Andrew Trick 4c60b8a78d mi-sched: Precompute a PressureDiff for each instruction, adjust for liveness later. ...

Created SUPressureDiffs array to hold the per node PDiff computed during DAG building.

Added a getUpwardPressureDelta API that will soon replace the old
one. Compute PressureDelta here from the precomputed PressureDiffs.

Updating for liveness will come next.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189640 91177308-0d34-0410-b5e6-96231b3b80d8

2013-08-30 03:49:48 +00:00

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