================
@@ -0,0 +1,44 @@
+//===- CIRDialect.td - CIR dialect -------------------------*- tablegen 
-*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM 
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the CIR dialect.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_CIR_DIALECT_IR_CIRDIALECT
+#define LLVM_CLANG_CIR_DIALECT_IR_CIRDIALECT
+
+include "mlir/IR/OpBase.td"
+
+def CIR_Dialect : Dialect {
+  let name = "cir";
+
+  // A short one-line summary of our dialect.
+  let summary = "A high-level dialect for analyzing and optimizing Clang "
+                "supported languages";
+
+  let cppNamespace = "::mlir::cir";
+
+  let useDefaultAttributePrinterParser = 0;
+  let useDefaultTypePrinterParser = 0;
+
+  let extraClassDeclaration = [{
+    void registerAttributes();
+    void registerTypes();
+
+    Type parseType(DialectAsmParser &parser) const override;
----------------
AaronBallman wrote:

> This will be added to generated class which have lower-case starting APIs: 
> consistency within the class seems to prevail to me.

Ah, then yeah, I agree. Thank you!

> You should really expect that all the MLIR code will follow this convention, 
> because it'll be intertwined closely with the MLIR framework.

MLIR isn't old enough to really get "grandfathered" in with their own style, so 
that's pretty surprising. That said, I *fully support* letting projects have 
project-specific policies including coding style, so I see no reason for MLIR 
to change either. Interfacing closely with MLIR does make this a bit awkward 
however, because it's also intertwined with the Clang code base. On balance, I 
think it's fine to follow the MLIR convention because I think there will be 
more surface area in common between CIR + MLIR than CIR + Clang (and Clang has 
plenty of inconsistency with coding style already so this is not really novel).

tl;dr: nothing needs to change here.

https://github.com/llvm/llvm-project/pull/86080
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