1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp b/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
index fb5b08df5d3..9f5f40c8b5b 100644
--- a/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
@@ -893,6 +893,11 @@ void ARMTTIImpl::getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
         }
         return;
       }
+      // Don't unroll vectorised loop. MVE does not benefit from it as much as
+      // scalar code.
+      if (I.getType()->isVectorTy())
+        return;
+
       SmallVector<const Value*, 4> Operands(I.value_op_begin(),
                                             I.value_op_end());
       Cost += getUserCost(&I, Operands);