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Issue 39973003: Merge bleeding_edge. (Closed) Base URL: https://v8.googlecode.com/svn/branches/experimental/parser
Patch Set: again Created 7 years, 1 month ago
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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 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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149 // ----------- S t a t e ------------- 149 // ----------- S t a t e -------------
150 // -- a0 : value 150 // -- a0 : value
151 // -- a1 : key 151 // -- a1 : key
152 // -- a2 : receiver 152 // -- a2 : receiver
153 // -- ra : return address 153 // -- ra : return address
154 // -- a3 : target map, scratch for subsequent call 154 // -- a3 : target map, scratch for subsequent call
155 // -- t0 : scratch (elements) 155 // -- t0 : scratch (elements)
156 // ----------------------------------- 156 // -----------------------------------
157 if (mode == TRACK_ALLOCATION_SITE) { 157 if (mode == TRACK_ALLOCATION_SITE) {
158 ASSERT(allocation_memento_found != NULL); 158 ASSERT(allocation_memento_found != NULL);
159 masm->TestJSArrayForAllocationMemento(a2, t0, eq, 159 __ JumpIfJSArrayHasAllocationMemento(a2, t0, allocation_memento_found);
160 allocation_memento_found);
161 } 160 }
162 161
163 // Set transitioned map. 162 // Set transitioned map.
164 __ sw(a3, FieldMemOperand(a2, HeapObject::kMapOffset)); 163 __ sw(a3, FieldMemOperand(a2, HeapObject::kMapOffset));
165 __ RecordWriteField(a2, 164 __ RecordWriteField(a2,
166 HeapObject::kMapOffset, 165 HeapObject::kMapOffset,
167 a3, 166 a3,
168 t5, 167 t5,
169 kRAHasNotBeenSaved, 168 kRAHasNotBeenSaved,
170 kDontSaveFPRegs, 169 kDontSaveFPRegs,
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181 // -- a2 : receiver 180 // -- a2 : receiver
182 // -- ra : return address 181 // -- ra : return address
183 // -- a3 : target map, scratch for subsequent call 182 // -- a3 : target map, scratch for subsequent call
184 // -- t0 : scratch (elements) 183 // -- t0 : scratch (elements)
185 // ----------------------------------- 184 // -----------------------------------
186 Label loop, entry, convert_hole, gc_required, only_change_map, done; 185 Label loop, entry, convert_hole, gc_required, only_change_map, done;
187 186
188 Register scratch = t6; 187 Register scratch = t6;
189 188
190 if (mode == TRACK_ALLOCATION_SITE) { 189 if (mode == TRACK_ALLOCATION_SITE) {
191 masm->TestJSArrayForAllocationMemento(a2, t0, eq, fail); 190 __ JumpIfJSArrayHasAllocationMemento(a2, t0, fail);
192 } 191 }
193 192
194 // Check for empty arrays, which only require a map transition and no changes 193 // Check for empty arrays, which only require a map transition and no changes
195 // to the backing store. 194 // to the backing store.
196 __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset)); 195 __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset));
197 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); 196 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex);
198 __ Branch(&only_change_map, eq, at, Operand(t0)); 197 __ Branch(&only_change_map, eq, at, Operand(t0));
199 198
200 __ push(ra); 199 __ push(ra);
201 __ lw(t1, FieldMemOperand(t0, FixedArray::kLengthOffset)); 200 __ lw(t1, FieldMemOperand(t0, FixedArray::kLengthOffset));
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309 // -- a0 : value 308 // -- a0 : value
310 // -- a1 : key 309 // -- a1 : key
311 // -- a2 : receiver 310 // -- a2 : receiver
312 // -- ra : return address 311 // -- ra : return address
313 // -- a3 : target map, scratch for subsequent call 312 // -- a3 : target map, scratch for subsequent call
314 // -- t0 : scratch (elements) 313 // -- t0 : scratch (elements)
315 // ----------------------------------- 314 // -----------------------------------
316 Label entry, loop, convert_hole, gc_required, only_change_map; 315 Label entry, loop, convert_hole, gc_required, only_change_map;
317 316
318 if (mode == TRACK_ALLOCATION_SITE) { 317 if (mode == TRACK_ALLOCATION_SITE) {
319 masm->TestJSArrayForAllocationMemento(a2, t0, eq, fail); 318 __ JumpIfJSArrayHasAllocationMemento(a2, t0, fail);
320 } 319 }
321 320
322 // Check for empty arrays, which only require a map transition and no changes 321 // Check for empty arrays, which only require a map transition and no changes
323 // to the backing store. 322 // to the backing store.
324 __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset)); 323 __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset));
325 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); 324 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex);
326 __ Branch(&only_change_map, eq, at, Operand(t0)); 325 __ Branch(&only_change_map, eq, at, Operand(t0));
327 326
328 __ MultiPush(a0.bit() | a1.bit() | a2.bit() | a3.bit() | ra.bit()); 327 __ MultiPush(a0.bit() | a1.bit() | a2.bit() | a3.bit() | ra.bit());
329 328
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632 bool result = !memcmp(sequence, young_sequence, young_length); 631 bool result = !memcmp(sequence, young_sequence, young_length);
633 ASSERT(result || 632 ASSERT(result ||
634 Memory::uint32_at(sequence) == kCodeAgePatchFirstInstruction); 633 Memory::uint32_at(sequence) == kCodeAgePatchFirstInstruction);
635 return result; 634 return result;
636 } 635 }
637 636
638 637
639 void Code::GetCodeAgeAndParity(byte* sequence, Age* age, 638 void Code::GetCodeAgeAndParity(byte* sequence, Age* age,
640 MarkingParity* parity) { 639 MarkingParity* parity) {
641 if (IsYoungSequence(sequence)) { 640 if (IsYoungSequence(sequence)) {
642 *age = kNoAge; 641 *age = kNoAgeCodeAge;
643 *parity = NO_MARKING_PARITY; 642 *parity = NO_MARKING_PARITY;
644 } else { 643 } else {
645 Address target_address = Memory::Address_at( 644 Address target_address = Memory::Address_at(
646 sequence + Assembler::kInstrSize * (kNoCodeAgeSequenceLength - 1)); 645 sequence + Assembler::kInstrSize * (kNoCodeAgeSequenceLength - 1));
647 Code* stub = GetCodeFromTargetAddress(target_address); 646 Code* stub = GetCodeFromTargetAddress(target_address);
648 GetCodeAgeAndParity(stub, age, parity); 647 GetCodeAgeAndParity(stub, age, parity);
649 } 648 }
650 } 649 }
651 650
652 651
653 void Code::PatchPlatformCodeAge(Isolate* isolate, 652 void Code::PatchPlatformCodeAge(Isolate* isolate,
654 byte* sequence, 653 byte* sequence,
655 Code::Age age, 654 Code::Age age,
656 MarkingParity parity) { 655 MarkingParity parity) {
657 uint32_t young_length; 656 uint32_t young_length;
658 byte* young_sequence = GetNoCodeAgeSequence(&young_length); 657 byte* young_sequence = GetNoCodeAgeSequence(&young_length);
659 if (age == kNoAge) { 658 if (age == kNoAgeCodeAge) {
660 CopyBytes(sequence, young_sequence, young_length); 659 CopyBytes(sequence, young_sequence, young_length);
661 CPU::FlushICache(sequence, young_length); 660 CPU::FlushICache(sequence, young_length);
662 } else { 661 } else {
663 Code* stub = GetCodeAgeStub(isolate, age, parity); 662 Code* stub = GetCodeAgeStub(isolate, age, parity);
664 CodePatcher patcher(sequence, young_length / Assembler::kInstrSize); 663 CodePatcher patcher(sequence, young_length / Assembler::kInstrSize);
665 // Mark this code sequence for FindPlatformCodeAgeSequence() 664 // Mark this code sequence for FindPlatformCodeAgeSequence()
666 patcher.masm()->nop(Assembler::CODE_AGE_MARKER_NOP); 665 patcher.masm()->nop(Assembler::CODE_AGE_MARKER_NOP);
667 // Save the function's original return address 666 // Save the function's original return address
668 // (it will be clobbered by Call(t9)) 667 // (it will be clobbered by Call(t9))
669 patcher.masm()->mov(at, ra); 668 patcher.masm()->mov(at, ra);
670 // Load the stub address to t9 and call it 669 // Load the stub address to t9 and call it
671 patcher.masm()->li(t9, 670 patcher.masm()->li(t9,
672 Operand(reinterpret_cast<uint32_t>(stub->instruction_start()))); 671 Operand(reinterpret_cast<uint32_t>(stub->instruction_start())));
673 patcher.masm()->Call(t9); 672 patcher.masm()->Call(t9);
674 // Record the stub address in the empty space for GetCodeAgeAndParity() 673 // Record the stub address in the empty space for GetCodeAgeAndParity()
675 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start())); 674 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start()));
676 } 675 }
677 } 676 }
678 677
679 678
680 #undef __ 679 #undef __
681 680
682 } } // namespace v8::internal 681 } } // namespace v8::internal
683 682
684 #endif // V8_TARGET_ARCH_MIPS 683 #endif // V8_TARGET_ARCH_MIPS
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