tree 7ce54960e5d4450daf7171938e552083a8b78c39
parent 14868f86a33c064e561c05dc66d48f4ffc3889fe
author Jinsong Ji <jji@us.ibm.com> 1559919287 +0000
committer Copybara-Service <copybara-worker@google.com> 1603053508 -0700

[MachineScheduler] checkResourceLimit boundary condition update

When we call checkResourceLimit in bumpCycle or bumpNode, and we
know the resource count has just reached the limit (the equations
 are equal). We should return true to mark that we are resource
limited for next schedule, or else we might continue to schedule
in favor of latency for 1 more schedule and create a schedule that
 actually overbook the resource.

When we call checkResourceLimit to estimate the resource limite before
scheduling, we don't need to return true even if the equations are
equal, as it shouldn't limit the schedule for it .

Differential Revision: https://reviews.llvm.org/D62345

llvm-svn: 362805
GitOrigin-RevId: 7aafdef62711c4da98a622658152aaed43d49696