[Bug middle-end/50199] [4.7 Regression] wrong code with -flto -fno-merge-constants

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50199

--- Comment #8 from Jan Hubicka <hubicka at gcc dot gnu.org> 2012-01-04 12:57:28 UTC ---
I agree that ignoring the bug or adding sorry refusing -fno-merge-constants
-flto is probably only way to deal with it in 4.7.

If we go the way translating into initialized vars, we probably could translate
string constants as easilly as const_decls, so perhaps there is no frontend
change needed at all.

In general it would be very useful to have pass tagging ADDR_EXPRs on whether
the address of object taken needs to be unique or can change freely. This would
be useful at several places in IPA and also we could then only promote some of
the const decls.

Honza