Tom Stellard f01af29f01 MachineCSE: Add a target query for the LookAheadLimit heurisitic ...

This is used to determine whether or not to CSE physical register
defs.

Differential Revision: http://reviews.llvm.org/D9472

llvm-svn: 236923

2015-05-09 00:56:07 +00:00

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