Bernardo Innocenti <[EMAIL PROTECTED]> writes: > Denis Chertykov wrote: > > > I have converted the AVR port from CC0 to CCmode. > > That's indeed very good news. Incidentally, CC0 > conversion of the AVR target was being discussed > in an off-list thread with Andy Hutchinson. > > > > But may be I have converted the port in wrong way. > > (It's because I was interested in *this* way.) > > Uh? That's very bad news. > > > > I have used CCmode register and havn't added the > > '(clobber (reg:QI CC_REGNUM))' to any insn that really clobber the > > CC_REGNUM just because AVR is'n needed in scheduling. > > I think that sequence of compare + cond-jump will exists in any > > compiler pass. > > The port was successfully tested without new regressions. > > Did you notice any pessimization spots in the generated > code? IIRC, the converted H8 backend required some > massaging before it was back on par with the old > version.
I have a bit pessimization but compare/branch operations can be optimized even more than CC0 version. Denis.
