Philip Reames c86ed0055d Extract helper function to merge MemoryOperand lists [NFC] ...

In the discussion on http://reviews.llvm.org/D15730, Andy pointed out we had a utility function for merging MMO lists. Since it turned we actually had two copies and there's another review in progress (http://reviews.llvm.org/D15230) which needs the same, extract it into a utility function and clean up the interfaces to make it easier to use with a MachineInstBuilder.

I introduced a pair here to track size and allocation together. I think we should probably move in the direction of the MachineOperandsRef helper class, but I'm leaving that for further work. I want to get the poison state introduced before I make major changes to the interface.

Differential Revision: http://reviews.llvm.org/D15757

llvm-svn: 256909

2016-01-06 04:39:03 +00:00

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