| // Copyright 2013 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 |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "typing.h" |
| |
| #include "frames.h" |
| #include "frames-inl.h" |
| #include "parser.h" // for CompileTimeValue; TODO(rossberg): should move |
| #include "scopes.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| AstTyper::AstTyper(CompilationInfo* info) |
| : info_(info), |
| oracle_( |
| Handle<Code>(info->closure()->shared()->code()), |
| Handle<Context>(info->closure()->context()->native_context()), |
| info->isolate(), |
| info->zone()), |
| store_(info->zone()) { |
| InitializeAstVisitor(info->isolate()); |
| } |
| |
| |
| #define RECURSE(call) \ |
| do { \ |
| ASSERT(!visitor->HasStackOverflow()); \ |
| call; \ |
| if (visitor->HasStackOverflow()) return; \ |
| } while (false) |
| |
| void AstTyper::Run(CompilationInfo* info) { |
| AstTyper* visitor = new(info->zone()) AstTyper(info); |
| Scope* scope = info->scope(); |
| |
| // Handle implicit declaration of the function name in named function |
| // expressions before other declarations. |
| if (scope->is_function_scope() && scope->function() != NULL) { |
| RECURSE(visitor->VisitVariableDeclaration(scope->function())); |
| } |
| RECURSE(visitor->VisitDeclarations(scope->declarations())); |
| RECURSE(visitor->VisitStatements(info->function()->body())); |
| } |
| |
| #undef RECURSE |
| |
| |
| #ifdef OBJECT_PRINT |
| static void PrintObserved(Variable* var, Object* value, Handle<Type> type) { |
| PrintF(" observed %s ", var->IsParameter() ? "param" : "local"); |
| var->name()->Print(); |
| PrintF(" : "); |
| value->ShortPrint(); |
| PrintF(" -> "); |
| type->TypePrint(); |
| } |
| #endif // OBJECT_PRINT |
| |
| |
| Effect AstTyper::ObservedOnStack(Object* value) { |
| Handle<Type> lower = Type::OfCurrently(handle(value, isolate()), isolate()); |
| return Effect(Bounds(lower, Type::Any(isolate()))); |
| } |
| |
| |
| void AstTyper::ObserveTypesAtOsrEntry(IterationStatement* stmt) { |
| if (stmt->OsrEntryId() != info_->osr_ast_id()) return; |
| |
| DisallowHeapAllocation no_gc; |
| JavaScriptFrameIterator it(isolate()); |
| JavaScriptFrame* frame = it.frame(); |
| Scope* scope = info_->scope(); |
| |
| // Assert that the frame on the stack belongs to the function we want to OSR. |
| ASSERT_EQ(*info_->closure(), frame->function()); |
| |
| int params = scope->num_parameters(); |
| int locals = scope->StackLocalCount(); |
| |
| // Use sequential composition to achieve desired narrowing. |
| // The receiver is a parameter with index -1. |
| store_.Seq(parameter_index(-1), ObservedOnStack(frame->receiver())); |
| for (int i = 0; i < params; i++) { |
| store_.Seq(parameter_index(i), ObservedOnStack(frame->GetParameter(i))); |
| } |
| |
| for (int i = 0; i < locals; i++) { |
| store_.Seq(stack_local_index(i), ObservedOnStack(frame->GetExpression(i))); |
| } |
| |
| #ifdef OBJECT_PRINT |
| if (FLAG_trace_osr && FLAG_print_scopes) { |
| PrintObserved(scope->receiver(), |
| frame->receiver(), |
| store_.LookupBounds(parameter_index(-1)).lower); |
| |
| for (int i = 0; i < params; i++) { |
| PrintObserved(scope->parameter(i), |
| frame->GetParameter(i), |
| store_.LookupBounds(parameter_index(i)).lower); |
| } |
| |
| ZoneList<Variable*> local_vars(locals, zone()); |
| ZoneList<Variable*> context_vars(scope->ContextLocalCount(), zone()); |
| scope->CollectStackAndContextLocals(&local_vars, &context_vars); |
| for (int i = 0; i < locals; i++) { |
| PrintObserved(local_vars.at(i), |
| frame->GetExpression(i), |
| store_.LookupBounds(stack_local_index(i)).lower); |
| } |
| } |
| #endif // OBJECT_PRINT |
| } |
| |
| |
| #define RECURSE(call) \ |
| do { \ |
| ASSERT(!HasStackOverflow()); \ |
| call; \ |
| if (HasStackOverflow()) return; \ |
| } while (false) |
| |
| |
| void AstTyper::VisitStatements(ZoneList<Statement*>* stmts) { |
| for (int i = 0; i < stmts->length(); ++i) { |
| Statement* stmt = stmts->at(i); |
| RECURSE(Visit(stmt)); |
| if (stmt->IsJump()) break; |
| } |
| } |
| |
| |
| void AstTyper::VisitBlock(Block* stmt) { |
| RECURSE(VisitStatements(stmt->statements())); |
| if (stmt->labels() != NULL) { |
| store_.Forget(); // Control may transfer here via 'break l'. |
| } |
| } |
| |
| |
| void AstTyper::VisitExpressionStatement(ExpressionStatement* stmt) { |
| RECURSE(Visit(stmt->expression())); |
| } |
| |
| |
| void AstTyper::VisitEmptyStatement(EmptyStatement* stmt) { |
| } |
| |
| |
| void AstTyper::VisitIfStatement(IfStatement* stmt) { |
| // Collect type feedback. |
| if (!stmt->condition()->ToBooleanIsTrue() && |
| !stmt->condition()->ToBooleanIsFalse()) { |
| stmt->condition()->RecordToBooleanTypeFeedback(oracle()); |
| } |
| |
| RECURSE(Visit(stmt->condition())); |
| Effects then_effects = EnterEffects(); |
| RECURSE(Visit(stmt->then_statement())); |
| ExitEffects(); |
| Effects else_effects = EnterEffects(); |
| RECURSE(Visit(stmt->else_statement())); |
| ExitEffects(); |
| then_effects.Alt(else_effects); |
| store_.Seq(then_effects); |
| } |
| |
| |
| void AstTyper::VisitContinueStatement(ContinueStatement* stmt) { |
| // TODO(rossberg): is it worth having a non-termination effect? |
| } |
| |
| |
| void AstTyper::VisitBreakStatement(BreakStatement* stmt) { |
| // TODO(rossberg): is it worth having a non-termination effect? |
| } |
| |
| |
| void AstTyper::VisitReturnStatement(ReturnStatement* stmt) { |
| // Collect type feedback. |
| // TODO(rossberg): we only need this for inlining into test contexts... |
| stmt->expression()->RecordToBooleanTypeFeedback(oracle()); |
| |
| RECURSE(Visit(stmt->expression())); |
| // TODO(rossberg): is it worth having a non-termination effect? |
| } |
| |
| |
| void AstTyper::VisitWithStatement(WithStatement* stmt) { |
| RECURSE(stmt->expression()); |
| RECURSE(stmt->statement()); |
| } |
| |
| |
| void AstTyper::VisitSwitchStatement(SwitchStatement* stmt) { |
| RECURSE(Visit(stmt->tag())); |
| |
| ZoneList<CaseClause*>* clauses = stmt->cases(); |
| Effects local_effects(zone()); |
| bool complex_effects = false; // True for label effects or fall-through. |
| |
| for (int i = 0; i < clauses->length(); ++i) { |
| CaseClause* clause = clauses->at(i); |
| |
| Effects clause_effects = EnterEffects(); |
| |
| if (!clause->is_default()) { |
| Expression* label = clause->label(); |
| // Collect type feedback. |
| Handle<Type> tag_type, label_type, combined_type; |
| oracle()->CompareType(clause->CompareId(), |
| &tag_type, &label_type, &combined_type); |
| NarrowLowerType(stmt->tag(), tag_type); |
| NarrowLowerType(label, label_type); |
| clause->set_compare_type(combined_type); |
| |
| RECURSE(Visit(label)); |
| if (!clause_effects.IsEmpty()) complex_effects = true; |
| } |
| |
| ZoneList<Statement*>* stmts = clause->statements(); |
| RECURSE(VisitStatements(stmts)); |
| ExitEffects(); |
| if (stmts->is_empty() || stmts->last()->IsJump()) { |
| local_effects.Alt(clause_effects); |
| } else { |
| complex_effects = true; |
| } |
| } |
| |
| if (complex_effects) { |
| store_.Forget(); // Reached this in unknown state. |
| } else { |
| store_.Seq(local_effects); |
| } |
| } |
| |
| |
| void AstTyper::VisitCaseClause(CaseClause* clause) { |
| UNREACHABLE(); |
| } |
| |
| |
| void AstTyper::VisitDoWhileStatement(DoWhileStatement* stmt) { |
| // Collect type feedback. |
| if (!stmt->cond()->ToBooleanIsTrue()) { |
| stmt->cond()->RecordToBooleanTypeFeedback(oracle()); |
| } |
| |
| // TODO(rossberg): refine the unconditional Forget (here and elsewhere) by |
| // computing the set of variables assigned in only some of the origins of the |
| // control transfer (such as the loop body here). |
| store_.Forget(); // Control may transfer here via looping or 'continue'. |
| ObserveTypesAtOsrEntry(stmt); |
| RECURSE(Visit(stmt->body())); |
| RECURSE(Visit(stmt->cond())); |
| store_.Forget(); // Control may transfer here via 'break'. |
| } |
| |
| |
| void AstTyper::VisitWhileStatement(WhileStatement* stmt) { |
| // Collect type feedback. |
| if (!stmt->cond()->ToBooleanIsTrue()) { |
| stmt->cond()->RecordToBooleanTypeFeedback(oracle()); |
| } |
| |
| store_.Forget(); // Control may transfer here via looping or 'continue'. |
| RECURSE(Visit(stmt->cond())); |
| ObserveTypesAtOsrEntry(stmt); |
| RECURSE(Visit(stmt->body())); |
| store_.Forget(); // Control may transfer here via termination or 'break'. |
| } |
| |
| |
| void AstTyper::VisitForStatement(ForStatement* stmt) { |
| if (stmt->init() != NULL) { |
| RECURSE(Visit(stmt->init())); |
| } |
| store_.Forget(); // Control may transfer here via looping. |
| if (stmt->cond() != NULL) { |
| // Collect type feedback. |
| stmt->cond()->RecordToBooleanTypeFeedback(oracle()); |
| |
| RECURSE(Visit(stmt->cond())); |
| } |
| ObserveTypesAtOsrEntry(stmt); |
| RECURSE(Visit(stmt->body())); |
| if (stmt->next() != NULL) { |
| store_.Forget(); // Control may transfer here via 'continue'. |
| RECURSE(Visit(stmt->next())); |
| } |
| store_.Forget(); // Control may transfer here via termination or 'break'. |
| } |
| |
| |
| void AstTyper::VisitForInStatement(ForInStatement* stmt) { |
| // Collect type feedback. |
| stmt->set_for_in_type(static_cast<ForInStatement::ForInType>( |
| oracle()->ForInType(stmt->ForInFeedbackId()))); |
| |
| RECURSE(Visit(stmt->enumerable())); |
| store_.Forget(); // Control may transfer here via looping or 'continue'. |
| ObserveTypesAtOsrEntry(stmt); |
| RECURSE(Visit(stmt->body())); |
| store_.Forget(); // Control may transfer here via 'break'. |
| } |
| |
| |
| void AstTyper::VisitForOfStatement(ForOfStatement* stmt) { |
| RECURSE(Visit(stmt->iterable())); |
| store_.Forget(); // Control may transfer here via looping or 'continue'. |
| RECURSE(Visit(stmt->body())); |
| store_.Forget(); // Control may transfer here via 'break'. |
| } |
| |
| |
| void AstTyper::VisitTryCatchStatement(TryCatchStatement* stmt) { |
| Effects try_effects = EnterEffects(); |
| RECURSE(Visit(stmt->try_block())); |
| ExitEffects(); |
| Effects catch_effects = EnterEffects(); |
| store_.Forget(); // Control may transfer here via 'throw'. |
| RECURSE(Visit(stmt->catch_block())); |
| ExitEffects(); |
| try_effects.Alt(catch_effects); |
| store_.Seq(try_effects); |
| // At this point, only variables that were reassigned in the catch block are |
| // still remembered. |
| } |
| |
| |
| void AstTyper::VisitTryFinallyStatement(TryFinallyStatement* stmt) { |
| RECURSE(Visit(stmt->try_block())); |
| store_.Forget(); // Control may transfer here via 'throw'. |
| RECURSE(Visit(stmt->finally_block())); |
| } |
| |
| |
| void AstTyper::VisitDebuggerStatement(DebuggerStatement* stmt) { |
| store_.Forget(); // May do whatever. |
| } |
| |
| |
| void AstTyper::VisitFunctionLiteral(FunctionLiteral* expr) { |
| expr->InitializeSharedInfo(Handle<Code>(info_->closure()->shared()->code())); |
| } |
| |
| |
| void AstTyper::VisitNativeFunctionLiteral(NativeFunctionLiteral* expr) { |
| } |
| |
| |
| void AstTyper::VisitConditional(Conditional* expr) { |
| // Collect type feedback. |
| expr->condition()->RecordToBooleanTypeFeedback(oracle()); |
| |
| RECURSE(Visit(expr->condition())); |
| Effects then_effects = EnterEffects(); |
| RECURSE(Visit(expr->then_expression())); |
| ExitEffects(); |
| Effects else_effects = EnterEffects(); |
| RECURSE(Visit(expr->else_expression())); |
| ExitEffects(); |
| then_effects.Alt(else_effects); |
| store_.Seq(then_effects); |
| |
| NarrowType(expr, Bounds::Either( |
| expr->then_expression()->bounds(), |
| expr->else_expression()->bounds(), isolate_)); |
| } |
| |
| |
| void AstTyper::VisitVariableProxy(VariableProxy* expr) { |
| Variable* var = expr->var(); |
| if (var->IsStackAllocated()) { |
| NarrowType(expr, store_.LookupBounds(variable_index(var))); |
| } |
| } |
| |
| |
| void AstTyper::VisitLiteral(Literal* expr) { |
| Handle<Type> type = Type::Constant(expr->value(), isolate_); |
| NarrowType(expr, Bounds(type)); |
| } |
| |
| |
| void AstTyper::VisitRegExpLiteral(RegExpLiteral* expr) { |
| NarrowType(expr, Bounds(Type::RegExp(isolate_))); |
| } |
| |
| |
| void AstTyper::VisitObjectLiteral(ObjectLiteral* expr) { |
| ZoneList<ObjectLiteral::Property*>* properties = expr->properties(); |
| for (int i = 0; i < properties->length(); ++i) { |
| ObjectLiteral::Property* prop = properties->at(i); |
| |
| // Collect type feedback. |
| if ((prop->kind() == ObjectLiteral::Property::MATERIALIZED_LITERAL && |
| !CompileTimeValue::IsCompileTimeValue(prop->value())) || |
| prop->kind() == ObjectLiteral::Property::COMPUTED) { |
| if (prop->key()->value()->IsInternalizedString() && prop->emit_store()) { |
| prop->RecordTypeFeedback(oracle()); |
| } |
| } |
| |
| RECURSE(Visit(prop->value())); |
| } |
| |
| NarrowType(expr, Bounds(Type::Object(isolate_))); |
| } |
| |
| |
| void AstTyper::VisitArrayLiteral(ArrayLiteral* expr) { |
| ZoneList<Expression*>* values = expr->values(); |
| for (int i = 0; i < values->length(); ++i) { |
| Expression* value = values->at(i); |
| RECURSE(Visit(value)); |
| } |
| |
| NarrowType(expr, Bounds(Type::Array(isolate_))); |
| } |
| |
| |
| void AstTyper::VisitAssignment(Assignment* expr) { |
| // Collect type feedback. |
| Property* prop = expr->target()->AsProperty(); |
| if (prop != NULL) { |
| TypeFeedbackId id = expr->AssignmentFeedbackId(); |
| expr->set_is_uninitialized(oracle()->StoreIsUninitialized(id)); |
| if (!expr->IsUninitialized()) { |
| expr->set_is_pre_monomorphic(oracle()->StoreIsPreMonomorphic(id)); |
| if (prop->key()->IsPropertyName()) { |
| Literal* lit_key = prop->key()->AsLiteral(); |
| ASSERT(lit_key != NULL && lit_key->value()->IsString()); |
| Handle<String> name = Handle<String>::cast(lit_key->value()); |
| oracle()->AssignmentReceiverTypes(id, name, expr->GetReceiverTypes()); |
| } else { |
| KeyedAccessStoreMode store_mode; |
| oracle()->KeyedAssignmentReceiverTypes( |
| id, expr->GetReceiverTypes(), &store_mode); |
| expr->set_store_mode(store_mode); |
| } |
| ASSERT(!expr->IsPreMonomorphic() || !expr->IsMonomorphic()); |
| } |
| } |
| |
| Expression* rhs = |
| expr->is_compound() ? expr->binary_operation() : expr->value(); |
| RECURSE(Visit(expr->target())); |
| RECURSE(Visit(rhs)); |
| NarrowType(expr, rhs->bounds()); |
| |
| VariableProxy* proxy = expr->target()->AsVariableProxy(); |
| if (proxy != NULL && proxy->var()->IsStackAllocated()) { |
| store_.Seq(variable_index(proxy->var()), Effect(expr->bounds())); |
| } |
| } |
| |
| |
| void AstTyper::VisitYield(Yield* expr) { |
| RECURSE(Visit(expr->generator_object())); |
| RECURSE(Visit(expr->expression())); |
| |
| // We don't know anything about the result type. |
| } |
| |
| |
| void AstTyper::VisitThrow(Throw* expr) { |
| RECURSE(Visit(expr->exception())); |
| // TODO(rossberg): is it worth having a non-termination effect? |
| |
| NarrowType(expr, Bounds(Type::None(isolate_))); |
| } |
| |
| |
| void AstTyper::VisitProperty(Property* expr) { |
| // Collect type feedback. |
| TypeFeedbackId id = expr->PropertyFeedbackId(); |
| expr->set_is_uninitialized(oracle()->LoadIsUninitialized(id)); |
| if (!expr->IsUninitialized()) { |
| expr->set_is_pre_monomorphic(oracle()->LoadIsPreMonomorphic(id)); |
| if (expr->key()->IsPropertyName()) { |
| Literal* lit_key = expr->key()->AsLiteral(); |
| ASSERT(lit_key != NULL && lit_key->value()->IsString()); |
| Handle<String> name = Handle<String>::cast(lit_key->value()); |
| bool is_prototype; |
| oracle()->PropertyReceiverTypes( |
| id, name, expr->GetReceiverTypes(), &is_prototype); |
| expr->set_is_function_prototype(is_prototype); |
| } else { |
| bool is_string; |
| oracle()->KeyedPropertyReceiverTypes( |
| id, expr->GetReceiverTypes(), &is_string); |
| expr->set_is_string_access(is_string); |
| } |
| ASSERT(!expr->IsPreMonomorphic() || !expr->IsMonomorphic()); |
| } |
| |
| RECURSE(Visit(expr->obj())); |
| RECURSE(Visit(expr->key())); |
| |
| // We don't know anything about the result type. |
| } |
| |
| |
| void AstTyper::VisitCall(Call* expr) { |
| // Collect type feedback. |
| expr->RecordTypeFeedback(oracle()); |
| |
| RECURSE(Visit(expr->expression())); |
| ZoneList<Expression*>* args = expr->arguments(); |
| for (int i = 0; i < args->length(); ++i) { |
| Expression* arg = args->at(i); |
| RECURSE(Visit(arg)); |
| } |
| |
| VariableProxy* proxy = expr->expression()->AsVariableProxy(); |
| if (proxy != NULL && proxy->var()->is_possibly_eval(isolate())) { |
| store_.Forget(); // Eval could do whatever to local variables. |
| } |
| |
| // We don't know anything about the result type. |
| } |
| |
| |
| void AstTyper::VisitCallNew(CallNew* expr) { |
| // Collect type feedback. |
| expr->RecordTypeFeedback(oracle()); |
| |
| RECURSE(Visit(expr->expression())); |
| ZoneList<Expression*>* args = expr->arguments(); |
| for (int i = 0; i < args->length(); ++i) { |
| Expression* arg = args->at(i); |
| RECURSE(Visit(arg)); |
| } |
| |
| // We don't know anything about the result type. |
| } |
| |
| |
| void AstTyper::VisitCallRuntime(CallRuntime* expr) { |
| ZoneList<Expression*>* args = expr->arguments(); |
| for (int i = 0; i < args->length(); ++i) { |
| Expression* arg = args->at(i); |
| RECURSE(Visit(arg)); |
| } |
| |
| // We don't know anything about the result type. |
| } |
| |
| |
| void AstTyper::VisitUnaryOperation(UnaryOperation* expr) { |
| // Collect type feedback. |
| if (expr->op() == Token::NOT) { |
| // TODO(rossberg): only do in test or value context. |
| expr->expression()->RecordToBooleanTypeFeedback(oracle()); |
| } |
| |
| RECURSE(Visit(expr->expression())); |
| |
| switch (expr->op()) { |
| case Token::NOT: |
| case Token::DELETE: |
| NarrowType(expr, Bounds(Type::Boolean(isolate_))); |
| break; |
| case Token::VOID: |
| NarrowType(expr, Bounds(Type::Undefined(isolate_))); |
| break; |
| case Token::TYPEOF: |
| NarrowType(expr, Bounds(Type::InternalizedString(isolate_))); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void AstTyper::VisitCountOperation(CountOperation* expr) { |
| // Collect type feedback. |
| TypeFeedbackId store_id = expr->CountStoreFeedbackId(); |
| expr->set_store_mode(oracle()->GetStoreMode(store_id)); |
| oracle()->CountReceiverTypes(store_id, expr->GetReceiverTypes()); |
| expr->set_type(oracle()->CountType(expr->CountBinOpFeedbackId())); |
| // TODO(rossberg): merge the count type with the generic expression type. |
| |
| RECURSE(Visit(expr->expression())); |
| |
| NarrowType(expr, Bounds(Type::Smi(isolate_), Type::Number(isolate_))); |
| |
| VariableProxy* proxy = expr->expression()->AsVariableProxy(); |
| if (proxy != NULL && proxy->var()->IsStackAllocated()) { |
| store_.Seq(variable_index(proxy->var()), Effect(expr->bounds())); |
| } |
| } |
| |
| |
| void AstTyper::VisitBinaryOperation(BinaryOperation* expr) { |
| // Collect type feedback. |
| Handle<Type> type, left_type, right_type; |
| Maybe<int> fixed_right_arg; |
| Handle<AllocationSite> allocation_site; |
| oracle()->BinaryType(expr->BinaryOperationFeedbackId(), |
| &left_type, &right_type, &type, &fixed_right_arg, |
| &allocation_site, expr->op()); |
| NarrowLowerType(expr, type); |
| NarrowLowerType(expr->left(), left_type); |
| NarrowLowerType(expr->right(), right_type); |
| expr->set_allocation_site(allocation_site); |
| expr->set_fixed_right_arg(fixed_right_arg); |
| if (expr->op() == Token::OR || expr->op() == Token::AND) { |
| expr->left()->RecordToBooleanTypeFeedback(oracle()); |
| } |
| |
| switch (expr->op()) { |
| case Token::COMMA: |
| RECURSE(Visit(expr->left())); |
| RECURSE(Visit(expr->right())); |
| NarrowType(expr, expr->right()->bounds()); |
| break; |
| case Token::OR: |
| case Token::AND: { |
| Effects left_effects = EnterEffects(); |
| RECURSE(Visit(expr->left())); |
| ExitEffects(); |
| Effects right_effects = EnterEffects(); |
| RECURSE(Visit(expr->right())); |
| ExitEffects(); |
| left_effects.Alt(right_effects); |
| store_.Seq(left_effects); |
| |
| NarrowType(expr, Bounds::Either( |
| expr->left()->bounds(), expr->right()->bounds(), isolate_)); |
| break; |
| } |
| case Token::BIT_OR: |
| case Token::BIT_AND: { |
| RECURSE(Visit(expr->left())); |
| RECURSE(Visit(expr->right())); |
| Handle<Type> upper = Type::Union( |
| expr->left()->bounds().upper, expr->right()->bounds().upper, |
| isolate_); |
| if (!upper->Is(Type::Signed32())) |
| upper = Type::Signed32(isolate_); |
| Handle<Type> lower = |
| Type::Intersect(Type::Smi(isolate_), upper, isolate_); |
| NarrowType(expr, Bounds(lower, upper)); |
| break; |
| } |
| case Token::BIT_XOR: |
| case Token::SHL: |
| case Token::SAR: |
| RECURSE(Visit(expr->left())); |
| RECURSE(Visit(expr->right())); |
| NarrowType(expr, Bounds(Type::Smi(isolate_), Type::Signed32(isolate_))); |
| break; |
| case Token::SHR: |
| RECURSE(Visit(expr->left())); |
| RECURSE(Visit(expr->right())); |
| // TODO(rossberg): The upper bound would be Unsigned32, but since there |
| // is no 'positive Smi' type for the lower bound, we use the smallest |
| // union of Smi and Unsigned32 as upper bound instead. |
| NarrowType(expr, Bounds(Type::Smi(isolate_), Type::Number(isolate_))); |
| break; |
| case Token::ADD: { |
| RECURSE(Visit(expr->left())); |
| RECURSE(Visit(expr->right())); |
| Bounds l = expr->left()->bounds(); |
| Bounds r = expr->right()->bounds(); |
| Handle<Type> lower = |
| l.lower->Is(Type::None()) || r.lower->Is(Type::None()) ? |
| Type::None(isolate_) : |
| l.lower->Is(Type::String()) || r.lower->Is(Type::String()) ? |
| Type::String(isolate_) : |
| l.lower->Is(Type::Number()) && r.lower->Is(Type::Number()) ? |
| Type::Smi(isolate_) : Type::None(isolate_); |
| Handle<Type> upper = |
| l.upper->Is(Type::String()) || r.upper->Is(Type::String()) ? |
| Type::String(isolate_) : |
| l.upper->Is(Type::Number()) && r.upper->Is(Type::Number()) ? |
| Type::Number(isolate_) : Type::NumberOrString(isolate_); |
| NarrowType(expr, Bounds(lower, upper)); |
| break; |
| } |
| case Token::SUB: |
| case Token::MUL: |
| case Token::DIV: |
| case Token::MOD: |
| RECURSE(Visit(expr->left())); |
| RECURSE(Visit(expr->right())); |
| NarrowType(expr, Bounds(Type::Smi(isolate_), Type::Number(isolate_))); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void AstTyper::VisitCompareOperation(CompareOperation* expr) { |
| // Collect type feedback. |
| Handle<Type> left_type, right_type, combined_type; |
| oracle()->CompareType(expr->CompareOperationFeedbackId(), |
| &left_type, &right_type, &combined_type); |
| NarrowLowerType(expr->left(), left_type); |
| NarrowLowerType(expr->right(), right_type); |
| expr->set_combined_type(combined_type); |
| |
| RECURSE(Visit(expr->left())); |
| RECURSE(Visit(expr->right())); |
| |
| NarrowType(expr, Bounds(Type::Boolean(isolate_))); |
| } |
| |
| |
| void AstTyper::VisitThisFunction(ThisFunction* expr) { |
| } |
| |
| |
| void AstTyper::VisitDeclarations(ZoneList<Declaration*>* decls) { |
| for (int i = 0; i < decls->length(); ++i) { |
| Declaration* decl = decls->at(i); |
| RECURSE(Visit(decl)); |
| } |
| } |
| |
| |
| void AstTyper::VisitVariableDeclaration(VariableDeclaration* declaration) { |
| } |
| |
| |
| void AstTyper::VisitFunctionDeclaration(FunctionDeclaration* declaration) { |
| RECURSE(Visit(declaration->fun())); |
| } |
| |
| |
| void AstTyper::VisitModuleDeclaration(ModuleDeclaration* declaration) { |
| RECURSE(Visit(declaration->module())); |
| } |
| |
| |
| void AstTyper::VisitImportDeclaration(ImportDeclaration* declaration) { |
| RECURSE(Visit(declaration->module())); |
| } |
| |
| |
| void AstTyper::VisitExportDeclaration(ExportDeclaration* declaration) { |
| } |
| |
| |
| void AstTyper::VisitModuleLiteral(ModuleLiteral* module) { |
| RECURSE(Visit(module->body())); |
| } |
| |
| |
| void AstTyper::VisitModuleVariable(ModuleVariable* module) { |
| } |
| |
| |
| void AstTyper::VisitModulePath(ModulePath* module) { |
| RECURSE(Visit(module->module())); |
| } |
| |
| |
| void AstTyper::VisitModuleUrl(ModuleUrl* module) { |
| } |
| |
| |
| void AstTyper::VisitModuleStatement(ModuleStatement* stmt) { |
| RECURSE(Visit(stmt->body())); |
| } |
| |
| |
| } } // namespace v8::internal |