[ADT/MathExtras] Introduce PowerOf2Ceil.
To be used in lld (and probably somewhere else in llvm).
Differential Revision: https://reviews.llvm.org/D26538
llvm-svn: 286549
diff --git a/llvm/unittests/Support/MathExtrasTest.cpp b/llvm/unittests/Support/MathExtrasTest.cpp
index d373030..c8c4950 100644
--- a/llvm/unittests/Support/MathExtrasTest.cpp
+++ b/llvm/unittests/Support/MathExtrasTest.cpp
@@ -165,6 +165,12 @@
EXPECT_FALSE(isPowerOf2_64(0xABCDEF0ABCDEF0LL));
}
+TEST(MathExtras, PowerOf2Ceil) {
+ EXPECT_EQ(0, PowerOf2Ceil(0));
+ EXPECT_EQ(8, PowerOf2Ceil(8));
+ EXPECT_EQ(8, PowerOf2Ceil(7));
+}
+
TEST(MathExtras, ByteSwap_32) {
EXPECT_EQ(0x44332211u, ByteSwap_32(0x11223344));
EXPECT_EQ(0xDDCCBBAAu, ByteSwap_32(0xAABBCCDD));