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Issue 16240003: Improve smi support in crankshaft (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 6 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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1050 // Some branch instructions (e.g. loops' back edges) 1050 // Some branch instructions (e.g. loops' back edges)
1051 // can potentially cause a GC so they have a pointer map. 1051 // can potentially cause a GC so they have a pointer map.
1052 // By inserting a move we essentially create a copy of a 1052 // By inserting a move we essentially create a copy of a
1053 // value which is invisible to PopulatePointerMaps(), because we store 1053 // value which is invisible to PopulatePointerMaps(), because we store
1054 // it into a location different from the operand of a live range 1054 // it into a location different from the operand of a live range
1055 // covering a branch instruction. 1055 // covering a branch instruction.
1056 // Thus we need to manually record a pointer. 1056 // Thus we need to manually record a pointer.
1057 LInstruction* branch = 1057 LInstruction* branch =
1058 InstructionAt(cur_block->last_instruction_index()); 1058 InstructionAt(cur_block->last_instruction_index());
1059 if (branch->HasPointerMap()) { 1059 if (branch->HasPointerMap()) {
1060 if (phi->representation().IsSmiOrTagged()) { 1060 if (phi->representation().IsTagged() && !phi->type().IsSmi()) {
1061 branch->pointer_map()->RecordPointer(phi_operand, zone()); 1061 branch->pointer_map()->RecordPointer(phi_operand, zone());
1062 } else if (!phi->representation().IsDouble()) { 1062 } else if (!phi->representation().IsDouble()) {
1063 branch->pointer_map()->RecordUntagged(phi_operand, zone()); 1063 branch->pointer_map()->RecordUntagged(phi_operand, zone());
1064 } 1064 }
1065 } 1065 }
1066 } 1066 }
1067 1067
1068 LiveRange* live_range = LiveRangeFor(phi->id()); 1068 LiveRange* live_range = LiveRangeFor(phi->id());
1069 LLabel* label = chunk_->GetLabel(phi->block()->block_id()); 1069 LLabel* label = chunk_->GetLabel(phi->block()->block_id());
1070 label->GetOrCreateParallelMove(LGap::START, zone())-> 1070 label->GetOrCreateParallelMove(LGap::START, zone())->
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1633 va_start(arguments, msg); 1633 va_start(arguments, msg);
1634 OS::VPrint(msg, arguments); 1634 OS::VPrint(msg, arguments);
1635 va_end(arguments); 1635 va_end(arguments);
1636 } 1636 }
1637 } 1637 }
1638 1638
1639 1639
1640 bool LAllocator::HasTaggedValue(int virtual_register) const { 1640 bool LAllocator::HasTaggedValue(int virtual_register) const {
1641 HValue* value = graph_->LookupValue(virtual_register); 1641 HValue* value = graph_->LookupValue(virtual_register);
1642 if (value == NULL) return false; 1642 if (value == NULL) return false;
1643 return value->representation().IsSmiOrTagged(); 1643 return value->representation().IsTagged() && !value->type().IsSmi();
1644 } 1644 }
1645 1645
1646 1646
1647 RegisterKind LAllocator::RequiredRegisterKind(int virtual_register) const { 1647 RegisterKind LAllocator::RequiredRegisterKind(int virtual_register) const {
1648 if (virtual_register < first_artificial_register_) { 1648 if (virtual_register < first_artificial_register_) {
1649 HValue* value = graph_->LookupValue(virtual_register); 1649 HValue* value = graph_->LookupValue(virtual_register);
1650 if (value != NULL && value->representation().IsDouble()) { 1650 if (value != NULL && value->representation().IsDouble()) {
1651 return DOUBLE_REGISTERS; 1651 return DOUBLE_REGISTERS;
1652 } 1652 }
1653 } else if (double_artificial_registers_.Contains( 1653 } else if (double_artificial_registers_.Contains(
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2185 LiveRange* current = live_ranges()->at(i); 2185 LiveRange* current = live_ranges()->at(i);
2186 if (current != NULL) current->Verify(); 2186 if (current != NULL) current->Verify();
2187 } 2187 }
2188 } 2188 }
2189 2189
2190 2190
2191 #endif 2191 #endif
2192 2192
2193 2193
2194 } } // namespace v8::internal 2194 } } // namespace v8::internal
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