[Bug tree-optimization/9079] [tree-ssa] Inline constant function pointers

["jamborm at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #19 from jamborm at gcc dot gnu dot org  2008-07-25 17:51 -------
As of revision 138092 we are handling this much better.

The example in bug description gets inlined at -O2 even with
-fno-early-inlining.

The example  in comment #10  does not work  as expected yet.   The new
edge is discovered but  the always_inline attribute is disregarded and
the inlined does  not decide to inline  it on its own.  I  will try to
fix this but it should be  noted that few guarantees can be made about
indirect  calls  to always_inline  functions  and about  always_inline
functions which have their addresses taken in general.

As far  as the  third example  in comment #11  is concerned,  the only
problem is  loading the  target function from  the array.   The loaded
value is not  recognized to be constant early  enough to be considered
for inlining.  That is really a separate issue though, quite different
from the one originally described.  I  will have a look at what we can
do earlier but I will close the bug if this is the only outstanding
issue and I don't see an easy fix.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9079