[llvm] [WPD] set the branch funnel function entry count (PR #155657)

[Mircea Trofin via llvm-commits]

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@@ -1453,7 +1458,7 @@ void DevirtModule::tryICallBranchFunnel(
 
   FunctionType *FT =
       FunctionType::get(Type::getVoidTy(M.getContext()), {Int8PtrTy}, true);
-  Function *JT;
+  Function *JT = nullptr;
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mtrofin wrote:

it is a drive-by. Right now, no, because JT gets initialized below, but should that change later, initializing at declaration avoids risk of UB.

https://github.com/llvm/llvm-project/pull/155657