[PATCH] D42631: [DAGCombiner] Add one use check before calling SimplifyDemandedBits on the value in visitStore.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
Herald added a subscriber: javed.absar.

The SimplifyDemandedBits entry point used by DAGCombiner forces the AssumeSingleUse flag to be set to true preventing SimplifyDemandedBits from protecting this itself. Every other caller from DAGCombine pass the node being visited due to SimplifyDemandedBits so this isn't a problem for them.


Repository:
  rL LLVM

https://reviews.llvm.org/D42631

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/ARM/illegal-bitfield-loadstore.ll
  test/CodeGen/X86/norex-subreg.ll

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