[BPF] Set minimum switch cases to be 13

To adjust, add '-mllvm -bpf-min-jump-table-entries=<n>' to the
compilation flags.

Author: Yonghong Song

llvm/lib/Target/BPF/BPFISelLowering.cpp

@@ -40,7 +40,7 @@ static cl::opt<bool> BPFExpandMemcpyInOrder("bpf-expand-memcpy-in-order",
   cl::desc("Expand memcpy into load/store pairs in order"));
 
 static cl::opt<unsigned> BPFMinimumJumpTableEntries(
-    "bpf-min-jump-table-entries", cl::init(5), cl::Hidden,
+    "bpf-min-jump-table-entries", cl::init(13), cl::Hidden,
     cl::desc("Set minimum number of entries to use a jump table on BPF"));
 
 static void fail(const SDLoc &DL, SelectionDAG &DAG, const Twine &Msg,