[PATCH] Change order of tablegen generated fastisel instruction code to be based on instruction complexity

[Bill Seurer]

>>! In D6220#8, @echristo wrote:
>>>! In D6220#5, @seurer wrote:
>>>>! In D6220#4, @wschmidt wrote:
>>> I like this approach.  What did you do to verify the code that's produced for various targets?  (You probably told me this but I've forgotten.)
>> 
>> I went through some of the generated fastisel .inc files comparing them to a version generated without this change to see if anything stood out as broken.  The ordering is different of course but I am not familiar with the other targets and so I don't know if they are OK or not.  For Power it was all OK.
>> 
>> I tried to build the X86 target on my laptop to run tests there but I never got it to work.
> 
> What problems did you have here? (Though the tests in test/CodeGen/X86 should pass either way)

The configure script complained about Python and I can't get it (Python) to build for some reason.  I still plan on trying to get it to work.

http://reviews.llvm.org/D6220