[clang] [CIR] Implement CoawaitExpr for ComplexType (PR #194027)

[Andy Kaylor via cfe-commits]

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@@ -59,6 +59,8 @@ class RValue {
     return value;
   }
 
+  mlir::Value getAnyValue() const { return value; }
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andykaylor wrote:

Classic codegen has `getScalarVal`, and it would make sense to align with that. Right now, it should be a simple matter to replace all uses of `getValue` with `getScalarVal`. I have concerns about `getAnyVal` though. I think the assert in `getScalarValue` in classic codegen is necessary because aggregate and complex r-values don't have a single value to be returned. It looks to me like maybe we have that same issue in CIR with aggregate r-values.

https://github.com/llvm/llvm-project/pull/194027