2011/2/26 Georg-Johann Lay <a...@gjlay.de>: > Georg-Johann Lay schrieb: >> >> Denis Chertykov schrieb: >> >>> 2011/2/26 Georg Johann Lay <a...@gjlay.de> >>> >>>> Eric Botcazou schrieb: >>>> >>>>>> What does "word" mean here? Is it a 32-bit entity or is it according >>>>>> to >>>>>> word_mode which is QImode for avr? >>>>> >>>>> >>>>> The latter, it is machine-dependent. >>>>> >>>>> >>>>> >>>>>> So the same should be true for QI-subregs of scalar modes if >>>>>> UNITS_PER_WORT = 1. Right? >>>>> >>>>> >>>>> Right. >>>> >>>> >>>> Thanks for that definite clarification. >>> >>> >>> >>> As I understand PR46779 and PR45291 no longer an AVR port bugs. >>> And the following comment is not a true anymore: >>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45291#c2 >>> Am I right ? >> >> >> At least the analysis I gave there is incorrect. >> >> I remember a problem in avr backend concerning the frame pointer because >> QImode was allowed in FP's hard regs... that sort of problem. Was that fixed >> here or just in some distribution like WinAVR? So perhaps it's still this FP >> problem?
I don't know anything about WinAVR. > Ok, this is the patch I meant: > > http://gcc.gnu.org/viewcvs?view=revision&revision=86842 > > it allows just Pmode in r29:r28 because of some spill failures in PR15417 > and PR12017. It was a stupid workaround. I think that the problem exists anyway because it's not a port problem. Denis.
