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LiveInterval: Use more range based for loops for value numbers and segments.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223978 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun 2014-12-10 23:07:54 +00:00
parent 1e9d355499
commit 218d20a48b
8 changed files with 67 additions and 90 deletions
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16
include/llvm/CodeGen/LiveInterval.h
View File

@ -218,14 +218,12 @@ namespace llvm {
/// another LiveRange.
LiveRange(const LiveRange &Other, BumpPtrAllocator &Allocator) {
// Duplicate valnos.
for (LiveRange::const_vni_iterator I = Other.vni_begin(),
E = Other.vni_end(); I != E; ++I) {
createValueCopy(*I, Allocator);
for (const VNInfo *VNI : Other.valnos) {
createValueCopy(VNI, Allocator);
}
// Now we can copy segments and remap their valnos.
for (LiveRange::const_iterator I = Other.begin(), E = Other.end();
I != E; ++I) {
segments.push_back(Segment(I->start, I->end, valnos[I->valno->id]));
for (const Segment &S : Other.segments) {
segments.push_back(Segment(S.start, S.end, valnos[S.valno->id]));
}
}
@ -523,9 +521,9 @@ namespace llvm {
/// Returns true if the live range is zero length, i.e. no live segments
/// span instructions. It doesn't pay to spill such a range.
bool isZeroLength(SlotIndexes *Indexes) const {
for (const_iterator i = begin(), e = end(); i != e; ++i)
if (Indexes->getNextNonNullIndex(i->start).getBaseIndex() <
i->end.getBaseIndex())
for (const Segment &S : segments)
if (Indexes->getNextNonNullIndex(S.start).getBaseIndex() <
S.end.getBaseIndex())
return false;
return true;
}

54
lib/CodeGen/LiveInterval.cpp
View File

@ -191,13 +191,13 @@ bool LiveRange::covers(const LiveRange &Other) const {
return Other.empty();
const_iterator I = begin();
for (const_iterator O = Other.begin(), OE = Other.end(); O != OE; ++O) {
I = advanceTo(I, O->start);
if (I == end() || I->start > O->start)
for (const Segment &O : Other.segments) {
I = advanceTo(I, O.start);
if (I == end() || I->start > O.start)
return false;
// Check adjacent live segments and see if we can get behind O->end.
while (I->end < O->end) {
// Check adjacent live segments and see if we can get behind O.end.
while (I->end < O.end) {
const_iterator Last = I;
// Get next segment and abort if it was not adjacent.
++I;
@ -226,8 +226,8 @@ void LiveRange::markValNoForDeletion(VNInfo *ValNo) {
void LiveRange::RenumberValues() {
SmallPtrSet<VNInfo*, 8> Seen;
valnos.clear();
for (const_iterator I = begin(), E = end(); I != E; ++I) {
VNInfo *VNI = I->valno;
for (const Segment &S : segments) {
VNInfo *VNI = S.valno;
if (!Seen.insert(VNI).second)
continue;
assert(!VNI->isUnused() && "Unused valno used by live segment");
@ -483,8 +483,8 @@ void LiveRange::join(LiveRange &Other,
// This can leave Other in an invalid state because we're not coalescing
// touching segments that now have identical values. That's OK since Other is
// not supposed to be valid after calling join();
for (iterator I = Other.begin(), E = Other.end(); I != E; ++I)
I->valno = NewVNInfo[RHSValNoAssignments[I->valno->id]];
for (Segment &S : Other.segments)
S.valno = NewVNInfo[RHSValNoAssignments[S.valno->id]];
// Update val# info. Renumber them and make sure they all belong to this
// LiveRange now. Also remove dead val#'s.
@ -504,8 +504,8 @@ void LiveRange::join(LiveRange &Other,
// Okay, now insert the RHS live segments into the LHS.
LiveRangeUpdater Updater(this);
for (iterator I = Other.begin(), E = Other.end(); I != E; ++I)
Updater.add(*I);
for (Segment &S : Other.segments)
Updater.add(S);
}
/// Merge all of the segments in RHS into this live range as the specified
@ -515,8 +515,8 @@ void LiveRange::join(LiveRange &Other,
void LiveRange::MergeSegmentsInAsValue(const LiveRange &RHS,
VNInfo *LHSValNo) {
LiveRangeUpdater Updater(this);
for (const_iterator I = RHS.begin(), E = RHS.end(); I != E; ++I)
Updater.add(I->start, I->end, LHSValNo);
for (const Segment &S : RHS.segments)
Updater.add(S.start, S.end, LHSValNo);
}
/// MergeValueInAsValue - Merge all of the live segments of a specific val#
@ -528,9 +528,9 @@ void LiveRange::MergeValueInAsValue(const LiveRange &RHS,
const VNInfo *RHSValNo,
VNInfo *LHSValNo) {
LiveRangeUpdater Updater(this);
for (const_iterator I = RHS.begin(), E = RHS.end(); I != E; ++I)
if (I->valno == RHSValNo)
Updater.add(I->start, I->end, LHSValNo);
for (const Segment &S : RHS.segments)
if (S.valno == RHSValNo)
Updater.add(S.start, S.end, LHSValNo);
}
/// MergeValueNumberInto - This method is called when two value nubmers
@ -611,8 +611,8 @@ void LiveInterval::removeEmptySubRanges() {
unsigned LiveInterval::getSize() const {
unsigned Sum = 0;
for (const_iterator I = begin(), E = end(); I != E; ++I)
Sum += I->start.distance(I->end);
for (const Segment &S : segments)
Sum += S.start.distance(S.end);
return Sum;
}
@ -630,9 +630,9 @@ void LiveRange::print(raw_ostream &OS) const {
if (empty())
OS << "EMPTY";
else {
for (const_iterator I = begin(), E = end(); I != E; ++I) {
OS << *I;
assert(I->valno == getValNumInfo(I->valno->id) && "Bad VNInfo");
for (const Segment &S : segments) {
OS << S;
assert(S.valno == getValNumInfo(S.valno->id) && "Bad VNInfo");
}
}
@ -757,14 +757,14 @@ void LiveRangeUpdater::print(raw_ostream &OS) const {
OS << " updater with gap = " << (ReadI - WriteI)
<< ", last start = " << LastStart
<< ":\n Area 1:";
for (LiveRange::const_iterator I = LR->begin(); I != WriteI; ++I)
OS << ' ' << *I;
for (const auto &S : make_range(LR->begin(), WriteI))
OS << ' ' << S;
OS << "\n Spills:";
for (unsigned I = 0, E = Spills.size(); I != E; ++I)
OS << ' ' << Spills[I];
OS << "\n Area 2:";
for (LiveRange::const_iterator I = ReadI, E = LR->end(); I != E; ++I)
OS << ' ' << *I;
for (const auto &S : make_range(ReadI, LR->end()))
OS << ' ' << S;
OS << '\n';
}
@ -925,9 +925,7 @@ unsigned ConnectedVNInfoEqClasses::Classify(const LiveInterval *LI) {
const VNInfo *used = nullptr, *unused = nullptr;
// Determine connections.
for (LiveInterval::const_vni_iterator I = LI->vni_begin(), E = LI->vni_end();
I != E; ++I) {
const VNInfo *VNI = *I;
for (const VNInfo *VNI : LI->valnos) {
// Group all unused values into one class.
if (VNI->isUnused()) {
if (unused)

6
lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -449,7 +449,7 @@ void LiveIntervals::computeDeadValues(LiveRange &Segments, LiveRange &LR,
bool *CanSeparateRes, unsigned Reg,
SmallVectorImpl<MachineInstr*> *dead) {
bool CanSeparate = false;
for (auto VNI : make_range(LR.vni_begin(), LR.vni_end())) {
for (auto VNI : LR.valnos) {
if (VNI->isUnused())
continue;
LiveRange::iterator LRI = Segments.FindSegmentContaining(VNI->def);
@ -729,9 +729,7 @@ LiveIntervals::intervalIsInOneMBB(const LiveInterval &LI) const {
bool
LiveIntervals::hasPHIKill(const LiveInterval &LI, const VNInfo *VNI) const {
for (LiveInterval::const_vni_iterator I = LI.vni_begin(), E = LI.vni_end();
I != E; ++I) {
const VNInfo *PHI = *I;
for (const VNInfo *PHI : LI.valnos) {
if (PHI->isUnused() || !PHI->isPHIDef())
continue;
const MachineBasicBlock *PHIMBB = getMBBFromIndex(PHI->def);

4
lib/CodeGen/LiveRangeEdit.cpp
View File

@ -60,9 +60,7 @@ bool LiveRangeEdit::checkRematerializable(VNInfo *VNI,
}
void LiveRangeEdit::scanRemattable(AliasAnalysis *aa) {
for (LiveInterval::vni_iterator I = getParent().vni_begin(),
E = getParent().vni_end(); I != E; ++I) {
VNInfo *VNI = *I;
for (VNInfo *VNI : getParent().valnos) {
if (VNI->isUnused())
continue;
MachineInstr *DefMI = LIS.getInstructionFromIndex(VNI->def);

5
lib/CodeGen/MachineVerifier.cpp
View File

@ -1643,9 +1643,8 @@ void MachineVerifier::verifyLiveRangeSegment(const LiveRange &LR,
void MachineVerifier::verifyLiveRange(const LiveRange &LR, unsigned Reg,
unsigned LaneMask) {
for (LiveRange::const_vni_iterator I = LR.vni_begin(), E = LR.vni_end();
I != E; ++I)
verifyLiveRangeValue(LR, *I, Reg, LaneMask);
for (const VNInfo *VNI : LR.valnos)
verifyLiveRangeValue(LR, VNI, Reg, LaneMask);
for (LiveRange::const_iterator I = LR.begin(), E = LR.end(); I != E; ++I)
verifyLiveRangeSegment(LR, I, Reg, LaneMask);

19
lib/CodeGen/RegisterCoalescer.cpp
View File

@ -554,19 +554,18 @@ bool RegisterCoalescer::hasOtherReachingDefs(LiveInterval &IntA,
if (LIS->hasPHIKill(IntA, AValNo))
return true;
for (LiveInterval::iterator AI = IntA.begin(), AE = IntA.end();
AI != AE; ++AI) {
if (AI->valno != AValNo) continue;
for (LiveRange::Segment &ASeg : IntA.segments) {
if (ASeg.valno != AValNo) continue;
LiveInterval::iterator BI =
std::upper_bound(IntB.begin(), IntB.end(), AI->start);
std::upper_bound(IntB.begin(), IntB.end(), ASeg.start);
if (BI != IntB.begin())
--BI;
for (; BI != IntB.end() && AI->end >= BI->start; ++BI) {
for (; BI != IntB.end() && ASeg.end >= BI->start; ++BI) {
if (BI->valno == BValNo)
continue;
if (BI->start <= AI->start && BI->end > AI->start)
if (BI->start <= ASeg.start && BI->end > ASeg.start)
return true;
if (BI->start > AI->start && BI->start < AI->end)
if (BI->start > ASeg.start && BI->start < ASeg.end)
return true;
}
}
@ -578,10 +577,10 @@ bool RegisterCoalescer::hasOtherReachingDefs(LiveInterval &IntA,
static void addSegmentsWithValNo(LiveRange &Dst, VNInfo *DstValNo,
const LiveRange &Src, const VNInfo *SrcValNo)
{
for (LiveRange::const_iterator I = Src.begin(), E = Src.end(); I != E; ++I) {
if (I->valno != SrcValNo)
for (const LiveRange::Segment &S : Src.segments) {
if (S.valno != SrcValNo)
continue;
Dst.addSegment(LiveRange::Segment(I->start, I->end, DstValNo));
Dst.addSegment(LiveRange::Segment(S.start, S.end, DstValNo));
}
}

43
lib/CodeGen/SplitKit.cpp
View File

@ -120,10 +120,9 @@ void SplitAnalysis::analyzeUses() {
// First get all the defs from the interval values. This provides the correct
// slots for early clobbers.
for (LiveInterval::const_vni_iterator I = CurLI->vni_begin(),
E = CurLI->vni_end(); I != E; ++I)
if (!(*I)->isPHIDef() && !(*I)->isUnused())
UseSlots.push_back((*I)->def);
for (const VNInfo *VNI : CurLI->valnos)
if (!VNI->isPHIDef() && !VNI->isUnused())
UseSlots.push_back(VNI->def);
// Get use slots form the use-def chain.
const MachineRegisterInfo &MRI = MF.getRegInfo();
@ -727,9 +726,7 @@ void SplitEditor::hoistCopiesForSize() {
// Find the nearest common dominator for parent values with multiple
// back-copies. If a single back-copy dominates, put it in DomPair.second.
for (LiveInterval::vni_iterator VI = LI->vni_begin(), VE = LI->vni_end();
VI != VE; ++VI) {
VNInfo *VNI = *VI;
for (VNInfo *VNI : LI->valnos) {
if (VNI->isUnused())
continue;
VNInfo *ParentVNI = Edit->getParent().getVNInfoAt(VNI->def);
@ -802,9 +799,7 @@ void SplitEditor::hoistCopiesForSize() {
// Remove redundant back-copies that are now known to be dominated by another
// def with the same value.
SmallVector<VNInfo*, 8> BackCopies;
for (LiveInterval::vni_iterator VI = LI->vni_begin(), VE = LI->vni_end();
VI != VE; ++VI) {
VNInfo *VNI = *VI;
for (VNInfo *VNI : LI->valnos) {
if (VNI->isUnused())
continue;
VNInfo *ParentVNI = Edit->getParent().getVNInfoAt(VNI->def);
@ -823,16 +818,15 @@ void SplitEditor::hoistCopiesForSize() {
bool SplitEditor::transferValues() {
bool Skipped = false;
RegAssignMap::const_iterator AssignI = RegAssign.begin();
for (LiveInterval::const_iterator ParentI = Edit->getParent().begin(),
ParentE = Edit->getParent().end(); ParentI != ParentE; ++ParentI) {
DEBUG(dbgs() << " blit " << *ParentI << ':');
VNInfo *ParentVNI = ParentI->valno;
for (const LiveRange::Segment &S : Edit->getParent()) {
DEBUG(dbgs() << " blit " << S << ':');
VNInfo *ParentVNI = S.valno;
// RegAssign has holes where RegIdx 0 should be used.
SlotIndex Start = ParentI->start;
SlotIndex Start = S.start;
AssignI.advanceTo(Start);
do {
unsigned RegIdx;
SlotIndex End = ParentI->end;
SlotIndex End = S.end;
if (!AssignI.valid()) {
RegIdx = 0;
} else if (AssignI.start() <= Start) {
@ -917,7 +911,7 @@ bool SplitEditor::transferValues() {
++MBB;
}
Start = End;
} while (Start != ParentI->end);
} while (Start != S.end);
DEBUG(dbgs() << '\n');
}
@ -930,9 +924,7 @@ bool SplitEditor::transferValues() {
void SplitEditor::extendPHIKillRanges() {
// Extend live ranges to be live-out for successor PHI values.
for (LiveInterval::const_vni_iterator I = Edit->getParent().vni_begin(),
E = Edit->getParent().vni_end(); I != E; ++I) {
const VNInfo *PHIVNI = *I;
for (const VNInfo *PHIVNI : Edit->getParent().valnos) {
if (PHIVNI->isUnused() || !PHIVNI->isPHIDef())
continue;
unsigned RegIdx = RegAssign.lookup(PHIVNI->def);
@ -1006,12 +998,11 @@ void SplitEditor::deleteRematVictims() {
SmallVector<MachineInstr*, 8> Dead;
for (LiveRangeEdit::iterator I = Edit->begin(), E = Edit->end(); I != E; ++I){
LiveInterval *LI = &LIS.getInterval(*I);
for (LiveInterval::const_iterator LII = LI->begin(), LIE = LI->end();
LII != LIE; ++LII) {
for (const LiveRange::Segment &S : LI->segments) {
// Dead defs end at the dead slot.
if (LII->end != LII->valno->def.getDeadSlot())
if (S.end != S.valno->def.getDeadSlot())
continue;
MachineInstr *MI = LIS.getInstructionFromIndex(LII->valno->def);
MachineInstr *MI = LIS.getInstructionFromIndex(S.valno->def);
assert(MI && "Missing instruction for dead def");
MI->addRegisterDead(LI->reg, &TRI);
@ -1036,9 +1027,7 @@ void SplitEditor::finish(SmallVectorImpl<unsigned> *LRMap) {
// the inserted copies.
// Add the original defs from the parent interval.
for (LiveInterval::const_vni_iterator I = Edit->getParent().vni_begin(),
E = Edit->getParent().vni_end(); I != E; ++I) {
const VNInfo *ParentVNI = *I;
for (const VNInfo *ParentVNI : Edit->getParent().valnos) {
if (ParentVNI->isUnused())
continue;
unsigned RegIdx = RegAssign.lookup(ParentVNI->def);

10
lib/CodeGen/VirtRegMap.cpp
View File

@ -255,9 +255,8 @@ void VirtRegRewriter::addMBBLiveIns() {
if (LI.hasSubRanges()) {
for (LiveInterval::subrange_iterator S = LI.subrange_begin(),
SE = LI.subrange_end(); S != SE; ++S) {
for (LiveRange::const_iterator I = S->begin(), E = S->end(); I != E;
++I) {
if (!Indexes->findLiveInMBBs(I->start, I->end, LiveIn))
for (const auto &Seg : S->segments) {
if (!Indexes->findLiveInMBBs(Seg.start, Seg.end, LiveIn))
continue;
for (MCSubRegIndexIterator SR(PhysReg, TRI); SR.isValid(); ++SR) {
unsigned SubReg = SR.getSubReg();
@ -275,9 +274,8 @@ void VirtRegRewriter::addMBBLiveIns() {
}
} else {
// Scan the segments of LI.
for (LiveInterval::const_iterator I = LI.begin(), E = LI.end(); I != E;
++I) {
if (!Indexes->findLiveInMBBs(I->start, I->end, LiveIn))
for (const auto &Seg : LI.segments) {
if (!Indexes->findLiveInMBBs(Seg.start, Seg.end, LiveIn))
continue;
for (unsigned i = 0, e = LiveIn.size(); i != e; ++i)
if (!LiveIn[i]->isLiveIn(PhysReg))