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-rw-r--r--llvm/unittests/ADT/BitTest.cpp38
1 files changed, 38 insertions, 0 deletions
diff --git a/llvm/unittests/ADT/BitTest.cpp b/llvm/unittests/ADT/BitTest.cpp
index eaed4e1..e8041bb 100644
--- a/llvm/unittests/ADT/BitTest.cpp
+++ b/llvm/unittests/ADT/BitTest.cpp
@@ -270,6 +270,44 @@ TEST(BitTest, BitWidthConstexpr) {
llvm::bit_width_constexpr(std::numeric_limits<uint64_t>::max()) == 64);
}
+TEST(BitTest, BitCeilConstexpr) {
+ static_assert(llvm::bit_ceil_constexpr(0u) == 1);
+ static_assert(llvm::bit_ceil_constexpr(1u) == 1);
+ static_assert(llvm::bit_ceil_constexpr(2u) == 2);
+ static_assert(llvm::bit_ceil_constexpr(3u) == 4);
+ static_assert(llvm::bit_ceil_constexpr(4u) == 4);
+ static_assert(llvm::bit_ceil_constexpr(5u) == 8);
+ static_assert(llvm::bit_ceil_constexpr(6u) == 8);
+ static_assert(llvm::bit_ceil_constexpr(7u) == 8);
+ static_assert(llvm::bit_ceil_constexpr(8u) == 8);
+
+ static_assert(llvm::bit_ceil_constexpr(255u) == 256);
+ static_assert(llvm::bit_ceil_constexpr(256u) == 256);
+ static_assert(llvm::bit_ceil_constexpr(257u) == 512);
+}
+
+TEST(BitTest, CountrZeroConstexpr) {
+ static_assert(llvm::countr_zero_constexpr(0u) == 32);
+ static_assert(llvm::countr_zero_constexpr(1u) == 0);
+ static_assert(llvm::countr_zero_constexpr(2u) == 1);
+ static_assert(llvm::countr_zero_constexpr(3u) == 0);
+ static_assert(llvm::countr_zero_constexpr(4u) == 2);
+ static_assert(llvm::countr_zero_constexpr(8u) == 3);
+ static_assert(llvm::countr_zero_constexpr(0x80000000u) == 31);
+
+ static_assert(llvm::countr_zero_constexpr(0ull) == 64);
+ static_assert(llvm::countr_zero_constexpr(1ull) == 0);
+ static_assert(llvm::countr_zero_constexpr(0x100000000ull) == 32);
+ static_assert(llvm::countr_zero_constexpr(0x8000000000000000ull) == 63);
+
+ static_assert(
+ llvm::countr_zero_constexpr(std::numeric_limits<uint16_t>::max()) == 0);
+ static_assert(
+ llvm::countr_zero_constexpr(std::numeric_limits<uint32_t>::max()) == 0);
+ static_assert(
+ llvm::countr_zero_constexpr(std::numeric_limits<uint64_t>::max()) == 0);
+}
+
TEST(BitTest, CountlZero) {
uint8_t Z8 = 0;
uint16_t Z16 = 0;