[llvm] [KnownFPClass] Add support for non-intrinsic math libcalls (PR #216234)

[Matt Arsenault via llvm-commits]

================
@@ -2380,6 +2381,82 @@ TEST_F(ComputeKnownFPClassTest, SqrtNszSignBit) {
   }
 }
 
+TEST_F(ComputeKnownFPClassTest, CbrtLibCall) {
+  parseAssembly(R"(
----------------
arsenm wrote:

Not sure why you need a unit test

https://github.com/llvm/llvm-project/pull/216234