[clang] [clang][dataflow] Check for backedges directly (instead of loop statements). (PR #68923)

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

:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff 50ece4cba949787241b5fbfc94be6cfdc66e90ee da8cacb47b8f80f7ecb1e86f98683be6c54b4e57 -- clang/lib/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.cpp clang/unittests/Analysis/FlowSensitive/TransferTest.cpp clang/unittests/Analysis/FlowSensitive/TypeErasedDataflowAnalysisTest.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.cpp b/clang/lib/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.cpp
index c635edd12219..d96ad66dd674 100644
--- a/clang/lib/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.cpp
+++ b/clang/lib/Analysis/FlowSensitive/TypeErasedDataflowAnalysis.cpp
@@ -53,7 +53,7 @@ static int blockIndexInPredecessor(const CFGBlock &Pred,
 }
 
 static bool isBackedgeNode(const CFGBlock &B) {
- return B.getLoopTarget() != nullptr;
+  return B.getLoopTarget() != nullptr;
 }
 
 namespace {
@@ -494,7 +494,6 @@ runTypeErasedDataflowAnalysis(
   PostOrderCFGView POV(&CFG);
   ForwardDataflowWorklist Worklist(CFG, &POV);
 
-
   std::vector<std::optional<TypeErasedDataflowAnalysisState>> BlockStates(
       CFG.size());
 

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https://github.com/llvm/llvm-project/pull/68923