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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "src/v8.h" | 5 #include "src/v8.h" |
| 6 | 6 |
| 7 #include "src/ast.h" | 7 #include "src/ast.h" |
| 8 #include "src/base/platform/platform.h" | 8 #include "src/base/platform/platform.h" |
| 9 #include "src/compilation-cache.h" | 9 #include "src/compilation-cache.h" |
| 10 #include "src/compiler.h" | 10 #include "src/compiler.h" |
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| 3439 } | 3439 } |
| 3440 length += node_length; | 3440 length += node_length; |
| 3441 SeqRegExpNode* seq_node = static_cast<SeqRegExpNode*>(node); | 3441 SeqRegExpNode* seq_node = static_cast<SeqRegExpNode*>(node); |
| 3442 node = seq_node->on_success(); | 3442 node = seq_node->on_success(); |
| 3443 } | 3443 } |
| 3444 return length; | 3444 return length; |
| 3445 } | 3445 } |
| 3446 | 3446 |
| 3447 | 3447 |
| 3448 void LoopChoiceNode::AddLoopAlternative(GuardedAlternative alt) { | 3448 void LoopChoiceNode::AddLoopAlternative(GuardedAlternative alt) { |
| 3449 DCHECK_EQ(loop_node_, NULL); | 3449 DCHECK_NULL(loop_node_); |
| 3450 AddAlternative(alt); | 3450 AddAlternative(alt); |
| 3451 loop_node_ = alt.node(); | 3451 loop_node_ = alt.node(); |
| 3452 } | 3452 } |
| 3453 | 3453 |
| 3454 | 3454 |
| 3455 void LoopChoiceNode::AddContinueAlternative(GuardedAlternative alt) { | 3455 void LoopChoiceNode::AddContinueAlternative(GuardedAlternative alt) { |
| 3456 DCHECK_EQ(continue_node_, NULL); | 3456 DCHECK_NULL(continue_node_); |
| 3457 AddAlternative(alt); | 3457 AddAlternative(alt); |
| 3458 continue_node_ = alt.node(); | 3458 continue_node_ = alt.node(); |
| 3459 } | 3459 } |
| 3460 | 3460 |
| 3461 | 3461 |
| 3462 void LoopChoiceNode::Emit(RegExpCompiler* compiler, Trace* trace) { | 3462 void LoopChoiceNode::Emit(RegExpCompiler* compiler, Trace* trace) { |
| 3463 RegExpMacroAssembler* macro_assembler = compiler->macro_assembler(); | 3463 RegExpMacroAssembler* macro_assembler = compiler->macro_assembler(); |
| 3464 if (trace->stop_node() == this) { | 3464 if (trace->stop_node() == this) { |
| 3465 // Back edge of greedy optimized loop node graph. | 3465 // Back edge of greedy optimized loop node graph. |
| 3466 int text_length = | 3466 int text_length = |
| 3467 GreedyLoopTextLengthForAlternative(&(alternatives_->at(0))); | 3467 GreedyLoopTextLengthForAlternative(&(alternatives_->at(0))); |
| 3468 DCHECK(text_length != kNodeIsTooComplexForGreedyLoops); | 3468 DCHECK(text_length != kNodeIsTooComplexForGreedyLoops); |
| 3469 // Update the counter-based backtracking info on the stack. This is an | 3469 // Update the counter-based backtracking info on the stack. This is an |
| 3470 // optimization for greedy loops (see below). | 3470 // optimization for greedy loops (see below). |
| 3471 DCHECK(trace->cp_offset() == text_length); | 3471 DCHECK(trace->cp_offset() == text_length); |
| 3472 macro_assembler->AdvanceCurrentPosition(text_length); | 3472 macro_assembler->AdvanceCurrentPosition(text_length); |
| 3473 macro_assembler->GoTo(trace->loop_label()); | 3473 macro_assembler->GoTo(trace->loop_label()); |
| 3474 return; | 3474 return; |
| 3475 } | 3475 } |
| 3476 DCHECK(trace->stop_node() == NULL); | 3476 DCHECK_NULL(trace->stop_node()); |
| 3477 if (!trace->is_trivial()) { | 3477 if (!trace->is_trivial()) { |
| 3478 trace->Flush(compiler, this); | 3478 trace->Flush(compiler, this); |
| 3479 return; | 3479 return; |
| 3480 } | 3480 } |
| 3481 ChoiceNode::Emit(compiler, trace); | 3481 ChoiceNode::Emit(compiler, trace); |
| 3482 } | 3482 } |
| 3483 | 3483 |
| 3484 | 3484 |
| 3485 int ChoiceNode::CalculatePreloadCharacters(RegExpCompiler* compiler, | 3485 int ChoiceNode::CalculatePreloadCharacters(RegExpCompiler* compiler, |
| 3486 int eats_at_least) { | 3486 int eats_at_least) { |
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| 5287 if (*target == NULL) *target = new(zone_) ZoneList<CharacterRange>(2, zone_); | 5287 if (*target == NULL) *target = new(zone_) ZoneList<CharacterRange>(2, zone_); |
| 5288 (*target)->Add(CharacterRange(entry.from(), entry.to()), zone_); | 5288 (*target)->Add(CharacterRange(entry.from(), entry.to()), zone_); |
| 5289 } | 5289 } |
| 5290 | 5290 |
| 5291 | 5291 |
| 5292 void CharacterRange::Split(ZoneList<CharacterRange>* base, | 5292 void CharacterRange::Split(ZoneList<CharacterRange>* base, |
| 5293 Vector<const int> overlay, | 5293 Vector<const int> overlay, |
| 5294 ZoneList<CharacterRange>** included, | 5294 ZoneList<CharacterRange>** included, |
| 5295 ZoneList<CharacterRange>** excluded, | 5295 ZoneList<CharacterRange>** excluded, |
| 5296 Zone* zone) { | 5296 Zone* zone) { |
| 5297 DCHECK_EQ(NULL, *included); | 5297 DCHECK_NULL(*included); |
| 5298 DCHECK_EQ(NULL, *excluded); | 5298 DCHECK_NULL(*excluded); |
| 5299 DispatchTable table(zone); | 5299 DispatchTable table(zone); |
| 5300 for (int i = 0; i < base->length(); i++) | 5300 for (int i = 0; i < base->length(); i++) |
| 5301 table.AddRange(base->at(i), CharacterRangeSplitter::kInBase, zone); | 5301 table.AddRange(base->at(i), CharacterRangeSplitter::kInBase, zone); |
| 5302 for (int i = 0; i < overlay.length(); i += 2) { | 5302 for (int i = 0; i < overlay.length(); i += 2) { |
| 5303 table.AddRange(CharacterRange(overlay[i], overlay[i + 1] - 1), | 5303 table.AddRange(CharacterRange(overlay[i], overlay[i + 1] - 1), |
| 5304 CharacterRangeSplitter::kInOverlay, zone); | 5304 CharacterRangeSplitter::kInOverlay, zone); |
| 5305 } | 5305 } |
| 5306 CharacterRangeSplitter callback(included, excluded, zone); | 5306 CharacterRangeSplitter callback(included, excluded, zone); |
| 5307 table.ForEach(&callback); | 5307 table.ForEach(&callback); |
| 5308 } | 5308 } |
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| 6153 Heap* heap = pattern->GetHeap(); | 6153 Heap* heap = pattern->GetHeap(); |
| 6154 bool too_much = pattern->length() > RegExpImpl::kRegExpTooLargeToOptimize; | 6154 bool too_much = pattern->length() > RegExpImpl::kRegExpTooLargeToOptimize; |
| 6155 if (heap->total_regexp_code_generated() > RegExpImpl::kRegExpCompiledLimit && | 6155 if (heap->total_regexp_code_generated() > RegExpImpl::kRegExpCompiledLimit && |
| 6156 heap->isolate()->memory_allocator()->SizeExecutable() > | 6156 heap->isolate()->memory_allocator()->SizeExecutable() > |
| 6157 RegExpImpl::kRegExpExecutableMemoryLimit) { | 6157 RegExpImpl::kRegExpExecutableMemoryLimit) { |
| 6158 too_much = true; | 6158 too_much = true; |
| 6159 } | 6159 } |
| 6160 return too_much; | 6160 return too_much; |
| 6161 } | 6161 } |
| 6162 }} // namespace v8::internal | 6162 }} // namespace v8::internal |
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