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author | Stephen Hines <srhines@google.com> | 2014-04-23 16:57:46 -0700 |
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committer | Stephen Hines <srhines@google.com> | 2014-04-24 15:53:16 -0700 |
commit | 36b56886974eae4f9c5ebc96befd3e7bfe5de338 (patch) | |
tree | e6cfb69fbbd937f450eeb83bfb83b9da3b01275a /unittests/ADT/PointerIntPairTest.cpp | |
parent | 69a8640022b04415ae9fac62f8ab090601d8f889 (diff) | |
download | external_llvm-36b56886974eae4f9c5ebc96befd3e7bfe5de338.zip external_llvm-36b56886974eae4f9c5ebc96befd3e7bfe5de338.tar.gz external_llvm-36b56886974eae4f9c5ebc96befd3e7bfe5de338.tar.bz2 |
Update to LLVM 3.5a.
Change-Id: Ifadecab779f128e62e430c2b4f6ddd84953ed617
Diffstat (limited to 'unittests/ADT/PointerIntPairTest.cpp')
-rw-r--r-- | unittests/ADT/PointerIntPairTest.cpp | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/unittests/ADT/PointerIntPairTest.cpp b/unittests/ADT/PointerIntPairTest.cpp new file mode 100644 index 0000000..296d475 --- /dev/null +++ b/unittests/ADT/PointerIntPairTest.cpp @@ -0,0 +1,76 @@ +//===- llvm/unittest/ADT/PointerIntPairTest.cpp - Unit tests --------------===// +// +// 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/PointerIntPair.h" +#include <limits> +using namespace llvm; + +namespace { + +// Test fixture +class PointerIntPairTest : public testing::Test { +}; + +TEST_F(PointerIntPairTest, GetSet) { + PointerIntPair<PointerIntPairTest *, 2> Pair(this, 1U); + EXPECT_EQ(this, Pair.getPointer()); + EXPECT_EQ(1U, Pair.getInt()); + + Pair.setInt(2); + EXPECT_EQ(this, Pair.getPointer()); + EXPECT_EQ(2U, Pair.getInt()); + + Pair.setPointer(nullptr); + EXPECT_EQ(nullptr, Pair.getPointer()); + EXPECT_EQ(2U, Pair.getInt()); + + Pair.setPointerAndInt(this, 3U); + EXPECT_EQ(this, Pair.getPointer()); + EXPECT_EQ(3U, Pair.getInt()); +} + +TEST_F(PointerIntPairTest, DefaultInitialize) { + PointerIntPair<PointerIntPairTest *, 2> Pair; + EXPECT_EQ(nullptr, Pair.getPointer()); + EXPECT_EQ(0U, Pair.getInt()); +} + +#if !(defined(_MSC_VER) && _MSC_VER==1700) +TEST_F(PointerIntPairTest, ManyUnusedBits) { + // In real code this would be a word-sized integer limited to 31 bits. + struct Fixnum31 { + uintptr_t Value; + }; + class FixnumPointerTraits { + public: + static inline void *getAsVoidPointer(Fixnum31 Num) { + return reinterpret_cast<void *>(Num.Value << NumLowBitsAvailable); + } + static inline Fixnum31 getFromVoidPointer(void *P) { + // In real code this would assert that the value is in range. + return { reinterpret_cast<uintptr_t>(P) >> NumLowBitsAvailable }; + } + enum { NumLowBitsAvailable = std::numeric_limits<uintptr_t>::digits - 31 }; + }; + + PointerIntPair<Fixnum31, 1, bool, FixnumPointerTraits> pair; + EXPECT_EQ((uintptr_t)0, pair.getPointer().Value); + EXPECT_FALSE(pair.getInt()); + + pair.setPointerAndInt({ 0x7FFFFFFF }, true ); + EXPECT_EQ((uintptr_t)0x7FFFFFFF, pair.getPointer().Value); + EXPECT_TRUE(pair.getInt()); + + EXPECT_EQ(FixnumPointerTraits::NumLowBitsAvailable - 1, + PointerLikeTypeTraits<decltype(pair)>::NumLowBitsAvailable); +} +#endif + +} // end anonymous namespace |