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// Copyright 2018 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. #include "src/torque/instructions.h" #include "src/torque/cfg.h" #include "src/torque/type-oracle.h" namespace v8 { namespace internal { namespace torque { #define TORQUE_INSTRUCTION_BOILERPLATE_DEFINITIONS(Name) \ const InstructionKind Name::kKind = InstructionKind::k##Name; \ std::unique_ptr<InstructionBase> Name::Clone() const { \ return std::unique_ptr<InstructionBase>(new Name(*this)); \ } \ void Name::Assign(const InstructionBase& other) { \ *this = static_cast<const Name&>(other); \ } TORQUE_INSTRUCTION_LIST(TORQUE_INSTRUCTION_BOILERPLATE_DEFINITIONS) #undef TORQUE_INSTRUCTION_BOILERPLATE_DEFINITIONS namespace { void ExpectType(const Type* expected, const Type* actual) { if (expected != actual) { ReportError("expected type ", *expected, " but found ", *actual); } } void ExpectSubtype(const Type* subtype, const Type* supertype) { if (!subtype->IsSubtypeOf(supertype)) { ReportError("type ", *subtype, " is not a subtype of ", *supertype); } } } // namespace void PeekInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { const Type* type = stack->Peek(slot); if (widened_type) { if (type->IsTopType()) { const TopType* top_type = TopType::cast(type); ReportError("use of " + top_type->reason()); } ExpectSubtype(type, *widened_type); type = *widened_type; } stack->Push(type); } void PokeInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { const Type* type = stack->Top(); if (widened_type) { ExpectSubtype(type, *widened_type); type = *widened_type; } stack->Poke(slot, type); stack->Pop(); } void DeleteRangeInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { stack->DeleteRange(range); } void PushUninitializedInstruction::TypeInstruction( Stack<const Type*>* stack, ControlFlowGraph* cfg) const { stack->Push(type); } void PushBuiltinPointerInstruction::TypeInstruction( Stack<const Type*>* stack, ControlFlowGraph* cfg) const { stack->Push(type); } void NamespaceConstantInstruction::TypeInstruction( Stack<const Type*>* stack, ControlFlowGraph* cfg) const { stack->PushMany(LowerType(constant->type())); } void InstructionBase::InvalidateTransientTypes( Stack<const Type*>* stack) const { auto current = stack->begin(); while (current != stack->end()) { if ((*current)->IsTransient()) { std::stringstream stream; stream << "type " << **current << " is made invalid by transitioning callable invocation at " << PositionAsString(pos); *current = TypeOracle::GetTopType(stream.str(), *current); } ++current; } } void CallIntrinsicInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { std::vector<const Type*> parameter_types = LowerParameterTypes(intrinsic->signature().parameter_types); for (intptr_t i = parameter_types.size() - 1; i >= 0; --i) { const Type* arg_type = stack->Pop(); const Type* parameter_type = parameter_types.back(); parameter_types.pop_back(); if (arg_type != parameter_type) { ReportError("parameter ", i, ": expected type ", *parameter_type, " but found type ", *arg_type); } } if (intrinsic->IsTransitioning()) { InvalidateTransientTypes(stack); } stack->PushMany(LowerType(intrinsic->signature().return_type)); } void CallCsaMacroInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { std::vector<const Type*> parameter_types = LowerParameterTypes(macro->signature().parameter_types); for (intptr_t i = parameter_types.size() - 1; i >= 0; --i) { const Type* arg_type = stack->Pop(); const Type* parameter_type = parameter_types.back(); parameter_types.pop_back(); if (arg_type != parameter_type) { ReportError("parameter ", i, ": expected type ", *parameter_type, " but found type ", *arg_type); } } if (macro->IsTransitioning()) { InvalidateTransientTypes(stack); } if (catch_block) { Stack<const Type*> catch_stack = *stack; catch_stack.Push(TypeOracle::GetJSAnyType()); (*catch_block)->SetInputTypes(catch_stack); } stack->PushMany(LowerType(macro->signature().return_type)); } void CallCsaMacroAndBranchInstruction::TypeInstruction( Stack<const Type*>* stack, ControlFlowGraph* cfg) const { std::vector<const Type*> parameter_types = LowerParameterTypes(macro->signature().parameter_types); for (intptr_t i = parameter_types.size() - 1; i >= 0; --i) { const Type* arg_type = stack->Pop(); const Type* parameter_type = parameter_types.back(); parameter_types.pop_back(); if (arg_type != parameter_type) { ReportError("parameter ", i, ": expected type ", *parameter_type, " but found type ", *arg_type); } } if (label_blocks.size() != macro->signature().labels.size()) { ReportError("wrong number of labels"); } for (size_t i = 0; i < label_blocks.size(); ++i) { Stack<const Type*> continuation_stack = *stack; continuation_stack.PushMany( LowerParameterTypes(macro->signature().labels[i].types)); label_blocks[i]->SetInputTypes(std::move(continuation_stack)); } if (macro->IsTransitioning()) { InvalidateTransientTypes(stack); } if (catch_block) { Stack<const Type*> catch_stack = *stack; catch_stack.Push(TypeOracle::GetJSAnyType()); (*catch_block)->SetInputTypes(catch_stack); } if (macro->signature().return_type != TypeOracle::GetNeverType()) { Stack<const Type*> return_stack = *stack; return_stack.PushMany(LowerType(macro->signature().return_type)); if (return_continuation == base::nullopt) { ReportError("missing return continuation."); } (*return_continuation)->SetInputTypes(return_stack); } else { if (return_continuation != base::nullopt) { ReportError("unreachable return continuation."); } } } void CallBuiltinInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { std::vector<const Type*> argument_types = stack->PopMany(argc); if (argument_types != LowerParameterTypes(builtin->signature().parameter_types)) { ReportError("wrong argument types"); } if (builtin->IsTransitioning()) { InvalidateTransientTypes(stack); } if (catch_block) { Stack<const Type*> catch_stack = *stack; catch_stack.Push(TypeOracle::GetJSAnyType()); (*catch_block)->SetInputTypes(catch_stack); } stack->PushMany(LowerType(builtin->signature().return_type)); } void CallBuiltinPointerInstruction::TypeInstruction( Stack<const Type*>* stack, ControlFlowGraph* cfg) const { std::vector<const Type*> argument_types = stack->PopMany(argc); const BuiltinPointerType* f = BuiltinPointerType::DynamicCast(stack->Pop()); if (!f) ReportError("expected function pointer type"); if (argument_types != LowerParameterTypes(f->parameter_types())) { ReportError("wrong argument types"); } // TODO(tebbi): Only invalidate transient types if the function pointer type // is transitioning. InvalidateTransientTypes(stack); stack->PushMany(LowerType(f->return_type())); } void CallRuntimeInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { std::vector<const Type*> argument_types = stack->PopMany(argc); if (argument_types != LowerParameterTypes(runtime_function->signature().parameter_types, argc)) { ReportError("wrong argument types"); } if (runtime_function->IsTransitioning()) { InvalidateTransientTypes(stack); } if (catch_block) { Stack<const Type*> catch_stack = *stack; catch_stack.Push(TypeOracle::GetJSAnyType()); (*catch_block)->SetInputTypes(catch_stack); } const Type* return_type = runtime_function->signature().return_type; if (return_type != TypeOracle::GetNeverType()) { stack->PushMany(LowerType(return_type)); } } void BranchInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { const Type* condition_type = stack->Pop(); if (condition_type != TypeOracle::GetBoolType()) { ReportError("condition has to have type bool"); } if_true->SetInputTypes(*stack); if_false->SetInputTypes(*stack); } void ConstexprBranchInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { if_true->SetInputTypes(*stack); if_false->SetInputTypes(*stack); } void GotoInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { destination->SetInputTypes(*stack); } void GotoExternalInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { if (variable_names.size() != stack->Size()) { ReportError("goto external label with wrong parameter count."); } } void ReturnInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { cfg->SetReturnType(stack->Pop()); } void PrintConstantStringInstruction::TypeInstruction( Stack<const Type*>* stack, ControlFlowGraph* cfg) const {} void AbortInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const {} void UnsafeCastInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { stack->Poke(stack->AboveTop() - 1, destination_type); } void CreateFieldReferenceInstruction::TypeInstruction( Stack<const Type*>* stack, ControlFlowGraph* cfg) const { ExpectSubtype(stack->Top(), type); stack->Push(TypeOracle::GetIntPtrType()); } void LoadReferenceInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { ExpectType(TypeOracle::GetIntPtrType(), stack->Pop()); ExpectSubtype(stack->Pop(), TypeOracle::GetHeapObjectType()); DCHECK_EQ(std::vector<const Type*>{type}, LowerType(type)); stack->Push(type); } void StoreReferenceInstruction::TypeInstruction(Stack<const Type*>* stack, ControlFlowGraph* cfg) const { ExpectSubtype(stack->Pop(), type); ExpectType(TypeOracle::GetIntPtrType(), stack->Pop()); ExpectSubtype(stack->Pop(), TypeOracle::GetHeapObjectType()); } bool CallRuntimeInstruction::IsBlockTerminator() const { return is_tailcall || runtime_function->signature().return_type == TypeOracle::GetNeverType(); } } // namespace torque } // namespace internal } // namespace v8