On Thu, Jun 03, 2021 at 01:32:54PM -0600, Jeff Law wrote: > On 6/2/2021 4:43 PM, Segher Boessenkool wrote: > >We have has const0_rtx etc. since forever, this patch just increases the > >range (to those values that have had guaranteed unique RTXes since > >decades as well). > Yea, but often what you really want is CONST0_RTX (mode) instead of > const0_rtx. It's easily goof'd and often the cause minor missed > optimizations.
I'd say "sometimes" instead of "often"... almost always you really do want a scalar integer. Also, although CONST0_RTX makes sense for pretty much all modes, CONST64_RTX will not (and those are not currently unique RTX anyway). Segher
