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Issue 22580003: MIPS: First implementation of allocation elimination in Hydrogen. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 4 months 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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584 translation->BeginSetterStubFrame(closure_id); 584 translation->BeginSetterStubFrame(closure_id);
585 break; 585 break;
586 case STUB: 586 case STUB:
587 translation->BeginCompiledStubFrame(); 587 translation->BeginCompiledStubFrame();
588 break; 588 break;
589 case ARGUMENTS_ADAPTOR: 589 case ARGUMENTS_ADAPTOR:
590 translation->BeginArgumentsAdaptorFrame(closure_id, translation_size); 590 translation->BeginArgumentsAdaptorFrame(closure_id, translation_size);
591 break; 591 break;
592 } 592 }
593 593
594 int object_index = 0;
595 int dematerialized_index = 0;
594 for (int i = 0; i < translation_size; ++i) { 596 for (int i = 0; i < translation_size; ++i) {
595 LOperand* value = environment->values()->at(i); 597 LOperand* value = environment->values()->at(i);
596 598 AddToTranslation(environment,
597 // TODO(mstarzinger): Introduce marker operands to indicate that this value 599 translation,
598 // is not present and must be reconstructed from the deoptimizer. Currently
599 // this is only used for the arguments object.
600 if (value == NULL) {
601 int arguments_count = environment->values()->length() - translation_size;
602 translation->BeginArgumentsObject(arguments_count);
603 for (int i = 0; i < arguments_count; ++i) {
604 LOperand* value = environment->values()->at(translation_size + i);
605 AddToTranslation(translation,
606 value,
607 environment->HasTaggedValueAt(translation_size + i),
608 environment->HasUint32ValueAt(translation_size + i));
609 }
610 continue;
611 }
612
613 AddToTranslation(translation,
614 value, 600 value,
615 environment->HasTaggedValueAt(i), 601 environment->HasTaggedValueAt(i),
616 environment->HasUint32ValueAt(i)); 602 environment->HasUint32ValueAt(i),
603 &object_index,
604 &dematerialized_index);
617 } 605 }
618 } 606 }
619 607
620 608
621 void LCodeGen::AddToTranslation(Translation* translation, 609 void LCodeGen::AddToTranslation(LEnvironment* environment,
610 Translation* translation,
622 LOperand* op, 611 LOperand* op,
623 bool is_tagged, 612 bool is_tagged,
624 bool is_uint32) { 613 bool is_uint32,
614 int* object_index_pointer,
615 int* dematerialized_index_pointer) {
616 if (op == LEnvironment::materialization_marker()) {
617 int object_index = (*object_index_pointer)++;
618 if (environment->ObjectIsDuplicateAt(object_index)) {
619 int dupe_of = environment->ObjectDuplicateOfAt(object_index);
620 translation->DuplicateObject(dupe_of);
621 return;
622 }
623 int object_length = environment->ObjectLengthAt(object_index);
624 if (environment->ObjectIsArgumentsAt(object_index)) {
625 translation->BeginArgumentsObject(object_length);
626 } else {
627 translation->BeginCapturedObject(object_length);
628 }
629 int dematerialized_index = *dematerialized_index_pointer;
630 int env_offset = environment->translation_size() + dematerialized_index;
631 *dematerialized_index_pointer += object_length;
632 for (int i = 0; i < object_length; ++i) {
633 LOperand* value = environment->values()->at(env_offset + i);
634 AddToTranslation(environment,
635 translation,
636 value,
637 environment->HasTaggedValueAt(env_offset + i),
638 environment->HasUint32ValueAt(env_offset + i),
639 object_index_pointer,
640 dematerialized_index_pointer);
641 }
642 return;
643 }
644
625 if (op->IsStackSlot()) { 645 if (op->IsStackSlot()) {
626 if (is_tagged) { 646 if (is_tagged) {
627 translation->StoreStackSlot(op->index()); 647 translation->StoreStackSlot(op->index());
628 } else if (is_uint32) { 648 } else if (is_uint32) {
629 translation->StoreUint32StackSlot(op->index()); 649 translation->StoreUint32StackSlot(op->index());
630 } else { 650 } else {
631 translation->StoreInt32StackSlot(op->index()); 651 translation->StoreInt32StackSlot(op->index());
632 } 652 }
633 } else if (op->IsDoubleStackSlot()) { 653 } else if (op->IsDoubleStackSlot()) {
634 translation->StoreDoubleStackSlot(op->index()); 654 translation->StoreDoubleStackSlot(op->index());
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5845 __ Subu(scratch, result, scratch); 5865 __ Subu(scratch, result, scratch);
5846 __ lw(result, FieldMemOperand(scratch, 5866 __ lw(result, FieldMemOperand(scratch,
5847 FixedArray::kHeaderSize - kPointerSize)); 5867 FixedArray::kHeaderSize - kPointerSize));
5848 __ bind(&done); 5868 __ bind(&done);
5849 } 5869 }
5850 5870
5851 5871
5852 #undef __ 5872 #undef __
5853 5873
5854 } } // namespace v8::internal 5874 } } // namespace v8::internal
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