Stop precomputing last split points, query the SplitAnalysis cache on demand.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128875 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index 3974cb3..0b59a28 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -151,12 +151,6 @@
SlotIndex Start, Stop;
tie(Start, Stop) = LIS.getSlotIndexes()->getMBBRange(BI.MBB);
- // The last split point is the latest possible insertion point that dominates
- // all successor blocks. If interference reaches LastSplitPoint, it is not
- // possible to insert a split or reload that makes CurLI live in the
- // outgoing bundle.
- BI.LastSplitPoint = getLastSplitPoint(BI.MBB->getNumber());
-
// LVI is the first live segment overlapping MBB.
BI.LiveIn = LVI->start <= Start;
if (!BI.LiveIn)
@@ -947,13 +941,14 @@
continue;
openIntv();
+ SlotIndex LastSplitPoint = SA.getLastSplitPoint(BI.MBB->getNumber());
SlotIndex SegStart = enterIntvBefore(std::min(BI.FirstUse,
- BI.LastSplitPoint));
- if (!BI.LiveOut || BI.LastUse < BI.LastSplitPoint) {
+ LastSplitPoint));
+ if (!BI.LiveOut || BI.LastUse < LastSplitPoint) {
useIntv(SegStart, leaveIntvAfter(BI.LastUse));
} else {
// The last use is after the last valid split point.
- SlotIndex SegStop = leaveIntvBefore(BI.LastSplitPoint);
+ SlotIndex SegStop = leaveIntvBefore(LastSplitPoint);
useIntv(SegStart, SegStop);
overlapIntv(SegStop, BI.LastUse);
}