diff options
Diffstat (limited to 'llvm/unittests/ADT/APIntTest.cpp')
| -rw-r--r-- | llvm/unittests/ADT/APIntTest.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/llvm/unittests/ADT/APIntTest.cpp b/llvm/unittests/ADT/APIntTest.cpp index c59e695..4ae7025 100644 --- a/llvm/unittests/ADT/APIntTest.cpp +++ b/llvm/unittests/ADT/APIntTest.cpp @@ -994,6 +994,23 @@ TEST(APIntTest, IsSplat) { EXPECT_TRUE(E.isSplat(32)); } +TEST(APIntTest, isMask) { + EXPECT_FALSE(APIntOps::isMask(APInt(32, 0x01010101))); + EXPECT_FALSE(APIntOps::isMask(APInt(32, 0xf0000000))); + EXPECT_FALSE(APIntOps::isMask(APInt(32, 0xffff0000))); + EXPECT_FALSE(APIntOps::isMask(APInt(32, 0xff << 1))); + + for (int N : { 1, 2, 3, 4, 7, 8, 16, 32, 64, 127, 128, 129, 256 }) { + EXPECT_FALSE(APIntOps::isMask(APInt(N, 0))); + + APInt One(N, 1); + for (int I = 1; I <= N; ++I) { + APInt MaskVal = One.shl(I) - 1; + EXPECT_TRUE(APIntOps::isMask(MaskVal)); + } + } +} + #if defined(__clang__) // Disable the pragma warning from versions of Clang without -Wself-move #pragma clang diagnostic push |