Jonas Paulsson 8b8e1adbde [SystemZ] Don't lower ATOMIC_LOAD/STORE to LOAD/STORE (#75879) ...

- Instead of lowering float/double ISD::ATOMIC_LOAD / ISD::ATOMIC_STORE
nodes to regular LOAD/STORE nodes, make them legal and select those nodes
properly instead. This avoids exposing them to the DAGCombiner.

- AtomicExpand pass no longer casts float/double atomic load/stores to integer
  (FP128 is still casted).

2024-03-18 17:21:50 -04:00

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