[PATCH] D120285: [AMDGPU] Extend SILoadStoreOptimizer to handle global saddr loads

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

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This adds handling of the _SADDR forms to the GLOBAL_LOAD combining.

TODO: merge global stores.
TODO: merge flat load/stores.
TODO: merge flat with global promoting to flat.


https://reviews.llvm.org/D120285

Files:
  llvm/lib/Target/AMDGPU/SILoadStoreOptimizer.cpp
  llvm/test/CodeGen/AMDGPU/merge-global-load-store.mir

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