[VPlan] Format some print forms.NFC (llvm#144644)

Author: LiqinWeng

llvm/lib/Transforms/Vectorize/VPlan.cpp

@@ -465,7 +465,7 @@ void VPBasicBlock::connectToPredecessors(VPTransformState &State) {
            "Predecessor basic-block not found building successor.");
     BasicBlock *PredBB = CFG.VPBB2IRBB[PredVPBB];
     auto *PredBBTerminator = PredBB->getTerminator();
-    LLVM_DEBUG(dbgs() << "LV: draw edge from" << PredBB->getName() << '\n');
+    LLVM_DEBUG(dbgs() << "LV: draw edge from " << PredBB->getName() << '\n');
 
     auto *TermBr = dyn_cast<BranchInst>(PredBBTerminator);
     if (isa<UnreachableInst>(PredBBTerminator)) {
@@ -579,8 +579,8 @@ VPBasicBlock *VPBasicBlock::clone() {
 }
 
 void VPBasicBlock::executeRecipes(VPTransformState *State, BasicBlock *BB) {
-  LLVM_DEBUG(dbgs() << "LV: vectorizing VPBB:" << getName()
-                    << " in BB:" << BB->getName() << '\n');
+  LLVM_DEBUG(dbgs() << "LV: vectorizing VPBB: " << getName()
+                    << " in BB: " << BB->getName() << '\n');
 
   State->CFG.PrevVPBB = this;
 
@@ -589,7 +589,7 @@ void VPBasicBlock::executeRecipes(VPTransformState *State, BasicBlock *BB) {
     Recipe.execute(*State);
   }
 
-  LLVM_DEBUG(dbgs() << "LV: filled BB:" << *BB);
+  LLVM_DEBUG(dbgs() << "LV: filled BB: " << *BB);
 }
 
 VPBasicBlock *VPBasicBlock::splitAt(iterator SplitAt) {