diff options
Diffstat (limited to 'llvm/unittests/ADT/BitTest.cpp')
| -rw-r--r-- | llvm/unittests/ADT/BitTest.cpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/unittests/ADT/BitTest.cpp b/llvm/unittests/ADT/BitTest.cpp index 88ae36c..eaed4e1 100644 --- a/llvm/unittests/ADT/BitTest.cpp +++ b/llvm/unittests/ADT/BitTest.cpp @@ -247,6 +247,29 @@ TEST(BitTest, BitWidth) { EXPECT_EQ(64, llvm::bit_width(uint64_t(0xffffffffffffffffull))); } +TEST(BitTest, BitWidthConstexpr) { + static_assert(llvm::bit_width_constexpr(0u) == 0); + static_assert(llvm::bit_width_constexpr(1u) == 1); + static_assert(llvm::bit_width_constexpr(2u) == 2); + static_assert(llvm::bit_width_constexpr(3u) == 2); + static_assert(llvm::bit_width_constexpr(4u) == 3); + static_assert(llvm::bit_width_constexpr(5u) == 3); + static_assert(llvm::bit_width_constexpr(6u) == 3); + static_assert(llvm::bit_width_constexpr(7u) == 3); + static_assert(llvm::bit_width_constexpr(8u) == 4); + + static_assert(llvm::bit_width_constexpr(255u) == 8); + static_assert(llvm::bit_width_constexpr(256u) == 9); + static_assert(llvm::bit_width_constexpr(257u) == 9); + + static_assert( + llvm::bit_width_constexpr(std::numeric_limits<uint16_t>::max()) == 16); + static_assert( + llvm::bit_width_constexpr(std::numeric_limits<uint32_t>::max()) == 32); + static_assert( + llvm::bit_width_constexpr(std::numeric_limits<uint64_t>::max()) == 64); +} + TEST(BitTest, CountlZero) { uint8_t Z8 = 0; uint16_t Z16 = 0; |