LinkBitcode.cc

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/*
    Copyright (c) 2002-2020 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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/**
 * @file LinkBitcode.cc
 *
 * Links other bitcode module to module.
 *
 * @author Mikael Lepistö 2008 (mikael.lepisto@tut.fi)
 */
 
#define DEBUG_TYPE "linkbitcode"
 
#include "CompilerWarnings.hh"
IGNORE_COMPILER_WARNING("-Wunused-parameter")
 
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "tce_config.h"
#include "llvm/IR/Module.h"
#include "llvm/Pass.h"
#include "llvm/Linker/Linker.h"
 
 
POP_COMPILER_DIAGS
 
using namespace llvm;
 
#include <iostream>
#include <memory>
#include <map>
 
namespace {
    class LinkBitcode : public FunctionPass {
    public:
        static char ID; // Pass ID, replacement for typeid       
        LinkBitcode(Module& input);
        virtual ~LinkBitcode();        
 
        // from llvm::Pass:
        bool doInitialization(Module &M);
        bool doFinalization (Module &M);
 
        // to suppress Clang warnings
        using llvm::FunctionPass::doInitialization;
        using llvm::FunctionPass::doFinalization;
        bool runOnFunction(Function &F);
 
    private:
        Module& inputModule_;
    };
 
    char LinkBitcode::ID = 0;
// cannot be used as plugin pass right now..
//    RegisterPass<LinkBitcode>
//    X("linkbitcode", "Links in other bitcode module to currently handled module.");    
}
 
 
/**
 * Constructor
 */
LinkBitcode::LinkBitcode(Module& input) :
    FunctionPass(ID),
    inputModule_(input) {
}
 
/**
 * Destructor
 */
LinkBitcode::~LinkBitcode() {}
 
 
// Publically exposed interface to pass.
// const PassInfo* LinkBitcodeID = X.getPassInfo();
 
Pass* createLinkBitcodePass(Module& input) {
    return new LinkBitcode(input);
}
 
bool
LinkBitcode::doFinalization(Module& /*M*/) {
    return true;
}
 
bool
LinkBitcode::doInitialization(Module& M) {
    if (Linker::linkModules(M, std::unique_ptr<Module>(&inputModule_))) {
        errs() << "Error during linking in LinkBitcodePass: " << "\n";
    }
    return true;
}
 
bool
LinkBitcode::runOnFunction(Function&) {
    return true;
}