[VPlan] Fix error in comment (NFC)

Author: artagnon

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -7572,7 +7572,7 @@ createWidenInductionRecipes(PHINode *Phi, Instruction *PhiOrTrunc,
 
   // It is always safe to copy over the NoWrap and FastMath flags. In
   // particular, when folding tail by masking, the masked-off lanes are never
-  // executed, so it is safe.
+  // used, so it is safe.
   VPIRFlags Flags = vputils::getFlagsFromIndDesc(IndDesc);
   VPValue *Step =
       vputils::getOrCreateVPValueForSCEVExpr(Plan, IndDesc.getStep());

llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp

@@ -82,7 +82,7 @@ bool VPlanTransforms::tryToConvertVPInstructionsToVPRecipes(
               vputils::getOrCreateVPValueForSCEVExpr(Plan, II->getStep());
           // It is always safe to copy over the NoWrap and FastMath flags. In
           // particular, when folding tail by masking, the masked-off lanes are
-          // never executed, so it is safe.
+          // never used, so it is safe.
           VPIRFlags Flags = vputils::getFlagsFromIndDesc(*II);
           NewRecipe = new VPWidenIntOrFpInductionRecipe(
               Phi, Start, Step, &Plan.getVF(), *II, Flags,