EndlessLoopTests.cpp

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/*
 * Copyright 2021 Nico Reißmann <nico.reissmann@gmail.com>
 * See COPYING for terms of redistribution.
 */
 
#include <gtest/gtest.h>
 
#include <jlm/llvm/frontend/LlvmModuleConversion.hpp>
#include <jlm/llvm/ir/print.hpp>
 
#include <llvm/IR/BasicBlock.h>
#include <llvm/IR/IRBuilder.h>
#include <llvm/IR/Module.h>
 
TEST(EndlessLoopTests, test)
{
  auto setup = [](llvm::LLVMContext & ctx)
  {
    using namespace ::llvm;
 
    std::unique_ptr<Module> module(new Module("module", ctx));
 
    auto int64 = Type::getIntNTy(ctx, 64);
 
    auto fcttype = FunctionType::get(int64, {}, false);
    auto fct = Function::Create(fcttype, GlobalValue::ExternalLinkage, "f", module.get());
 
    auto bb1 = BasicBlock::Create(ctx, "", fct);
    auto bb2 = BasicBlock::Create(ctx, "", fct);
 
    IRBuilder<> builder(bb1);
    builder.CreateBr(bb2);
    builder.SetInsertPoint(bb2);
    builder.CreateBr(bb2);
 
    return module;
  };
 
  llvm::LLVMContext ctx;
  auto llvmModule = setup(ctx);
  llvmModule->print(llvm::errs(), nullptr);
 
  auto ipgModule = jlm::llvm::ConvertLlvmModule(*llvmModule);
  print(*ipgModule, stdout);
}