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Add an optional parameter with a list of undefs to extendToIndices
Reapply r280268, hopefully in a version that MSVC likes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280358 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -164,14 +164,23 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
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void shrinkToUses(LiveInterval::SubRange &SR, unsigned Reg);
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/// Extend the live range @p LR to reach all points in @p Indices. The
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/// points in the @p Indices array must be jointly dominated by existing
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/// defs in @p LR. PHI-defs are added as needed to maintain SSA form.
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/// points in the @p Indices array must be jointly dominated by the union
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/// of the existing defs in @p LR and points in @p Undefs.
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///
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/// PHI-defs are added as needed to maintain SSA form.
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///
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/// If a SlotIndex in @p Indices is the end index of a basic block, @p LR
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/// will be extended to be live out of the basic block.
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/// If a SlotIndex in @p Indices is jointy dominated only by points in
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/// @p Undefs, the live range will not be extended to that point.
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///
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/// See also LiveRangeCalc::extend().
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void extendToIndices(LiveRange &LR, ArrayRef<SlotIndex> Indices);
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void extendToIndices(LiveRange &LR, ArrayRef<SlotIndex> Indices,
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ArrayRef<SlotIndex> Undefs);
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void extendToIndices(LiveRange &LR, ArrayRef<SlotIndex> Indices) {
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extendToIndices(LR, Indices, /*Undefs=*/{});
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}
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/// If @p LR has a live value at @p Kill, prune its live range by removing
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/// any liveness reachable from Kill. Add live range end points to
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@ -568,11 +568,12 @@ void LiveIntervals::shrinkToUses(LiveInterval::SubRange &SR, unsigned Reg) {
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}
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void LiveIntervals::extendToIndices(LiveRange &LR,
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ArrayRef<SlotIndex> Indices) {
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ArrayRef<SlotIndex> Indices,
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ArrayRef<SlotIndex> Undefs) {
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assert(LRCalc && "LRCalc not initialized.");
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LRCalc->reset(MF, getSlotIndexes(), DomTree, &getVNInfoAllocator());
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for (unsigned i = 0, e = Indices.size(); i != e; ++i)
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LRCalc->extend(LR, Indices[i], /*PhysReg=*/0, /*Undefs=*/{});
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LRCalc->extend(LR, Indices[i], /*PhysReg=*/0, Undefs);
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}
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void LiveIntervals::pruneValue(LiveRange &LR, SlotIndex Kill,
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