[clang] [CIR] Upstream initial support for unary op (PR #131369)

[Andy Kaylor via cfe-commits]

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@@ -468,6 +468,55 @@ def BrOp : CIR_Op<"br",
   }];
 }
 
+//===----------------------------------------------------------------------===//
+// UnaryOp
+//===----------------------------------------------------------------------===//
+
+def UnaryOpKind_Inc   : I32EnumAttrCase<"Inc",   1, "inc">;
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andykaylor wrote:

The pre/post semantics are captured in the CIR itself by where the `cir.unary` op appears in the control flow.

https://github.com/llvm/llvm-project/pull/131369