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// Copyright 2017 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.
#ifndef V8_TORQUE_DECLARATION_VISITOR_H_
#define V8_TORQUE_DECLARATION_VISITOR_H_
#include <set>
#include <string>
#include "src/base/macros.h"
#include "src/torque/declarations.h"
#include "src/torque/file-visitor.h"
#include "src/torque/global-context.h"
#include "src/torque/scope.h"
#include "src/torque/types.h"
#include "src/torque/utils.h"
namespace v8 {
namespace internal {
namespace torque {
class DeclarationVisitor : public FileVisitor {
public:
explicit DeclarationVisitor(GlobalContext& global_context)
: FileVisitor(global_context),
scope_(declarations(), global_context.GetDefaultModule()) {}
void Visit(Ast* ast) {
Visit(ast->default_module());
DrainSpecializationQueue();
}
void Visit(Expression* expr);
void Visit(Statement* stmt);
void Visit(Declaration* decl);
void Visit(ModuleDeclaration* decl) {
ScopedModuleActivator activator(this, decl->GetModule());
Declarations::ModuleScopeActivator scope(declarations(), decl->GetModule());
for (Declaration* child : decl->declarations) Visit(child);
}
void Visit(DefaultModuleDeclaration* decl) {
decl->SetModule(global_context_.GetDefaultModule());
Visit(implicit_cast<ModuleDeclaration*>(decl));
}
void Visit(ExplicitModuleDeclaration* decl) {
decl->SetModule(global_context_.GetModule(decl->name));
Visit(implicit_cast<ModuleDeclaration*>(decl));
}
void Visit(IdentifierExpression* expr);
void Visit(NumberLiteralExpression* expr) {}
void Visit(StringLiteralExpression* expr) {}
void Visit(CallExpression* expr);
void Visit(ElementAccessExpression* expr) {
Visit(expr->array);
Visit(expr->index);
}
void Visit(FieldAccessExpression* expr) { Visit(expr->object); }
void Visit(BlockStatement* expr) {
Declarations::NodeScopeActivator scope(declarations(), expr);
for (Statement* stmt : expr->statements) Visit(stmt);
}
void Visit(ExpressionStatement* stmt) { Visit(stmt->expression); }
void Visit(TailCallStatement* stmt) { Visit(stmt->call); }
void Visit(TypeDeclaration* decl);
void Visit(TypeAliasDeclaration* decl) {
const Type* type = declarations()->GetType(decl->type);
type->AddAlias(decl->name);
declarations()->DeclareType(decl->name, type);
}
Builtin* BuiltinDeclarationCommon(BuiltinDeclaration* decl, bool external,
const Signature& signature);
void Visit(ExternalBuiltinDeclaration* decl, const Signature& signature,
Statement* body) {
BuiltinDeclarationCommon(decl, true, signature);
}
void Visit(ExternalRuntimeDeclaration* decl, const Signature& sig,
Statement* body);
void Visit(ExternalMacroDeclaration* decl, const Signature& sig,
Statement* body);
void Visit(TorqueBuiltinDeclaration* decl, const Signature& signature,
Statement* body);
void Visit(TorqueMacroDeclaration* decl, const Signature& signature,
Statement* body);
void Visit(CallableNode* decl, const Signature& signature, Statement* body);
void Visit(ConstDeclaration* decl);
void Visit(StandardDeclaration* decl);
void Visit(GenericDeclaration* decl);
void Visit(SpecializationDeclaration* decl);
void Visit(ReturnStatement* stmt);
void Visit(DebugStatement* stmt) {}
void Visit(AssertStatement* stmt) {
bool do_check = !stmt->debug_only;
#if defined(DEBUG)
do_check = true;
#endif
if (do_check) DeclareExpressionForBranch(stmt->expression);
}
void Visit(VarDeclarationStatement* stmt);
void Visit(ExternConstDeclaration* decl);
void Visit(StructDeclaration* decl);
void Visit(StructExpression* decl) {}
void Visit(LogicalOrExpression* expr);
void Visit(LogicalAndExpression* expr);
void DeclareExpressionForBranch(Expression* node);
void Visit(ConditionalExpression* expr);
void Visit(IfStatement* stmt);
void Visit(WhileStatement* stmt);
void Visit(ForOfLoopStatement* stmt);
void Visit(AssignmentExpression* expr) {
MarkLocationModified(expr->location);
Visit(expr->location);
Visit(expr->value);
}
void Visit(BreakStatement* stmt) {}
void Visit(ContinueStatement* stmt) {}
void Visit(GotoStatement* expr) {}
void Visit(ForLoopStatement* stmt);
void Visit(IncrementDecrementExpression* expr) {
MarkLocationModified(expr->location);
Visit(expr->location);
}
void Visit(TryLabelStatement* stmt);
void GenerateHeader(std::string& file_name);
private:
struct LiveAndChanged {
std::set<const Variable*> live;
std::set<const Variable*> changed;
};
void PushControlSplit() {
LiveAndChanged live_and_changed;
live_and_changed.live = declarations()->GetLiveVariables();
live_and_changed_variables_.push_back(live_and_changed);
}
Variable* DeclareVariable(const std::string& name, const Type* type,
bool is_const);
Parameter* DeclareParameter(const std::string& name, const Type* type);
std::set<const Variable*> PopControlSplit() {
auto result = live_and_changed_variables_.back().changed;
live_and_changed_variables_.pop_back();
return result;
}
void MarkLocationModified(Expression* location);
bool MarkVariableModified(const Variable* variable);
void DeclareSignature(const Signature& signature);
void DeclareSpecializedTypes(const SpecializationKey& key);
void Specialize(const SpecializationKey& key, CallableNode* callable,
const CallableNodeSignature* signature,
Statement* body) override;
Declarations::ModuleScopeActivator scope_;
std::vector<Builtin*> torque_builtins_;
std::vector<LiveAndChanged> live_and_changed_variables_;
};
} // namespace torque
} // namespace internal
} // namespace v8
#endif // V8_TORQUE_DECLARATION_VISITOR_H_
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