From 2b00bf34ab9a05105bab35999a6dcfcaff1cf733 Mon Sep 17 00:00:00 2001 From: Kazu Hirata Date: Thu, 13 Feb 2025 09:19:09 -0800 Subject: [PATCH] [Utils] Avoid repeated hash lookups (NFC) --- llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp b/llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp index 89cfee2acd82c..054b0ba2ba664 100644 --- a/llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp +++ b/llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp @@ -395,8 +395,9 @@ llvm::UnrollAndJamLoop(Loop *L, unsigned Count, unsigned TripCount, } // Update our running maps of newest clones - PrevItValueMap[New] = (It == 1 ? *BB : LastValueMap[*BB]); - LastValueMap[*BB] = New; + auto &Last = LastValueMap[*BB]; + PrevItValueMap[New] = (It == 1 ? *BB : Last); + Last = New; for (ValueToValueMapTy::iterator VI = VMap.begin(), VE = VMap.end(); VI != VE; ++VI) { PrevItValueMap[VI->second] =