[Bug middle-end/39326] Segmentation fault with -O1, out of memory with -O2

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39326

--- Comment #51 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-22 14:00:25 UTC ---

>     (struct mem_ref): Replace mem member with ao_ref typed member.

RTL gcse (-O2) suffers from the same slowness in its dependence tests.  Caching
ao_ref instead of just mem and alias-set in RTL mem-attrs would improve
this tremendously.

A quick try reveals that gengtype is not at all happy with including
something in rtl.h though :/