Andrew Trick 2674a4acdb Reapply 155668: Fix the SD scheduler to avoid gluing the same node twice.
This time, also fix the caller of AddGlue to properly handle
incomplete chains. AddGlue had failure modes, but shamefully hid them
from its caller. It's luck ran out.

Fixes rdar://11314175: BuildSchedUnits assert.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155749 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-28 01:03:23 +00:00
..
2012-03-11 06:09:17 +00:00
2012-04-04 20:33:56 +00:00
2012-04-18 18:09:53 +00:00