[clang] [llvm] [polly] [IRBuilder] Make IRBuilder inserter non-virtual (PR #229700)

[Florian Hahn via cfe-commits]

================
@@ -137,15 +136,15 @@ class IRBuilderBase {
 
 public:
   IRBuilderBase(LLVMContext &context, const IRBuilderFolder &Folder,
----------------
fhahn wrote:

Should this be protected, as `InsertFn` is protected?

https://github.com/llvm/llvm-project/pull/229700