Templatise type representation

src/typing.cc

 // 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
@@ skipping 326 matching lines @@
 
 void AstTyper::VisitVariableProxy(VariableProxy* expr) {
   Variable* var = expr->var();
   if (var->IsStackAllocated()) {
     NarrowType(expr, store_.LookupBounds(variable_index(var)));
   }
 }
 
 
 void AstTyper::VisitLiteral(Literal* expr) {
-  Type* type = Type::Constant(expr->value(), isolate_);
-  NarrowType(expr, Bounds(type, isolate_));
+  Handle<Type> type = Type::Constant(expr->value(), isolate_);
+  NarrowType(expr, Bounds(type));
 }
 
 
 void AstTyper::VisitRegExpLiteral(RegExpLiteral* expr) {
-  NarrowType(expr, Bounds(Type::RegExp(), isolate_));
+  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_));
+  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_));
+  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()) {
@@ skipping 32 matching lines @@
   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_));
+  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));
     expr->set_is_monomorphic(oracle()->LoadIsMonomorphicNormal(id));
@@ skipping 78 matching lines @@
   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_));
+      NarrowType(expr, Bounds(Type::Boolean(isolate_)));
       break;
     case Token::VOID:
-      NarrowType(expr, Bounds(Type::Undefined(), isolate_));
+      NarrowType(expr, Bounds(Type::Undefined(isolate_)));
       break;
     case Token::TYPEOF:
-      NarrowType(expr, Bounds(Type::InternalizedString(), isolate_));
+      NarrowType(expr, Bounds(Type::InternalizedString(isolate_)));
       break;
     default:
       UNREACHABLE();
   }
 }
 
 
 void AstTyper::VisitCountOperation(CountOperation* expr) {
   // Collect type feedback.
   TypeFeedbackId store_id = expr->CountStoreFeedbackId();
   expr->set_is_monomorphic(oracle()->StoreIsMonomorphicNormal(store_id));
   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(), Type::Number(), isolate_));
+  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.
@@ skipping 27 matching lines @@
       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),
+      Handle<Type> upper = Type::Union(
+          expr->left()->bounds().upper, expr->right()->bounds().upper,
           isolate_);
       if (!upper->Is(Type::Signed32()))
-        upper = handle(Type::Signed32(), isolate_);
-      Handle<Type> lower(Type::Intersect(
-          handle(Type::Smi(), isolate_), upper), isolate_);
+        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(), Type::Signed32(), isolate_));
+      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(), Type::Number(), isolate_));
+      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();
-      Type* lower =
+      Handle<Type> lower =
           l.lower->Is(Type::None()) || r.lower->Is(Type::None()) ?
-              Type::None() :
+              Type::None(isolate_) :
           l.lower->Is(Type::String()) || r.lower->Is(Type::String()) ?
-              Type::String() :
+              Type::String(isolate_) :
           l.lower->Is(Type::Number()) && r.lower->Is(Type::Number()) ?
-              Type::Smi() : Type::None();
-      Type* upper =
+              Type::Smi(isolate_) : Type::None(isolate_);
+      Handle<Type> upper =
           l.upper->Is(Type::String()) || r.upper->Is(Type::String()) ?
-              Type::String() :
+              Type::String(isolate_) :
           l.upper->Is(Type::Number()) && r.upper->Is(Type::Number()) ?
-              Type::Number() : Type::NumberOrString();
-      NarrowType(expr, Bounds(lower, upper, isolate_));
+              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(), Type::Number(), isolate_));
+      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_));
+  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);
@@ skipping 42 matching lines @@
 void AstTyper::VisitModuleUrl(ModuleUrl* module) {
 }
 
 
 void AstTyper::VisitModuleStatement(ModuleStatement* stmt) {
   RECURSE(Visit(stmt->body()));
 }
 
 
 } }  // namespace v8::internal