| // Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "vm/compiler/compiler_state.h" |
| |
| #ifndef DART_PRECOMPILED_RUNTIME |
| |
| #include <functional> |
| |
| #include "vm/scopes.h" |
| |
| namespace dart { |
| |
| template <typename T> |
| T* PutIfAbsent(Thread* thread, |
| ZoneGrowableArray<T*>** array_slot, |
| intptr_t index, |
| std::function<T*()> create) { |
| auto array = *array_slot; |
| |
| if (array == nullptr) { |
| Zone* const Z = thread->zone(); |
| *array_slot = array = new (Z) ZoneGrowableArray<T*>(Z, index + 1); |
| } |
| |
| while (array->length() <= index) { |
| array->Add(nullptr); |
| } |
| |
| if (array->At(index) == nullptr) { |
| (*array)[index] = create(); |
| } |
| return array->At(index); |
| } |
| |
| LocalVariable* CompilerState::GetDummyCapturedVariable(intptr_t context_id, |
| intptr_t index) { |
| return PutIfAbsent<LocalVariable>( |
| thread(), &dummy_captured_vars_, index, [&]() { |
| Zone* const Z = thread()->zone(); |
| const AbstractType& dynamic_type = |
| AbstractType::ZoneHandle(Z, Type::DynamicType()); |
| const String& name = String::ZoneHandle( |
| Z, Symbols::NewFormatted(thread(), ":context_var%" Pd, index)); |
| LocalVariable* var = new (Z) |
| LocalVariable(TokenPosition::kNoSource, TokenPosition::kNoSource, |
| name, dynamic_type, /*param_type=*/nullptr); |
| var->set_is_captured(); |
| var->set_index(VariableIndex(index)); |
| return var; |
| }); |
| } |
| |
| const GrowableArray<LocalVariable*>& CompilerState::GetDummyContextVariables( |
| intptr_t context_id, |
| intptr_t num_context_variables) { |
| return PutIfAbsent<LocalScope>( |
| thread(), &dummy_scopes_, num_context_variables, |
| [&]() { |
| Zone* const Z = thread()->zone(); |
| |
| LocalScope* scope = new (Z) LocalScope( |
| /*parent=*/NULL, /*function_level=*/0, /*loop_level=*/0); |
| scope->set_context_level(0); |
| |
| for (intptr_t i = 0; i < num_context_variables; i++) { |
| LocalVariable* var = GetDummyCapturedVariable(context_id, i); |
| scope->AddVariable(var); |
| scope->AddContextVariable(var); |
| } |
| |
| return scope; |
| }) |
| ->context_variables(); |
| } |
| |
| } // namespace dart |
| |
| #endif // DART_PRECOMPILED_RUNTIME |