[llvm] Hexagon QFP Optimizer (PR #163843)

[Brian Cain via llvm-commits]

================
@@ -386,6 +387,7 @@ bool HexagonPassConfig::addInstSelector() {
       addPass(createHexagonGenInsert());
     if (EnableEarlyIf)
       addPass(createHexagonEarlyIfConversion());
+    addPass(createHexagonQFPoptimizer());
----------------
androm3da wrote:

I'm not familiar w/ the design of the compiler passes.  After this PR lands, which optimization level(s) will this new pass be active?

https://github.com/llvm/llvm-project/pull/163843