[clang] [clang][modules] Reset codegen options. (PR #74006)

[Juergen Ributzka via cfe-commits]

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@@ -515,6 +430,8 @@ ENUM_CODEGENOPT(ZeroCallUsedRegs, llvm::ZeroCallUsedRegs::ZeroCallUsedRegsKind,
 /// non-deleting destructors. (No effect on Microsoft ABI.)
 CODEGENOPT(CtorDtorReturnThis, 1, 0)
 
+#include "DebugOptions.def"
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ributzka wrote:

That was my initial idea, but it ballooned into a lot of code changes. Turns out the debug options are used in a lot of places. It could be done, but it would be a lot of churn.

https://github.com/llvm/llvm-project/pull/74006