Sparc bootstrap failure, dataflow related?

[Kaveh R. GHAZI]

I'm getting a new bootstrap failure today on sparc-sun-solaris2.10 which
I've filed under PR bootstrap/32312.  GCC dies in stage1 building libgcc2,
I see that it's getting a SEGV because the variable "df" is nil.  It might
be related to the dataflow merge.

There's an attachment in the PR, would you please take a look?

		Thanks,
		--Kaveh
--
Kaveh R. Ghazi			ghazi@caip.rutgers.edu