From 4335dbaa1329e90649741c85e115b7f3b37faa8c Mon Sep 17 00:00:00 2001
From: KomiMoe <i@komi.moe>
Date: Wed, 25 Sep 2024 04:17:11 +0800
Subject: [PATCH] revert try to fix ubuntu link

---
 .../Obfuscation/StringEncryption.cpp          | 23 +------------------
 1 file changed, 1 insertion(+), 22 deletions(-)

diff --git a/llvm/lib/Transforms/Obfuscation/StringEncryption.cpp b/llvm/lib/Transforms/Obfuscation/StringEncryption.cpp
index e973c95d5511..df8fccef4f0b 100644
--- a/llvm/lib/Transforms/Obfuscation/StringEncryption.cpp
+++ b/llvm/lib/Transforms/Obfuscation/StringEncryption.cpp
@@ -72,27 +72,6 @@ struct StringEncryption : public ModulePass {
     return false;
   }
 
-  static bool isSafeToDelete(const Constant *C) {
-    SmallVector<const Constant *, 8> Worklist;
-    SmallPtrSet<const Constant *, 8> Visited;
-    Worklist.push_back(C);
-    while (!Worklist.empty()) {
-      const Constant *C = Worklist.pop_back_val();
-      if (!Visited.insert(C).second)
-        continue;
-      if (isa<GlobalValue>(C) || isa<ConstantData>(C))
-        return false;
-
-      for (const User *U : C->users()) {
-        if (const Constant *CU = dyn_cast<Constant>(U))
-          Worklist.push_back(CU);
-        else
-          return false;
-      }
-    }
-    return true;
-  }
-
   StringRef getPassName() const override { return {"StringEncryption"}; }
 
   bool runOnModule(Module &M) override;
@@ -530,7 +509,7 @@ void StringEncryption::deleteUnusedGlobalVariable() {
         if (GV->hasInitializer()) {
           Constant *Init = GV->getInitializer();
           GV->setInitializer(nullptr);
-          if (isSafeToDelete(Init))
+          if (isSafeToDestroyConstant(Init))
             Init->destroyConstant();
         }
         Iter = MaybeDeadGlobalVars.erase(Iter);