[llvm] Reland "[NewPM][CodeGen] Port selection dag isel to new pass manager" (PR #94149)

[Andrey Portnoy via llvm-commits]

================
@@ -804,8 +924,8 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
                    << "'\n";
             CurDAG->dump());
 
-#ifndef NDEBUG
-  if (TTI.hasBranchDivergence())
+#if LLVM_ENABLE_ABI_BREAKING_CHECKS
+  if (TTI->hasBranchDivergence())
     CurDAG->VerifyDAGDivergence();
----------------
andportnoy wrote:

How can this line compile when `NDEBUG` is defined, if the declaration of `VerifyDAGDivergence` is guarded by `#ifndef NDEBUG`?
https://github.com/llvm/llvm-project/blob/9c697b3a02d95b49e11633c45f76f77954fca704/llvm/include/llvm/CodeGen/SelectionDAG.h#L587-L589

https://github.com/llvm/llvm-project/pull/94149