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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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3149 // top forward. 3149 // top forward.
3150 // ebx: initial map 3150 // ebx: initial map
3151 ASSERT(function->has_initial_map()); 3151 ASSERT(function->has_initial_map());
3152 int instance_size = function->initial_map()->instance_size(); 3152 int instance_size = function->initial_map()->instance_size();
3153 #ifdef DEBUG 3153 #ifdef DEBUG
3154 __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset)); 3154 __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset));
3155 __ shl(ecx, kPointerSizeLog2); 3155 __ shl(ecx, kPointerSizeLog2);
3156 __ cmp(ecx, Immediate(instance_size)); 3156 __ cmp(ecx, Immediate(instance_size));
3157 __ Check(equal, "Instance size of initial map changed."); 3157 __ Check(equal, "Instance size of initial map changed.");
3158 #endif 3158 #endif
3159 __ AllocateInNewSpace(instance_size, edx, ecx, no_reg, 3159 __ Allocate(instance_size, edx, ecx, no_reg, &generic_stub_call,
3160 &generic_stub_call, NO_ALLOCATION_FLAGS); 3160 NO_ALLOCATION_FLAGS);
3161 3161
3162 // Allocated the JSObject, now initialize the fields and add the heap tag. 3162 // Allocated the JSObject, now initialize the fields and add the heap tag.
3163 // ebx: initial map 3163 // ebx: initial map
3164 // edx: JSObject (untagged) 3164 // edx: JSObject (untagged)
3165 __ mov(Operand(edx, JSObject::kMapOffset), ebx); 3165 __ mov(Operand(edx, JSObject::kMapOffset), ebx);
3166 __ mov(ebx, factory()->empty_fixed_array()); 3166 __ mov(ebx, factory()->empty_fixed_array());
3167 __ mov(Operand(edx, JSObject::kPropertiesOffset), ebx); 3167 __ mov(Operand(edx, JSObject::kPropertiesOffset), ebx);
3168 __ mov(Operand(edx, JSObject::kElementsOffset), ebx); 3168 __ mov(Operand(edx, JSObject::kElementsOffset), ebx);
3169 3169
3170 // Push the allocated object to the stack. This is the object that will be 3170 // Push the allocated object to the stack. This is the object that will be
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3624 // compare. 3624 // compare.
3625 __ j(not_equal, &miss_force_generic); 3625 __ j(not_equal, &miss_force_generic);
3626 3626
3627 // Check for the empty array, and preallocate a small backing store if 3627 // Check for the empty array, and preallocate a small backing store if
3628 // possible. 3628 // possible.
3629 __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset)); 3629 __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
3630 __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array())); 3630 __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array()));
3631 __ j(not_equal, &check_capacity); 3631 __ j(not_equal, &check_capacity);
3632 3632
3633 int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); 3633 int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements);
3634 __ AllocateInNewSpace(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT); 3634 __ Allocate(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT);
3635 // Restore the key, which is known to be the array length. 3635 // Restore the key, which is known to be the array length.
3636 3636
3637 // eax: value 3637 // eax: value
3638 // ecx: key 3638 // ecx: key
3639 // edx: receiver 3639 // edx: receiver
3640 // edi: elements 3640 // edi: elements
3641 // Make sure that the backing store can hold additional elements. 3641 // Make sure that the backing store can hold additional elements.
3642 __ mov(FieldOperand(edi, JSObject::kMapOffset), 3642 __ mov(FieldOperand(edi, JSObject::kMapOffset),
3643 Immediate(masm->isolate()->factory()->fixed_array_map())); 3643 Immediate(masm->isolate()->factory()->fixed_array_map()));
3644 __ mov(FieldOperand(edi, FixedArray::kLengthOffset), 3644 __ mov(FieldOperand(edi, FixedArray::kLengthOffset),
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3760 __ j(not_equal, &transition_elements_kind); 3760 __ j(not_equal, &transition_elements_kind);
3761 __ bind(&value_is_smi); 3761 __ bind(&value_is_smi);
3762 3762
3763 // Check for the empty array, and preallocate a small backing store if 3763 // Check for the empty array, and preallocate a small backing store if
3764 // possible. 3764 // possible.
3765 __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset)); 3765 __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
3766 __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array())); 3766 __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array()));
3767 __ j(not_equal, &check_capacity); 3767 __ j(not_equal, &check_capacity);
3768 3768
3769 int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements); 3769 int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements);
3770 __ AllocateInNewSpace(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT); 3770 __ Allocate(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT);
3771 3771
3772 // Restore the key, which is known to be the array length. 3772 // Restore the key, which is known to be the array length.
3773 __ mov(ecx, Immediate(0)); 3773 __ mov(ecx, Immediate(0));
3774 3774
3775 // eax: value 3775 // eax: value
3776 // ecx: key 3776 // ecx: key
3777 // edx: receiver 3777 // edx: receiver
3778 // edi: elements 3778 // edi: elements
3779 // Initialize the new FixedDoubleArray. 3779 // Initialize the new FixedDoubleArray.
3780 __ mov(FieldOperand(edi, JSObject::kMapOffset), 3780 __ mov(FieldOperand(edi, JSObject::kMapOffset),
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3826 __ jmp(ic_slow, RelocInfo::CODE_TARGET); 3826 __ jmp(ic_slow, RelocInfo::CODE_TARGET);
3827 } 3827 }
3828 } 3828 }
3829 3829
3830 3830
3831 #undef __ 3831 #undef __
3832 3832
3833 } } // namespace v8::internal 3833 } } // namespace v8::internal
3834 3834
3835 #endif // V8_TARGET_ARCH_IA32 3835 #endif // V8_TARGET_ARCH_IA32
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