Implementation for `TargetTransformInfo::hasActiveVectorLength()`

[vkmr]

Summary

This patch adds the missing implementation for TargetTransformInfo::hasActiveVectorLength() without which using hasActiveVectorLength() causes linker error.

[rogfer01]

@vkmr do you have commit rights? I can commit this for you.

[vkmr]

In D100941#2716539, @rogfer01 wrote:

@vkmr do you have commit rights? I can commit this for you.

@rogfer01 I don't. I will really appreciate if you can commit this for me.

llvm/lib/Analysis/TargetTransformInfo.cpp

 unsigned TargetTransformInfo::getGISelRematGlobalCost() const {
   return TTIImpl->getGISelRematGlobalCost();
 }
 
 bool TargetTransformInfo::supportsScalableVectors() const {
   return TTIImpl->supportsScalableVectors();
 }
 
+bool TargetTransformInfo::hasActiveVectorLength() const {
+  return TTIImpl->hasActiveVectorLength();
+}
+
 InstructionCost
 TargetTransformInfo::getInstructionLatency(const Instruction *I) const {
   return TTIImpl->getInstructionLatency(I);
 }
 
 static bool matchPairwiseShuffleMask(ShuffleVectorInst *SI, bool IsLeft,
                                      unsigned Level) {
   // We don't need a shuffle if we just want to have element 0 in position 0 of