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Issue 11358252: MIPS: Add code again to allow reclaiming old unexecuted functions. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 8 years, 1 month 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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129 // cp: Callee's context. 129 // cp: Callee's context.
130 // fp: Caller's frame pointer. 130 // fp: Caller's frame pointer.
131 // lr: Caller's pc. 131 // lr: Caller's pc.
132 132
133 // Strict mode functions and builtins need to replace the receiver 133 // Strict mode functions and builtins need to replace the receiver
134 // with undefined when called as functions (without an explicit 134 // with undefined when called as functions (without an explicit
135 // receiver object). r5 is zero for method calls and non-zero for 135 // receiver object). r5 is zero for method calls and non-zero for
136 // function calls. 136 // function calls.
137 if (!info_->is_classic_mode() || info_->is_native()) { 137 if (!info_->is_classic_mode() || info_->is_native()) {
138 Label ok; 138 Label ok;
139 Label begin;
140 __ bind(&begin);
139 __ Branch(&ok, eq, t1, Operand(zero_reg)); 141 __ Branch(&ok, eq, t1, Operand(zero_reg));
140 142
141 int receiver_offset = scope()->num_parameters() * kPointerSize; 143 int receiver_offset = scope()->num_parameters() * kPointerSize;
142 __ LoadRoot(a2, Heap::kUndefinedValueRootIndex); 144 __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
143 __ sw(a2, MemOperand(sp, receiver_offset)); 145 __ sw(a2, MemOperand(sp, receiver_offset));
144 __ bind(&ok); 146 __ bind(&ok);
147 ASSERT_EQ(kSizeOfOptimizedStrictModePrologue, ok.pos() - begin.pos());
145 } 148 }
146 149
150 // The following three instructions must remain together and unmodified for
151 // code aging to work properly.
147 __ Push(ra, fp, cp, a1); 152 __ Push(ra, fp, cp, a1);
153 // Add unused load of ip to ensure prologue sequence is identical for
154 // full-codegen and lithium-codegen.
155 __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
148 __ Addu(fp, sp, Operand(2 * kPointerSize)); // Adj. FP to point to saved FP. 156 __ Addu(fp, sp, Operand(2 * kPointerSize)); // Adj. FP to point to saved FP.
149 157
150 // Reserve space for the stack slots needed by the code. 158 // Reserve space for the stack slots needed by the code.
151 int slots = GetStackSlotCount(); 159 int slots = GetStackSlotCount();
152 if (slots > 0) { 160 if (slots > 0) {
153 if (FLAG_debug_code) { 161 if (FLAG_debug_code) {
154 __ li(a0, Operand(slots)); 162 __ li(a0, Operand(slots));
155 __ li(a2, Operand(kSlotsZapValue)); 163 __ li(a2, Operand(kSlotsZapValue));
156 Label loop; 164 Label loop;
157 __ bind(&loop); 165 __ bind(&loop);
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5460 __ Subu(scratch, result, scratch); 5468 __ Subu(scratch, result, scratch);
5461 __ lw(result, FieldMemOperand(scratch, 5469 __ lw(result, FieldMemOperand(scratch,
5462 FixedArray::kHeaderSize - kPointerSize)); 5470 FixedArray::kHeaderSize - kPointerSize));
5463 __ bind(&done); 5471 __ bind(&done);
5464 } 5472 }
5465 5473
5466 5474
5467 #undef __ 5475 #undef __
5468 5476
5469 } } // namespace v8::internal 5477 } } // namespace v8::internal
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