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Re: New attempt: subword-based DCE, PR42575
On Thu, 2010-07-29 at 21:03 +0200, Bernd Schmidt wrote:
> On 07/29/2010 08:25 PM, David Edelsohn wrote:
> > This patch may have caused a new bootstrap ICE on PowerPC:
> > /farm/dje/src/src/gcc/cfg.c: In function 'scale_bbs_frequencies_gcov_type':
> > /farm/dje/src/src/gcc/cfg.c:1109:1: internal compiler error: in
> > delete_corresponding_reg_eq_notes, at dce.c:495
> > I see the error on powerpc-ibm-aix5.3 and I was told the error also
> > occurs on powerpc-darwin.
> Can you test the following patch? This makes sure we clear some DF
> flags during DCE, and while I was there I also made the whole thing
> conditional on flag_dce for consistency.
I tested this on powerpc64-linux and it does fix the bootstrap failure.