[llvm-branch-commits] [llvm] [SelectionDAG][X86] Split via Concat vector types for atomic load (PR #120640)

[via llvm-branch-commits]

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@@ -1421,6 +1424,35 @@ void DAGTypeLegalizer::SplitVectorResult(SDNode *N, 
unsigned ResNo) {
     SetSplitVector(SDValue(N, ResNo), Lo, Hi);
 }
 
+void DAGTypeLegalizer::SplitVecRes_ATOMIC_LOAD(AtomicSDNode *LD) {
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jofrn wrote:

I had tried doing it by splitting Lo and Hi. I ran into an issue though because 
TokenFactor (what we join our values on) requires glue operands; however, 
EXTRACT_SUBVECTOR does not have these, nor does DAG.getAtomicLoad.

https://github.com/llvm/llvm-project/pull/120640
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