[llvm] [AMDGPU] Add amdgcn.av.global.(load|store).b128 intrinsics (PR #191390)

[Sameer Sahasrabuddhe via llvm-commits]

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@@ -1776,6 +1776,111 @@ The AMDGPU backend implements the following LLVM IR intrinsics.
                                                    * :ref:`Synchronization Scope<amdgpu-intrinsics-syncscope-metadata-operand>`.
                                                      Note that the scope used must ensure that the L2 cache will be hit.
 
+  llvm.amdgcn.av.global.load.b128                  This intrinsic is supported on gfx9, gfx10, gfx11, and gfx12 targets.
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ssahasra wrote:

I moved everything to a new section. That seems to be how the cooperative atomics are documented too.

https://github.com/llvm/llvm-project/pull/191390