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#include "clang/Analysis/FlowSensitive/MapLattice.h"
#include "clang/Analysis/FlowSensitive/DataflowLattice.h"
#include "llvm/Support/Error.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <ostream>
using namespace clang;
using namespace dataflow;
namespace {
// A simple lattice for basic tests.
class BooleanLattice {
public:
BooleanLattice() : Value(false) {}
explicit BooleanLattice(bool B) : Value(B) {}
static BooleanLattice bottom() { return BooleanLattice(false); }
static BooleanLattice top() { return BooleanLattice(true); }
LatticeJoinEffect join(BooleanLattice Other) {
auto Prev = Value;
Value = Value || Other.Value;
return Prev == Value ? LatticeJoinEffect::Unchanged
: LatticeJoinEffect::Changed;
}
friend bool operator==(BooleanLattice LHS, BooleanLattice RHS) {
return LHS.Value == RHS.Value;
}
friend bool operator!=(BooleanLattice LHS, BooleanLattice RHS) {
return LHS.Value != RHS.Value;
}
friend std::ostream &operator<<(std::ostream &Os, const BooleanLattice &B) {
Os << B.Value;
return Os;
}
bool value() const { return Value; }
private:
bool Value;
};
} // namespace
static constexpr int Key1 = 0;
static constexpr int Key2 = 1;
namespace {
using ::testing::Pair;
using ::testing::UnorderedElementsAre;
TEST(MapLatticeTest, InsertWorks) {
MapLattice<int, BooleanLattice> Lattice;
Lattice.insert({Key1, BooleanLattice(false)});
Lattice.insert({Key2, BooleanLattice(false)});
EXPECT_THAT(Lattice, UnorderedElementsAre(Pair(Key1, BooleanLattice(false)),
Pair(Key2, BooleanLattice(false))));
}
TEST(MapLatticeTest, ComparisonWorks) {
MapLattice<int, BooleanLattice> Lattice1;
Lattice1.insert({Key1, BooleanLattice(true)});
Lattice1.insert({Key2, BooleanLattice(false)});
MapLattice<int, BooleanLattice> Lattice2 = Lattice1;
EXPECT_EQ(Lattice1, Lattice2);
Lattice2.find(Key2)->second = BooleanLattice(true);
EXPECT_NE(Lattice1, Lattice2);
}
TEST(MapLatticeTest, JoinChange) {
MapLattice<int, BooleanLattice> Lattice1;
Lattice1.insert({Key1, BooleanLattice(false)});
Lattice1.insert({Key2, BooleanLattice(false)});
MapLattice<int, BooleanLattice> Lattice2;
Lattice2.insert({Key1, BooleanLattice(true)});
Lattice2.insert({Key2, BooleanLattice(true)});
ASSERT_THAT(Lattice1,
UnorderedElementsAre(Pair(Key1, BooleanLattice(false)),
Pair(Key2, BooleanLattice(false))));
ASSERT_EQ(Lattice1.join(Lattice2), LatticeJoinEffect::Changed);
EXPECT_THAT(Lattice1, UnorderedElementsAre(Pair(Key1, BooleanLattice(true)),
Pair(Key2, BooleanLattice(true))));
}
TEST(MapLatticeTest, JoinEqNoChange) {
MapLattice<int, BooleanLattice> Lattice;
Lattice.insert({Key1, BooleanLattice(false)});
Lattice.insert({Key2, BooleanLattice(false)});
ASSERT_EQ(Lattice.join(Lattice), LatticeJoinEffect::Unchanged);
EXPECT_THAT(Lattice, UnorderedElementsAre(Pair(Key1, BooleanLattice(false)),
Pair(Key2, BooleanLattice(false))));
}
TEST(MapLatticeTest, JoinLtNoChange) {
MapLattice<int, BooleanLattice> Lattice1;
Lattice1.insert({Key1, BooleanLattice(false)});
Lattice1.insert({Key2, BooleanLattice(false)});
MapLattice<int, BooleanLattice> Lattice2;
Lattice2.insert({Key1, BooleanLattice(true)});
Lattice2.insert({Key2, BooleanLattice(true)});
ASSERT_THAT(Lattice1,
UnorderedElementsAre(Pair(Key1, BooleanLattice(false)),
Pair(Key2, BooleanLattice(false))));
ASSERT_THAT(Lattice2, UnorderedElementsAre(Pair(Key1, BooleanLattice(true)),
Pair(Key2, BooleanLattice(true))));
ASSERT_EQ(Lattice2.join(Lattice1), LatticeJoinEffect::Unchanged);
EXPECT_THAT(Lattice2, UnorderedElementsAre(Pair(Key1, BooleanLattice(true)),
Pair(Key2, BooleanLattice(true))));
}
TEST(MapLatticeTest, JoinDifferentDomainsProducesUnion) {
MapLattice<int, BooleanLattice> Lattice1;
Lattice1.insert({Key1, BooleanLattice(true)});
MapLattice<int, BooleanLattice> Lattice2;
Lattice2.insert({Key2, BooleanLattice(true)});
ASSERT_EQ(Lattice1.join(Lattice2), LatticeJoinEffect::Changed);
EXPECT_THAT(Lattice1, UnorderedElementsAre(Pair(Key1, BooleanLattice(true)),
Pair(Key2, BooleanLattice(true))));
}
TEST(MapLatticeTest, FindWorks) {
MapLattice<int, BooleanLattice> Lattice;
Lattice.insert({Key1, BooleanLattice(true)});
Lattice.insert({Key2, BooleanLattice(false)});
auto It = Lattice.find(Key1);
ASSERT_NE(It, Lattice.end());
EXPECT_EQ(It->second, BooleanLattice(true));
It = Lattice.find(Key2);
ASSERT_NE(It, Lattice.end());
EXPECT_EQ(It->second, BooleanLattice(false));
}
TEST(MapLatticeTest, ContainsWorks) {
MapLattice<int, BooleanLattice> Lattice;
Lattice.insert({Key1, BooleanLattice(true)});
EXPECT_TRUE(Lattice.contains(Key1));
EXPECT_FALSE(Lattice.contains(Key2));
}
} // namespace
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