reload problem:

[Alexandre Oliva]

On Jan 22, 2002, Dmitry <diwil@mail.ru> wrote:

> I missed a fact, that during instruction recognition, gcc does not look at the condition.

It does.  It doesn't look at constraints, though.  Is this what you
meant?  I'll assume so henceforth.

> So, during reload pass it faces with a condition which cannot be satisfied.

The `0' constraint can be satisfied by reload: it suffices to save the
input register elsewhere, unless it's dead after that instruction, and
then store the output register in the intended output location.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                  aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist    *Please* write to mailing lists, not to me