SsaDestructionTests.cpp

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/*
 * Copyright 2017 Nico Reißmann <nico.reissmann@gmail.com>
 * See COPYING for terms of redistribution.
 */
 
#include <gtest/gtest.h>
 
#include <jlm/llvm/ir/basic-block.hpp>
#include <jlm/llvm/ir/ipgraph-module.hpp>
#include <jlm/llvm/ir/operators/operators.hpp>
#include <jlm/llvm/ir/ssa.hpp>
#include <jlm/rvsdg/TestOperations.hpp>
#include <jlm/rvsdg/TestType.hpp>
 
TEST(StaticSingleAssignmentDestructionTests, test_two_phis)
{
  using namespace jlm::llvm;
  using namespace jlm::rvsdg;
 
  auto vt = jlm::rvsdg::TestType::createValueType();
  InterProceduralGraphModule module(jlm::util::FilePath(""), "", "");
 
  ControlFlowGraph cfg(module);
  auto bb1 = BasicBlock::create(cfg);
  auto bb2 = BasicBlock::create(cfg);
  auto bb3 = BasicBlock::create(cfg);
  auto bb4 = BasicBlock::create(cfg);
 
  cfg.exit()->divert_inedges(bb1);
  bb1->add_outedge(bb2);
  bb1->add_outedge(bb3);
  bb2->add_outedge(bb4);
  bb3->add_outedge(bb4);
  bb4->add_outedge(cfg.exit());
 
  bb2->append_last(ThreeAddressCode::create(TestOperation::create({}, { vt }), {}));
  auto v1 = bb2->last()->result(0);
 
  bb2->append_last(ThreeAddressCode::create(TestOperation::create({}, { vt }), {}));
  auto v3 = bb2->last()->result(0);
 
  bb3->append_last(ThreeAddressCode::create(TestOperation::create({}, { vt }), {}));
  auto v2 = bb3->last()->result(0);
 
  bb3->append_last(ThreeAddressCode::create(TestOperation::create({}, { vt }), {}));
  auto v4 = bb3->last()->result(0);
 
  bb4->append_last(SsaPhiOperation::create({ { v1, bb2 }, { v2, bb3 } }, vt));
  bb4->append_last(SsaPhiOperation::create({ { v3, bb2 }, { v4, bb3 } }, vt));
 
  std::cout << ControlFlowGraph::ToAscii(cfg) << std::flush;
 
  destruct_ssa(cfg);
 
  std::cout << ControlFlowGraph::ToAscii(cfg) << std::flush;
}