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Assign indices to empty basic blocks. This will be necessary for StrongPHIElimination in the near future.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52300 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -100,11 +100,14 @@ void LiveIntervals::computeNumbering() {
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i2miMap_.push_back(I);
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MIIndex += InstrSlots::NUM;
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}
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if (StartIdx == MIIndex) {
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// Empty MBB
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MIIndex += InstrSlots::NUM;
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i2miMap_.push_back(0);
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}
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// Set the MBB2IdxMap entry for this MBB.
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MBB2IdxMap[MBB->getNumber()] = (StartIdx == MIIndex)
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? std::make_pair(StartIdx, StartIdx) // Empty MBB
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: std::make_pair(StartIdx, MIIndex - 1);
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MBB2IdxMap[MBB->getNumber()] = std::make_pair(StartIdx, MIIndex - 1);
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Idx2MBBMap.push_back(std::make_pair(StartIdx, MBB));
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}
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std::sort(Idx2MBBMap.begin(), Idx2MBBMap.end(), Idx2MBBCompare());
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@ -661,6 +664,8 @@ void LiveIntervals::computeIntervals() {
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MIIndex += InstrSlots::NUM;
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}
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if (MBB->begin() == miEnd) MIIndex += InstrSlots::NUM; // Empty MBB
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}
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}
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