C++ Function::getParent方法代码示例

bool Unboxing::runOnFunction(llvm::Function & f) {
    //std::cout << "running Unboxing optimization..." << std::endl;
    m = reinterpret_cast<RiftModule*>(f.getParent());
    ta = &getAnalysis<TypeAnalysis>();
    for (auto & b : f) {
        auto i = b.begin();
        while (i != b.end()) {
            ins = i;
            bool erase = false;
            if (CallInst * ci = dyn_cast<CallInst>(ins)) {
                StringRef s = ci->getCalledFunction()->getName();
                if (s == "genericAdd") {
                    erase = genericArithmetic(Instruction::FAdd);
                } else if (s == "genericSub") {
                    erase = genericArithmetic(Instruction::FSub);
                } else if (s == "genericMul") {
                    erase = genericArithmetic(Instruction::FMul);
                } else if (s == "genericDiv") {
                    erase = genericArithmetic(Instruction::FDiv);
                } else if (s == "genericLt") {
                    erase = genericRelational(FCmpInst::FCMP_OLT);
                } else if (s == "genericGt") {
                    erase = genericRelational(FCmpInst::FCMP_OGT);
                } else if (s == "genericEq") {
                    erase = genericRelational(FCmpInst::FCMP_OEQ);
                } else if (s == "genericNeq") {
                    erase = genericRelational(FCmpInst::FCMP_ONE);
                } else if (s == "genericGetElement") {
                    erase = genericGetElement();
                }
            }
            if (erase) {
                llvm::Instruction * v = i;
                ++i;
                state().erase(v);
                v->eraseFromParent();
            } else {
                ++i;
            }
        }
    }
    if (DEBUG) {
        cout << "After unboxing optimization: --------------------------------" << endl;
        f.dump();
        state().print(cout);
    }
    return false;
}

bool MemoryAnalyzer::runOnFunction(llvm::Function &function)
{
    m_globals.clear();
    m_map.clear();
    m_mayZap.clear();
    llvm::Module *module = function.getParent();
    for (llvm::Module::global_iterator global = module->global_begin(), globale = module->global_end(); global != globale; ++global) {
        const llvm::Type *globalType = llvm::cast<llvm::PointerType>(global->getType())->getContainedType(0);
        if (llvm::isa<llvm::IntegerType>(globalType)) {
            m_globals.insert(&*global);
        }
    }
#if LLVM_VERSION < VERSION(3, 8)
    m_aa = &getAnalysis<llvm::AliasAnalysis>();
#else
    m_aa = &getAnalysis<llvm::AAResultsWrapperPass>().getAAResults();
#endif
    visit(function);
    return false;
}

    bool _runOnFunction(llvm::Function& f) {
        Timer _t2("(sum)");
        Timer _t("initializing");
        initialize();
        _t.split("overhead");

        // f.dump();

        llvm::Module* cur_module = f.getParent();

#if LLVMREV < 217548
        llvm::PassManager fake_pm;
#else
        llvm::legacy::PassManager fake_pm;
#endif
        llvm::InlineCostAnalysis* cost_analysis = new llvm::InlineCostAnalysis();
        fake_pm.add(cost_analysis);
        // llvm::errs() << "doing fake run\n";
        fake_pm.run(*fake_module);
        // llvm::errs() << "done with fake run\n";

        bool did_any_inlining = false;

        // TODO I haven't gotten the callgraph-updating part of the inliner to work,
        // so it's not easy to tell what callsites have been inlined into (ie added to)
        // the function.
        // One simple-but-not-great way to handle it is to just iterate over the entire function
        // multiple times and re-inline things until we don't want to inline any more;
        // NPASSES controls the maximum number of times to attempt that.
        // Right now we actually don't need that, since we only inline fully-optimized
        // functions (from the stdlib), and those will already have had inlining
        // applied recursively.
        const int NPASSES = 1;
        for (int passnum = 0; passnum < NPASSES; passnum++) {
            _t.split("collecting calls");

            std::vector<llvm::CallSite> calls;
            for (llvm::inst_iterator I = llvm::inst_begin(f), E = llvm::inst_end(f); I != E; ++I) {
                llvm::CallInst* call = llvm::dyn_cast<llvm::CallInst>(&(*I));
                // From Inliner.cpp:
                if (!call || llvm::isa<llvm::IntrinsicInst>(call))
                    continue;
                // I->dump();
                llvm::CallSite CS(call);

                llvm::Value* v = CS.getCalledValue();
                llvm::ConstantExpr* ce = llvm::dyn_cast<llvm::ConstantExpr>(v);
                if (!ce)
                    continue;

                assert(ce->isCast());
                llvm::ConstantInt* l_addr = llvm::cast<llvm::ConstantInt>(ce->getOperand(0));
                int64_t addr = l_addr->getSExtValue();

                if (addr == (int64_t)printf)
                    continue;
                llvm::Function* f = g.func_addr_registry.getLLVMFuncAtAddress((void*)addr);
                if (f == NULL) {
                    if (VERBOSITY()) {
                        printf("Giving up on inlining %s:\n",
                               g.func_addr_registry.getFuncNameAtAddress((void*)addr, true).c_str());
                        call->dump();
                    }
                    continue;
                }

                // We load the bitcode lazily, so check if we haven't yet fully loaded the function:
                if (f->isMaterializable()) {
#if LLVMREV < 220600
                    f->Materialize();
#else
                    f->materialize();
#endif
                }

                // It could still be a declaration, though I think the code won't generate this case any more:
                if (f->isDeclaration())
                    continue;

                // Keep this section as a release_assert since the code-to-be-inlined, as well as the inlining
                // decisions, can be different in release mode:
                int op_idx = -1;
                for (llvm::Argument& arg : f->args()) {
                    ++op_idx;
                    llvm::Type* op_type = call->getOperand(op_idx)->getType();
                    if (arg.getType() != op_type) {
                        llvm::errs() << f->getName() << " has arg " << op_idx << " mismatched!\n";
                        llvm::errs() << "Given ";
                        op_type->dump();
                        llvm::errs() << " but underlying function expected ";
                        arg.getType()->dump();
                        llvm::errs() << '\n';
                    }
                    RELEASE_ASSERT(arg.getType() == call->getOperand(op_idx)->getType(), "");
                }

                assert(!f->isDeclaration());
                CS.setCalledFunction(f);
                calls.push_back(CS);
            }
//.........这里部分代码省略.........