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Sanjay Patel
31ddcffc0e
[TargetLowering] improve the default expansion of uaddsat/usubsat
This is a subset of what was proposed in: D59006 ...and may overlap with test changes from: D59174 ...but it seems like a good general optimization to turn selects into bitwise-logic when possible because we never know exactly what can happen at this stage of DAG combining depending on how the target has defined things. Differential Revision: https://reviews.llvm.org/D59066 llvm-svn: 356332
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