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Issue 9298011: MIPS: Store transitioned JSArray maps in global context (Closed)
Patch Set: Created 8 years, 10 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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109 // and filled with the hole values. 109 // and filled with the hole values.
110 static void AllocateEmptyJSArray(MacroAssembler* masm, 110 static void AllocateEmptyJSArray(MacroAssembler* masm,
111 Register array_function, 111 Register array_function,
112 Register result, 112 Register result,
113 Register scratch1, 113 Register scratch1,
114 Register scratch2, 114 Register scratch2,
115 Register scratch3, 115 Register scratch3,
116 Label* gc_required) { 116 Label* gc_required) {
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 // Load the initial map from the array function. 119 __ LoadGlobalInitialConstructedArrayMap(array_function, scratch2, scratch1);
120 __ lw(scratch1, FieldMemOperand(array_function,
121 JSFunction::kPrototypeOrInitialMapOffset));
122 120
123 // 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
124 // requested elements. 122 // requested elements.
125 int size = JSArray::kSize; 123 int size = JSArray::kSize;
126 if (initial_capacity > 0) { 124 if (initial_capacity > 0) {
127 size += FixedArray::SizeFor(initial_capacity); 125 size += FixedArray::SizeFor(initial_capacity);
128 } 126 }
129 __ AllocateInNewSpace(size, 127 __ AllocateInNewSpace(size,
130 result, 128 result,
131 scratch2, 129 scratch2,
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207 Register array_function, // Array function. 205 Register array_function, // Array function.
208 Register array_size, // As a smi, cannot be 0. 206 Register array_size, // As a smi, cannot be 0.
209 Register result, 207 Register result,
210 Register elements_array_storage, 208 Register elements_array_storage,
211 Register elements_array_end, 209 Register elements_array_end,
212 Register scratch1, 210 Register scratch1,
213 Register scratch2, 211 Register scratch2,
214 bool fill_with_hole, 212 bool fill_with_hole,
215 Label* gc_required) { 213 Label* gc_required) {
216 // Load the initial map from the array function. 214 // Load the initial map from the array function.
217 __ lw(elements_array_storage, 215 __ LoadGlobalInitialConstructedArrayMap(array_function, scratch2,
218 FieldMemOperand(array_function, 216 elements_array_storage);
219 JSFunction::kPrototypeOrInitialMapOffset));
220 217
221 if (FLAG_debug_code) { // Assert that array size is not zero. 218 if (FLAG_debug_code) { // Assert that array size is not zero.
222 __ Assert( 219 __ Assert(
223 ne, "array size is unexpectedly 0", array_size, Operand(zero_reg)); 220 ne, "array size is unexpectedly 0", array_size, Operand(zero_reg));
224 } 221 }
225 222
226 // Allocate the JSArray object together with space for a FixedArray with the 223 // Allocate the JSArray object together with space for a FixedArray with the
227 // requested number of elements. 224 // requested number of elements.
228 STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); 225 STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
229 __ li(elements_array_end, 226 __ li(elements_array_end,
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1812 __ bind(&dont_adapt_arguments); 1809 __ bind(&dont_adapt_arguments);
1813 __ Jump(a3); 1810 __ Jump(a3);
1814 } 1811 }
1815 1812
1816 1813
1817 #undef __ 1814 #undef __
1818 1815
1819 } } // namespace v8::internal 1816 } } // namespace v8::internal
1820 1817
1821 #endif // V8_TARGET_ARCH_MIPS 1818 #endif // V8_TARGET_ARCH_MIPS
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