant::HConstant(Handle<Object> handle,
                      UniqueValueId unique_id,
                      Representation r,
                      HType type,
                      bool is_internalize_string,
                      bool is_not_in_new_space,
                      bool boolean_value)
     : handle_(handle),
       unique_id_(unique_id),
       has_smi_value_(false),
       has_int32_value_(false),
       has_double_value_(false),
       is_internalized_string_(is_internalize_string),
       is_not_in_new_space_(is_not_in_new_space),
+      is_cell_(false),
       boolean_value_(boolean_value),
       type_from_value_(type) {
   ASSERT(!handle.is_null());
   ASSERT(!type.IsUninitialized());
   ASSERT(!type.IsTaggedNumber());
   Initialize(r);
 }
 
 
 HConstant::HConstant(int32_t integer_value,
                      Representation r,
                      bool is_not_in_new_space,
                      Handle<Object> optional_handle)
     : handle_(optional_handle),
       unique_id_(),
       has_int32_value_(true),
       has_double_value_(true),
       is_internalized_string_(false),
       is_not_in_new_space_(is_not_in_new_space),
+      is_cell_(false),
       boolean_value_(integer_value != 0),
       int32_value_(integer_value),
       double_value_(FastI2D(integer_value)) {
   has_smi_value_ = Smi::IsValid(int32_value_);
   Initialize(r);
 }
 
 
 HConstant::HConstant(double double_value,
                      Representation r,
                      bool is_not_in_new_space,
                      Handle<Object> optional_handle)
     : handle_(optional_handle),
       unique_id_(),
       has_int32_value_(IsInteger32(double_value)),
       has_double_value_(true),
       is_internalized_string_(false),
       is_not_in_new_space_(is_not_in_new_space),
+      is_cell_(false),
       boolean_value_(double_value != 0 && !std::isnan(double_value)),
       int32_value_(DoubleToInt32(double_value)),
       double_value_(double_value) {
   has_smi_value_ = has_int32_value_ && Smi::IsValid(int32_value_);
   Initialize(r);
 }
 
 
 void HConstant::Initialize(Representation r) {
   if (r.IsNone()) {
     if (has_smi_value_) {
       r = Representation::Smi();
     } else if (has_int32_value_) {
       r = Representation::Integer32();
     } else if (has_double_value_) {
       r = Representation::Double();
     } else {
       r = Representation::Tagged();
     }
   }
   set_representation(r);
   SetFlag(kUseGVN);
   if (representation().IsInteger32()) {
     ClearGVNFlag(kDependsOnOsrEntries);
   }
 }
 
 
+bool HConstant::EmitAtUses() {
+  ASSERT(IsLinked());
+  if (block()->graph()->has_osr_loop_entry()) return true;
+  if (representation().IsDouble()) return false;
+  if (representation().IsTagged() && UseCount() > 1) {
+    return false;
+  }
+  return true;
+}
+
+
 HConstant* HConstant::CopyToRepresentation(Representation r, Zone* zone) const {
   if (r.IsSmi() && !has_smi_value_) return NULL;
   if (r.IsInteger32() && !has_int32_value_) return NULL;
   if (r.IsDouble() && !has_double_value_) return NULL;
   if (has_int32_value_) {
     return new(zone) HConstant(int32_value_, r, is_not_in_new_space_, handle_);
   }
   if (has_double_value_) {
     return new(zone) HConstant(double_value_, r, is_not_in_new_space_, handle_);
   }
@@ skipping 1532 matching lines @@
     int offset = (index * kPointerSize) + map->instance_size();
     return HObjectAccess(kInobject, offset);
   } else {
     // Non-negative property indices are in the properties array.
     int offset = (index * kPointerSize) + FixedArray::kHeaderSize;
     return HObjectAccess(kBackingStore, offset, name);
   }
 }
 
 
+HObjectAccess HObjectAccess::ForCellPayload(Isolate* isolate) {
+  return HObjectAccess(
+      kInobject, Cell::kValueOffset,
+      Handle<String>(isolate->heap()->cell_value_string()));
+}
+
+
 void HObjectAccess::SetGVNFlags(HValue *instr, bool is_store) {
   // set the appropriate GVN flags for a given load or store instruction
   if (is_store) {
     // track dominating allocations in order to eliminate write barriers
     instr->SetGVNFlag(kDependsOnNewSpacePromotion);
     instr->SetFlag(HValue::kTrackSideEffectDominators);
   } else {
     // try to GVN loads, but don't hoist above map changes
     instr->SetFlag(HValue::kUseGVN);
     instr->SetGVNFlag(kDependsOnMaps);
@@ skipping 49 matching lines @@
     case kBackingStore:
       if (!name_.is_null()) stream->Add(*String::cast(*name_)->ToCString());
       stream->Add("[backing-store]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal