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* [X86][SSE] Enable SMIN/SMAX/UMIN/UMAX custom lowering for all legal typesSimon Pilgrim2018-02-111-5/+1
| | | | | | | | This allows us to recognise more saturation patterns and also simplify some MINMAX codegen that was failing to combine CMPGE comparisons to a legal CMPGT. Differential Revision: https://reviews.llvm.org/D43014 llvm-svn: 324837
* [X86][SSE] Add UMIN/UMAX combine testSimon Pilgrim2018-02-101-0/+47
As discussed on D43014, we need the ability to flip UMIN/UMAX to (legal) SMIN/SMAX llvm-svn: 324826
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