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Add an optional parameter with a list of undefs to extendToIndices

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Reapply r280268, hopefully in a version that MSVC likes.

llvm-svn: 280358
This commit is contained in:
Krzysztof Parzyszek 2016-09-01 12:10:36 +00:00
parent 4993c81205
commit d1066659ab
2 changed files with 15 additions and 5 deletions
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15
include/llvm/CodeGen/LiveIntervalAnalysis.h
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@ -164,14 +164,23 @@ extern cl::opt<bool> UseSegmentSetForPhysRegs;
void shrinkToUses(LiveInterval::SubRange &SR, unsigned Reg); void shrinkToUses(LiveInterval::SubRange &SR, unsigned Reg);
/// Extend the live range @p LR to reach all points in @p Indices. The /// Extend the live range @p LR to reach all points in @p Indices. The
/// points in the @p Indices array must be jointly dominated by existing /// points in the @p Indices array must be jointly dominated by the union
/// defs in @p LR. PHI-defs are added as needed to maintain SSA form. /// of the existing defs in @p LR and points in @p Undefs.
///
/// PHI-defs are added as needed to maintain SSA form.
/// ///
/// If a SlotIndex in @p Indices is the end index of a basic block, @p LR /// If a SlotIndex in @p Indices is the end index of a basic block, @p LR
/// will be extended to be live out of the basic block. /// will be extended to be live out of the basic block.
/// If a SlotIndex in @p Indices is jointy dominated only by points in
/// @p Undefs, the live range will not be extended to that point.
/// ///
/// See also LiveRangeCalc::extend(). /// See also LiveRangeCalc::extend().
void extendToIndices(LiveRange &LR, ArrayRef<SlotIndex> Indices); void extendToIndices(LiveRange &LR, ArrayRef<SlotIndex> Indices,
ArrayRef<SlotIndex> Undefs);
void extendToIndices(LiveRange &LR, ArrayRef<SlotIndex> Indices) {
extendToIndices(LR, Indices, /*Undefs=*/{});
}
/// If @p LR has a live value at @p Kill, prune its live range by removing /// If @p LR has a live value at @p Kill, prune its live range by removing
/// any liveness reachable from Kill. Add live range end points to /// any liveness reachable from Kill. Add live range end points to

5
lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -568,11 +568,12 @@ void LiveIntervals::shrinkToUses(LiveInterval::SubRange &SR, unsigned Reg) {
} }
void LiveIntervals::extendToIndices(LiveRange &LR, void LiveIntervals::extendToIndices(LiveRange &LR,
ArrayRef<SlotIndex> Indices) { ArrayRef<SlotIndex> Indices,
ArrayRef<SlotIndex> Undefs) {
assert(LRCalc && "LRCalc not initialized."); assert(LRCalc && "LRCalc not initialized.");
LRCalc->reset(MF, getSlotIndexes(), DomTree, &getVNInfoAllocator()); LRCalc->reset(MF, getSlotIndexes(), DomTree, &getVNInfoAllocator());
for (unsigned i = 0, e = Indices.size(); i != e; ++i) for (unsigned i = 0, e = Indices.size(); i != e; ++i)
LRCalc->extend(LR, Indices[i], /*PhysReg=*/0, /*Undefs=*/{}); LRCalc->extend(LR, Indices[i], /*PhysReg=*/0, Undefs);
} }
void LiveIntervals::pruneValue(LiveRange &LR, SlotIndex Kill, void LiveIntervals::pruneValue(LiveRange &LR, SlotIndex Kill,