[Mlir-commits] [mlir] [mlir][nvgpu] update commit group and wait async ops (PR #130482)

[Guray Ozen]

grypp wrote:

> 
> 
> 
> 
> 
> 
> > When you break SSA semantic like following, is reordering the OPs allowed?
> 
> > 
> 
> > ```
> 
> > nvgpu.device_async_create_group %0
> 
> > nvgpu.device_async_wait { numGroups = 1 : i32 }
> 
> > ```
> 
> 
> 
> It cannot be reordered, `nvgpu.device_async_wait` should be similar to gpu.barrier.

They should be reordered yes. But what stops the compiler to reorder them? When there was SSA semantic, the reordering wasn't possible. 

https://github.com/llvm/llvm-project/pull/130482