Thou shalt have no other gods before the ANSI C standard 1558

Perhaps some have taken a more generic path, but I thought the question was fairly specific:

Will a C compiler (with or without optimizer) hoist a strlen() call out of a for loop, particular the body of the "for(...)" itself?

I prefer empirical evidence to theory on this, and so far, half a dozen compilers have answered "no" to this question. Again, if anyone can point to one that answers "yes", I'd like to know.

The more important question of course is that if the outcome is compiler dependent (at best) and likely to fail on the most commonly used C compilers in existence, why would a programmer *not* hoist the call themselves?

I am afraid that the answer may be that far too many people, comprised of students, textbook authors, teachers and even experienced developers think that it will, and never bother to find out for themselves.

You can add the whole "what does volatile really do?", and the endless debates on what magical properties it may or may not convey on an object (C sense) to this debate as a corollary.

-- Randy Howard (2reply remove FOOBAR) "Rally Mohawks, and bring your axes and tell King George we'll pay no taxes"