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Commit 1a831345 authored by Andrew Trick's avatar Andrew Trick
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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.

llvm-svn: 189640
parent 057b04f6
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