llvm/unittests/ADT/PointerEmbeddedIntTest.cpp

   1 //===- llvm/unittest/ADT/PointerEmbeddedIntTest.cpp -----------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/ADT/PointerEmbeddedInt.h"
  10 #include "gtest/gtest.h"
  11 using namespace llvm;
  12
  13 namespace {
  14
  15 TEST(PointerEmbeddedIntTest, Basic) {
  16   PointerEmbeddedInt<int, CHAR_BIT> I = 42, J = 43;
  17
  18   EXPECT_EQ(42, I);
  19   EXPECT_EQ(43, I + 1);
  20   EXPECT_EQ((int)sizeof(uintptr_t) * CHAR_BIT - CHAR_BIT,
  21             (int)PointerLikeTypeTraits<decltype(I)>::NumLowBitsAvailable);
  22
  23   EXPECT_FALSE(I == J);
  24   EXPECT_TRUE(I != J);
  25   EXPECT_TRUE(I < J);
  26   EXPECT_FALSE(I > J);
  27   EXPECT_TRUE(I <= J);
  28   EXPECT_FALSE(I >= J);
  29
  30   EXPECT_FALSE(I == 43);
  31   EXPECT_TRUE(I != 43);
  32   EXPECT_TRUE(I < 43);
  33   EXPECT_FALSE(I > 43);
  34   EXPECT_TRUE(I <= 43);
  35   EXPECT_FALSE(I >= 43);
  36
  37   EXPECT_FALSE(42 == J);
  38   EXPECT_TRUE(42 != J);
  39   EXPECT_TRUE(42 < J);
  40   EXPECT_FALSE(42 > J);
  41   EXPECT_TRUE(42 <= J);
  42   EXPECT_FALSE(42 >= J);
  43 }
  44
  45 TEST(PointerEmbeddedIntTest, intptr_t) {
  46   PointerEmbeddedInt<intptr_t, CHAR_BIT> IPos = 42, INeg = -42;
  47   EXPECT_EQ(42, IPos);
  48   EXPECT_EQ(-42, INeg);
  49
  50   PointerEmbeddedInt<uintptr_t, CHAR_BIT> U = 42, USaturated = 255;
  51   EXPECT_EQ(42U, U);
  52   EXPECT_EQ(255U, USaturated);
  53
  54   PointerEmbeddedInt<intptr_t, std::numeric_limits<intptr_t>::digits>
  55       IMax = std::numeric_limits<intptr_t>::max() >> 1,
  56       IMin = std::numeric_limits<intptr_t>::min() >> 1;
  57   EXPECT_EQ(std::numeric_limits<intptr_t>::max() >> 1, IMax);
  58   EXPECT_EQ(std::numeric_limits<intptr_t>::min() >> 1, IMin);
  59
  60   PointerEmbeddedInt<uintptr_t, std::numeric_limits<uintptr_t>::digits - 1>
  61       UMax = std::numeric_limits<uintptr_t>::max() >> 1,
  62       UMin = std::numeric_limits<uintptr_t>::min() >> 1;
  63   EXPECT_EQ(std::numeric_limits<uintptr_t>::max() >> 1, UMax);
  64   EXPECT_EQ(std::numeric_limits<uintptr_t>::min() >> 1, UMin);
  65 }
  66
  67 TEST(PointerEmbeddedIntTest, PointerLikeTypeTraits) {
  68   PointerEmbeddedInt<int, CHAR_BIT> I = 42;
  69   using ITraits = PointerLikeTypeTraits<decltype(I)>;
  70   EXPECT_EQ(42, ITraits::getFromVoidPointer(ITraits::getAsVoidPointer(I)));
  71
  72   PointerEmbeddedInt<uintptr_t, std::numeric_limits<uintptr_t>::digits - 1>
  73       Max = std::numeric_limits<uintptr_t>::max() >> 1;
  74   using MaxTraits = PointerLikeTypeTraits<decltype(Max)>;
  75   EXPECT_EQ(std::numeric_limits<uintptr_t>::max() >> 1,
  76             MaxTraits::getFromVoidPointer(MaxTraits::getAsVoidPointer(Max)));
  77 }
  78
  79 } // end anonymous namespace