lib/codegen/DomainInstance.h

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//===-- codegen/DomainInstance.h ------------------------------ -*- C++ -*-===//
//
// This file is distributed under the MIT license. See LICENSE.txt for details.
//
// Copyright (C) 2009-2010, Stephen Wilson
//
//===----------------------------------------------------------------------===//

#ifndef COMMA_CODEGEN_DOMAININSTANCE_HDR_GUARD
#define COMMA_CODEGEN_DOMAININSTANCE_HDR_GUARD

#include "CodeGen.h"

#include "llvm/Support/IRBuilder.h"

namespace comma {

class CommaRT;

class DomainInstance {

public:
    DomainInstance(CommaRT &CRT);

    void init();

    enum FieldId {
        Info,
        Next,
        Params,
        Requirements
    };

    const std::string &getTypeName() const { return theTypeName; }

    const llvm::StructType *getType() const;

    const llvm::PointerType *getPointerTypeTo() const;

    template <FieldId F>
    struct FieldIdTraits {
        typedef const llvm::PointerType FieldType;
    };

    template <FieldId F>
    typename FieldIdTraits<F>::FieldType *getFieldType() const;

    llvm::Value *loadInfo(llvm::IRBuilder<> &builder,
                          llvm::Value *Instance) const;

    llvm::Value *loadParamVec(llvm::IRBuilder<> &builder,
                              llvm::Value *instance) const;

    llvm::Value *loadParam(llvm::IRBuilder<> &builder,
                           llvm::Value *instance,
                           unsigned paramIdx) const;

    llvm::Value *loadLocalVec(llvm::IRBuilder<> &builder,
                              llvm::Value *instance) const;

    void setLocalVec(llvm::IRBuilder<> &builder,
                     llvm::Value *instance,
                     llvm::Value *vec) const;

    llvm::Value *loadLocalInstance(llvm::IRBuilder<> &builder,
                                   llvm::Value *instance,
                                   unsigned localID) const;

private:
    CommaRT &CRT;
    CodeGen &CG;
    const llvm::TargetData &TD;

    static const std::string theTypeName;

    llvm::PATypeHolder theType;
};

//===----------------------------------------------------------------------===//
// DomainInstance::getFieldType specializations for each field in a
// domain_instance.

template <> inline
DomainInstance::FieldIdTraits<DomainInstance::Info>::FieldType *
DomainInstance::getFieldType<DomainInstance::Info>() const {
    typedef FieldIdTraits<Info>::FieldType FTy;
    return llvm::cast<FTy>(getType()->getElementType(Info));
}

template <> inline
DomainInstance::FieldIdTraits<DomainInstance::Next>::FieldType *
DomainInstance::getFieldType<DomainInstance::Next>() const {
    typedef FieldIdTraits<Next>::FieldType FTy;
    return llvm::cast<FTy>(getType()->getElementType(Next));
}

template <> inline
DomainInstance::FieldIdTraits<DomainInstance::Params>::FieldType *
DomainInstance::getFieldType<DomainInstance::Params>() const {
    typedef FieldIdTraits<Params>::FieldType FTy;
    return llvm::cast<FTy>(getType()->getElementType(Params));
}

template <> inline
DomainInstance::FieldIdTraits<DomainInstance::Requirements>::FieldType *
DomainInstance::getFieldType<DomainInstance::Requirements>() const {
    typedef FieldIdTraits<Requirements>::FieldType FTy;
    return llvm::cast<FTy>(getType()->getElementType(Requirements));
}

} // end comma namespace.

#endif

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