diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
index ff35db14f7094..7d376c370bb1c 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp
@@ -293,9 +293,8 @@ void LoopVectorizeHints::getHintsFromMetadata() {
 }
 
 void LoopVectorizeHints::setHint(StringRef Name, Metadata *Arg) {
-  if (!Name.starts_with(Prefix()))
+  if (!Name.consume_front(Prefix()))
     return;
-  Name = Name.substr(Prefix().size(), StringRef::npos);
 
   const ConstantInt *C = mdconst::dyn_extract<ConstantInt>(Arg);
   if (!C)