[Mosaic GPU] Avoid unnecessary conversion to and from ptr for lowering of dialect barriers. #30545
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…g of dialect barriers. PiperOrigin-RevId: 788907078
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In [#30545](#30545), we replaced the conversion from LLVM pointer to Memref with an unrealized conversion cast. We forgot to update the lowering of `InitializeBarrierOp` accordingly. The reason this is not a problem is because the result of `InitializeBarrierOp` is never used. We could drop the returned value from the op but this is orthogonal to this change. PiperOrigin-RevId: 826498254
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[Mosaic GPU] Avoid unnecessary conversion to and from ptr for lowering of dialect barriers.