From 9763e2bf39b84f18bd464b0cda61fe1cd98dcaae Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Wed, 2 Mar 2011 00:06:15 +0000 Subject: 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 --- lib/CodeGen/LiveInterval.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'lib/CodeGen/LiveInterval.cpp') diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp index c2dbd6ab75..a37296f77b 100644 --- a/lib/CodeGen/LiveInterval.cpp +++ b/lib/CodeGen/LiveInterval.cpp @@ -291,6 +291,22 @@ LiveInterval::addRangeFrom(LiveRange LR, iterator From) { 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. -- cgit v1.2.3-70-g09d2