[Bug target/45475] target attribute use in libcpp breaks LTO bootstrap

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45475

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |lto
             Target|                            |i?86-*-*
             Status|REOPENED                    |NEW
          Component|lto                         |target
            Summary|target use in libcpp breaks |target attribute use in
                   |LTO bootstrap               |libcpp breaks LTO bootstrap

--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> 2012-10-17 09:34:14 UTC ---
The attribute handling side is missing from the LTO frontend, but I
wonder why handling the middle-end piece is not enough for it to work ...

The target / optimize attributes seem to be designed in a weird way ...
(ix86_valid_target_attribute_p does work besides checking whether
the attribute is "valid").  I'm sure that's not how it was intended to
work so I am calling this a target bug.  This work should be done
in the ix86_set_current_function hook.