[DSE] Explicitly not use MSSA in testcase for now

It fails for some reason, but it shouldn't stop switching to MSSA in DSE.

Author: Krzysztof Parzyszek

llvm/test/Transforms/DeadStoreElimination/masked-dead-store.ll

@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -tbaa -dse -S < %s | FileCheck %s
+; RUN: opt -tbaa -dse -enable-dse-memoryssa=false -S < %s | FileCheck %s
 target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048"
 
 define dllexport i32 @f0(i8** %a0, i8** %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i32 %a6, i32 %a7) #0 {