[clang] [CIR] Call code gen; create empty cir.func op (PR #113483)

[Shoaib Meenai via cfe-commits]

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@@ -37,14 +40,39 @@ class CIRGenConsumer : public clang::ASTConsumer {
                  const LangOptions &LangOptions,
                  const FrontendOptions &FEOptions,
                  std::unique_ptr<raw_pwrite_stream> OS)
-      : OutputStream(std::move(OS)), FS(VFS),
+      : Action(Action), OutputStream(std::move(OS)), FS(VFS),
         Gen(std::make_unique<CIRGenerator>(DiagnosticsEngine, std::move(VFS),
                                            CodeGenOptions)) {}
 
+  void Initialize(ASTContext &Ctx) override {
+    assert(!Context && "initialized multiple times");
+
+    Context = &Ctx;
+
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smeenai wrote:

The newlines seem superfluous, unless there's more to be filled in here later.

https://github.com/llvm/llvm-project/pull/113483