[clang] [CIR] Add cir-simplify pass (PR #138317)

[Andy Kaylor via cfe-commits]

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@@ -62,15 +62,17 @@ class CIRGenConsumer : public clang::ASTConsumer {
   IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS;
   std::unique_ptr<CIRGenerator> Gen;
   const FrontendOptions &FEOptions;
+  CodeGenOptions &codeGenOptions;
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andykaylor wrote:

```suggestion
  CodeGenOptions &CodeGenOptions;
```
Keep clang-style identifier naming throughout this file.

https://github.com/llvm/llvm-project/pull/138317