------- Comment #11 from zadeck at naturalbridge dot com 2008-10-12 21:19 ------- Subject: Re: [4.4 Regression]: Revision 141067 breaks Linux/x86
Richard Guenther wrote: > On Sun, Oct 12, 2008 at 11:12 PM, Kenneth Zadeck > <[EMAIL PROTECTED]> wrote: > >> andreast at gcc dot gnu dot org wrote: >> >>> ------- Comment #7 from andreast at gcc dot gnu dot org 2008-10-12 20:31 >>> ------- >>> I see a failure on sparc-solaris8/10 too. Configury of stage2 fails. >>> Applying the mentioned patch cures compilation. >>> My sparc config is with multilib. 32-bit/64-bit. >>> >>> >>> >>> >> The problem is that the bb is no longer kept in the df-ref, and is >> instead extracted from the insn. >> This particular problem was caused by insns being deleted in a pass that >> defers rescanning but that also changes register numbers. The fix >> checks to make sure the insn is still in a basic block before trying to >> mark the block as being dirty. >> > > Ok. I think it's odd that we keep refs to deleted insns - but that's probably > because of the deferred re-scan, right? > > Thanks, > Richard. > yes, this only is because of the deferred rescan. committed as revision 14178. kenny > >> 2008-10-12 Kenneth Zadeck <[EMAIL PROTECTED]> >> >> PR middle-end/37808 >> * df-scan.c (df_ref_change_reg_with_loc_1): Added test to make >> sure that ref has valid bb. >> >> Tested by me on both x86-32 and x86-64. Also tested by andreast on >> spark-solaris and by keating. >> >> OK to commit? >> >> kenny >> >> -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37808
