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Subject: [Bug tree-optimization/33763] [4.3/4.4/4.5/4.6 Regression] Bogus inlining failed in call to `xxx': redefined extern inline functions are not considered for inlining
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33763

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2007-10-14 10:26:41         |2011-03-04 10:26:41
      Known to fail|                            |4.6.0

--- Comment #19 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-03-04 12:36:56 UTC ---
Still fails to inline baz (not a regression) and diagnoses this (this is
the regression).

> When a gnu_inline (or extern inline gnu89) function has a real is redefined, we
> don't want any inlining for that function even if it is always_inline, at least
> GCC always behaved that way and even on the simpler testcase behaves that way.

I don't think this is the desired behavior (nor is it documented).  If it is
then we should simply drop the always-inline attribute when merging the
function decls (basically throw away the inline definition).