irdump: Clean up dump_node_opcode().
irdump: Show the value of a Const when dumping its opcode.
without be_Spill/be_Reload we won't set entities on be nodes
remove unused be_get_frame_offset()/be_node_set_frame_entity()
remove unused be_get_frame_entity()
nobody should be using be_Call after code selection
bespillslots: do not create affinity edges for self-loops
ia32: fix 8/16 bit push/pop
ia32: support 10byte memperms
ia32: fix problems with 80bit stores

- collect_and_rewire_users failed for users in other blocks: we really
  needed an SSA reconstruction
- Needed to shuffle the stored value to TOS before storing it
rework some bespillslots aspects

- We now create a spill/reload/phi-web and take the largest necessary
  reload size to determine the size of the entities and the spills.
- Some cleanups
ia32: use smaller spillslots where possible, float spills mode_E by default

This should reduce memory requirements in several cases and at the same
time fix a long standing correctness issue where we spilled float values
with 64bit precision instead of the full 80bit on x87.
bespillslots: use type size, not mode size
ia32: use 12 byte stackslots for mode_E
garbage_collect: cleanup, use C99
garbage_collect: need to follow aliases while marking