Such a memcpy call results in undefined behavior.

Avoid using the op_pin_state enum as that contains confusing additional
entries that are not valid on a node. The only remaining state for a
node is pinned/floating which we can simply represent with a 0/1 value.

Unfortunately this is hard for the remaining computed defaults.

This way we are independent of the type of specfile.

Also improve the comment a bit

new_ir_node() correctly handles oparity_dynamic.

The jFirm generator reuses the code in spec_util and needs these
defaults too.

By default a node needs the graph explicitly given iff it has a known block.

Just inspecting the attribute block is sufficient.

= is_entconst(), is_typeconst, get_entconst_entity() and
get_typeconst_type()

There was a lot of duplicated code, some changes in the templates allows
to share the two generators.

All users of NEW_ARR_A used it to construct a simple array, yet noone
cared about it actually being an array with a length field in front. For
this simple use case you should use ALLOCAN.

This is a major Makefile refactoring:
differentiate between:
- source files in $(srcdir)
- generated files in $(top_builddir)/gen
- object files in $(top_builddir)/$(variant)/ aka $(builddir)
- documentation in $(top_builddir)/doc

I don't really understand what it was supposed to do (because nodes
using/producing should be pretty much immovable anyway because of their
dependencies, so an additional pinning type appears unnecessary).
In practice there was no code differentiating between mem_pinned and exc_pinned.

the templates are now friendlier for usage outside of libfirm

Templates are put in separate files now, making the main script more
generic in nature

oparity_unary, oparity_binary require opindex to be set, which wasn't
always the case.
Also people seem to expect certain semantics from unops/binops, like
being arithmetic operations. So we shouldn't automatically set
oparity_XXX.

Just state the copyright and the project the files belong to. You can
then find the COPYING file for the whole project.

So all files in libFirm do this consistently

get_irn_op_() checks the same.