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authorOwen Anderson <resistor@mac.com>2008-06-05 17:15:43 +0000
committerOwen Anderson <resistor@mac.com>2008-06-05 17:15:43 +0000
commit7399f22868d17689ed5e3c6806808998b9963d93 (patch)
tree3bcfd065eef0bcbe4eb31f1537b1c5049c92f0ae /lib
parent74e1ff5eacc54988d1dcf0935c3901300e07cd3c (diff)
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Add a helper for constructing new live ranges that ended from an instruction to the end of its MBB.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52012 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r--lib/CodeGen/LiveIntervalAnalysis.cpp15
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index f184191..053e4d2 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -1830,3 +1830,18 @@ void LiveIntervals::spillPhysRegAroundRegDefsUses(const LiveInterval &li,
}
}
}
+
+LiveRange LiveIntervals::addLiveRangeToEndOfBlock(unsigned reg,
+ MachineInstr* startInst) {
+ LiveInterval& Interval = getOrCreateInterval(reg);
+ VNInfo* VN = Interval.getNextValue(
+ getInstructionIndex(startInst) + InstrSlots::DEF,
+ startInst, getVNInfoAllocator());
+ VN->hasPHIKill = true;
+ VN->kills.push_back(getMBBEndIdx(startInst->getParent()));
+ LiveRange LR(getInstructionIndex(startInst) + InstrSlots::DEF,
+ getMBBEndIdx(startInst->getParent()) + 1, VN);
+ Interval.addRange(LR);
+
+ return LR;
+}