CfgPurgeTests.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/ir/cfg-structure.hpp>
#include <jlm/llvm/ir/ipgraph-module.hpp>
#include <jlm/llvm/ir/operators/operators.hpp>
#include <jlm/llvm/ir/print.hpp>
 
TEST(ControLFlowGraphPurgeTests, test)
{
  using namespace jlm::llvm;
 
  InterProceduralGraphModule module(jlm::util::FilePath(""), "", "");
 
  ControlFlowGraph cfg(module);
  auto bb0 = BasicBlock::create(cfg);
  auto bb1 = BasicBlock::create(cfg);
 
  auto op = std::make_unique<jlm::rvsdg::ControlConstantOperation>(
      jlm::rvsdg::ControlValueRepresentation(1, 2));
  bb0->append_last(ThreeAddressCode::create(std::move(op), {}));
  bb0->append_last(BranchOperation::create(2, bb0->last()->result(0)));
 
  cfg.exit()->divert_inedges(bb0);
  bb0->add_outedge(bb1);
  bb0->add_outedge(cfg.exit());
  bb1->add_outedge(bb1);
 
  std::cout << ControlFlowGraph::ToAscii(cfg) << std::flush;
 
  purge(cfg);
 
  EXPECT_EQ(cfg.nnodes(), 2u);
}