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Commit 33b07d67 authored by Tim Northover's avatar Tim Northover
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GlobalISel: implement legalization pass, with just one transformation. 

This adds the actual MachineLegalizeHelper to do the work and a trivial pass
wrapper that legalizes all instructions in a MachineFunction. Currently the
only transformation supported is splitting up a vector G_ADD into one acting on
smaller vectors.

llvm-svn: 276461
parent e4a4f33d
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