[llvm] [LV] Fix emission of debug message in legality check (PR #101924)

[Florian Hahn via llvm-commits]

================
@@ -1451,10 +1451,12 @@ bool LoopVectorizationLegality::canVectorize(bool UseVPlanNativePath) {
   // Check whether the loop-related control flow in the loop nest is expected by
   // vectorizer.
   if (!canVectorizeLoopNestCFG(TheLoop, UseVPlanNativePath)) {
-    if (DoExtraAnalysis)
+    if (DoExtraAnalysis) {
+      LLVM_DEBUG(dbgs() << "LV: legality check failed: loop nest");
----------------
fhahn wrote:

Ok, generally it's preferable to keep things separate if possible. Fine to keep it here in the PR for now though 

https://github.com/llvm/llvm-project/pull/101924