[ADT] Add an abstraction for embedding an integer within a pointer-like

[oota-llvm.git] / unittests / ADT / PointerEmbeddedIntTest.cpp

diff --git a/unittests/ADT/PointerEmbeddedIntTest.cpp b/unittests/ADT/PointerEmbeddedIntTest.cpp
new file mode 100644 (file)
index 0000000..b10365a
--- /dev/null
+++ b/unittests/ADT/PointerEmbeddedIntTest.cpp
@@ -0,0 +1,46 @@
+//===- llvm/unittest/ADT/PointerEmbeddedIntTest.cpp -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+#include "llvm/ADT/PointerEmbeddedInt.h"
+using namespace llvm;
+
+namespace {
+
+TEST(PointerEmbeddedIntTest, Basic) {
+  PointerEmbeddedInt<int, CHAR_BIT> I = 42, J = 43;
+
+  EXPECT_EQ(42, I);
+  EXPECT_EQ(43, I + 1);
+  EXPECT_EQ(sizeof(uintptr_t) * CHAR_BIT - CHAR_BIT,
+            PointerLikeTypeTraits<decltype(I)>::NumLowBitsAvailable);
+
+  EXPECT_FALSE(I == J);
+  EXPECT_TRUE(I != J);
+  EXPECT_TRUE(I < J);
+  EXPECT_FALSE(I > J);
+  EXPECT_TRUE(I <= J);
+  EXPECT_FALSE(I >= J);
+
+  EXPECT_FALSE(I == 43);
+  EXPECT_TRUE(I != 43);
+  EXPECT_TRUE(I < 43);
+  EXPECT_FALSE(I > 43);
+  EXPECT_TRUE(I <= 43);
+  EXPECT_FALSE(I >= 43);
+
+  EXPECT_FALSE(42 == J);
+  EXPECT_TRUE(42 != J);
+  EXPECT_TRUE(42 < J);
+  EXPECT_FALSE(42 > J);
+  EXPECT_TRUE(42 <= J);
+  EXPECT_FALSE(42 >= J);
+}
+
+} // end anonymous namespace