[clang] [CIR] Upstream global initialization for VectorType (PR #137511)

[Bruno Cardoso Lopes via cfe-commits]

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@@ -215,6 +215,37 @@ def ConstArrayAttr : CIR_Attr<"ConstArray", "const_array", [TypedAttrInterface]>
   }];
 }
 
+//===----------------------------------------------------------------------===//
+// ConstVectorAttr
+//===----------------------------------------------------------------------===//
+
+def ConstVectorAttr : CIR_Attr<"ConstVector", "const_vector",
+                               [TypedAttrInterface]> {
+  let summary = "A constant vector from ArrayAttr";
+  let description = [{
+    A CIR vector attribute is an array of literals of the specified attribute
+    types.
+  }];
+
+  let parameters = (ins AttributeSelfTypeParameter<"">:$type,
+		        "mlir::ArrayAttr":$elts);
+
+  // Define a custom builder for the type; that removes the need to pass in an
+  // MLIRContext instance, as it can be inferred from the `type`.
+  let builders = [
+    AttrBuilderWithInferredContext<(ins "cir::VectorType":$type,
+		                        "mlir::ArrayAttr":$elts), [{
+      return $_get(type.getContext(), type, elts);
+    }]>
+  ];
+
+  // Printing and parsing available in CIRAttrs.cpp
+  let hasCustomAssemblyFormat = 1;
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bcardosolopes wrote:

Have you tried to use a tablegen based asm fmt? The incubator impl is a bit outdated here - I don't see any real constraints these days blocking such approach.

https://github.com/llvm/llvm-project/pull/137511