[Support] Add isShiftedMask_32/isShiftedMask_64 unit test coverage

diff --git a/llvm/unittests/Support/MathExtrasTest.cpp b/llvm/unittests/Support/MathExtrasTest.cpp
index 6088fdc..cf055c6 100644 (file)
--- a/llvm/unittests/Support/MathExtrasTest.cpp
+++ b/llvm/unittests/Support/MathExtrasTest.cpp
@@ -175,6 +175,20 @@ TEST(MathExtras, reverseBits) {
   EXPECT_EQ(0x5400000000000000ULL, reverseBits(NZ64));
 }
 
+TEST(MathExtras, isShiftedMask_32) {
+  EXPECT_FALSE(isShiftedMask_32(0x01010101));
+  EXPECT_TRUE(isShiftedMask_32(0xf0000000));
+  EXPECT_TRUE(isShiftedMask_32(0xffff0000));
+  EXPECT_TRUE(isShiftedMask_32(0xff << 1));
+}
+
+TEST(MathExtras, isShiftedMask_64) {
+  EXPECT_FALSE(isShiftedMask_64(0x0101010101010101ull));
+  EXPECT_TRUE(isShiftedMask_64(0xf000000000000000ull));
+  EXPECT_TRUE(isShiftedMask_64(0xffff000000000000ull));
+  EXPECT_TRUE(isShiftedMask_64(0xffull << 55));
+}
+
 TEST(MathExtras, isPowerOf2_32) {
   EXPECT_FALSE(isPowerOf2_32(0));
   EXPECT_TRUE(isPowerOf2_32(1 << 6));