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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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117 const int initial_capacity = JSArray::kPreallocatedArrayElements; 117 const int initial_capacity = JSArray::kPreallocatedArrayElements;
118 STATIC_ASSERT(initial_capacity >= 0); 118 STATIC_ASSERT(initial_capacity >= 0);
119 __ LoadInitialArrayMap(array_function, scratch2, scratch1, false); 119 __ LoadInitialArrayMap(array_function, scratch2, scratch1, false);
120 120
121 // Allocate the JSArray object together with space for a fixed array with the 121 // Allocate the JSArray object together with space for a fixed array with the
122 // requested elements. 122 // requested elements.
123 int size = JSArray::kSize; 123 int size = JSArray::kSize;
124 if (initial_capacity > 0) { 124 if (initial_capacity > 0) {
125 size += FixedArray::SizeFor(initial_capacity); 125 size += FixedArray::SizeFor(initial_capacity);
126 } 126 }
127 __ AllocateInNewSpace(size, 127 __ Allocate(size, result, scratch2, scratch3, gc_required, TAG_OBJECT,
128 result, 128 MacroAssembler::NEW_SPACE);
129 scratch2,
130 scratch3,
131 gc_required,
132 TAG_OBJECT);
133 129
134 // Allocated the JSArray. Now initialize the fields except for the elements 130 // Allocated the JSArray. Now initialize the fields except for the elements
135 // array. 131 // array.
136 // result: JSObject 132 // result: JSObject
137 // scratch1: initial map 133 // scratch1: initial map
138 // scratch2: start of next object 134 // scratch2: start of next object
139 __ str(scratch1, FieldMemOperand(result, JSObject::kMapOffset)); 135 __ str(scratch1, FieldMemOperand(result, JSObject::kMapOffset));
140 __ LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex); 136 __ LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex);
141 __ str(scratch1, FieldMemOperand(result, JSArray::kPropertiesOffset)); 137 __ str(scratch1, FieldMemOperand(result, JSArray::kPropertiesOffset));
142 // Field JSArray::kElementsOffset is initialized later. 138 // Field JSArray::kElementsOffset is initialized later.
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612 __ IncrementCounter(counters->string_ctor_cached_number(), 1, r3, r4); 608 __ IncrementCounter(counters->string_ctor_cached_number(), 1, r3, r4);
613 __ bind(&argument_is_string); 609 __ bind(&argument_is_string);
614 610
615 // ----------- S t a t e ------------- 611 // ----------- S t a t e -------------
616 // -- r2 : argument converted to string 612 // -- r2 : argument converted to string
617 // -- r1 : constructor function 613 // -- r1 : constructor function
618 // -- lr : return address 614 // -- lr : return address
619 // ----------------------------------- 615 // -----------------------------------
620 616
621 Label gc_required; 617 Label gc_required;
622 __ AllocateInNewSpace(JSValue::kSize, 618 __ Allocate(JSValue::kSize,
623 r0, // Result. 619 r0, // Result.
624 r3, // Scratch. 620 r3, // Scratch.
625 r4, // Scratch. 621 r4, // Scratch.
626 &gc_required, 622 &gc_required,
627 TAG_OBJECT); 623 TAG_OBJECT,
624 MacroAssembler::NEW_SPACE);
628 625
629 // Initialising the String Object. 626 // Initialising the String Object.
630 Register map = r3; 627 Register map = r3;
631 __ LoadGlobalFunctionInitialMap(function, map, r4); 628 __ LoadGlobalFunctionInitialMap(function, map, r4);
632 if (FLAG_debug_code) { 629 if (FLAG_debug_code) {
633 __ ldrb(r4, FieldMemOperand(map, Map::kInstanceSizeOffset)); 630 __ ldrb(r4, FieldMemOperand(map, Map::kInstanceSizeOffset));
634 __ cmp(r4, Operand(JSValue::kSize >> kPointerSizeLog2)); 631 __ cmp(r4, Operand(JSValue::kSize >> kPointerSizeLog2));
635 __ Assert(eq, "Unexpected string wrapper instance size"); 632 __ Assert(eq, "Unexpected string wrapper instance size");
636 __ ldrb(r4, FieldMemOperand(map, Map::kUnusedPropertyFieldsOffset)); 633 __ ldrb(r4, FieldMemOperand(map, Map::kUnusedPropertyFieldsOffset));
637 __ cmp(r4, Operand::Zero()); 634 __ cmp(r4, Operand::Zero());
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1850 __ bind(&dont_adapt_arguments); 1847 __ bind(&dont_adapt_arguments);
1851 __ Jump(r3); 1848 __ Jump(r3);
1852 } 1849 }
1853 1850
1854 1851
1855 #undef __ 1852 #undef __
1856 1853
1857 } } // namespace v8::internal 1854 } } // namespace v8::internal
1858 1855
1859 #endif // V8_TARGET_ARCH_ARM 1856 #endif // V8_TARGET_ARCH_ARM
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