diff --git a/llvm/lib/Analysis/TargetTransformInfo.cpp b/llvm/lib/Analysis/TargetTransformInfo.cpp
--- a/llvm/lib/Analysis/TargetTransformInfo.cpp
+++ b/llvm/lib/Analysis/TargetTransformInfo.cpp
@@ -1038,6 +1038,10 @@
   return TTIImpl->supportsScalableVectors();
 }
 
+bool TargetTransformInfo::hasActiveVectorLength() const {
+  return TTIImpl->hasActiveVectorLength();
+}
+
 InstructionCost
 TargetTransformInfo::getInstructionLatency(const Instruction *I) const {
   return TTIImpl->getInstructionLatency(I);