Move LiveIntervalMap::extendTo into LiveInterval itself.
This method could probably be used by LiveIntervalAnalysis::shrinkToUses, and
now it can use extendIntervalEndTo() which coalesces ranges.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126803 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp
index c2dbd6a..a37296f 100644
--- a/lib/CodeGen/LiveInterval.cpp
+++ b/lib/CodeGen/LiveInterval.cpp
@@ -291,6 +291,22 @@
return ranges.insert(it, LR);
}
+/// extendInBlock - If this interval is live before UseIdx in the basic
+/// block that starts at StartIdx, extend it to be live at UseIdx and return
+/// the value. If there is no live range before UseIdx, return NULL.
+VNInfo *LiveInterval::extendInBlock(SlotIndex StartIdx, SlotIndex UseIdx) {
+ if (empty())
+ return 0;
+ iterator I = std::upper_bound(begin(), end(), UseIdx);
+ if (I == begin())
+ return 0;
+ --I;
+ if (I->end <= StartIdx)
+ return 0;
+ if (I->end <= UseIdx)
+ extendIntervalEndTo(I, UseIdx.getNextSlot());
+ return I->valno;
+}
/// removeRange - Remove the specified range from this interval. Note that
/// the range must be in a single LiveRange in its entirety.