#include "llvm/Support/Casting.h"
#include "llvm/IR/User.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "gtest/gtest.h"
#include <cstdlib>
namespace llvm {
struct IllegalCast;
template <typename T> IllegalCast *cast(...) { return nullptr; }
struct bar {
bar() {}
struct foo *baz();
struct foo *caz();
struct foo *daz();
struct foo *naz();
private:
bar(const bar &);
};
struct foo {
void ext() const;
};
template <> struct isa_impl<foo, bar> {
static inline bool doit(const bar &Val) {
dbgs() << "Classof: " << &Val << "\n";
return true;
}
};
foo *bar::baz() {
return cast<foo>(this);
}
foo *bar::caz() {
return cast_or_null<foo>(this);
}
foo *bar::daz() {
return dyn_cast<foo>(this);
}
foo *bar::naz() {
return dyn_cast_or_null<foo>(this);
}
bar *fub();
template <> struct simplify_type<foo> {
typedef int SimpleType;
static SimpleType getSimplifiedValue(foo &Val) { return 0; }
};
}
using namespace llvm;
static_assert(std::is_same<simplify_type<Use>::SimpleType, Value *>::value,
"Use doesn't simplify correctly!");
static_assert(std::is_same<simplify_type<Use *>::SimpleType, Value *>::value,
"Use doesn't simplify correctly!");
static_assert(std::is_same<simplify_type<foo>::SimpleType, int>::value,
"Unexpected simplify_type result!");
static_assert(std::is_same<simplify_type<foo *>::SimpleType, foo *>::value,
"Unexpected simplify_type result!");
namespace {
const foo *null_foo = nullptr;
bar B;
extern bar &B1;
bar &B1 = B;
extern const bar *B2;
const bar &B3 = B1;
const bar *const B4 = B2;
TEST(CastingTest, isa) {
EXPECT_TRUE(isa<foo>(B1));
EXPECT_TRUE(isa<foo>(B2));
EXPECT_TRUE(isa<foo>(B3));
EXPECT_TRUE(isa<foo>(B4));
}
TEST(CastingTest, cast) {
foo &F1 = cast<foo>(B1);
EXPECT_NE(&F1, null_foo);
const foo *F3 = cast<foo>(B2);
EXPECT_NE(F3, null_foo);
const foo *F4 = cast<foo>(B2);
EXPECT_NE(F4, null_foo);
const foo &F5 = cast<foo>(B3);
EXPECT_NE(&F5, null_foo);
const foo *F6 = cast<foo>(B4);
EXPECT_NE(F6, null_foo);
foo *F8 = B1.baz();
EXPECT_NE(F8, null_foo);
}
TEST(CastingTest, cast_or_null) {
const foo *F11 = cast_or_null<foo>(B2);
EXPECT_NE(F11, null_foo);
const foo *F12 = cast_or_null<foo>(B2);
EXPECT_NE(F12, null_foo);
const foo *F13 = cast_or_null<foo>(B4);
EXPECT_NE(F13, null_foo);
const foo *F14 = cast_or_null<foo>(fub()); EXPECT_EQ(F14, null_foo);
foo *F15 = B1.caz();
EXPECT_NE(F15, null_foo);
}
TEST(CastingTest, dyn_cast) {
const foo *F1 = dyn_cast<foo>(B2);
EXPECT_NE(F1, null_foo);
const foo *F2 = dyn_cast<foo>(B2);
EXPECT_NE(F2, null_foo);
const foo *F3 = dyn_cast<foo>(B4);
EXPECT_NE(F3, null_foo);
foo *F5 = B1.daz();
EXPECT_NE(F5, null_foo);
}
TEST(CastingTest, dyn_cast_or_null) {
const foo *F1 = dyn_cast_or_null<foo>(B2);
EXPECT_NE(F1, null_foo);
const foo *F2 = dyn_cast_or_null<foo>(B2);
EXPECT_NE(F2, null_foo);
const foo *F3 = dyn_cast_or_null<foo>(B4);
EXPECT_NE(F3, null_foo);
foo *F4 = dyn_cast_or_null<foo>(fub());
EXPECT_EQ(F4, null_foo);
foo *F5 = B1.naz();
EXPECT_NE(F5, null_foo);
}
const bar *B2 = &B;
}
bar *llvm::fub() { return nullptr; }
namespace {
namespace inferred_upcasting {
class Base {
public:
Base() {}
};
class Derived : public Base {
public:
Derived() {}
};
TEST(CastingTest, UpcastIsInferred) {
Derived D;
EXPECT_TRUE(isa<Base>(D));
Base *BP = dyn_cast<Base>(&D);
EXPECT_TRUE(BP != nullptr);
}
class UseInferredUpcast {
public:
int Dummy;
static bool classof(const UseInferredUpcast *) {
return false;
}
};
TEST(CastingTest, InferredUpcastTakesPrecedence) {
UseInferredUpcast UIU;
EXPECT_TRUE(isa<UseInferredUpcast>(&UIU));
}
} } namespace TemporaryCast {
struct pod {};
IllegalCast *testIllegalCast() { return cast<foo>(pod()); }
}
namespace {
namespace pointer_wrappers {
struct Base {
bool IsDerived;
Base(bool IsDerived = false) : IsDerived(IsDerived) {}
};
struct Derived : Base {
Derived() : Base(true) {}
static bool classof(const Base *B) { return B->IsDerived; }
};
class PTy {
Base *B;
public:
PTy(Base *B) : B(B) {}
explicit operator bool() const { return get(); }
Base *get() const { return B; }
};
} }
namespace llvm {
template <> struct simplify_type<pointer_wrappers::PTy> {
typedef pointer_wrappers::Base *SimpleType;
static SimpleType getSimplifiedValue(pointer_wrappers::PTy &P) {
return P.get();
}
};
template <> struct simplify_type<const pointer_wrappers::PTy> {
typedef pointer_wrappers::Base *SimpleType;
static SimpleType getSimplifiedValue(const pointer_wrappers::PTy &P) {
return P.get();
}
};
}
namespace {
namespace pointer_wrappers {
pointer_wrappers::Base B;
pointer_wrappers::Derived D;
pointer_wrappers::PTy MN(nullptr);
pointer_wrappers::PTy MB(&B);
pointer_wrappers::PTy MD(&D);
const pointer_wrappers::PTy CN(nullptr);
const pointer_wrappers::PTy CB(&B);
const pointer_wrappers::PTy CD(&D);
TEST(CastingTest, smart_isa) {
EXPECT_TRUE(!isa<pointer_wrappers::Derived>(MB));
EXPECT_TRUE(!isa<pointer_wrappers::Derived>(CB));
EXPECT_TRUE(isa<pointer_wrappers::Derived>(MD));
EXPECT_TRUE(isa<pointer_wrappers::Derived>(CD));
}
TEST(CastingTest, smart_cast) {
EXPECT_TRUE(cast<pointer_wrappers::Derived>(MD) == &D);
EXPECT_TRUE(cast<pointer_wrappers::Derived>(CD) == &D);
}
TEST(CastingTest, smart_cast_or_null) {
EXPECT_TRUE(cast_or_null<pointer_wrappers::Derived>(MN) == nullptr);
EXPECT_TRUE(cast_or_null<pointer_wrappers::Derived>(CN) == nullptr);
EXPECT_TRUE(cast_or_null<pointer_wrappers::Derived>(MD) == &D);
EXPECT_TRUE(cast_or_null<pointer_wrappers::Derived>(CD) == &D);
}
TEST(CastingTest, smart_dyn_cast) {
EXPECT_TRUE(dyn_cast<pointer_wrappers::Derived>(MB) == nullptr);
EXPECT_TRUE(dyn_cast<pointer_wrappers::Derived>(CB) == nullptr);
EXPECT_TRUE(dyn_cast<pointer_wrappers::Derived>(MD) == &D);
EXPECT_TRUE(dyn_cast<pointer_wrappers::Derived>(CD) == &D);
}
TEST(CastingTest, smart_dyn_cast_or_null) {
EXPECT_TRUE(dyn_cast_or_null<pointer_wrappers::Derived>(MN) == nullptr);
EXPECT_TRUE(dyn_cast_or_null<pointer_wrappers::Derived>(CN) == nullptr);
EXPECT_TRUE(dyn_cast_or_null<pointer_wrappers::Derived>(MB) == nullptr);
EXPECT_TRUE(dyn_cast_or_null<pointer_wrappers::Derived>(CB) == nullptr);
EXPECT_TRUE(dyn_cast_or_null<pointer_wrappers::Derived>(MD) == &D);
EXPECT_TRUE(dyn_cast_or_null<pointer_wrappers::Derived>(CD) == &D);
}
} }