[llvm] [AMDGPU] Set glc bit for nontemporal loads on GFX10/11 (PR #89739)

[Fabian Ritter via llvm-commits]

ritter-x2a wrote:

Adding the GLC bit to nontemporal loads would cause them to avoid cache hits when the requested data is already in the cache.
This would reduce the performance of nontemporal loads unnecessarily; their point is only to signal that the data is not accessed soon after the load. We should therefore not merge this.

https://github.com/llvm/llvm-project/pull/89739