[llvm-branch-commits] [llvm] [X86] Remove extra MOV after widening atomic store (PR #197619)

[Matt Arsenault via llvm-branch-commits]

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@@ -1242,6 +1242,105 @@ def : Pat<(v4i32 (atomic_load_128_v4i32 addr:$src)),
 def : Pat<(v4i32 (atomic_load_128_v4i32 addr:$src)),
           (VMOVAPDZ128rm addr:$src)>, Requires<[HasAVX512]>;
 
+// store atomic <2 x i8>
+def : Pat<(atomic_store_16
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arsenm wrote:

Are there existing non-store patterns for this? Can do a better job avoiding duplication (i.e, there should be a PatFrag that covers atomic and non-atomic cases) 

https://github.com/llvm/llvm-project/pull/197619