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Commit f01af29f authored by Tom Stellard's avatar Tom Stellard
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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
parent d54fb899
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