[clang] [clang-repl] : Fix clang-repl crash with --cuda flag (PR #136404)

[Vassil Vassilev via cfe-commits]

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@@ -760,8 +787,10 @@ std::unique_ptr<llvm::Module> Interpreter::GenModule() {
   return nullptr;
 }
 
-CodeGenerator *Interpreter::getCodeGen() const {
-  FrontendAction *WrappedAct = Act->getWrapped();
+CodeGenerator *Interpreter::getCodeGen(IncrementalAction *Action) const {
+  if (!Action)
+    Action = Act.get();
+  FrontendAction *WrappedAct = Action->getWrapped();
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vgvassilev wrote:

I do not understand this change. Is it because we call `getCodeGen` from both Device and Host compiler instance but we only return the codegen for the Host?

https://github.com/llvm/llvm-project/pull/136404