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//===--- ByteCodeStmtGen.h - Code generator for expressions -----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Defines the constexpr bytecode compiler.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_INTERP_BYTECODESTMTGEN_H
#define LLVM_CLANG_AST_INTERP_BYTECODESTMTGEN_H
#include "ByteCodeEmitter.h"
#include "ByteCodeExprGen.h"
#include "EvalEmitter.h"
#include "Pointer.h"
#include "PrimType.h"
#include "Record.h"
#include "clang/AST/Decl.h"
#include "clang/AST/Expr.h"
#include "clang/AST/StmtVisitor.h"
#include "llvm/ADT/Optional.h"
namespace clang {
namespace interp {
template <class Emitter> class LoopScope;
template <class Emitter> class SwitchScope;
template <class Emitter> class LabelScope;
/// Compilation context for statements.
template <class Emitter>
class ByteCodeStmtGen : public ByteCodeExprGen<Emitter> {
using LabelTy = typename Emitter::LabelTy;
using AddrTy = typename Emitter::AddrTy;
using OptLabelTy = llvm::Optional<LabelTy>;
using CaseMap = llvm::DenseMap<const SwitchCase *, LabelTy>;
public:
template<typename... Tys>
ByteCodeStmtGen(Tys&&... Args)
: ByteCodeExprGen<Emitter>(std::forward<Tys>(Args)...) {}
protected:
bool visitFunc(const FunctionDecl *F) override;
private:
friend class LabelScope<Emitter>;
friend class LoopScope<Emitter>;
friend class SwitchScope<Emitter>;
// Statement visitors.
bool visitStmt(const Stmt *S);
bool visitCompoundStmt(const CompoundStmt *S);
bool visitDeclStmt(const DeclStmt *DS);
bool visitReturnStmt(const ReturnStmt *RS);
bool visitIfStmt(const IfStmt *IS);
/// Compiles a variable declaration.
bool visitVarDecl(const VarDecl *VD);
private:
/// Type of the expression returned by the function.
llvm::Optional<PrimType> ReturnType;
/// Switch case mapping.
CaseMap CaseLabels;
/// Point to break to.
OptLabelTy BreakLabel;
/// Point to continue to.
OptLabelTy ContinueLabel;
/// Default case label.
OptLabelTy DefaultLabel;
};
extern template class ByteCodeExprGen<EvalEmitter>;
} // namespace interp
} // namespace clang
#endif
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