On Mon, Jul 20, 2015 at 12:04 PM, Segher Boessenkool <seg...@kernel.crashing.org> wrote: > After Kyrill's patch (r225996) (changing combine to do simplification > before doing some transformations) a shortcoming of the rs6000 backend > becomes obvious: we have no patterns to handle > > (set (reg:DI) (lt:DI (reg:SI) (const_int 0))) > > although we can do that with a single rotate-and-mask instruction. > Previously, combine usually came up with a more complex pattern (that > we do implement), hiding the issue. > > This patch adds a define_insn for the pattern. > > > 2015-07-20 Segher Boessenkool <seg...@kernel.crashing.org> > > * config/rs6000/rs6000.md (*lt0_disi): New.
This is okay. Thanks, David
