[clang] [CIR] Correctly pass func self-comdat & alignment (PR #223773)

[Andy Kaylor via cfe-commits]

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@@ -4293,6 +4293,8 @@ def CIR_FuncOp : CIR_Op<"func", [
     >:$calling_conv,
     OptionalAttr<StrAttr>:$sym_visibility,
     UnitAttr:$comdat,
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andykaylor wrote:

Do we still need this?

https://github.com/llvm/llvm-project/pull/223773