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

[Florian Hahn via llvm-commits]

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@@ -1519,17 +1521,21 @@ bool LoopVectorizationLegality::canVectorize(bool UseVPlanNativePath) {
       return false;
   }
 
-  LLVM_DEBUG(dbgs() << "LV: We can vectorize this loop"
-                    << (LAI->getRuntimePointerChecking()->Need
-                            ? " (with a runtime bound check)"
-                            : "")
-                    << "!\n");
-
   unsigned SCEVThreshold = VectorizeSCEVCheckThreshold;
   if (Hints->getForce() == LoopVectorizeHints::FK_Enabled)
     SCEVThreshold = PragmaVectorizeSCEVCheckThreshold;
 
+  if (Result) {
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fhahn wrote:

also keep where the message is emitted at the original place, so `SCEVThreshold`'s definition is closer to use?

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