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
As discussed on D43014, we need the ability to flip UMIN/UMAX to (legal) SMIN/SMAX llvm-svn: 324826