[llvm] [LoopVersioning] Add a check to see if the input loop is in LCSSA form (PR #116443)

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``````````bash
git-clang-format --diff e887f8290df419ffd4e018b6f8afbaeb1912cf0e 682c55730cabf6e7c315fdece6940635e3568b53 --extensions cpp -- llvm/lib/Transforms/Utils/LoopVersioning.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Utils/LoopVersioning.cpp b/llvm/lib/Transforms/Utils/LoopVersioning.cpp
index 5ee551e6f0..94594e18c2 100644
--- a/llvm/lib/Transforms/Utils/LoopVersioning.cpp
+++ b/llvm/lib/Transforms/Utils/LoopVersioning.cpp
@@ -280,7 +280,7 @@ bool runImpl(LoopInfo *LI, LoopAccessInfoManager &LAIs, DominatorTree *DT,
         (LAI.getNumRuntimePointerChecks() ||
          !LAI.getPSE().getPredicate().isAlwaysTrue())) {
       if (!L->isLCSSAForm(*DT))
-       formLCSSARecursively(*L, *DT, LI, SE);
+        formLCSSARecursively(*L, *DT, LI, SE);
 
       LoopVersioning LVer(LAI, LAI.getRuntimePointerChecking()->getChecks(), L,
                           LI, DT, SE);

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https://github.com/llvm/llvm-project/pull/116443