Reducing the amount of builtins by merging named patterns

[Blumental Maxim <bvmaks at gmail dot com>]

Hello everyone.

I'm working on reducing the amount of builtin's in i386. My approach
is to merge similar patterns into one with a fake argument which
determines which instruction to print.

We have ~30 groups of similar  (i.e.having similar sets of attributes)
named patterns. These groups together include ~230 template (i.e.
having substitution attributes in their names) named patterns in
total. So, we can reduce the amount of template named patterns by ~200
at best. Those template named patterns correspond to several specific
named patterns each. E.g. in my patch (see attached patch) I merged
two template named patterns into one and that allowed me to replace
four builtin's with only two.

Should I continue to work in that direction?

Attachment: named_patts_merge.patch
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