From 59753fb9c177f7e4bd574a7bf0fe79aedbf3f9cb Mon Sep 17 00:00:00 2001 From: dcarney Date: Wed, 10 Dec 2014 03:48:28 -0800 Subject: [PATCH] [turbofan] update register allocator with auto, nullptr and ZoneVector BUG= Review URL: https://codereview.chromium.org/789083005 Cr-Commit-Position: refs/heads/master@{#25742} --- src/compiler/register-allocator.cc | 797 ++++++++++++++++++------------------- src/compiler/register-allocator.h | 25 +- 2 files changed, 401 insertions(+), 421 deletions(-) diff --git a/src/compiler/register-allocator.cc b/src/compiler/register-allocator.cc index 98f40f6..e01fe1f 100644 --- a/src/compiler/register-allocator.cc +++ b/src/compiler/register-allocator.cc @@ -30,15 +30,22 @@ static void TraceAlloc(const char* msg, ...) { } +static void RemoveElement(ZoneVector* v, LiveRange* range) { + auto it = std::find(v->begin(), v->end(), range); + DCHECK(it != v->end()); + v->erase(it); +} + + UsePosition::UsePosition(LifetimePosition pos, InstructionOperand* operand, InstructionOperand* hint) : operand_(operand), hint_(hint), pos_(pos), - next_(NULL), + next_(nullptr), requires_reg_(false), register_beneficial_(true) { - if (operand_ != NULL && operand_->IsUnallocated()) { + if (operand_ != nullptr && operand_->IsUnallocated()) { const UnallocatedOperand* unalloc = UnallocatedOperand::cast(operand_); requires_reg_ = unalloc->HasRegisterPolicy(); register_beneficial_ = !unalloc->HasAnyPolicy(); @@ -48,7 +55,7 @@ UsePosition::UsePosition(LifetimePosition pos, InstructionOperand* operand, bool UsePosition::HasHint() const { - return hint_ != NULL && !hint_->IsUnallocated(); + return hint_ != nullptr && !hint_->IsUnallocated(); } @@ -60,7 +67,7 @@ bool UsePosition::RegisterIsBeneficial() const { return register_beneficial_; } void UseInterval::SplitAt(LifetimePosition pos, Zone* zone) { DCHECK(Contains(pos) && pos.Value() != start().Value()); - UseInterval* after = new (zone) UseInterval(pos, end_); + auto after = new (zone) UseInterval(pos, end_); after->next_ = next_; next_ = after; end_ = pos; @@ -82,7 +89,7 @@ struct LiveRange::SpillAtDefinitionList : ZoneObject { void LiveRange::Verify() const { UsePosition* cur = first_pos_; - while (cur != NULL) { + while (cur != nullptr) { DCHECK(Start().Value() <= cur->pos().Value() && cur->pos().Value() <= End().Value()); cur = cur->next(); @@ -92,7 +99,7 @@ void LiveRange::Verify() const { bool LiveRange::HasOverlap(UseInterval* target) const { UseInterval* current_interval = first_interval_; - while (current_interval != NULL) { + while (current_interval != nullptr) { // Intervals overlap if the start of one is contained in the other. if (current_interval->Contains(target->start()) || target->Contains(current_interval->start())) { @@ -154,7 +161,7 @@ void LiveRange::CommitSpillsAtDefinition(InstructionSequence* sequence, InstructionOperand* op) { auto to_spill = TopLevel()->spills_at_definition_; if (to_spill == nullptr) return; - Zone* zone = sequence->zone(); + auto zone = sequence->zone(); for (; to_spill != nullptr; to_spill = to_spill->next) { auto gap = sequence->GapAt(to_spill->gap_index); auto move = gap->GetOrCreateParallelMove(GapInstruction::START, zone); @@ -191,8 +198,8 @@ void LiveRange::CommitSpillOperand(InstructionOperand* operand) { UsePosition* LiveRange::NextUsePosition(LifetimePosition start) { UsePosition* use_pos = last_processed_use_; - if (use_pos == NULL) use_pos = first_pos(); - while (use_pos != NULL && use_pos->pos().Value() < start.Value()) { + if (use_pos == nullptr) use_pos = first_pos(); + while (use_pos != nullptr && use_pos->pos().Value() < start.Value()) { use_pos = use_pos->next(); } last_processed_use_ = use_pos; @@ -203,7 +210,7 @@ UsePosition* LiveRange::NextUsePosition(LifetimePosition start) { UsePosition* LiveRange::NextUsePositionRegisterIsBeneficial( LifetimePosition start) { UsePosition* pos = NextUsePosition(start); - while (pos != NULL && !pos->RegisterIsBeneficial()) { + while (pos != nullptr && !pos->RegisterIsBeneficial()) { pos = pos->next(); } return pos; @@ -212,9 +219,9 @@ UsePosition* LiveRange::NextUsePositionRegisterIsBeneficial( UsePosition* LiveRange::PreviousUsePositionRegisterIsBeneficial( LifetimePosition start) { - UsePosition* pos = first_pos(); - UsePosition* prev = NULL; - while (pos != NULL && pos->pos().Value() < start.Value()) { + auto pos = first_pos(); + UsePosition* prev = nullptr; + while (pos != nullptr && pos->pos().Value() < start.Value()) { if (pos->RegisterIsBeneficial()) prev = pos; pos = pos->next(); } @@ -224,7 +231,7 @@ UsePosition* LiveRange::PreviousUsePositionRegisterIsBeneficial( UsePosition* LiveRange::NextRegisterPosition(LifetimePosition start) { UsePosition* pos = NextUsePosition(start); - while (pos != NULL && !pos->RequiresRegister()) { + while (pos != nullptr && !pos->RequiresRegister()) { pos = pos->next(); } return pos; @@ -234,8 +241,8 @@ UsePosition* LiveRange::NextRegisterPosition(LifetimePosition start) { bool LiveRange::CanBeSpilled(LifetimePosition pos) { // We cannot spill a live range that has a use requiring a register // at the current or the immediate next position. - UsePosition* use_pos = NextRegisterPosition(pos); - if (use_pos == NULL) return true; + auto use_pos = NextRegisterPosition(pos); + if (use_pos == nullptr) return true; return use_pos->pos().Value() > pos.NextInstruction().InstructionEnd().Value(); } @@ -267,9 +274,9 @@ InstructionOperand* LiveRange::CreateAssignedOperand(Zone* zone) const { UseInterval* LiveRange::FirstSearchIntervalForPosition( LifetimePosition position) const { - if (current_interval_ == NULL) return first_interval_; + if (current_interval_ == nullptr) return first_interval_; if (current_interval_->start().Value() > position.Value()) { - current_interval_ = NULL; + current_interval_ = nullptr; return first_interval_; } return current_interval_; @@ -278,11 +285,10 @@ UseInterval* LiveRange::FirstSearchIntervalForPosition( void LiveRange::AdvanceLastProcessedMarker( UseInterval* to_start_of, LifetimePosition but_not_past) const { - if (to_start_of == NULL) return; + if (to_start_of == nullptr) return; if (to_start_of->start().Value() > but_not_past.Value()) return; - LifetimePosition start = current_interval_ == NULL - ? LifetimePosition::Invalid() - : current_interval_->start(); + auto start = current_interval_ == nullptr ? LifetimePosition::Invalid() + : current_interval_->start(); if (to_start_of->start().Value() > start.Value()) { current_interval_ = to_start_of; } @@ -296,7 +302,7 @@ void LiveRange::SplitAt(LifetimePosition position, LiveRange* result, // Find the last interval that ends before the position. If the // position is contained in one of the intervals in the chain, we // split that interval and use the first part. - UseInterval* current = FirstSearchIntervalForPosition(position); + auto current = FirstSearchIntervalForPosition(position); // If the split position coincides with the beginning of a use interval // we need to split use positons in a special way. @@ -307,12 +313,12 @@ void LiveRange::SplitAt(LifetimePosition position, LiveRange* result, current = first_interval_; } - while (current != NULL) { + while (current != nullptr) { if (current->Contains(position)) { current->SplitAt(position, zone); break; } - UseInterval* next = current->next(); + auto next = current->next(); if (next->start().Value() >= position.Value()) { split_at_start = (next->start().Value() == position.Value()); break; @@ -321,8 +327,8 @@ void LiveRange::SplitAt(LifetimePosition position, LiveRange* result, } // Partition original use intervals to the two live ranges. - UseInterval* before = current; - UseInterval* after = before->next(); + auto before = current; + auto after = before->next(); result->last_interval_ = (last_interval_ == before) ? after // Only interval in the range after split. @@ -332,39 +338,41 @@ void LiveRange::SplitAt(LifetimePosition position, LiveRange* result, // Find the last use position before the split and the first use // position after it. - UsePosition* use_after = first_pos_; - UsePosition* use_before = NULL; + auto use_after = first_pos_; + UsePosition* use_before = nullptr; if (split_at_start) { // The split position coincides with the beginning of a use interval (the // end of a lifetime hole). Use at this position should be attributed to // the split child because split child owns use interval covering it. - while (use_after != NULL && use_after->pos().Value() < position.Value()) { + while (use_after != nullptr && + use_after->pos().Value() < position.Value()) { use_before = use_after; use_after = use_after->next(); } } else { - while (use_after != NULL && use_after->pos().Value() <= position.Value()) { + while (use_after != nullptr && + use_after->pos().Value() <= position.Value()) { use_before = use_after; use_after = use_after->next(); } } // Partition original use positions to the two live ranges. - if (use_before != NULL) { - use_before->next_ = NULL; + if (use_before != nullptr) { + use_before->next_ = nullptr; } else { - first_pos_ = NULL; + first_pos_ = nullptr; } result->first_pos_ = use_after; // Discard cached iteration state. It might be pointing // to the use that no longer belongs to this live range. - last_processed_use_ = NULL; - current_interval_ = NULL; + last_processed_use_ = nullptr; + current_interval_ = nullptr; // Link the new live range in the chain before any of the other // ranges linked from the range before the split. - result->parent_ = (parent_ == NULL) ? this : parent_; + result->parent_ = (parent_ == nullptr) ? this : parent_; result->kind_ = result->parent_->kind_; result->next_ = next_; next_ = result; @@ -386,9 +394,9 @@ bool LiveRange::ShouldBeAllocatedBefore(const LiveRange* other) const { LifetimePosition other_start = other->Start(); if (start.Value() == other_start.Value()) { UsePosition* pos = first_pos(); - if (pos == NULL) return false; + if (pos == nullptr) return false; UsePosition* other_pos = other->first_pos(); - if (other_pos == NULL) return true; + if (other_pos == nullptr) return true; return pos->pos().Value() < other_pos->pos().Value(); } return start.Value() < other_start.Value(); @@ -397,7 +405,7 @@ bool LiveRange::ShouldBeAllocatedBefore(const LiveRange* other) const { void LiveRange::ShortenTo(LifetimePosition start) { TraceAlloc("Shorten live range %d to [%d\n", id_, start.Value()); - DCHECK(first_interval_ != NULL); + DCHECK(first_interval_ != nullptr); DCHECK(first_interval_->start().Value() <= start.Value()); DCHECK(start.Value() < first_interval_->end().Value()); first_interval_->set_start(start); @@ -408,8 +416,8 @@ void LiveRange::EnsureInterval(LifetimePosition start, LifetimePosition end, Zone* zone) { TraceAlloc("Ensure live range %d in interval [%d %d[\n", id_, start.Value(), end.Value()); - LifetimePosition new_end = end; - while (first_interval_ != NULL && + auto new_end = end; + while (first_interval_ != nullptr && first_interval_->start().Value() <= end.Value()) { if (first_interval_->end().Value() > end.Value()) { new_end = first_interval_->end(); @@ -417,10 +425,10 @@ void LiveRange::EnsureInterval(LifetimePosition start, LifetimePosition end, first_interval_ = first_interval_->next(); } - UseInterval* new_interval = new (zone) UseInterval(start, new_end); + auto new_interval = new (zone) UseInterval(start, new_end); new_interval->next_ = first_interval_; first_interval_ = new_interval; - if (new_interval->next() == NULL) { + if (new_interval->next() == nullptr) { last_interval_ = new_interval; } } @@ -430,15 +438,15 @@ void LiveRange::AddUseInterval(LifetimePosition start, LifetimePosition end, Zone* zone) { TraceAlloc("Add to live range %d interval [%d %d[\n", id_, start.Value(), end.Value()); - if (first_interval_ == NULL) { - UseInterval* interval = new (zone) UseInterval(start, end); + if (first_interval_ == nullptr) { + auto interval = new (zone) UseInterval(start, end); first_interval_ = interval; last_interval_ = interval; } else { if (end.Value() == first_interval_->start().Value()) { first_interval_->set_start(start); } else if (end.Value() < first_interval_->start().Value()) { - UseInterval* interval = new (zone) UseInterval(start, end); + auto interval = new (zone) UseInterval(start, end); interval->set_next(first_interval_); first_interval_ = interval; } else { @@ -457,17 +465,17 @@ void LiveRange::AddUsePosition(LifetimePosition pos, InstructionOperand* operand, InstructionOperand* hint, Zone* zone) { TraceAlloc("Add to live range %d use position %d\n", id_, pos.Value()); - UsePosition* use_pos = new (zone) UsePosition(pos, operand, hint); - UsePosition* prev_hint = NULL; - UsePosition* prev = NULL; - UsePosition* current = first_pos_; - while (current != NULL && current->pos().Value() < pos.Value()) { + auto use_pos = new (zone) UsePosition(pos, operand, hint); + UsePosition* prev_hint = nullptr; + UsePosition* prev = nullptr; + auto current = first_pos_; + while (current != nullptr && current->pos().Value() < pos.Value()) { prev_hint = current->HasHint() ? current : prev_hint; prev = current; current = current->next(); } - if (prev == NULL) { + if (prev == nullptr) { use_pos->set_next(first_pos_); first_pos_ = use_pos; } else { @@ -475,15 +483,15 @@ void LiveRange::AddUsePosition(LifetimePosition pos, prev->next_ = use_pos; } - if (prev_hint == NULL && use_pos->HasHint()) { + if (prev_hint == nullptr && use_pos->HasHint()) { current_hint_operand_ = hint; } } void LiveRange::ConvertUsesToOperand(InstructionOperand* op) { - UsePosition* use_pos = first_pos(); - while (use_pos != NULL) { + auto use_pos = first_pos(); + while (use_pos != nullptr) { DCHECK(Start().Value() <= use_pos->pos().Value() && use_pos->pos().Value() <= End().Value()); @@ -506,10 +514,10 @@ bool LiveRange::CanCover(LifetimePosition position) const { bool LiveRange::Covers(LifetimePosition position) { if (!CanCover(position)) return false; - UseInterval* start_search = FirstSearchIntervalForPosition(position); - for (UseInterval* interval = start_search; interval != NULL; + auto start_search = FirstSearchIntervalForPosition(position); + for (auto interval = start_search; interval != nullptr; interval = interval->next()) { - DCHECK(interval->next() == NULL || + DCHECK(interval->next() == nullptr || interval->next()->start().Value() >= interval->start().Value()); AdvanceLastProcessedMarker(interval, position); if (interval->Contains(position)) return true; @@ -520,20 +528,20 @@ bool LiveRange::Covers(LifetimePosition position) { LifetimePosition LiveRange::FirstIntersection(LiveRange* other) { - UseInterval* b = other->first_interval(); - if (b == NULL) return LifetimePosition::Invalid(); - LifetimePosition advance_last_processed_up_to = b->start(); - UseInterval* a = FirstSearchIntervalForPosition(b->start()); - while (a != NULL && b != NULL) { + auto b = other->first_interval(); + if (b == nullptr) return LifetimePosition::Invalid(); + auto advance_last_processed_up_to = b->start(); + auto a = FirstSearchIntervalForPosition(b->start()); + while (a != nullptr && b != nullptr) { if (a->start().Value() > other->End().Value()) break; if (b->start().Value() > End().Value()) break; - LifetimePosition cur_intersection = a->Intersect(b); + auto cur_intersection = a->Intersect(b); if (cur_intersection.IsValid()) { return cur_intersection; } if (a->start().Value() < b->start().Value()) { a = a->next(); - if (a == NULL || a->start().Value() > other->End().Value()) break; + if (a == nullptr || a->start().Value() > other->End().Value()) break; AdvanceLastProcessedMarker(a, advance_last_processed_up_to); } else { b = b->next(); @@ -553,17 +561,17 @@ RegisterAllocator::RegisterAllocator(const RegisterConfiguration* config, debug_name_(debug_name), config_(config), phi_map_(PhiMap::key_compare(), PhiMap::allocator_type(local_zone())), - live_in_sets_(code->InstructionBlockCount(), local_zone()), - live_ranges_(code->VirtualRegisterCount() * 2, local_zone()), - fixed_live_ranges_(this->config()->num_general_registers(), NULL, + live_in_sets_(code->InstructionBlockCount(), nullptr, local_zone()), + live_ranges_(code->VirtualRegisterCount() * 2, nullptr, local_zone()), + fixed_live_ranges_(this->config()->num_general_registers(), nullptr, local_zone()), - fixed_double_live_ranges_(this->config()->num_double_registers(), NULL, + fixed_double_live_ranges_(this->config()->num_double_registers(), nullptr, local_zone()), - unhandled_live_ranges_(code->VirtualRegisterCount() * 2, local_zone()), - active_live_ranges_(8, local_zone()), - inactive_live_ranges_(8, local_zone()), - reusable_slots_(8, local_zone()), - spill_ranges_(8, local_zone()), + unhandled_live_ranges_(local_zone()), + active_live_ranges_(local_zone()), + inactive_live_ranges_(local_zone()), + reusable_slots_(local_zone()), + spill_ranges_(local_zone()), mode_(UNALLOCATED_REGISTERS), num_registers_(-1), allocation_ok_(true) { @@ -575,6 +583,12 @@ RegisterAllocator::RegisterAllocator(const RegisterConfiguration* config, // when allocating local arrays. DCHECK(RegisterConfiguration::kMaxDoubleRegisters >= this->config()->num_general_registers()); + unhandled_live_ranges().reserve( + static_cast(code->VirtualRegisterCount() * 2)); + active_live_ranges().reserve(8); + inactive_live_ranges().reserve(8); + reusable_slots().reserve(8); + spill_ranges().reserve(8); assigned_registers_ = new (code_zone()) BitVector(config->num_general_registers(), code_zone()); assigned_double_registers_ = new (code_zone()) @@ -584,28 +598,22 @@ RegisterAllocator::RegisterAllocator(const RegisterConfiguration* config, } -void RegisterAllocator::InitializeLivenessAnalysis() { - // Initialize the live_in sets for each block to NULL. - std::fill(live_in_sets_.begin(), live_in_sets_.end(), nullptr); -} - - BitVector* RegisterAllocator::ComputeLiveOut(const InstructionBlock* block) { // Compute live out for the given block, except not including backward // successor edges. - BitVector* live_out = new (local_zone()) + auto live_out = new (local_zone()) BitVector(code()->VirtualRegisterCount(), local_zone()); // Process all successor blocks. for (auto succ : block->successors()) { // Add values live on entry to the successor. Note the successor's // live_in will not be computed yet for backwards edges. - BitVector* live_in = live_in_sets_[succ.ToSize()]; - if (live_in != NULL) live_out->Union(*live_in); + auto live_in = live_in_sets_[succ.ToSize()]; + if (live_in != nullptr) live_out->Union(*live_in); // All phi input operands corresponding to this successor edge are live // out from this block. - const InstructionBlock* successor = code()->InstructionBlockAt(succ); + auto successor = code()->InstructionBlockAt(succ); size_t index = successor->PredecessorIndexOf(block->rpo_number()); DCHECK(index < successor->PredecessorCount()); for (auto phi : successor->phis()) { @@ -620,14 +628,14 @@ void RegisterAllocator::AddInitialIntervals(const InstructionBlock* block, BitVector* live_out) { // Add an interval that includes the entire block to the live range for // each live_out value. - LifetimePosition start = + auto start = LifetimePosition::FromInstructionIndex(block->first_instruction_index()); - LifetimePosition end = LifetimePosition::FromInstructionIndex( - block->last_instruction_index()).NextInstruction(); + auto end = LifetimePosition::FromInstructionIndex( + block->last_instruction_index()).NextInstruction(); BitVector::Iterator iterator(live_out); while (!iterator.Done()) { int operand_index = iterator.Current(); - LiveRange* range = LiveRangeFor(operand_index); + auto range = LiveRangeFor(operand_index); range->AddUseInterval(start, end, local_zone()); iterator.Advance(); } @@ -657,7 +665,7 @@ InstructionOperand* RegisterAllocator::AllocateFixed( } if (is_tagged) { TraceAlloc("Fixed reg is tagged at %d\n", pos); - Instruction* instr = InstructionAt(pos); + auto instr = InstructionAt(pos); if (instr->HasPointerMap()) { instr->pointer_map()->RecordPointer(operand, code_zone()); } @@ -668,8 +676,8 @@ InstructionOperand* RegisterAllocator::AllocateFixed( LiveRange* RegisterAllocator::FixedLiveRangeFor(int index) { DCHECK(index < config()->num_general_registers()); - LiveRange* result = fixed_live_ranges_[index]; - if (result == NULL) { + auto result = fixed_live_ranges()[index]; + if (result == nullptr) { // TODO(titzer): add a utility method to allocate a new LiveRange: // The LiveRange object itself can go in this zone, but the // InstructionOperand needs @@ -678,7 +686,7 @@ LiveRange* RegisterAllocator::FixedLiveRangeFor(int index) { DCHECK(result->IsFixed()); result->kind_ = GENERAL_REGISTERS; SetLiveRangeAssignedRegister(result, index); - fixed_live_ranges_[index] = result; + fixed_live_ranges()[index] = result; } return result; } @@ -686,14 +694,14 @@ LiveRange* RegisterAllocator::FixedLiveRangeFor(int index) { LiveRange* RegisterAllocator::FixedDoubleLiveRangeFor(int index) { DCHECK(index < config()->num_aliased_double_registers()); - LiveRange* result = fixed_double_live_ranges_[index]; - if (result == NULL) { + auto result = fixed_double_live_ranges()[index]; + if (result == nullptr) { result = new (local_zone()) LiveRange(FixedDoubleLiveRangeID(index), code_zone()); DCHECK(result->IsFixed()); result->kind_ = DOUBLE_REGISTERS; SetLiveRangeAssignedRegister(result, index); - fixed_double_live_ranges_[index] = result; + fixed_double_live_ranges()[index] = result; } return result; } @@ -701,12 +709,12 @@ LiveRange* RegisterAllocator::FixedDoubleLiveRangeFor(int index) { LiveRange* RegisterAllocator::LiveRangeFor(int index) { if (index >= static_cast(live_ranges_.size())) { - live_ranges_.resize(index + 1, NULL); + live_ranges_.resize(index + 1, nullptr); } - LiveRange* result = live_ranges_[index]; - if (result == NULL) { + auto result = live_ranges()[index]; + if (result == nullptr) { result = new (local_zone()) LiveRange(index, code_zone()); - live_ranges_[index] = result; + live_ranges()[index] = result; } return result; } @@ -726,7 +734,7 @@ LiveRange* RegisterAllocator::LiveRangeFor(InstructionOperand* operand) { } else if (operand->IsDoubleRegister()) { return FixedDoubleLiveRangeFor(operand->index()); } else { - return NULL; + return nullptr; } } @@ -734,19 +742,20 @@ LiveRange* RegisterAllocator::LiveRangeFor(InstructionOperand* operand) { void RegisterAllocator::Define(LifetimePosition position, InstructionOperand* operand, InstructionOperand* hint) { - LiveRange* range = LiveRangeFor(operand); - if (range == NULL) return; + auto range = LiveRangeFor(operand); + if (range == nullptr) return; if (range->IsEmpty() || range->Start().Value() > position.Value()) { // Can happen if there is a definition without use. range->AddUseInterval(position, position.NextInstruction(), local_zone()); - range->AddUsePosition(position.NextInstruction(), NULL, NULL, local_zone()); + range->AddUsePosition(position.NextInstruction(), nullptr, nullptr, + local_zone()); } else { range->ShortenTo(position); } if (operand->IsUnallocated()) { - UnallocatedOperand* unalloc_operand = UnallocatedOperand::cast(operand); + auto unalloc_operand = UnallocatedOperand::cast(operand); range->AddUsePosition(position, unalloc_operand, hint, local_zone()); } } @@ -756,8 +765,8 @@ void RegisterAllocator::Use(LifetimePosition block_start, LifetimePosition position, InstructionOperand* operand, InstructionOperand* hint) { - LiveRange* range = LiveRangeFor(operand); - if (range == NULL) return; + auto range = LiveRangeFor(operand); + if (range == nullptr) return; if (operand->IsUnallocated()) { UnallocatedOperand* unalloc_operand = UnallocatedOperand::cast(operand); range->AddUsePosition(position, unalloc_operand, hint, local_zone()); @@ -769,14 +778,13 @@ void RegisterAllocator::Use(LifetimePosition block_start, void RegisterAllocator::AddConstraintsGapMove(int index, InstructionOperand* from, InstructionOperand* to) { - GapInstruction* gap = code()->GapAt(index); - ParallelMove* move = - gap->GetOrCreateParallelMove(GapInstruction::START, code_zone()); + auto gap = code()->GapAt(index); + auto move = gap->GetOrCreateParallelMove(GapInstruction::START, code_zone()); if (from->IsUnallocated()) { const ZoneList* move_operands = move->move_operands(); for (int i = 0; i < move_operands->length(); ++i) { - MoveOperands cur = move_operands->at(i); - InstructionOperand* cur_to = cur.destination(); + auto cur = move_operands->at(i); + auto cur_to = cur.destination(); if (cur_to->IsUnallocated()) { if (UnallocatedOperand::cast(cur_to)->virtual_register() == UnallocatedOperand::cast(from)->virtual_register()) { @@ -792,7 +800,7 @@ void RegisterAllocator::AddConstraintsGapMove(int index, static bool AreUseIntervalsIntersecting(UseInterval* interval1, UseInterval* interval2) { - while (interval1 != NULL && interval2 != NULL) { + while (interval1 != nullptr && interval2 != nullptr) { if (interval1->start().Value() < interval2->start().Value()) { if (interval1->end().Value() > interval2->start().Value()) { return true; @@ -811,13 +819,13 @@ static bool AreUseIntervalsIntersecting(UseInterval* interval1, SpillRange::SpillRange(LiveRange* range, int id, Zone* zone) : id_(id), live_ranges_(1, zone), end_position_(range->End()) { - UseInterval* src = range->first_interval(); - UseInterval* result = NULL; - UseInterval* node = NULL; + auto src = range->first_interval(); + UseInterval* result = nullptr; + UseInterval* node = nullptr; // Copy the nodes - while (src != NULL) { + while (src != nullptr) { UseInterval* new_node = new (zone) UseInterval(src->start(), src->end()); - if (result == NULL) { + if (result == nullptr) { result = new_node; } else { node->set_next(new_node); @@ -849,7 +857,7 @@ bool SpillRange::TryMerge(SpillRange* other, Zone* zone) { } MergeDisjointIntervals(other->use_interval_, zone); - other->use_interval_ = NULL; + other->use_interval_ = nullptr; for (int i = 0; i < other->live_ranges_.length(); i++) { DCHECK(other->live_ranges_.at(i)->GetSpillRange() == other); @@ -874,19 +882,21 @@ void SpillRange::SetOperand(InstructionOperand* op) { void SpillRange::MergeDisjointIntervals(UseInterval* other, Zone* zone) { - UseInterval* tail = NULL; - UseInterval* current = use_interval_; - while (other != NULL) { + UseInterval* tail = nullptr; + auto current = use_interval_; + while (other != nullptr) { // Make sure the 'current' list starts first - if (current == NULL || current->start().Value() > other->start().Value()) { + if (current == nullptr || + current->start().Value() > other->start().Value()) { std::swap(current, other); } // Check disjointness - DCHECK(other == NULL || current->end().Value() <= other->start().Value()); + DCHECK(other == nullptr || + current->end().Value() <= other->start().Value()); // Append the 'current' node to the result accumulator and move forward - if (tail == NULL) { + if (tail == nullptr) { use_interval_ = current; } else { tail->set_next(current); @@ -902,21 +912,19 @@ void RegisterAllocator::ReuseSpillSlots() { DCHECK(FLAG_turbo_reuse_spill_slots); // Merge disjoint spill ranges - for (int i = 0; i < spill_ranges_.length(); i++) { - SpillRange* range = spill_ranges_.at(i); - if (!range->IsEmpty()) { - for (int j = i + 1; j < spill_ranges_.length(); j++) { - SpillRange* other = spill_ranges_.at(j); - if (!other->IsEmpty()) { - range->TryMerge(spill_ranges_.at(j), local_zone()); - } + for (size_t i = 0; i < spill_ranges().size(); i++) { + auto range = spill_ranges()[i]; + if (range->IsEmpty()) continue; + for (size_t j = i + 1; j < spill_ranges().size(); j++) { + auto other = spill_ranges()[j]; + if (!other->IsEmpty()) { + range->TryMerge(other, local_zone()); } } } // Allocate slots for the merged spill ranges. - for (int i = 0; i < spill_ranges_.length(); i++) { - auto range = spill_ranges_.at(i); + for (auto range : spill_ranges()) { if (range->IsEmpty()) continue; // Allocate a new operand referring to the spill slot. auto kind = range->Kind(); @@ -944,10 +952,10 @@ void RegisterAllocator::CommitAssignment() { SpillRange* RegisterAllocator::AssignSpillRangeToLiveRange(LiveRange* range) { DCHECK(FLAG_turbo_reuse_spill_slots); - int spill_id = spill_ranges_.length(); - SpillRange* spill_range = + int spill_id = static_cast(spill_ranges().size()); + auto spill_range = new (local_zone()) SpillRange(range, spill_id, local_zone()); - spill_ranges_.Add(spill_range, local_zone()); + spill_ranges().push_back(spill_range); return spill_range; } @@ -969,7 +977,7 @@ bool RegisterAllocator::TryReuseSpillForPhi(LiveRange* range) { LiveRange* op_range = LiveRangeFor(op); if (op_range->GetSpillRange() == nullptr) continue; auto pred = code()->InstructionBlockAt(block->predecessors()[i]); - LifetimePosition pred_end = + auto pred_end = LifetimePosition::FromInstructionIndex(pred->last_instruction_index()); while (op_range != nullptr && !op_range->CanCover(pred_end)) { op_range = op_range->next(); @@ -989,14 +997,14 @@ bool RegisterAllocator::TryReuseSpillForPhi(LiveRange* range) { // Try to merge the spilled operands and count the number of merged spilled // operands. - DCHECK(first_op != NULL); - SpillRange* first_op_spill = first_op->GetSpillRange(); + DCHECK(first_op != nullptr); + auto first_op_spill = first_op->GetSpillRange(); size_t num_merged = 1; for (size_t i = 1; i < phi->operands().size(); i++) { int op = phi->operands()[i]; - LiveRange* op_range = LiveRangeFor(op); - SpillRange* op_spill = op_range->GetSpillRange(); - if (op_spill != NULL) { + auto op_range = LiveRangeFor(op); + auto op_spill = op_range->GetSpillRange(); + if (op_spill != nullptr) { if (op_spill->id() == first_op_spill->id() || first_op_spill->TryMerge(op_spill, local_zone())) { num_merged++; @@ -1014,18 +1022,18 @@ bool RegisterAllocator::TryReuseSpillForPhi(LiveRange* range) { // If the range does not need register soon, spill it to the merged // spill range. - LifetimePosition next_pos = range->Start(); + auto next_pos = range->Start(); if (code()->IsGapAt(next_pos.InstructionIndex())) { next_pos = next_pos.NextInstruction(); } - UsePosition* pos = range->NextUsePositionRegisterIsBeneficial(next_pos); - if (pos == NULL) { - SpillRange* spill_range = AssignSpillRangeToLiveRange(range->TopLevel()); + auto pos = range->NextUsePositionRegisterIsBeneficial(next_pos); + if (pos == nullptr) { + auto spill_range = AssignSpillRangeToLiveRange(range->TopLevel()); CHECK(first_op_spill->TryMerge(spill_range, local_zone())); Spill(range); return true; } else if (pos->pos().Value() > range->Start().NextInstruction().Value()) { - SpillRange* spill_range = AssignSpillRangeToLiveRange(range->TopLevel()); + auto spill_range = AssignSpillRangeToLiveRange(range->TopLevel()); CHECK(first_op_spill->TryMerge(spill_range, local_zone())); SpillBetween(range, range->Start(), pos->pos()); if (!AllocationOk()) return false; @@ -1042,8 +1050,8 @@ void RegisterAllocator::MeetRegisterConstraints(const InstructionBlock* block) { DCHECK_NE(-1, start); for (int i = start; i <= end; ++i) { if (code()->IsGapAt(i)) { - Instruction* instr = NULL; - Instruction* prev_instr = NULL; + Instruction* instr = nullptr; + Instruction* prev_instr = nullptr; if (i < end) instr = InstructionAt(i + 1); if (i > start) prev_instr = InstructionAt(i - 1); MeetConstraintsBetween(prev_instr, instr, i); @@ -1061,13 +1069,13 @@ void RegisterAllocator::MeetRegisterConstraints(const InstructionBlock* block) { void RegisterAllocator::MeetRegisterConstraintsForLastInstructionInBlock( const InstructionBlock* block) { int end = block->last_instruction_index(); - Instruction* last_instruction = InstructionAt(end); + auto last_instruction = InstructionAt(end); for (size_t i = 0; i < last_instruction->OutputCount(); i++) { - InstructionOperand* output_operand = last_instruction->OutputAt(i); + auto output_operand = last_instruction->OutputAt(i); DCHECK(!output_operand->IsConstant()); - UnallocatedOperand* output = UnallocatedOperand::cast(output_operand); + auto output = UnallocatedOperand::cast(output_operand); int output_vreg = output->virtual_register(); - LiveRange* range = LiveRangeFor(output_vreg); + auto range = LiveRangeFor(output_vreg); bool assigned = false; if (output->HasFixedPolicy()) { AllocateFixed(output, -1, false); @@ -1111,10 +1119,10 @@ void RegisterAllocator::MeetRegisterConstraintsForLastInstructionInBlock( void RegisterAllocator::MeetConstraintsBetween(Instruction* first, Instruction* second, int gap_index) { - if (first != NULL) { + if (first != nullptr) { // Handle fixed temporaries. for (size_t i = 0; i < first->TempCount(); i++) { - UnallocatedOperand* temp = UnallocatedOperand::cast(first->TempAt(i)); + auto temp = UnallocatedOperand::cast(first->TempAt(i)); if (temp->HasFixedPolicy()) { AllocateFixed(temp, gap_index - 1, false); } @@ -1125,16 +1133,15 @@ void RegisterAllocator::MeetConstraintsBetween(Instruction* first, InstructionOperand* output = first->OutputAt(i); if (output->IsConstant()) { int output_vreg = output->index(); - LiveRange* range = LiveRangeFor(output_vreg); + auto range = LiveRangeFor(output_vreg); range->SetSpillStartIndex(gap_index - 1); range->SetSpillOperand(output); } else { - UnallocatedOperand* first_output = UnallocatedOperand::cast(output); - LiveRange* range = LiveRangeFor(first_output->virtual_register()); + auto first_output = UnallocatedOperand::cast(output); + auto range = LiveRangeFor(first_output->virtual_register()); bool assigned = false; if (first_output->HasFixedPolicy()) { - UnallocatedOperand* output_copy = - first_output->CopyUnconstrained(code_zone()); + auto output_copy = first_output->CopyUnconstrained(code_zone()); bool is_tagged = HasTaggedValue(first_output->virtual_register()); AllocateFixed(first_output, gap_index, is_tagged); @@ -1158,15 +1165,14 @@ void RegisterAllocator::MeetConstraintsBetween(Instruction* first, } } - if (second != NULL) { + if (second != nullptr) { // Handle fixed input operands of second instruction. for (size_t i = 0; i < second->InputCount(); i++) { - InstructionOperand* input = second->InputAt(i); + auto input = second->InputAt(i); if (input->IsImmediate()) continue; // Ignore immediates. - UnallocatedOperand* cur_input = UnallocatedOperand::cast(input); + auto cur_input = UnallocatedOperand::cast(input); if (cur_input->HasFixedPolicy()) { - UnallocatedOperand* input_copy = - cur_input->CopyUnconstrained(code_zone()); + auto input_copy = cur_input->CopyUnconstrained(code_zone()); bool is_tagged = HasTaggedValue(cur_input->virtual_register()); AllocateFixed(cur_input, gap_index + 1, is_tagged); AddConstraintsGapMove(gap_index, input_copy, cur_input); @@ -1175,9 +1181,9 @@ void RegisterAllocator::MeetConstraintsBetween(Instruction* first, // Handle "output same as input" for second instruction. for (size_t i = 0; i < second->OutputCount(); i++) { - InstructionOperand* output = second->OutputAt(i); + auto output = second->OutputAt(i); if (!output->IsUnallocated()) continue; - UnallocatedOperand* second_output = UnallocatedOperand::cast(output); + auto second_output = UnallocatedOperand::cast(output); if (second_output->HasSameAsInputPolicy()) { DCHECK(i == 0); // Only valid for first output. UnallocatedOperand* cur_input = @@ -1185,8 +1191,7 @@ void RegisterAllocator::MeetConstraintsBetween(Instruction* first, int output_vreg = second_output->virtual_register(); int input_vreg = cur_input->virtual_register(); - UnallocatedOperand* input_copy = - cur_input->CopyUnconstrained(code_zone()); + auto input_copy = cur_input->CopyUnconstrained(code_zone()); cur_input->set_virtual_register(second_output->virtual_register()); AddConstraintsGapMove(gap_index, input_copy, cur_input); @@ -1212,7 +1217,7 @@ void RegisterAllocator::MeetConstraintsBetween(Instruction* first, bool RegisterAllocator::IsOutputRegisterOf(Instruction* instr, int index) { for (size_t i = 0; i < instr->OutputCount(); i++) { - InstructionOperand* output = instr->OutputAt(i); + auto output = instr->OutputAt(i); if (output->IsRegister() && output->index() == index) return true; } return false; @@ -1222,7 +1227,7 @@ bool RegisterAllocator::IsOutputRegisterOf(Instruction* instr, int index) { bool RegisterAllocator::IsOutputDoubleRegisterOf(Instruction* instr, int index) { for (size_t i = 0; i < instr->OutputCount(); i++) { - InstructionOperand* output = instr->OutputAt(i); + auto output = instr->OutputAt(i); if (output->IsDoubleRegister() && output->index() == index) return true; } return false; @@ -1232,33 +1237,30 @@ bool RegisterAllocator::IsOutputDoubleRegisterOf(Instruction* instr, void RegisterAllocator::ProcessInstructions(const InstructionBlock* block, BitVector* live) { int block_start = block->first_instruction_index(); - - LifetimePosition block_start_position = + auto block_start_position = LifetimePosition::FromInstructionIndex(block_start); for (int index = block->last_instruction_index(); index >= block_start; index--) { - LifetimePosition curr_position = - LifetimePosition::FromInstructionIndex(index); - - Instruction* instr = InstructionAt(index); - DCHECK(instr != NULL); + auto curr_position = LifetimePosition::FromInstructionIndex(index); + auto instr = InstructionAt(index); + DCHECK(instr != nullptr); if (instr->IsGapMoves()) { // Process the moves of the gap instruction, making their sources live. - GapInstruction* gap = code()->GapAt(index); + auto gap = code()->GapAt(index); // TODO(titzer): no need to create the parallel move if it doesn't exist. - ParallelMove* move = + auto move = gap->GetOrCreateParallelMove(GapInstruction::START, code_zone()); const ZoneList* move_operands = move->move_operands(); for (int i = 0; i < move_operands->length(); ++i) { - MoveOperands* cur = &move_operands->at(i); - InstructionOperand* from = cur->source(); - InstructionOperand* to = cur->destination(); - InstructionOperand* hint = to; + auto cur = &move_operands->at(i); + auto from = cur->source(); + auto to = cur->destination(); + auto hint = to; if (to->IsUnallocated()) { int to_vreg = UnallocatedOperand::cast(to)->virtual_register(); - LiveRange* to_range = LiveRangeFor(to_vreg); + auto to_range = LiveRangeFor(to_vreg); if (to_range->is_phi()) { DCHECK(!FLAG_turbo_delay_ssa_decon); if (to_range->is_non_loop_phi()) { @@ -1284,7 +1286,7 @@ void RegisterAllocator::ProcessInstructions(const InstructionBlock* block, } else { // Process output, inputs, and temps of this non-gap instruction. for (size_t i = 0; i < instr->OutputCount(); i++) { - InstructionOperand* output = instr->OutputAt(i); + auto output = instr->OutputAt(i); if (output->IsUnallocated()) { int out_vreg = UnallocatedOperand::cast(output)->virtual_register(); live->Remove(out_vreg); @@ -1292,13 +1294,13 @@ void RegisterAllocator::ProcessInstructions(const InstructionBlock* block, int out_vreg = output->index(); live->Remove(out_vreg); } - Define(curr_position, output, NULL); + Define(curr_position, output, nullptr); } if (instr->ClobbersRegisters()) { for (int i = 0; i < config()->num_general_registers(); ++i) { if (!IsOutputRegisterOf(instr, i)) { - LiveRange* range = FixedLiveRangeFor(i); + auto range = FixedLiveRangeFor(i); range->AddUseInterval(curr_position, curr_position.InstructionEnd(), local_zone()); } @@ -1308,7 +1310,7 @@ void RegisterAllocator::ProcessInstructions(const InstructionBlock* block, if (instr->ClobbersDoubleRegisters()) { for (int i = 0; i < config()->num_aliased_double_registers(); ++i) { if (!IsOutputDoubleRegisterOf(instr, i)) { - LiveRange* range = FixedDoubleLiveRangeFor(i); + auto range = FixedDoubleLiveRangeFor(i); range->AddUseInterval(curr_position, curr_position.InstructionEnd(), local_zone()); } @@ -1316,7 +1318,7 @@ void RegisterAllocator::ProcessInstructions(const InstructionBlock* block, } for (size_t i = 0; i < instr->InputCount(); i++) { - InstructionOperand* input = instr->InputAt(i); + auto input = instr->InputAt(i); if (input->IsImmediate()) continue; // Ignore immediates. LifetimePosition use_pos; if (input->IsUnallocated() && @@ -1326,14 +1328,14 @@ void RegisterAllocator::ProcessInstructions(const InstructionBlock* block, use_pos = curr_position.InstructionEnd(); } - Use(block_start_position, use_pos, input, NULL); + Use(block_start_position, use_pos, input, nullptr); if (input->IsUnallocated()) { live->Add(UnallocatedOperand::cast(input)->virtual_register()); } } for (size_t i = 0; i < instr->TempCount(); i++) { - InstructionOperand* temp = instr->TempAt(i); + auto temp = instr->TempAt(i); if (instr->ClobbersTemps()) { if (temp->IsRegister()) continue; if (temp->IsUnallocated()) { @@ -1343,8 +1345,9 @@ void RegisterAllocator::ProcessInstructions(const InstructionBlock* block, } } } - Use(block_start_position, curr_position.InstructionEnd(), temp, NULL); - Define(curr_position, temp, NULL); + Use(block_start_position, curr_position.InstructionEnd(), temp, + nullptr); + Define(curr_position, temp, nullptr); } } } @@ -1373,15 +1376,13 @@ void RegisterAllocator::ResolvePhis(const InstructionBlock* block) { ->HasPointerMap()); } } - LiveRange* live_range = LiveRangeFor(phi_vreg); + auto live_range = LiveRangeFor(phi_vreg); int gap_index = block->first_instruction_index(); live_range->SpillAtDefinition(local_zone(), gap_index, output); live_range->SetSpillStartIndex(gap_index); // We use the phi-ness of some nodes in some later heuristics. live_range->set_is_phi(true); - if (!block->IsLoopHeader()) { - live_range->set_is_non_loop_phi(true); - } + live_range->set_is_non_loop_phi(!block->IsLoopHeader()); } } @@ -1406,7 +1407,7 @@ ParallelMove* RegisterAllocator::GetConnectingParallelMove( LifetimePosition pos) { int index = pos.InstructionIndex(); if (code()->IsGapAt(index)) { - GapInstruction* gap = code()->GapAt(index); + auto gap = code()->GapAt(index); return gap->GetOrCreateParallelMove( pos.IsInstructionStart() ? GapInstruction::START : GapInstruction::END, code_zone()); @@ -1425,14 +1426,11 @@ const InstructionBlock* RegisterAllocator::GetInstructionBlock( void RegisterAllocator::ConnectRanges() { - for (size_t i = 0; i < live_ranges().size(); ++i) { - LiveRange* first_range = live_ranges().at(i); - if (first_range == NULL || first_range->parent() != NULL) continue; - - LiveRange* second_range = first_range->next(); - while (second_range != NULL) { - LifetimePosition pos = second_range->Start(); - + for (auto first_range : live_ranges()) { + if (first_range == nullptr || first_range->IsChild()) continue; + auto second_range = first_range->next(); + while (second_range != nullptr) { + auto pos = second_range->Start(); if (!second_range->IsSpilled()) { // Add gap move if the two live ranges touch and there is no block // boundary. @@ -1443,16 +1441,13 @@ void RegisterAllocator::ConnectRanges() { CanEagerlyResolveControlFlow(GetInstructionBlock(pos)); } if (should_insert) { - ParallelMove* move = GetConnectingParallelMove(pos); - InstructionOperand* prev_operand = - first_range->CreateAssignedOperand(code_zone()); - InstructionOperand* cur_operand = - second_range->CreateAssignedOperand(code_zone()); + auto move = GetConnectingParallelMove(pos); + auto prev_operand = first_range->CreateAssignedOperand(code_zone()); + auto cur_operand = second_range->CreateAssignedOperand(code_zone()); move->AddMove(prev_operand, cur_operand, code_zone()); } } } - first_range = second_range; second_range = second_range->next(); } @@ -1500,15 +1495,15 @@ class LiveRangeBoundArray { public: LiveRangeBoundArray() : length_(0), start_(nullptr) {} - bool ShouldInitialize() { return start_ == NULL; } + bool ShouldInitialize() { return start_ == nullptr; } void Initialize(Zone* zone, const LiveRange* const range) { size_t length = 0; - for (const LiveRange* i = range; i != NULL; i = i->next()) length++; + for (auto i = range; i != nullptr; i = i->next()) length++; start_ = zone->NewArray(static_cast(length)); length_ = length; - LiveRangeBound* curr = start_; - for (const LiveRange* i = range; i != NULL; i = i->next(), ++curr) { + auto curr = start_; + for (auto i = range; i != nullptr; i = i->next(), ++curr) { new (curr) LiveRangeBound(i); } } @@ -1519,7 +1514,7 @@ class LiveRangeBoundArray { while (true) { size_t current_index = left_index + (right_index - left_index) / 2; DCHECK(right_index > current_index); - LiveRangeBound* bound = &start_[current_index]; + auto bound = &start_[current_index]; if (bound->start_.Value() <= position.Value()) { if (position.Value() < bound->end_.Value()) return bound; DCHECK(left_index < current_index); @@ -1531,24 +1526,24 @@ class LiveRangeBoundArray { } LiveRangeBound* FindPred(const InstructionBlock* pred) { - const LifetimePosition pred_end = + auto pred_end = LifetimePosition::FromInstructionIndex(pred->last_instruction_index()); return Find(pred_end); } LiveRangeBound* FindSucc(const InstructionBlock* succ) { - const LifetimePosition succ_start = + auto succ_start = LifetimePosition::FromInstructionIndex(succ->first_instruction_index()); return Find(succ_start); } void Find(const InstructionBlock* block, const InstructionBlock* pred, FindResult* result) const { - const LifetimePosition pred_end = + auto pred_end = LifetimePosition::FromInstructionIndex(pred->last_instruction_index()); - LiveRangeBound* bound = Find(pred_end); + auto bound = Find(pred_end); result->pred_cover_ = bound->range_; - const LifetimePosition cur_start = LifetimePosition::FromInstructionIndex( + auto cur_start = LifetimePosition::FromInstructionIndex( block->first_instruction_index()); // Common case. if (bound->CanCover(cur_start)) { @@ -1556,7 +1551,7 @@ class LiveRangeBoundArray { return; } result->cur_cover_ = Find(cur_start)->range_; - DCHECK(result->pred_cover_ != NULL && result->cur_cover_ != NULL); + DCHECK(result->pred_cover_ != nullptr && result->cur_cover_ != nullptr); } private: @@ -1581,9 +1576,9 @@ class LiveRangeFinder { LiveRangeBoundArray* ArrayFor(int operand_index) { DCHECK(operand_index < bounds_length_); - const LiveRange* range = allocator_.live_ranges()[operand_index]; + auto range = allocator_.live_ranges()[operand_index]; DCHECK(range != nullptr && !range->IsEmpty()); - LiveRangeBoundArray* array = &bounds_[operand_index]; + auto array = &bounds_[operand_index]; if (array->ShouldInitialize()) { array->Initialize(allocator_.local_zone(), range); } @@ -1626,7 +1621,7 @@ void RegisterAllocator::ResolveControlFlow() { } } } - BitVector* live = live_in_sets_[block->rpo_number().ToInt()]; + auto live = live_in_sets_[block->rpo_number().ToInt()]; BitVector::Iterator iterator(live); while (!iterator.Done()) { auto* array = finder.ArrayFor(iterator.Current()); @@ -1637,10 +1632,8 @@ void RegisterAllocator::ResolveControlFlow() { if (result.cur_cover_ == result.pred_cover_ || result.cur_cover_->IsSpilled()) continue; - InstructionOperand* pred_op = - result.pred_cover_->CreateAssignedOperand(code_zone()); - InstructionOperand* cur_op = - result.cur_cover_->CreateAssignedOperand(code_zone()); + auto pred_op = result.pred_cover_->CreateAssignedOperand(code_zone()); + auto cur_op = result.cur_cover_->CreateAssignedOperand(code_zone()); ResolveControlFlow(block, cur_op, pred_block, pred_op); } iterator.Advance(); @@ -1660,8 +1653,7 @@ void RegisterAllocator::ResolveControlFlow(const InstructionBlock* block, } else { DCHECK(pred->SuccessorCount() == 1); gap = GetLastGap(pred); - - Instruction* branch = InstructionAt(pred->last_instruction_index()); + auto branch = InstructionAt(pred->last_instruction_index()); DCHECK(!branch->HasPointerMap()); USE(branch); } @@ -1671,13 +1663,12 @@ void RegisterAllocator::ResolveControlFlow(const InstructionBlock* block, void RegisterAllocator::BuildLiveRanges() { - InitializeLivenessAnalysis(); // Process the blocks in reverse order. for (int block_id = code()->InstructionBlockCount() - 1; block_id >= 0; --block_id) { - const InstructionBlock* block = + auto block = code()->InstructionBlockAt(BasicBlock::RpoNumber::FromInt(block_id)); - BitVector* live = ComputeLiveOut(block); + auto live = ComputeLiveOut(block); // Initially consider all live_out values live for the entire block. We // will shorten these intervals if necessary. AddInitialIntervals(block, live); @@ -1692,14 +1683,14 @@ void RegisterAllocator::BuildLiveRanges() { int phi_vreg = phi->virtual_register(); live->Remove(phi_vreg); if (!FLAG_turbo_delay_ssa_decon) { - InstructionOperand* hint = NULL; - InstructionOperand* phi_operand = NULL; - GapInstruction* gap = + InstructionOperand* hint = nullptr; + InstructionOperand* phi_operand = nullptr; + auto gap = GetLastGap(code()->InstructionBlockAt(block->predecessors()[0])); - ParallelMove* move = + auto move = gap->GetOrCreateParallelMove(GapInstruction::START, code_zone()); for (int j = 0; j < move->move_operands()->length(); ++j) { - InstructionOperand* to = move->move_operands()->at(j).destination(); + auto to = move->move_operands()->at(j).destination(); if (to->IsUnallocated() && UnallocatedOperand::cast(to)->virtual_register() == phi_vreg) { hint = move->move_operands()->at(j).source(); @@ -1707,8 +1698,8 @@ void RegisterAllocator::BuildLiveRanges() { break; } } - DCHECK(hint != NULL); - LifetimePosition block_start = LifetimePosition::FromInstructionIndex( + DCHECK(hint != nullptr); + auto block_start = LifetimePosition::FromInstructionIndex( block->first_instruction_index()); Define(block_start, phi_operand, hint); } @@ -1722,18 +1713,16 @@ void RegisterAllocator::BuildLiveRanges() { // Add a live range stretching from the first loop instruction to the last // for each value live on entry to the header. BitVector::Iterator iterator(live); - LifetimePosition start = LifetimePosition::FromInstructionIndex( + auto start = LifetimePosition::FromInstructionIndex( block->first_instruction_index()); - LifetimePosition end = - LifetimePosition::FromInstructionIndex( - code()->LastLoopInstructionIndex(block)).NextInstruction(); + auto end = LifetimePosition::FromInstructionIndex( + code()->LastLoopInstructionIndex(block)).NextInstruction(); while (!iterator.Done()) { int operand_index = iterator.Current(); - LiveRange* range = LiveRangeFor(operand_index); + auto range = LiveRangeFor(operand_index); range->EnsureInterval(start, end, local_zone()); iterator.Advance(); } - // Insert all values into the live in sets of all blocks in the loop. for (int i = block->rpo_number().ToInt() + 1; i < block->loop_end().ToInt(); ++i) { @@ -1742,26 +1731,22 @@ void RegisterAllocator::BuildLiveRanges() { } } - for (size_t i = 0; i < live_ranges_.size(); ++i) { - if (live_ranges_[i] != NULL) { - live_ranges_[i]->kind_ = RequiredRegisterKind(live_ranges_[i]->id()); - - // TODO(bmeurer): This is a horrible hack to make sure that for constant - // live ranges, every use requires the constant to be in a register. - // Without this hack, all uses with "any" policy would get the constant - // operand assigned. - LiveRange* range = live_ranges_[i]; - if (range->HasSpillOperand() && range->GetSpillOperand()->IsConstant()) { - for (UsePosition* pos = range->first_pos(); pos != NULL; - pos = pos->next_) { - pos->register_beneficial_ = true; - // TODO(dcarney): should the else case assert requires_reg_ == false? - // Can't mark phis as needing a register. - if (!code() - ->InstructionAt(pos->pos().InstructionIndex()) - ->IsGapMoves()) { - pos->requires_reg_ = true; - } + for (auto range : live_ranges()) { + if (range == nullptr) continue; + range->kind_ = RequiredRegisterKind(range->id()); + // TODO(bmeurer): This is a horrible hack to make sure that for constant + // live ranges, every use requires the constant to be in a register. + // Without this hack, all uses with "any" policy would get the constant + // operand assigned. + if (range->HasSpillOperand() && range->GetSpillOperand()->IsConstant()) { + for (auto pos = range->first_pos(); pos != nullptr; pos = pos->next_) { + pos->register_beneficial_ = true; + // TODO(dcarney): should the else case assert requires_reg_ == false? + // Can't mark phis as needing a register. + if (!code() + ->InstructionAt(pos->pos().InstructionIndex()) + ->IsGapMoves()) { + pos->requires_reg_ = true; } } } @@ -1792,10 +1777,7 @@ bool RegisterAllocator::ExistsUseWithoutDefinition() { bool RegisterAllocator::SafePointsAreInOrder() const { int safe_point = 0; - const PointerMapDeque* pointer_maps = code()->pointer_maps(); - for (PointerMapDeque::const_iterator it = pointer_maps->begin(); - it != pointer_maps->end(); ++it) { - PointerMap* map = *it; + for (auto map : *code()->pointer_maps()) { if (safe_point > map->instruction_position()) return false; safe_point = map->instruction_position(); } @@ -1809,13 +1791,12 @@ void RegisterAllocator::PopulatePointerMaps() { // Iterate over all safe point positions and record a pointer // for all spilled live ranges at this point. int last_range_start = 0; - const PointerMapDeque* pointer_maps = code()->pointer_maps(); + auto pointer_maps = code()->pointer_maps(); PointerMapDeque::const_iterator first_it = pointer_maps->begin(); - for (size_t range_idx = 0; range_idx < live_ranges().size(); ++range_idx) { - LiveRange* range = live_ranges().at(range_idx); - if (range == NULL) continue; + for (LiveRange* range : live_ranges()) { + if (range == nullptr) continue; // Iterate over the first parts of multi-part live ranges. - if (range->parent() != NULL) continue; + if (range->IsChild()) continue; // Skip non-reference values. if (!HasTaggedValue(range->id())) continue; // Skip empty live ranges. @@ -1824,8 +1805,8 @@ void RegisterAllocator::PopulatePointerMaps() { // Find the extent of the range and its children. int start = range->Start().InstructionIndex(); int end = 0; - for (LiveRange* cur = range; cur != NULL; cur = cur->next()) { - LifetimePosition this_end = cur->End(); + for (auto cur = range; cur != nullptr; cur = cur->next()) { + auto this_end = cur->End(); if (this_end.InstructionIndex() > end) end = this_end.InstructionIndex(); DCHECK(cur->Start().InstructionIndex() >= start); } @@ -1838,14 +1819,13 @@ void RegisterAllocator::PopulatePointerMaps() { // Step across all the safe points that are before the start of this range, // recording how far we step in order to save doing this for the next range. for (; first_it != pointer_maps->end(); ++first_it) { - PointerMap* map = *first_it; + auto map = *first_it; if (map->instruction_position() >= start) break; } // Step through the safe points to see whether they are in the range. - for (PointerMapDeque::const_iterator it = first_it; - it != pointer_maps->end(); ++it) { - PointerMap* map = *it; + for (auto it = first_it; it != pointer_maps->end(); ++it) { + auto map = *it; int safe_point = map->instruction_position(); // The safe points are sorted so we can stop searching here. @@ -1853,13 +1833,12 @@ void RegisterAllocator::PopulatePointerMaps() { // Advance to the next active range that covers the current // safe point position. - LifetimePosition safe_point_pos = - LifetimePosition::FromInstructionIndex(safe_point); - LiveRange* cur = range; - while (cur != NULL && !cur->Covers(safe_point_pos)) { + auto safe_point_pos = LifetimePosition::FromInstructionIndex(safe_point); + auto cur = range; + while (cur != nullptr && !cur->Covers(safe_point_pos)) { cur = cur->next(); } - if (cur == NULL) continue; + if (cur == nullptr) continue; // Check if the live range is spilled and the safe point is after // the spill position. @@ -1900,43 +1879,43 @@ void RegisterAllocator::AllocateDoubleRegisters() { void RegisterAllocator::AllocateRegisters() { - DCHECK(unhandled_live_ranges_.is_empty()); + DCHECK(unhandled_live_ranges().empty()); - for (size_t i = 0; i < live_ranges_.size(); ++i) { - if (live_ranges_[i] != NULL) { - if (live_ranges_[i]->Kind() == mode_) { - AddToUnhandledUnsorted(live_ranges_[i]); - } + for (auto range : live_ranges()) { + if (range == nullptr) continue; + if (range->Kind() == mode_) { + AddToUnhandledUnsorted(range); } } SortUnhandled(); DCHECK(UnhandledIsSorted()); - DCHECK(reusable_slots_.is_empty()); - DCHECK(active_live_ranges_.is_empty()); - DCHECK(inactive_live_ranges_.is_empty()); + DCHECK(reusable_slots().empty()); + DCHECK(active_live_ranges().empty()); + DCHECK(inactive_live_ranges().empty()); if (mode_ == DOUBLE_REGISTERS) { for (int i = 0; i < config()->num_aliased_double_registers(); ++i) { - LiveRange* current = fixed_double_live_ranges_.at(i); - if (current != NULL) { + auto current = fixed_double_live_ranges()[i]; + if (current != nullptr) { AddToInactive(current); } } } else { DCHECK(mode_ == GENERAL_REGISTERS); for (auto current : fixed_live_ranges()) { - if (current != NULL) { + if (current != nullptr) { AddToInactive(current); } } } - while (!unhandled_live_ranges_.is_empty()) { + while (!unhandled_live_ranges().empty()) { DCHECK(UnhandledIsSorted()); - LiveRange* current = unhandled_live_ranges_.RemoveLast(); + auto current = unhandled_live_ranges().back(); + unhandled_live_ranges().pop_back(); DCHECK(UnhandledIsSorted()); - LifetimePosition position = current->Start(); + auto position = current->Start(); #ifdef DEBUG allocation_finger_ = position; #endif @@ -1945,14 +1924,14 @@ void RegisterAllocator::AllocateRegisters() { if (!current->HasNoSpillType()) { TraceAlloc("Live range %d already has a spill operand\n", current->id()); - LifetimePosition next_pos = position; + auto next_pos = position; if (code()->IsGapAt(next_pos.InstructionIndex())) { next_pos = next_pos.NextInstruction(); } - UsePosition* pos = current->NextUsePositionRegisterIsBeneficial(next_pos); + auto pos = current->NextUsePositionRegisterIsBeneficial(next_pos); // If the range already has a spill operand and it doesn't need a // register immediately, split it and spill the first part of the range. - if (pos == NULL) { + if (pos == nullptr) { Spill(current); continue; } else if (pos->pos().Value() > @@ -1973,8 +1952,8 @@ void RegisterAllocator::AllocateRegisters() { if (!AllocationOk()) return; } - for (int i = 0; i < active_live_ranges_.length(); ++i) { - LiveRange* cur_active = active_live_ranges_.at(i); + for (size_t i = 0; i < active_live_ranges().size(); ++i) { + auto cur_active = active_live_ranges()[i]; if (cur_active->End().Value() <= position.Value()) { ActiveToHandled(cur_active); --i; // The live range was removed from the list of active live ranges. @@ -1984,8 +1963,8 @@ void RegisterAllocator::AllocateRegisters() { } } - for (int i = 0; i < inactive_live_ranges_.length(); ++i) { - LiveRange* cur_inactive = inactive_live_ranges_.at(i); + for (size_t i = 0; i < inactive_live_ranges().size(); ++i) { + auto cur_inactive = inactive_live_ranges()[i]; if (cur_inactive->End().Value() <= position.Value()) { InactiveToHandled(cur_inactive); --i; // Live range was removed from the list of inactive live ranges. @@ -2008,9 +1987,9 @@ void RegisterAllocator::AllocateRegisters() { } } - reusable_slots_.Rewind(0); - active_live_ranges_.Rewind(0); - inactive_live_ranges_.Rewind(0); + reusable_slots().clear(); + active_live_ranges().clear(); + inactive_live_ranges().clear(); } @@ -2037,49 +2016,49 @@ RegisterKind RegisterAllocator::RequiredRegisterKind( void RegisterAllocator::AddToActive(LiveRange* range) { TraceAlloc("Add live range %d to active\n", range->id()); - active_live_ranges_.Add(range, local_zone()); + active_live_ranges().push_back(range); } void RegisterAllocator::AddToInactive(LiveRange* range) { TraceAlloc("Add live range %d to inactive\n", range->id()); - inactive_live_ranges_.Add(range, local_zone()); + inactive_live_ranges().push_back(range); } void RegisterAllocator::AddToUnhandledSorted(LiveRange* range) { - if (range == NULL || range->IsEmpty()) return; + if (range == nullptr || range->IsEmpty()) return; DCHECK(!range->HasRegisterAssigned() && !range->IsSpilled()); DCHECK(allocation_finger_.Value() <= range->Start().Value()); - for (int i = unhandled_live_ranges_.length() - 1; i >= 0; --i) { - LiveRange* cur_range = unhandled_live_ranges_.at(i); - if (range->ShouldBeAllocatedBefore(cur_range)) { - TraceAlloc("Add live range %d to unhandled at %d\n", range->id(), i + 1); - unhandled_live_ranges_.InsertAt(i + 1, range, local_zone()); - DCHECK(UnhandledIsSorted()); - return; - } + for (int i = static_cast(unhandled_live_ranges().size() - 1); i >= 0; + --i) { + auto cur_range = unhandled_live_ranges().at(i); + if (!range->ShouldBeAllocatedBefore(cur_range)) continue; + TraceAlloc("Add live range %d to unhandled at %d\n", range->id(), i + 1); + auto it = unhandled_live_ranges().begin() + (i + 1); + unhandled_live_ranges().insert(it, range); + DCHECK(UnhandledIsSorted()); + return; } TraceAlloc("Add live range %d to unhandled at start\n", range->id()); - unhandled_live_ranges_.InsertAt(0, range, local_zone()); + unhandled_live_ranges().insert(unhandled_live_ranges().begin(), range); DCHECK(UnhandledIsSorted()); } void RegisterAllocator::AddToUnhandledUnsorted(LiveRange* range) { - if (range == NULL || range->IsEmpty()) return; + if (range == nullptr || range->IsEmpty()) return; DCHECK(!range->HasRegisterAssigned() && !range->IsSpilled()); TraceAlloc("Add live range %d to unhandled unsorted at end\n", range->id()); - unhandled_live_ranges_.Add(range, local_zone()); + unhandled_live_ranges().push_back(range); } -static int UnhandledSortHelper(LiveRange* const* a, LiveRange* const* b) { - DCHECK(!(*a)->ShouldBeAllocatedBefore(*b) || - !(*b)->ShouldBeAllocatedBefore(*a)); - if ((*a)->ShouldBeAllocatedBefore(*b)) return 1; - if ((*b)->ShouldBeAllocatedBefore(*a)) return -1; - return (*a)->id() - (*b)->id(); +static bool UnhandledSortHelper(LiveRange* a, LiveRange* b) { + DCHECK(!a->ShouldBeAllocatedBefore(b) || !b->ShouldBeAllocatedBefore(a)); + if (a->ShouldBeAllocatedBefore(b)) return false; + if (b->ShouldBeAllocatedBefore(a)) return true; + return a->id() < b->id(); } @@ -2088,15 +2067,16 @@ static int UnhandledSortHelper(LiveRange* const* a, LiveRange* const* b) { // algorithm because it is efficient to remove elements from the end. void RegisterAllocator::SortUnhandled() { TraceAlloc("Sort unhandled\n"); - unhandled_live_ranges_.Sort(&UnhandledSortHelper); + std::sort(unhandled_live_ranges().begin(), unhandled_live_ranges().end(), + &UnhandledSortHelper); } bool RegisterAllocator::UnhandledIsSorted() { - int len = unhandled_live_ranges_.length(); - for (int i = 1; i < len; i++) { - LiveRange* a = unhandled_live_ranges_.at(i - 1); - LiveRange* b = unhandled_live_ranges_.at(i); + size_t len = unhandled_live_ranges().size(); + for (size_t i = 1; i < len; i++) { + auto a = unhandled_live_ranges().at(i - 1); + auto b = unhandled_live_ranges().at(i); if (a->Start().Value() < b->Start().Value()) return false; } return true; @@ -2106,60 +2086,53 @@ bool RegisterAllocator::UnhandledIsSorted() { void RegisterAllocator::FreeSpillSlot(LiveRange* range) { DCHECK(!FLAG_turbo_reuse_spill_slots); // Check that we are the last range. - if (range->next() != NULL) return; - + if (range->next() != nullptr) return; if (!range->TopLevel()->HasSpillOperand()) return; - - InstructionOperand* spill_operand = range->TopLevel()->GetSpillOperand(); + auto spill_operand = range->TopLevel()->GetSpillOperand(); if (spill_operand->IsConstant()) return; if (spill_operand->index() >= 0) { - reusable_slots_.Add(range, local_zone()); + reusable_slots().push_back(range); } } InstructionOperand* RegisterAllocator::TryReuseSpillSlot(LiveRange* range) { DCHECK(!FLAG_turbo_reuse_spill_slots); - if (reusable_slots_.is_empty()) return NULL; - if (reusable_slots_.first()->End().Value() > + if (reusable_slots().empty()) return nullptr; + if (reusable_slots().front()->End().Value() > range->TopLevel()->Start().Value()) { - return NULL; + return nullptr; } - InstructionOperand* result = - reusable_slots_.first()->TopLevel()->GetSpillOperand(); - reusable_slots_.Remove(0); + auto result = reusable_slots().front()->TopLevel()->GetSpillOperand(); + reusable_slots().erase(reusable_slots().begin()); return result; } void RegisterAllocator::ActiveToHandled(LiveRange* range) { - DCHECK(active_live_ranges_.Contains(range)); - active_live_ranges_.RemoveElement(range); + RemoveElement(&active_live_ranges(), range); TraceAlloc("Moving live range %d from active to handled\n", range->id()); if (!FLAG_turbo_reuse_spill_slots) FreeSpillSlot(range); } void RegisterAllocator::ActiveToInactive(LiveRange* range) { - DCHECK(active_live_ranges_.Contains(range)); - active_live_ranges_.RemoveElement(range); - inactive_live_ranges_.Add(range, local_zone()); + RemoveElement(&active_live_ranges(), range); + inactive_live_ranges().push_back(range); TraceAlloc("Moving live range %d from active to inactive\n", range->id()); } void RegisterAllocator::InactiveToHandled(LiveRange* range) { - DCHECK(inactive_live_ranges_.Contains(range)); - inactive_live_ranges_.RemoveElement(range); + RemoveElement(&inactive_live_ranges(), range); TraceAlloc("Moving live range %d from inactive to handled\n", range->id()); if (!FLAG_turbo_reuse_spill_slots) FreeSpillSlot(range); } void RegisterAllocator::InactiveToActive(LiveRange* range) { - DCHECK(inactive_live_ranges_.Contains(range)); - inactive_live_ranges_.RemoveElement(range); - active_live_ranges_.Add(range, local_zone()); + RemoveElement(&inactive_live_ranges(), range); + active_live_ranges().push_back(range); TraceAlloc("Moving live range %d from inactive to active\n", range->id()); } @@ -2171,24 +2144,21 @@ bool RegisterAllocator::TryAllocateFreeReg(LiveRange* current) { free_until_pos[i] = LifetimePosition::MaxPosition(); } - for (int i = 0; i < active_live_ranges_.length(); ++i) { - LiveRange* cur_active = active_live_ranges_.at(i); + for (auto cur_active : active_live_ranges()) { free_until_pos[cur_active->assigned_register()] = LifetimePosition::FromInstructionIndex(0); } - for (int i = 0; i < inactive_live_ranges_.length(); ++i) { - LiveRange* cur_inactive = inactive_live_ranges_.at(i); + for (auto cur_inactive : inactive_live_ranges()) { DCHECK(cur_inactive->End().Value() > current->Start().Value()); - LifetimePosition next_intersection = - cur_inactive->FirstIntersection(current); + auto next_intersection = cur_inactive->FirstIntersection(current); if (!next_intersection.IsValid()) continue; int cur_reg = cur_inactive->assigned_register(); free_until_pos[cur_reg] = Min(free_until_pos[cur_reg], next_intersection); } - InstructionOperand* hint = current->FirstHint(); - if (hint != NULL && (hint->IsRegister() || hint->IsDoubleRegister())) { + auto hint = current->FirstHint(); + if (hint != nullptr && (hint->IsRegister() || hint->IsDoubleRegister())) { int register_index = hint->index(); TraceAlloc( "Found reg hint %s (free until [%d) for live range %d (end %d[).\n", @@ -2212,7 +2182,7 @@ bool RegisterAllocator::TryAllocateFreeReg(LiveRange* current) { } } - LifetimePosition pos = free_until_pos[reg]; + auto pos = free_until_pos[reg]; if (pos.Value() <= current->Start().Value()) { // All registers are blocked. @@ -2222,12 +2192,11 @@ bool RegisterAllocator::TryAllocateFreeReg(LiveRange* current) { if (pos.Value() < current->End().Value()) { // Register reg is available at the range start but becomes blocked before // the range end. Split current at position where it becomes blocked. - LiveRange* tail = SplitRangeAt(current, pos); + auto tail = SplitRangeAt(current, pos); if (!AllocationOk()) return false; AddToUnhandledSorted(tail); } - // Register reg is available at the range start and is free until // the range end. DCHECK(pos.Value() >= current->End().Value()); @@ -2240,8 +2209,8 @@ bool RegisterAllocator::TryAllocateFreeReg(LiveRange* current) { void RegisterAllocator::AllocateBlockedReg(LiveRange* current) { - UsePosition* register_use = current->NextRegisterPosition(current->Start()); - if (register_use == NULL) { + auto register_use = current->NextRegisterPosition(current->Start()); + if (register_use == nullptr) { // There is no use in the current live range that requires a register. // We can just spill it. Spill(current); @@ -2255,16 +2224,15 @@ void RegisterAllocator::AllocateBlockedReg(LiveRange* current) { use_pos[i] = block_pos[i] = LifetimePosition::MaxPosition(); } - for (int i = 0; i < active_live_ranges_.length(); ++i) { - LiveRange* range = active_live_ranges_[i]; + for (auto range : active_live_ranges()) { int cur_reg = range->assigned_register(); if (range->IsFixed() || !range->CanBeSpilled(current->Start())) { block_pos[cur_reg] = use_pos[cur_reg] = LifetimePosition::FromInstructionIndex(0); } else { - UsePosition* next_use = + auto next_use = range->NextUsePositionRegisterIsBeneficial(current->Start()); - if (next_use == NULL) { + if (next_use == nullptr) { use_pos[cur_reg] = range->End(); } else { use_pos[cur_reg] = next_use->pos(); @@ -2272,10 +2240,9 @@ void RegisterAllocator::AllocateBlockedReg(LiveRange* current) { } } - for (int i = 0; i < inactive_live_ranges_.length(); ++i) { - LiveRange* range = inactive_live_ranges_.at(i); + for (auto range : inactive_live_ranges()) { DCHECK(range->End().Value() > current->Start().Value()); - LifetimePosition next_intersection = range->FirstIntersection(current); + auto next_intersection = range->FirstIntersection(current); if (!next_intersection.IsValid()) continue; int cur_reg = range->assigned_register(); if (range->IsFixed()) { @@ -2293,7 +2260,7 @@ void RegisterAllocator::AllocateBlockedReg(LiveRange* current) { } } - LifetimePosition pos = use_pos[reg]; + auto pos = use_pos[reg]; if (pos.Value() < register_use->pos().Value()) { // All registers are blocked before the first use that requires a register. @@ -2326,31 +2293,31 @@ void RegisterAllocator::AllocateBlockedReg(LiveRange* current) { static const InstructionBlock* GetContainingLoop( const InstructionSequence* sequence, const InstructionBlock* block) { - BasicBlock::RpoNumber index = block->loop_header(); - if (!index.IsValid()) return NULL; + auto index = block->loop_header(); + if (!index.IsValid()) return nullptr; return sequence->InstructionBlockAt(index); } LifetimePosition RegisterAllocator::FindOptimalSpillingPos( LiveRange* range, LifetimePosition pos) { - const InstructionBlock* block = GetInstructionBlock(pos.InstructionStart()); - const InstructionBlock* loop_header = + auto block = GetInstructionBlock(pos.InstructionStart()); + auto loop_header = block->IsLoopHeader() ? block : GetContainingLoop(code(), block); - if (loop_header == NULL) return pos; + if (loop_header == nullptr) return pos; - UsePosition* prev_use = range->PreviousUsePositionRegisterIsBeneficial(pos); + auto prev_use = range->PreviousUsePositionRegisterIsBeneficial(pos); - while (loop_header != NULL) { + while (loop_header != nullptr) { // We are going to spill live range inside the loop. // If possible try to move spilling position backwards to loop header. // This will reduce number of memory moves on the back edge. - LifetimePosition loop_start = LifetimePosition::FromInstructionIndex( + auto loop_start = LifetimePosition::FromInstructionIndex( loop_header->first_instruction_index()); if (range->Covers(loop_start)) { - if (prev_use == NULL || prev_use->pos().Value() < loop_start.Value()) { + if (prev_use == nullptr || prev_use->pos().Value() < loop_start.Value()) { // No register beneficial use inside the loop before the pos. pos = loop_start; } @@ -2367,13 +2334,13 @@ LifetimePosition RegisterAllocator::FindOptimalSpillingPos( void RegisterAllocator::SplitAndSpillIntersecting(LiveRange* current) { DCHECK(current->HasRegisterAssigned()); int reg = current->assigned_register(); - LifetimePosition split_pos = current->Start(); - for (int i = 0; i < active_live_ranges_.length(); ++i) { - LiveRange* range = active_live_ranges_[i]; + auto split_pos = current->Start(); + for (size_t i = 0; i < active_live_ranges().size(); ++i) { + auto range = active_live_ranges()[i]; if (range->assigned_register() == reg) { - UsePosition* next_pos = range->NextRegisterPosition(current->Start()); - LifetimePosition spill_pos = FindOptimalSpillingPos(range, split_pos); - if (next_pos == NULL) { + auto next_pos = range->NextRegisterPosition(current->Start()); + auto spill_pos = FindOptimalSpillingPos(range, split_pos); + if (next_pos == nullptr) { SpillAfter(range, spill_pos); } else { // When spilling between spill_pos and next_pos ensure that the range @@ -2392,14 +2359,14 @@ void RegisterAllocator::SplitAndSpillIntersecting(LiveRange* current) { } } - for (int i = 0; i < inactive_live_ranges_.length(); ++i) { - LiveRange* range = inactive_live_ranges_[i]; + for (size_t i = 0; i < inactive_live_ranges().size(); ++i) { + auto range = inactive_live_ranges()[i]; DCHECK(range->End().Value() > current->Start().Value()); if (range->assigned_register() == reg && !range->IsFixed()) { LifetimePosition next_intersection = range->FirstIntersection(current); if (next_intersection.IsValid()) { UsePosition* next_pos = range->NextRegisterPosition(current->Start()); - if (next_pos == NULL) { + if (next_pos == nullptr) { SpillAfter(range, split_pos); } else { next_intersection = Min(next_intersection, next_pos->pos()); @@ -2433,8 +2400,8 @@ LiveRange* RegisterAllocator::SplitRangeAt(LiveRange* range, !InstructionAt(pos.InstructionIndex())->IsControl()); int vreg = GetVirtualRegister(); - if (!AllocationOk()) return NULL; - LiveRange* result = LiveRangeFor(vreg); + if (!AllocationOk()) return nullptr; + auto result = LiveRangeFor(vreg); range->SplitAt(pos, result, local_zone()); return result; } @@ -2447,7 +2414,7 @@ LiveRange* RegisterAllocator::SplitBetween(LiveRange* range, TraceAlloc("Splitting live range %d in position between [%d, %d]\n", range->id(), start.Value(), end.Value()); - LifetimePosition split_pos = FindOptimalSplitPos(start, end); + auto split_pos = FindOptimalSplitPos(start, end); DCHECK(split_pos.Value() >= start.Value()); return SplitRangeAt(range, split_pos); } @@ -2462,8 +2429,8 @@ LifetimePosition RegisterAllocator::FindOptimalSplitPos(LifetimePosition start, // We have no choice if (start_instr == end_instr) return end; - const InstructionBlock* start_block = GetInstructionBlock(start); - const InstructionBlock* end_block = GetInstructionBlock(end); + auto start_block = GetInstructionBlock(start); + auto end_block = GetInstructionBlock(end); if (end_block == start_block) { // The interval is split in the same basic block. Split at the latest @@ -2471,10 +2438,10 @@ LifetimePosition RegisterAllocator::FindOptimalSplitPos(LifetimePosition start, return end; } - const InstructionBlock* block = end_block; + auto block = end_block; // Find header of outermost loop. // TODO(titzer): fix redundancy below. - while (GetContainingLoop(code(), block) != NULL && + while (GetContainingLoop(code(), block) != nullptr && GetContainingLoop(code(), block)->rpo_number().ToInt() > start_block->rpo_number().ToInt()) { block = GetContainingLoop(code(), block); @@ -2490,7 +2457,7 @@ LifetimePosition RegisterAllocator::FindOptimalSplitPos(LifetimePosition start, void RegisterAllocator::SpillAfter(LiveRange* range, LifetimePosition pos) { - LiveRange* second_part = SplitRangeAt(range, pos); + auto second_part = SplitRangeAt(range, pos); if (!AllocationOk()) return; Spill(second_part); } @@ -2507,14 +2474,14 @@ void RegisterAllocator::SpillBetweenUntil(LiveRange* range, LifetimePosition until, LifetimePosition end) { CHECK(start.Value() < end.Value()); - LiveRange* second_part = SplitRangeAt(range, start); + auto second_part = SplitRangeAt(range, start); if (!AllocationOk()) return; if (second_part->Start().Value() < end.Value()) { // The split result intersects with [start, end[. // Split it at position between ]start+1, end[, spill the middle part // and put the rest to unhandled. - LiveRange* third_part = SplitBetween( + auto third_part = SplitBetween( second_part, Max(second_part->Start().InstructionEnd(), until), end.PrevInstruction().InstructionEnd()); if (!AllocationOk()) return; @@ -2534,13 +2501,13 @@ void RegisterAllocator::SpillBetweenUntil(LiveRange* range, void RegisterAllocator::Spill(LiveRange* range) { DCHECK(!range->IsSpilled()); TraceAlloc("Spilling live range %d\n", range->id()); - LiveRange* first = range->TopLevel(); + auto first = range->TopLevel(); if (first->HasNoSpillType()) { if (FLAG_turbo_reuse_spill_slots) { AssignSpillRangeToLiveRange(first); } else { - InstructionOperand* op = TryReuseSpillSlot(range); - if (op == NULL) { + auto op = TryReuseSpillSlot(range); + if (op == nullptr) { // Allocate a new operand referring to the spill slot. RegisterKind kind = range->Kind(); int index = frame()->AllocateSpillSlot(kind == DOUBLE_REGISTERS); @@ -2564,7 +2531,7 @@ int RegisterAllocator::RegisterCount() const { return num_registers_; } void RegisterAllocator::Verify() const { for (auto current : live_ranges()) { - if (current != NULL) current->Verify(); + if (current != nullptr) current->Verify(); } } diff --git a/src/compiler/register-allocator.h b/src/compiler/register-allocator.h index 851acb2..2db5189 100644 --- a/src/compiler/register-allocator.h +++ b/src/compiler/register-allocator.h @@ -452,7 +452,6 @@ class RegisterAllocator FINAL : public ZoneObject { bool SafePointsAreInOrder() const; // Liveness analysis support. - void InitializeLivenessAnalysis(); BitVector* ComputeLiveOut(const InstructionBlock* block); void AddInitialIntervals(const InstructionBlock* block, BitVector* live_out); bool IsOutputRegisterOf(Instruction* instr, int index); @@ -569,6 +568,20 @@ class RegisterAllocator FINAL : public ZoneObject { Frame* frame() const { return frame_; } const char* debug_name() const { return debug_name_; } const RegisterConfiguration* config() const { return config_; } + ZoneVector& live_ranges() { return live_ranges_; } + ZoneVector& fixed_live_ranges() { return fixed_live_ranges_; } + ZoneVector& fixed_double_live_ranges() { + return fixed_double_live_ranges_; + } + ZoneVector& unhandled_live_ranges() { + return unhandled_live_ranges_; + } + ZoneVector& active_live_ranges() { return active_live_ranges_; } + ZoneVector& inactive_live_ranges() { + return inactive_live_ranges_; + } + ZoneVector& reusable_slots() { return reusable_slots_; } + ZoneVector& spill_ranges() { return spill_ranges_; } struct PhiMapValue { PhiMapValue(PhiInstruction* phi, const InstructionBlock* block) @@ -598,11 +611,11 @@ class RegisterAllocator FINAL : public ZoneObject { // Lists of live ranges ZoneVector fixed_live_ranges_; ZoneVector fixed_double_live_ranges_; - ZoneList unhandled_live_ranges_; - ZoneList active_live_ranges_; - ZoneList inactive_live_ranges_; - ZoneList reusable_slots_; - ZoneList spill_ranges_; + ZoneVector unhandled_live_ranges_; + ZoneVector active_live_ranges_; + ZoneVector inactive_live_ranges_; + ZoneVector reusable_slots_; + ZoneVector spill_ranges_; RegisterKind mode_; int num_registers_; -- 2.7.4