[llvm] [SandboxVec][NFC] Add LLVM_DEBUG dumps (PR #129335)

[via llvm-commits]

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@@ -220,11 +211,8 @@ LegalityAnalysis::getHowToCollectValues(ArrayRef<Value *> Bndl) const {
 const LegalityResult &LegalityAnalysis::canVectorize(ArrayRef<Value *> Bndl,
                                                      bool SkipScheduling) {
   // If Bndl contains values other than instructions, we need to Pack.
-  if (any_of(Bndl, [](auto *V) { return !isa<Instruction>(V); })) {
-    LLVM_DEBUG(dbgs() << "Not vectorizing: Not Instructions:\n";
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vporpo wrote:

This is no longer needed because I am now dumping all legality outcomes at the call site of of `canVectorize()` here: BottomUpVec.cpp:289.

https://github.com/llvm/llvm-project/pull/129335