[clang] [CIR] Upstream global initialization for ArrayType (PR #131657)

[Amr Hesham via cfe-commits]

AmrDeveloper wrote:

> If you just set commonElementType to {} as is done in the incubator, this will eventually reach the NYI state in emitConstantArray and this code won't need to be updated later.

@andykaylor Yes, this is a better approach, I updated the code

Thanks

https://github.com/llvm/llvm-project/pull/131657