[SimpleLoopUnswitch] Pass -verify-cfg-preserved to test.

This ensures PreservedCFGCheckerAnalysis is always added, independent of
whether opt was built with assertions enabled or not.

This fixes a few buildbot failures for bots that don't have assertions
enabled.

diff --git a/llvm/test/Transforms/SimpleLoopUnswitch/nontrivial-unswitch-markloopasdeleted.ll b/llvm/test/Transforms/SimpleLoopUnswitch/nontrivial-unswitch-markloopasdeleted.ll
index 45f568b..b3cc693 100644 (file)
--- a/llvm/test/Transforms/SimpleLoopUnswitch/nontrivial-unswitch-markloopasdeleted.ll
+++ b/llvm/test/Transforms/SimpleLoopUnswitch/nontrivial-unswitch-markloopasdeleted.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -enable-loop-distribute -passes='loop-distribute,loop-mssa(simple-loop-unswitch<nontrivial>),loop-distribute' -o /dev/null -S -debug-pass-manager=verbose 2>&1 | FileCheck %s
+; RUN: opt < %s -enable-loop-distribute -passes='loop-distribute,loop-mssa(simple-loop-unswitch<nontrivial>),loop-distribute' -o /dev/null -S -verify-cfg-preserved -debug-pass-manager=verbose 2>&1 | FileCheck %s
 
 
 ; Running loop-distribute will result in LoopAccessAnalysis being required and