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Represent RegUnit liveness with LiveRange instance

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Previously LiveInterval has been used, but having a spill weight and
register number is unnecessary for a register unit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192397 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun
2013-10-10 21:29:02 +00:00
parent e25dde550b
commit 4f3b5e8c92
13 changed files with 132 additions and 129 deletions
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18
lib/CodeGen/LiveDebugVariables.cpp
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@ -220,13 +220,13 @@ public:
/// End points where VNI is no longer live are added to Kills.
/// @param Idx Starting point for the definition.
/// @param LocNo Location number to propagate.
/// @param LI Restrict liveness to where LI has the value VNI. May be null.
/// @param VNI When LI is not null, this is the value to restrict to.
/// @param LR Restrict liveness to where LR has the value VNI. May be null.
/// @param VNI When LR is not null, this is the value to restrict to.
/// @param Kills Append end points of VNI's live range to Kills.
/// @param LIS Live intervals analysis.
/// @param MDT Dominator tree.
void extendDef(SlotIndex Idx, unsigned LocNo,
LiveInterval *LI, const VNInfo *VNI,
LiveRange *LR, const VNInfo *VNI,
SmallVectorImpl<SlotIndex> *Kills,
LiveIntervals &LIS, MachineDominatorTree &MDT,
UserValueScopes &UVS);
@ -495,7 +495,7 @@ bool LDVImpl::collectDebugValues(MachineFunction &mf) {
}
void UserValue::extendDef(SlotIndex Idx, unsigned LocNo,
LiveInterval *LI, const VNInfo *VNI,
LiveRange *LR, const VNInfo *VNI,
SmallVectorImpl<SlotIndex> *Kills,
LiveIntervals &LIS, MachineDominatorTree &MDT,
UserValueScopes &UVS) {
@ -509,8 +509,8 @@ void UserValue::extendDef(SlotIndex Idx, unsigned LocNo,
// Limit to VNI's live range.
bool ToEnd = true;
if (LI && VNI) {
LiveInterval::Segment *Segment = LI->getSegmentContaining(Start);
if (LR && VNI) {
LiveInterval::Segment *Segment = LR->getSegmentContaining(Start);
if (!Segment || Segment->valno != VNI) {
if (Kills)
Kills->push_back(Start);
@ -669,10 +669,10 @@ UserValue::computeIntervals(MachineRegisterInfo &MRI,
// For physregs, use the live range of the first regunit as a guide.
unsigned Unit = *MCRegUnitIterator(Loc.getReg(), &TRI);
LiveInterval *LI = &LIS.getRegUnit(Unit);
const VNInfo *VNI = LI->getVNInfoAt(Idx);
LiveRange *LR = &LIS.getRegUnit(Unit);
const VNInfo *VNI = LR->getVNInfoAt(Idx);
// Don't track copies from physregs, it is too expensive.
extendDef(Idx, LocNo, LI, VNI, 0, LIS, MDT, UVS);
extendDef(Idx, LocNo, LR, VNI, 0, LIS, MDT, UVS);
}
// Finally, erase all the undefs.