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Change these schedulers to not emit no-ops. It turns out that

Browse Source 
the RR scheduler actually does look at latency values, but it
doesn't use a hazard recognizer so it has no way to know when
a no-op is needed, as opposed to just stalling and incrementing
the cycle count.

llvm-svn: 59759
This commit is contained in:
Dan Gohman 2008-11-21 00:10:42 +00:00
parent 4020b2b907
commit 66e692dd8f
2 changed files with 3 additions and 9 deletions
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4
lib/CodeGen/SelectionDAG/ScheduleDAGFast.cpp
View File

@ -577,9 +577,7 @@ void ScheduleDAGFast::ListScheduleBottomUp() {
}
NotReady.clear();
if (!CurSU)
Sequence.push_back(0);
else
if (CurSU)
ScheduleNodeBottomUp(CurSU, CurCycle);
++CurCycle;
}

8
lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
View File

@ -1052,9 +1052,7 @@ void ScheduleDAGRRList::ListScheduleBottomUp() {
}
NotReady.clear();
if (!CurSU)
Sequence.push_back(0);
else
if (CurSU)
ScheduleNodeBottomUp(CurSU, CurCycle);
++CurCycle;
}
@ -1152,9 +1150,7 @@ void ScheduleDAGRRList::ListScheduleTopDown() {
AvailableQueue->push_all(NotReady);
NotReady.clear();
if (!CurSU)
Sequence.push_back(0);
else
if (CurSU)
ScheduleNodeTopDown(CurSU, CurCycle);
++CurCycle;
}