From: Bill Wendling <isanbard@gmail.com>
Date: Sat, 30 Jun 2012 20:21:19 +0000 (+0000)
Subject: Don't reinsert the 'atexit' function if it already exists.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=c1b6ea7b6ce3a738accbacddf52480bf94354d2f;p=oota-llvm.git

Don't reinsert the 'atexit' function if it already exists.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159491 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Instrumentation/GCOVProfiling.cpp b/lib/Transforms/Instrumentation/GCOVProfiling.cpp
index dda92b18825..264a6a61536 100644
--- a/lib/Transforms/Instrumentation/GCOVProfiling.cpp
+++ b/lib/Transforms/Instrumentation/GCOVProfiling.cpp
@@ -687,8 +687,7 @@ void GCOVProfiler::insertCounterWriteout(
 
   FTy = FunctionType::get(Type::getInt32Ty(*Ctx),
                           PointerType::get(FTy, 0), false);
-  Function *AtExitFn =
-    Function::Create(FTy, GlobalValue::ExternalLinkage, "atexit", M);
+  Constant *AtExitFn = M->getOrInsertFunction("atexit", FTy);
   Builder.CreateCall(AtExitFn, WriteoutF);
   Builder.CreateRetVoid();