[llvm] [LoopInterchange] Make the entries of the Dependency Matrix unique (PR #116195)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff 3fcb9684cf6ba4ff9009ebabd9ff966eeb8b15f7 a177bc011f6c2d5c7c40ff5c04152bde330c3d43 --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 703be2fb7a..8e1d07792c 100644
--- a/llvm/lib/Transforms/Scalar/LoopInterchange.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopInterchange.cpp
@@ -159,11 +159,11 @@ static bool populateDependencyMatrix(CharMatrix &DepMatrix, unsigned Level,
         }
 
         // Make sure we only add unique entries to the dependency matrix.
-	std::string Hash = std::string(Dep.begin(), Dep.end());
-	if (UniqueDepEntries.find(Hash) == UniqueDepEntries.end() ) {
+        std::string Hash = std::string(Dep.begin(), Dep.end());
+        if (UniqueDepEntries.find(Hash) == UniqueDepEntries.end()) {
           UniqueDepEntries.insert(Hash);
           DepMatrix.push_back(Dep);
-	}
+        }
 
         if (DepMatrix.size() > MaxMemInstrCount) {
           LLVM_DEBUG(dbgs() << "Cannot handle more than " << MaxMemInstrCount

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https://github.com/llvm/llvm-project/pull/116195