[llvm] [LLVM] Add new attribute `optdebug` to optimize for debugging (PR #66632)

[David Blaikie via llvm-commits]

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@@ -2325,6 +2325,7 @@ void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D,
       B.addAttribute(llvm::Attribute::Naked);
 
     // OptimizeNone wins over OptimizeForSize and MinSize.
+    F->removeFnAttr(llvm::Attribute::OptimizeForDebugging);
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dwblaikie wrote:

+1, and otherwise the change makes sense to me. Could you post about this on Discourse, pointing to this pull request - just to make sure folks are aware we're adding a new IR attribute here? Be good to ensure there's consensus. 

https://github.com/llvm/llvm-project/pull/66632