Index: lib/Transforms/Vectorize/LoopVectorize.cpp
===================================================================
--- lib/Transforms/Vectorize/LoopVectorize.cpp
+++ lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -7419,6 +7419,9 @@
   DB = &DB_;
   ORE = &ORE_;
 
+  if (F.hasFnAttribute(Attribute::OptForFuzzing))
+    return false;
+
   // Don't attempt if
   // 1. the target claims to have no vector registers, and
   // 2. interleaving won't help ILP.