[Bug tree-optimization/56294] BOOT_CFLAGS='-O2 -g -fno-ipa-sra' leads to bootstrap comparison failure

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56294

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-01 10:27:50 UTC ---
A guess is that you end up creating SSA names during code transform in
different
order - which can result from walking a hashtable to do things (which might
be in different order when it doesn't have the same number of entries).

Note that if you process debug stmts _at all_ (thus end up creating new SSA
names because of them) then this will break as well.