[llvm] [SPIR-V] Don't lower builtin variadic functions (PR #188517)

[Dmitry Sidorov via llvm-commits]

================
@@ -627,6 +633,9 @@ bool ExpandVariadics::expandCall(Module &M, IRBuilder<> &Builder, CallBase *CB,
   bool Changed = false;
   const DataLayout &DL = M.getDataLayout();
 
+  if (ABI->ignoreFunction(CB->getCalledFunction()))
----------------
MrSidims wrote:

Can we reach it in indirect call handling path? 

https://github.com/llvm/llvm-project/pull/188517