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Issue 14246017: MIPS: Fix bugs in IfBuilder and improve functionality (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 8 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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816 block->UpdateEnvironment(last_environment); 816 block->UpdateEnvironment(last_environment);
817 ASSERT(pred->argument_count() >= 0); 817 ASSERT(pred->argument_count() >= 0);
818 argument_count_ = pred->argument_count(); 818 argument_count_ = pred->argument_count();
819 } else { 819 } else {
820 // We are at a state join => process phis. 820 // We are at a state join => process phis.
821 HBasicBlock* pred = block->predecessors()->at(0); 821 HBasicBlock* pred = block->predecessors()->at(0);
822 // No need to copy the environment, it cannot be used later. 822 // No need to copy the environment, it cannot be used later.
823 HEnvironment* last_environment = pred->last_environment(); 823 HEnvironment* last_environment = pred->last_environment();
824 for (int i = 0; i < block->phis()->length(); ++i) { 824 for (int i = 0; i < block->phis()->length(); ++i) {
825 HPhi* phi = block->phis()->at(i); 825 HPhi* phi = block->phis()->at(i);
826 last_environment->SetValueAt(phi->merged_index(), phi); 826 if (phi->merged_index() < last_environment->length()) {
827 last_environment->SetValueAt(phi->merged_index(), phi);
828 }
827 } 829 }
828 for (int i = 0; i < block->deleted_phis()->length(); ++i) { 830 for (int i = 0; i < block->deleted_phis()->length(); ++i) {
829 last_environment->SetValueAt(block->deleted_phis()->at(i), 831 if (block->deleted_phis()->at(i) < last_environment->length()) {
830 graph_->GetConstantUndefined()); 832 last_environment->SetValueAt(block->deleted_phis()->at(i),
833 graph_->GetConstantUndefined());
834 }
831 } 835 }
832 block->UpdateEnvironment(last_environment); 836 block->UpdateEnvironment(last_environment);
833 // Pick up the outgoing argument count of one of the predecessors. 837 // Pick up the outgoing argument count of one of the predecessors.
834 argument_count_ = pred->argument_count(); 838 argument_count_ = pred->argument_count();
835 } 839 }
836 HInstruction* current = block->first(); 840 HInstruction* current = block->first();
837 int start = chunk_->instructions()->length(); 841 int start = chunk_->instructions()->length();
838 while (current != NULL && !is_aborted()) { 842 while (current != NULL && !is_aborted()) {
839 // Code for constants in registers is generated lazily. 843 // Code for constants in registers is generated lazily.
840 if (!current->EmitAtUses()) { 844 if (!current->EmitAtUses()) {
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2469 2473
2470 2474
2471 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { 2475 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
2472 LOperand* object = UseRegister(instr->object()); 2476 LOperand* object = UseRegister(instr->object());
2473 LOperand* index = UseRegister(instr->index()); 2477 LOperand* index = UseRegister(instr->index());
2474 return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index)); 2478 return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index));
2475 } 2479 }
2476 2480
2477 2481
2478 } } // namespace v8::internal 2482 } } // namespace v8::internal
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