[tree-ssa] Bootstrap failure on powerpc64-linux-gnu

[law@redhat.com]

In message <u8r7z7lvww.fsf@gromit.moeb>, Andreas Jaeger writes:
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 >law@redhat.com writes:
 >
 >>  >Unfortunatly gdb seems unable to debug this :-(
 >> Let's deal with the x86_64 problem first.  I doubt the underlying cause
 >> of the two bugs is the same, but you never know :-)
 >
 >Fine with me - I'll try on monday with a colleague to debug this on
 >powerpc64...
OK.  In the mean time I'll start a build/test cycle on my ppc32 box in
the hopes of triggering some kind of failure.  I'll hold off on the next
improvement to the jump threading stuff until we get this resolved.

jeff