Add a C++11 ThreadPool implementation in LLVM

[oota-llvm.git] / unittests / Support / Casting.cpp

diff --git a/unittests/Support/Casting.cpp b/unittests/Support/Casting.cpp
index 01583e43e29b472ff2dfb4cd35737b9f1449a507..e6c35fc21eb7dffc732ed42d9fe511483cd9a97b 100644 (file)
--- a/unittests/Support/Casting.cpp
+++ b/unittests/Support/Casting.cpp
@@ -8,12 +8,17 @@
 //===----------------------------------------------------------------------===//
 
 #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 {
+// Used to test illegal cast. If a cast doesn't match any of the "real" ones,
+// it will match this one.
+struct IllegalCast;
+template <typename T> IllegalCast *cast(...) { return nullptr; }
 
 // set up two example classes
 // with conversion facility
@@ -60,13 +65,32 @@ foo *bar::naz() {
 
 
 bar *fub();
+
+template <> struct simplify_type<foo> {
+  typedef int SimpleType;
+  static SimpleType getSimplifiedValue(foo &Val) { return 0; }
+};
+
 } // End llvm namespace
 
 using namespace llvm;
 
+
+// Test the peculiar behavior of Use in simplify_type.
+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!");
+
+// Test that a regular class behaves as expected.
+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 = NULL;
+const foo *null_foo = nullptr;
 
 bar B;
 extern bar &B1;
@@ -151,7 +175,7 @@ TEST(CastingTest, dyn_cast_or_null) {
 const bar *B2 = &B;
 }  // anonymous namespace
 
-bar *llvm::fub() { return 0; }
+bar *llvm::fub() { return nullptr; }
 
 namespace {
 namespace inferred_upcasting {
@@ -179,7 +203,7 @@ TEST(CastingTest, UpcastIsInferred) {
   Derived D;
   EXPECT_TRUE(isa<Base>(D));
   Base *BP = dyn_cast<Base>(&D);
-  EXPECT_TRUE(BP != NULL);
+  EXPECT_TRUE(BP != nullptr);
 }
 
 
@@ -203,3 +227,104 @@ TEST(CastingTest, InferredUpcastTakesPrecedence) {
 
 } // end namespace inferred_upcasting
 } // end anonymous namespace
+// Test that we reject casts of temporaries (and so the illegal cast gets used).
+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; }
+};
+
+} // end namespace pointer_wrappers
+} // end namespace
+
+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();
+  }
+};
+
+} // end namespace llvm
+
+namespace {
+namespace pointer_wrappers {
+
+// Some objects.
+pointer_wrappers::Base B;
+pointer_wrappers::Derived D;
+
+// Mutable "smart" pointers.
+pointer_wrappers::PTy MN(nullptr);
+pointer_wrappers::PTy MB(&B);
+pointer_wrappers::PTy MD(&D);
+
+// Const "smart" pointers.
+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);
+}
+
+} // end namespace pointer_wrappers
+} // end namespace