[Bug tree-optimization/47621] [4.6 Regression] Missed dependencies in address-taken optimization

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47621

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-02-06 23:08:39 UTC ---
Note to self:  Before the patch the code in the else branch never triggered.
The original idea was to preserve MEM[&a] re-writing into SSA form, which
didn't happen before the patch.  Re-writing the testcase in this PR would
also be nice, but I see other problems with this code (bit-field component-refs
come to my mind).

I have a patch.