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4 Commits

Author SHA1 Message Date
Tim Northover
61c16142b4 GlobalISel: extend add widening to SUB, MUL, OR, AND and XOR. 
These are the operations that are trivially identical. Division is omitted for
now because you need to use the correct sign/zero extension.

llvm-svn: 277775
 2016-08-04 21:39:49 +00:00
Tim Northover
9656f1476c GlobalISel: implement narrowing for G_ADD. 
llvm-svn: 277769
 2016-08-04 20:54:13 +00:00
Tim Northover
323358184e GlobalISel: add code to widen scalar G_ADD 
llvm-svn: 277747
 2016-08-04 18:35:11 +00:00
Tim Northover
33b07d6725 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
 2016-07-22 20:03:43 +00:00