------- Comment #3 from pinskia at gcc dot gnu dot org  2010-03-20 20:59 -------
>There's a sequence point after evaluating the first operand.

With -W -Wall, I get:
t.c:79:58: warning: operation on ‘f->sp’ may be undefined

Looks like that is the issue.
So there might be still an missing sequence point.  I am going to reformat that
line to see if there is one missing.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43456