Andrew Trick 17d35e57a5 misched: implemented a framework for top-down or bottom-up scheduling. ... New flags: -misched-topdown, -misched-bottomup. They can be used with the default scheduler or with -misched=shuffle. Without either topdown/bottomup flag -misched=shuffle now alternates scheduling direction. LiveIntervals update is unimplemented with bottom-up scheduling, so only -misched-topdown currently works. Capped the ScheduleDAG hierarchy with a concrete ScheduleDAGMI class. ScheduleDAGMI is aware of the top and bottom of the unscheduled zone within the current region. Scheduling policy can be plugged into the ScheduleDAGMI driver by implementing MachineSchedStrategy. ConvergingScheduler is now the default scheduling algorithm. It exercises the new driver but still does no reordering. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152700 91177308-0d34-0410-b5e6-96231b3b80d8		2012-03-14 04:00:41 +00:00
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llvm	misched: implemented a framework for top-down or bottom-up scheduling.	2012-03-14 04:00:41 +00:00
llvm-c	[unwind removal] Remove all of the code for the dead 'unwind' instruction. There	2012-02-06 21:44:22 +00:00