[PATCH] D62910: [DAGCombine] MergeConsecutiveStores - improve non-temporal load\store handling (PR42123)

Wed Jun 5 11:36:28 PDT 2019

niravd added inline comments.

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Comment at: lib/CodeGen/SelectionDAG/DAGCombiner.cpp:15600
+
+      MachineMemOperand::Flags StMMOFlags =
+          IsNonTemporalStore ? MachineMemOperand::MONonTemporal
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Looks like we were erroneously transferring dereferencable from load to store on merge before. I think we need to do a store version of the isDereferencable calculation or we'll only preserve it on truncstores. 

Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62910/new/

https://reviews.llvm.org/D62910