[clang] [CIR] Add bit reverse and byte reverse operations (PR #147200)

[Henrich Lauko via cfe-commits]

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@@ -2661,6 +2661,55 @@ def BitPopcountOp : CIR_BitOpBase<"bit.popcnt",
   }];
 }
 
+def BitReverseOp : CIR_BitOpBase<"bit.reverse", CIR_UIntOfWidths<[8, 16, 32, 64]>> {
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xlauko wrote:

I would also suggest to rename to `bitreverse` to mirror builtins name. Also dot slightly implies some "namespace".

https://github.com/llvm/llvm-project/pull/147200