[Bug lto/45375] Mozilla does not build with LTO

["hubicka at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #1 from hubicka at gcc dot gnu dot org  2010-08-22 12:39 -------
Quick summary :)
1) -g build is currently broken because of dwarf2out recursion. 
2) sqlite still gets miscompiled at 32bit (PR44897), but works now at 64bit for
some reason
3) Workaround attached to PR44846 is needed to avoid ICE due to one decl C++ FE
issues
4) 32bit mozilla now builds fine for me when linked with -O2, but -Os (the
default) leads to segfault at startup apparently because xpcom components do
not reproduce correctly
5) Older versions of gold seems to have issues. 
6) Martin's devirtualization seems to behave funny doing 7400 clones and the
redirecting just about 20 calls.
7) Both Martin and Taras reported ICE in lto-symtab I can't reproduce
8) Mozilla needs some changes, since __attribute__ ((used)) is missing. I will
attach diff.
9) One needs 4GB in /tmp, with sane partitioning this goes down to 1GB
10) 32bit build gets close to addressing space issues at WPA stage, probably we
should not mmap all the .o files, since only about 1GB goes to garbage
collected memory.


-- 

hubicka at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mjambor at suse dot cz
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-08-22 12:40:00
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45375