https://github.com/Friedrich20 updated
https://github.com/llvm/llvm-project/pull/74716
>From 5ef11803b597fec44b64239824a4c9d3280cfea6 Mon Sep 17 00:00:00 2001
From: Wei Tao <friedrich.t...@gmail.com>
Date: Thu, 7 Dec 2023 21:33:40 +0800
Subject: [PATCH] [LLVM][CanonicalizeFreezeInLoops] fix duplicate removal
---
.../Transforms/Utils/CanonicalizeFreezeInLoops.cpp | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/llvm/lib/Transforms/Utils/CanonicalizeFreezeInLoops.cpp
b/llvm/lib/Transforms/Utils/CanonicalizeFreezeInLoops.cpp
index fb4d8288537725..ff1eb17e0c2488 100644
--- a/llvm/lib/Transforms/Utils/CanonicalizeFreezeInLoops.cpp
+++ b/llvm/lib/Transforms/Utils/CanonicalizeFreezeInLoops.cpp
@@ -151,11 +151,18 @@ bool CanonicalizeFreezeInLoopsImpl::run() {
}
}
+ bool Exist = false;
auto Visit = [&](User *U) {
if (auto *FI = dyn_cast<FreezeInst>(U)) {
- LLVM_DEBUG(dbgs() << "canonfr: found: " << *FI << "\n");
- Info.FI = FI;
- Candidates.push_back(Info);
+ for (const auto &Candidate : Candidates) {
+ auto *FI_cand = Candidate.FI;
+ Exist = (FI_cand == FI) ? true : Exist;
+ }
+ if (!Exist) {
+ LLVM_DEBUG(dbgs() << "canonfr: found: " << *FI << "\n");
+ Info.FI = FI;
+ Candidates.push_back(Info);
+ }
}
};
for_each(PHI.users(), Visit);
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