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* [SystemZ] Remove icmp undef Simon Pilgrim2019-03-141-3/+3
| | | | | | Prep-work for PR40800 (Add UNDEF handling to SelectionDAG::FoldSetCC) llvm-svn: 356138
* [TargetLowering] Add ISD::OR + ISD::XOR handling to SimplifyDemandedVectorEltsSimon Pilgrim2018-12-151-9/+10
| | | | | | Differential Revision: https://reviews.llvm.org/D55600 llvm-svn: 349264
* Regenerate knownbits test. NFCI.Simon Pilgrim2018-12-121-13/+27
| | | | | | A future SimplifyDemandedBits patch will affect this code and I want to ensure the codegen diff is obvious. llvm-svn: 348925
* [SystemZ] computeKnownBitsForTargetNode() / ComputeNumSignBitsForTargetNode()Jonas Paulsson2018-03-171-0/+51
Improve/implement these methods to improve DAG combining. This mainly concerns intrinsics. Some constant operands to SystemZISD nodes have been marked Opaque to avoid transforming back and forth between generic and target nodes infinitely. Review: Ulrich Weigand llvm-svn: 327765
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