> Denis wrote: > I have converted the AVR port from CC0 to CCmode. > But may be I have converted the port in wrong way. > (It's because I was interested in *this* way.) > > 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. > What do you (MAINTAINERS) think about this ?
Interesting: - might you be able to post the resulting port files for review? - are you proposing that all conditional branches then required to be explicitly paired with a corresponding immediately previous compare instruction? (if so, how is this a good thing observing that it's fairly typical for most conditional branches to be naturally based on comparisons against 0 resulting from the immediately preceding operation, which would have otherwise not required an explicit compare?) thanks
