[Bug fortran/55395] [4.8 Regression] libgfortran bootstrap failure on powerpc-linux-gnu and arm-linux-gnueabi

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55395

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-04 15:10:00 UTC ---
(In reply to comment #8)
> OK, the aim was mostly to get rid of large constructors. Is it possible to tell
> when the DECL_INITIAL will be needed?  This problem also exists with LTO where > we do not stream initializers of variables not assigned to a given partition.

It is always used if available and there is no other way to generate the
location info for it (which for vars that were removed from the varpool is
probably always, I bet those aren't assigned memory locations).  The question
is of course if it can successfully generate something out of it or not, but
you can't guess that before it tried.
For the invalid error part of this PR, it would be just important that it
doesn't set DECL_INITIAL to error_mark_node, but some other magic value which
says, this decl had non-zero initializer, but ignore the other details about
it.  Of course to make the debug info more complete you really should keep the
initializer.
Aren't you building mozilla with LTO without -g anyway, given that LTO screws
up debug info so terribly that it isn't useful at all?
Can you come up with some short testcase that would show what kind of large
constructors you care about?