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Issue 12314155: Allow direct allocation in old pointer space. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 9 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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3125 // top forward. 3125 // top forward.
3126 // ebx: initial map 3126 // ebx: initial map
3127 ASSERT(function->has_initial_map()); 3127 ASSERT(function->has_initial_map());
3128 int instance_size = function->initial_map()->instance_size(); 3128 int instance_size = function->initial_map()->instance_size();
3129 #ifdef DEBUG 3129 #ifdef DEBUG
3130 __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset)); 3130 __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset));
3131 __ shl(ecx, kPointerSizeLog2); 3131 __ shl(ecx, kPointerSizeLog2);
3132 __ cmp(ecx, Immediate(instance_size)); 3132 __ cmp(ecx, Immediate(instance_size));
3133 __ Check(equal, "Instance size of initial map changed."); 3133 __ Check(equal, "Instance size of initial map changed.");
3134 #endif 3134 #endif
3135 __ AllocateInNewSpace(instance_size, edx, ecx, no_reg, 3135 __ Allocate(instance_size, edx, ecx, no_reg, &generic_stub_call,
3136 &generic_stub_call, NO_ALLOCATION_FLAGS); 3136 NO_ALLOCATION_FLAGS, MacroAssembler::NEW_SPACE);
3137 3137
3138 // Allocated the JSObject, now initialize the fields and add the heap tag. 3138 // Allocated the JSObject, now initialize the fields and add the heap tag.
3139 // ebx: initial map 3139 // ebx: initial map
3140 // edx: JSObject (untagged) 3140 // edx: JSObject (untagged)
3141 __ mov(Operand(edx, JSObject::kMapOffset), ebx); 3141 __ mov(Operand(edx, JSObject::kMapOffset), ebx);
3142 __ mov(ebx, factory()->empty_fixed_array()); 3142 __ mov(ebx, factory()->empty_fixed_array());
3143 __ mov(Operand(edx, JSObject::kPropertiesOffset), ebx); 3143 __ mov(Operand(edx, JSObject::kPropertiesOffset), ebx);
3144 __ mov(Operand(edx, JSObject::kElementsOffset), ebx); 3144 __ mov(Operand(edx, JSObject::kElementsOffset), ebx);
3145 3145
3146 // Push the allocated object to the stack. This is the object that will be 3146 // Push the allocated object to the stack. This is the object that will be
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3600 // compare. 3600 // compare.
3601 __ j(not_equal, &miss_force_generic); 3601 __ j(not_equal, &miss_force_generic);
3602 3602
3603 // Check for the empty array, and preallocate a small backing store if 3603 // Check for the empty array, and preallocate a small backing store if
3604 // possible. 3604 // possible.
3605 __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset)); 3605 __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
3606 __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array())); 3606 __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array()));
3607 __ j(not_equal, &check_capacity); 3607 __ j(not_equal, &check_capacity);
3608 3608
3609 int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); 3609 int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements);
3610 __ AllocateInNewSpace(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT); 3610 __ Allocate(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT,
3611 MacroAssembler::NEW_SPACE);
3611 // Restore the key, which is known to be the array length. 3612 // Restore the key, which is known to be the array length.
3612 3613
3613 // eax: value 3614 // eax: value
3614 // ecx: key 3615 // ecx: key
3615 // edx: receiver 3616 // edx: receiver
3616 // edi: elements 3617 // edi: elements
3617 // Make sure that the backing store can hold additional elements. 3618 // Make sure that the backing store can hold additional elements.
3618 __ mov(FieldOperand(edi, JSObject::kMapOffset), 3619 __ mov(FieldOperand(edi, JSObject::kMapOffset),
3619 Immediate(masm->isolate()->factory()->fixed_array_map())); 3620 Immediate(masm->isolate()->factory()->fixed_array_map()));
3620 __ mov(FieldOperand(edi, FixedArray::kLengthOffset), 3621 __ mov(FieldOperand(edi, FixedArray::kLengthOffset),
(...skipping 115 matching lines...) Expand 10 before | Expand all | Expand 10 after
3736 __ j(not_equal, &transition_elements_kind); 3737 __ j(not_equal, &transition_elements_kind);
3737 __ bind(&value_is_smi); 3738 __ bind(&value_is_smi);
3738 3739
3739 // Check for the empty array, and preallocate a small backing store if 3740 // Check for the empty array, and preallocate a small backing store if
3740 // possible. 3741 // possible.
3741 __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset)); 3742 __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
3742 __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array())); 3743 __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array()));
3743 __ j(not_equal, &check_capacity); 3744 __ j(not_equal, &check_capacity);
3744 3745
3745 int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements); 3746 int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements);
3746 __ AllocateInNewSpace(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT); 3747 __ Allocate(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT,
3748 MacroAssembler::NEW_SPACE);
3747 3749
3748 // Restore the key, which is known to be the array length. 3750 // Restore the key, which is known to be the array length.
3749 __ mov(ecx, Immediate(0)); 3751 __ mov(ecx, Immediate(0));
3750 3752
3751 // eax: value 3753 // eax: value
3752 // ecx: key 3754 // ecx: key
3753 // edx: receiver 3755 // edx: receiver
3754 // edi: elements 3756 // edi: elements
3755 // Initialize the new FixedDoubleArray. 3757 // Initialize the new FixedDoubleArray.
3756 __ mov(FieldOperand(edi, JSObject::kMapOffset), 3758 __ mov(FieldOperand(edi, JSObject::kMapOffset),
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3802 __ jmp(ic_slow, RelocInfo::CODE_TARGET); 3804 __ jmp(ic_slow, RelocInfo::CODE_TARGET);
3803 } 3805 }
3804 } 3806 }
3805 3807
3806 3808
3807 #undef __ 3809 #undef __
3808 3810
3809 } } // namespace v8::internal 3811 } } // namespace v8::internal
3810 3812
3811 #endif // V8_TARGET_ARCH_IA32 3813 #endif // V8_TARGET_ARCH_IA32
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