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.
-- // Bernardo Innocenti - Develer S.r.l., R&D dept. \X/ http://www.develer.com/
