[dataflow] remove try_auto_increment from regmove

[Steven Bosscher]

On 11/5/06, Kenneth Zadeck <zadeck@naturalbridge.com> wrote:
> I have no problem with this patch.  I would like to see it go in.
> However, the ppc only has pre* auto insns and the x86 has none.

But iiuyc, ARM does?

> You need to test this on a machine that has post* auto insns like the
> arm or the ia-64.  Unfortunately we do not have these ports working
> yet.  If you want to track down some bugs on these ports, we would be
> happy for the help.

Today I successfully built&tested an ARM compiler with the dataflow
branch, see http://gcc.gnu.org/ml/gcc-testresults/2006-11/msg00428.html

I also compared some assembler output (~440000 lines, preprocessed GCC
3.1) with and without Paolo's patch.There were no assembler
differences. A more thorough check ought to be performed but the
result is very promissing IMO.

Gr.
Steven