Andrew Trick 09aa9fe96b Introducing a new method of tracking register pressure. We can't ... precisely track pressure on a selection DAG, but we can at least keep it balanced. This design accounts for various interesting aspects of selection DAGS: register and subregister copies, glued nodes, dead nodes, unused registers, etc. Added SUnit::NumRegDefsLeft and ScheduleDAGSDNodes::RegDefIter. Note: I disabled PrescheduleNodesWithMultipleUses when register pressure is enabled, based on no evidence other than I don't think it makes sense to have both enabled. llvm-svn: 124853		2011-02-04 03:18:17 +00:00
..
llvm	Introducing a new method of tracking register pressure. We can't	2011-02-04 03:18:17 +00:00
llvm-c	Do not include DataTypes.h in llvm-c/lto.h.	2011-01-07 22:26:25 +00:00