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Rename some methods, use 'begin' instead of 'start', add new LiveInterval
iterator/begin/end members. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17930 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -76,6 +76,11 @@ namespace llvm {
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: reg(Reg), weight(Weight), NumValues(0) {
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}
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typedef Ranges::iterator iterator;
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iterator begin() { return ranges.begin(); }
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iterator end() { return ranges.end(); }
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void swap(LiveInterval& other) {
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std::swap(reg, other.reg);
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std::swap(weight, other.weight);
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@ -91,21 +96,21 @@ namespace llvm {
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bool empty() const { return ranges.empty(); }
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/// start - Return the lowest numbered slot covered by interval.
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unsigned start() const {
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/// beginNumber - Return the lowest numbered slot covered by interval.
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unsigned beginNumber() const {
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assert(!empty() && "empty interval for register");
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return ranges.front().start;
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}
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/// end - return the maximum point of the interval of the whole,
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/// endNumber - return the maximum point of the interval of the whole,
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/// exclusive.
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unsigned end() const {
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unsigned endNumber() const {
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assert(!empty() && "empty interval for register");
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return ranges.back().end;
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}
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bool expiredAt(unsigned index) const {
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return end() <= (index + 1);
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return endNumber() <= (index + 1);
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}
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bool liveAt(unsigned index) const;
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@ -142,7 +147,7 @@ namespace llvm {
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void removeRange(unsigned Start, unsigned End);
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bool operator<(const LiveInterval& other) const {
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return start() < other.start();
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return beginNumber() < other.beginNumber();
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}
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void dump() const;
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@ -76,6 +76,11 @@ namespace llvm {
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: reg(Reg), weight(Weight), NumValues(0) {
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}
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typedef Ranges::iterator iterator;
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iterator begin() { return ranges.begin(); }
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iterator end() { return ranges.end(); }
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void swap(LiveInterval& other) {
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std::swap(reg, other.reg);
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std::swap(weight, other.weight);
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@ -91,21 +96,21 @@ namespace llvm {
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bool empty() const { return ranges.empty(); }
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/// start - Return the lowest numbered slot covered by interval.
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unsigned start() const {
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/// beginNumber - Return the lowest numbered slot covered by interval.
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unsigned beginNumber() const {
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assert(!empty() && "empty interval for register");
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return ranges.front().start;
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}
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/// end - return the maximum point of the interval of the whole,
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/// endNumber - return the maximum point of the interval of the whole,
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/// exclusive.
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unsigned end() const {
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unsigned endNumber() const {
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assert(!empty() && "empty interval for register");
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return ranges.back().end;
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}
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bool expiredAt(unsigned index) const {
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return end() <= (index + 1);
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return endNumber() <= (index + 1);
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}
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bool liveAt(unsigned index) const;
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@ -142,7 +147,7 @@ namespace llvm {
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void removeRange(unsigned Start, unsigned End);
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bool operator<(const LiveInterval& other) const {
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return start() < other.start();
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return beginNumber() < other.beginNumber();
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}
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void dump() const;
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@ -270,7 +270,7 @@ void RA::processActiveIntervals(IntervalPtrs::value_type cur)
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unsigned reg = i->reg;
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// remove expired intervals
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if (i->expiredAt(cur->start())) {
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if (i->expiredAt(cur->beginNumber())) {
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DEBUG(std::cerr << "\t\tinterval " << *i << " expired\n");
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if (MRegisterInfo::isVirtualRegister(reg))
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reg = vrm_->getPhys(reg);
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@ -279,7 +279,7 @@ void RA::processActiveIntervals(IntervalPtrs::value_type cur)
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std::iter_swap(ii, --ie);
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}
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// move inactive intervals to inactive list
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else if (!i->liveAt(cur->start())) {
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else if (!i->liveAt(cur->beginNumber())) {
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DEBUG(std::cerr << "\t\tinterval " << *i << " inactive\n");
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if (MRegisterInfo::isVirtualRegister(reg))
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reg = vrm_->getPhys(reg);
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@ -305,13 +305,13 @@ void RA::processInactiveIntervals(IntervalPtrs::value_type cur)
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unsigned reg = i->reg;
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// remove expired intervals
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if (i->expiredAt(cur->start())) {
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if (i->expiredAt(cur->beginNumber())) {
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DEBUG(std::cerr << "\t\tinterval " << *i << " expired\n");
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// swap with last element and move end iterator back one position
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std::iter_swap(ii, --ie);
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}
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// move re-activated intervals in active list
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else if (i->liveAt(cur->start())) {
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else if (i->liveAt(cur->beginNumber())) {
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DEBUG(std::cerr << "\t\tinterval " << *i << " active\n");
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if (MRegisterInfo::isVirtualRegister(reg))
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reg = vrm_->getPhys(reg);
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@ -424,7 +424,7 @@ void RA::assignRegOrSpillAtInterval(IntervalPtrs::value_type cur)
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toSpill[minReg] = true;
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for (const unsigned* as = mri_->getAliasSet(minReg); *as; ++as)
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toSpill[*as] = true;
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unsigned earliestStart = cur->start();
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unsigned earliestStart = cur->beginNumber();
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std::set<unsigned> spilled;
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@ -29,7 +29,6 @@
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#include <cmath>
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#include <set>
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#include <queue>
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using namespace llvm;
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namespace {
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@ -45,7 +44,8 @@ namespace {
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const TargetMachine* tm_;
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const MRegisterInfo* mri_;
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LiveIntervals* li_;
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typedef std::vector<LiveInterval*> IntervalPtrs;
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typedef LiveInterval* IntervalPtr;
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typedef std::vector<IntervalPtr> IntervalPtrs;
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IntervalPtrs handled_, fixed_, active_, inactive_;
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typedef std::priority_queue<LiveInterval*,
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IntervalPtrs,
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@ -231,13 +231,14 @@ void RA::initIntervalSets()
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void RA::processActiveIntervals(IntervalPtrs::value_type cur)
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{
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DEBUG(std::cerr << "\tprocessing active intervals:\n");
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IntervalPtrs::iterator ii = active_.begin(), ie = active_.end();
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while (ii != ie) {
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LiveInterval* i = *ii;
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unsigned reg = i->reg;
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// remove expired intervals
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if (i->expiredAt(cur->start())) {
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if (i->expiredAt(cur->beginNumber())) {
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DEBUG(std::cerr << "\t\tinterval " << *i << " expired\n");
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if (MRegisterInfo::isVirtualRegister(reg))
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reg = vrm_->getPhys(reg);
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@ -246,7 +247,7 @@ void RA::processActiveIntervals(IntervalPtrs::value_type cur)
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std::iter_swap(ii, --ie);
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}
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// move inactive intervals to inactive list
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else if (!i->liveAt(cur->start())) {
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else if (!i->liveAt(cur->beginNumber())) {
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DEBUG(std::cerr << "\t\tinterval " << *i << " inactive\n");
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if (MRegisterInfo::isVirtualRegister(reg))
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reg = vrm_->getPhys(reg);
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@ -267,18 +268,19 @@ void RA::processInactiveIntervals(IntervalPtrs::value_type cur)
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{
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DEBUG(std::cerr << "\tprocessing inactive intervals:\n");
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IntervalPtrs::iterator ii = inactive_.begin(), ie = inactive_.end();
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while (ii != ie) {
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LiveInterval* i = *ii;
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unsigned reg = i->reg;
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// remove expired intervals
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if (i->expiredAt(cur->start())) {
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if (i->expiredAt(cur->beginNumber())) {
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DEBUG(std::cerr << "\t\tinterval " << *i << " expired\n");
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// swap with last element and move end iterator back one position
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std::iter_swap(ii, --ie);
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}
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// move re-activated intervals in active list
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else if (i->liveAt(cur->start())) {
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else if (i->liveAt(cur->beginNumber())) {
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DEBUG(std::cerr << "\t\tinterval " << *i << " active\n");
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if (MRegisterInfo::isVirtualRegister(reg))
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reg = vrm_->getPhys(reg);
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@ -413,7 +415,7 @@ void RA::assignRegOrStackSlotAtInterval(LiveInterval* cur)
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// the earliest start of a spilled interval indicates up to where
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// in handled we need to roll back
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unsigned earliestStart = cur->start();
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unsigned earliestStart = cur->beginNumber();
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// set of spilled vregs (used later to rollback properly)
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std::set<unsigned> spilled;
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@ -431,7 +433,7 @@ void RA::assignRegOrStackSlotAtInterval(LiveInterval* cur)
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toSpill[vrm_->getPhys(reg)] &&
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cur->overlaps(**i)) {
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DEBUG(std::cerr << "\t\t\tspilling(a): " << **i << '\n');
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earliestStart = std::min(earliestStart, (*i)->start());
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earliestStart = std::min(earliestStart, (*i)->beginNumber());
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int slot = vrm_->assignVirt2StackSlot((*i)->reg);
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std::vector<LiveInterval*> newIs =
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li_->addIntervalsForSpills(**i, *vrm_, slot);
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@ -446,7 +448,7 @@ void RA::assignRegOrStackSlotAtInterval(LiveInterval* cur)
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toSpill[vrm_->getPhys(reg)] &&
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cur->overlaps(**i)) {
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DEBUG(std::cerr << "\t\t\tspilling(i): " << **i << '\n');
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earliestStart = std::min(earliestStart, (*i)->start());
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earliestStart = std::min(earliestStart, (*i)->beginNumber());
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int slot = vrm_->assignVirt2StackSlot((*i)->reg);
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std::vector<LiveInterval*> newIs =
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li_->addIntervalsForSpills(**i, *vrm_, slot);
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@ -462,7 +464,7 @@ void RA::assignRegOrStackSlotAtInterval(LiveInterval* cur)
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while (!handled_.empty()) {
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LiveInterval* i = handled_.back();
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// if this interval starts before t we are done
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if (i->start() < earliestStart)
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if (i->beginNumber() < earliestStart)
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break;
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DEBUG(std::cerr << "\t\t\tundo changes for: " << *i << '\n');
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handled_.pop_back();
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@ -505,7 +507,7 @@ void RA::assignRegOrStackSlotAtInterval(LiveInterval* cur)
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// put it in inactive if required)
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for (IntervalPtrs::iterator i = handled_.begin(), e = handled_.end();
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i != e; ++i) {
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if (!(*i)->expiredAt(earliestStart) && (*i)->expiredAt(cur->start())) {
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if (!(*i)->expiredAt(earliestStart) && (*i)->expiredAt(cur->beginNumber())){
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DEBUG(std::cerr << "\t\t\tundo changes for: " << **i << '\n');
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active_.push_back(*i);
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if (MRegisterInfo::isPhysicalRegister((*i)->reg))
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