[llvm] [ScalarEvolution] Avoid recursive proof blowup for recurrence starts (PR #225000)

via llvm-commits llvm-commits at lists.llvm.org
Mon Sep 21 00:13:28 PDT 2026


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Analysis/ScalarEvolution.cpp --diff_from_common_commit
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index 0067f0fe2..b0a4de387 100644
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -13197,7 +13197,8 @@ bool ScalarEvolution::isKnownViaNonRecursiveReasoning(CmpPredicate Pred,
          isKnownPredicateViaConstantRanges(Pred, LHS, RHS) ||
          IsKnownPredicateViaMinOrMax(*this, Pred, LHS, RHS) ||
          IsKnownPredicateViaAddRecStart(
-             Pred, LHS, RHS, [&](const SCEV *LStart, const SCEV *RStart) {
+             Pred, LHS, RHS,
+             [&](const SCEV *LStart, const SCEV *RStart) {
                // Reentering the full predicate prover here can recursively
                // branch into induction proofs for a chain of recurrences.
                return isKnownViaNonRecursiveReasoning(Pred, LStart, RStart);

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https://github.com/llvm/llvm-project/pull/225000


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