Add a link to the rational on lack of const for IR units in the developer guide

PiperOrigin-RevId: 266583374

diff --git a/mlir/g3doc/DeveloperGuide.md b/mlir/g3doc/DeveloperGuide.md
index 18be078..717632b 100644 (file)
--- a/mlir/g3doc/DeveloperGuide.md
+++ b/mlir/g3doc/DeveloperGuide.md
@@ -13,6 +13,7 @@ LLVM style guide:
 *   Adopts [camelBack](https://llvm.org/docs/Proposals/VariableNames.html);
 *   Except for IR units (Region, Block, and Operation), non-nullable output
     argument are passed by non-const reference in general.
+*   IR constructs are not designed for [const correctness](UsageOfConst.md).
 
 ## Pass name and other command line options