https://github.com/vikramRH created https://github.com/llvm/llvm-project/pull/176692
None >From ff783aa3cb0e4370db025b61a395c1216269adba Mon Sep 17 00:00:00 2001 From: vikhegde <[email protected]> Date: Fri, 16 Jan 2026 14:53:54 +0530 Subject: [PATCH] [CodeGen][LSR][NPM] Make LoopStrengthReduce pass preserve LCSSA --- llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp index e9d78baece25b..91d2f65a05e62 100644 --- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -7135,6 +7135,10 @@ PreservedAnalyses LoopStrengthReducePass::run(Loop &L, LoopAnalysisManager &AM, if (!ReduceLoopStrength(&L, AM.getResult<IVUsersAnalysis>(L, AR), AR.SE, AR.DT, AR.LI, AR.TTI, AR.AC, AR.TLI, AR.MSSA)) return PreservedAnalyses::all(); + + // TODO: Remove this once the LSR handles LCSSA preservation completely. + if (auto *OuterLoop = L.getOutermostLoop()) + formLCSSARecursively(*OuterLoop, AR.DT, &AR.LI, &AR.SE); auto PA = getLoopPassPreservedAnalyses(); if (AR.MSSA) _______________________________________________ llvm-branch-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
