[llvm] [LoopInterchange] Bail out early if minimum loop nest is not met (PR #115128)

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``````````bash
git-clang-format --diff 1715549373ab774bd73de0c982f7f01f30f94720 636cdf1bda4d1f10babc23b7f2c6b415ab527c84 --extensions cpp -- llvm/lib/Transforms/Scalar/LoopInterchange.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Scalar/LoopInterchange.cpp b/llvm/lib/Transforms/Scalar/LoopInterchange.cpp
index 09bd7d8eda..80b6c0132d 100644
--- a/llvm/lib/Transforms/Scalar/LoopInterchange.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopInterchange.cpp
@@ -1722,11 +1722,11 @@ PreservedAnalyses LoopInterchangePass::run(LoopNest &LN,
   Function &F = *LN.getParent();
 
   SmallVector<Loop *, 8> LoopList(LN.getLoops());
-  
+
   // Ensure minimum depth of the loop nest to do the interchange.
   if (!hasMinimumLoopDepth(LoopList))
     return PreservedAnalyses::all();
-  
+
   DependenceInfo DI(&F, &AR.AA, &AR.SE, &AR.LI);
   std::unique_ptr<CacheCost> CC =
       CacheCost::getCacheCost(LN.getOutermostLoop(), AR, DI);

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https://github.com/llvm/llvm-project/pull/115128