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