add new test for showing the default behaviour vs the explicitly specified behaviour

Change-Id: Iaea637e2b3573cd70d0a3d3509049b7cc0cb92c5

Author: hassnaaHamdi

llvm/test/Transforms/LoopVectorize/AArch64/sve-epilog-vect-vscale-tune.ll

@@ -1,9 +1,6 @@
 ; RUN: opt -S -passes=loop-vectorize,instsimplify -force-vector-interleave=1 \
 ; RUN:   -mcpu=neoverse-v1 -sve-tail-folding=disabled < %s | FileCheck %s --check-prefix=CHECK-EPILOG
 ; RUN: opt -S -passes=loop-vectorize,instsimplify -force-vector-interleave=1 \
-; RUN:   -mcpu=neoverse-v1 -sve-tail-folding=disabled -sve-prefer-fixed-over-scalable-if-equal=false \
-; RUN:   < %s | FileCheck %s --check-prefix=CHECK-EPILOG-PREFER-SCALABLE
-; RUN: opt -S -passes=loop-vectorize,instsimplify -force-vector-interleave=1 \
 ; RUN:   -mcpu=neoverse-v2 < %s | FileCheck %s --check-prefix=CHECK-EPILOG-V2
 ; RUN: opt -S -passes=loop-vectorize,instsimplify -force-vector-interleave=1 \
 ; RUN:   -mcpu=cortex-x2 < %s | FileCheck %s --check-prefix=CHECK-NO-EPILOG
@@ -15,10 +12,6 @@ define void @foo(ptr noalias nocapture readonly %p, ptr noalias nocapture %q, i6
 ; CHECK-EPILOG:      vec.epilog.vector.body:
 ; CHECK-EPILOG:        load <8 x i16>
 
-; CHECK-EPILOG-PREFER-SCALABLE:      vec.epilog.ph:
-; CHECK-EPILOG-PREFER-SCALABLE:      vec.epilog.vector.body:
-; CHECK-EPILOG-PREFER-SCALABLE:        load <vscale x 4 x i16>
-
 ; The epilogue loop gets vectorised vscale x 2 x i16 wide.
 ; CHECK-EPILOG-V2:      vec.epilog.ph:
 ; CHECK-EPILOG-V2:      vec.epilog.vector.body: