Matthias Braun f29b12dca8 ScheduleDAGInstrs: Ignore dependencies of constant physregs
There is no need to track dependencies for constant physregs, as they
don't change their value no matter in what order you read/write to them.

Differential Revision: https://reviews.llvm.org/D26221

llvm-svn: 286526
2016-11-10 23:46:44 +00:00
2016-11-10 09:08:03 +00:00
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