[llvm] MathExtras/test: increase coverage (PR #95425)

[Ramkumar Ramachandra via llvm-commits]

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@@ -183,15 +185,34 @@ TEST(MathExtras, NextPowerOf2) {
   EXPECT_EQ(256u, NextPowerOf2(128));
 }
 
-TEST(MathExtras, alignTo) {
+TEST(MathExtras, AlignTo) {
   EXPECT_EQ(8u, alignTo(5, 8));
   EXPECT_EQ(24u, alignTo(17, 8));
   EXPECT_EQ(0u, alignTo(~0LL, 8));
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artagnon wrote:

We do, in general, but this particular case is just a simple cast from one integer type to another, preserving signedness, so I don't think it matters.

https://github.com/llvm/llvm-project/pull/95425