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This unifies the behavior in debug and optimize build, since
be_set_transformed_node also marks the node as visited.
Furthermore, nobody should call be_is_transformed for the current node,
since this would mean we ran into a cycle (which is covered by an assert in the
debug build).

Heights are the longest chain of users, not operands, in the block.
Therefore the after nodes all have the same height of 0, because they
have no users, yet.

This fixes several tests on SPARC.

The functions were all dealing with graphs so ir/ir is a more logical
place to be.

Also move ir_nodemap struct into a new irnodemap_t.h file.

This resolves problems with hidden dependencies during code selection, which cause dependency cycles and therefore fixes backend/scheduled.c.
Also it grants the code selection slightly more freedom by not arbitrarily restricting the order by stack dependencies.

Do not use the entity address as number because that makes things
nondeterministic.

Patch submitted by Rich Felker <dalias@aerifal.cx>

Do not use the type address as number because that makes things
nondeterministic.

The official website is http://libfirm.org; the bugtracker is not linked
to the /firm subdir yet but still only available as ~firm/bugs.

be: Pass the input requirements directly to the constructors of nodes, which have a variable number of arguments.