------- Comment #9 from richard dot guenther at gmail dot com 2008-10-12 21:17 ------- Subject: Re: [4.4 Regression]: Revision 141067 breaks Linux/x86
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. > 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