[llvm] [IRCE] Check loop clone legality before attempting to do so (PR #151062)

[Keno Fischer via llvm-commits]

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@@ -3358,19 +3358,10 @@ static bool collectUnswitchCandidatesWithInjections(
   return Found;
 }
 
-static bool isSafeForNoNTrivialUnswitching(Loop &L, LoopInfo &LI) {
-  if (!L.isSafeToClone())
+static bool isSafeForNoNTrivialUnswitching(const DominatorTree &DT, Loop &L,
+                                           LoopInfo &LI) {
+  if (!L.isSafeToCloneConditionally(DT))
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Keno wrote:

Split as requested

https://github.com/llvm/llvm-project/pull/151062