[clang] [CIR] Preserve annotate attributes on record declarations (PR #207551)

[via cfe-commits]

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@@ -3263,6 +3263,34 @@ def CIR_GetGlobalOp : CIR_Op<"get_global", [
   }];
 }
 
+//===----------------------------------------------------------------------===//
+// RecordAnnotationOp
+//===----------------------------------------------------------------------===//
+
+def CIR_RecordAnnotationOp : CIR_Op<"record_annotation"> {
+  let summary = "Declares the source-level annotations on a record type";
+  let description = [{
+    The `cir.record_annotation` operation records the
+    `__attribute__((annotate(...)))` attributes attached to a
+    `clang::RecordDecl` (struct/class/union). It is emitted once per annotated
+    record, since `cir::RecordType` is uniqued by name/body and does not carry
+    an op-level attribute slot the way `cir.global`/`cir.func` do.
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RedNicStone wrote:

I would be probably be better to handle this as an attribute. Using the name has a few drawbacks of course (anonymous types namely).
Because I'm using this feature in my own compiler, I was intending to keep the change a bit more minimal. Adding `#cir.annotate` has more surface area and would require some changes to storage uniquing (for anonymous types) and parsing.
I'm happy to change it over to attributes of course.

https://github.com/llvm/llvm-project/pull/207551