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2017 Nov 23
3
mischeduler (pre-RA) experiments
...;latency heuristic boost" just above processor
resources checking:
tryCandidate() {
...
// Avoid increasing the max pressure of the entire region.
if (DAG->isTrackingPressure() && tryPressure(TryCand.RPDelta.CurrentMax,
Cand.RPDelta.CurrentMax, TryCand, Cand, RegMax, TRI, DAG->MF))
return;
/// INSERTION POINT
...
}
I had started to experiment with adding tryLatency() in various places,
and found this to be the best spot for SystemZ/SPEC-2006. This gave
noticeable improvements immediately that were to good to ignore, so I
started figuring...