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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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151 __ stop("stop-at"); 151 __ stop("stop-at");
152 } 152 }
153 #endif 153 #endif
154 154
155 // Strict mode functions and builtins need to replace the receiver 155 // Strict mode functions and builtins need to replace the receiver
156 // with undefined when called as functions (without an explicit 156 // with undefined when called as functions (without an explicit
157 // receiver object). t1 is zero for method calls and non-zero for 157 // receiver object). t1 is zero for method calls and non-zero for
158 // function calls. 158 // function calls.
159 if (!info->is_classic_mode() || info->is_native()) { 159 if (!info->is_classic_mode() || info->is_native()) {
160 Label ok; 160 Label ok;
161 Label begin;
162 __ bind(&begin);
161 __ Branch(&ok, eq, t1, Operand(zero_reg)); 163 __ Branch(&ok, eq, t1, Operand(zero_reg));
162 int receiver_offset = info->scope()->num_parameters() * kPointerSize; 164 int receiver_offset = info->scope()->num_parameters() * kPointerSize;
163 __ LoadRoot(a2, Heap::kUndefinedValueRootIndex); 165 __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
164 __ sw(a2, MemOperand(sp, receiver_offset)); 166 __ sw(a2, MemOperand(sp, receiver_offset));
165 __ bind(&ok); 167 __ bind(&ok);
168 ASSERT_EQ(kSizeOfFullCodegenStrictModePrologue, ok.pos() - begin.pos());
166 } 169 }
167 170
168 // Open a frame scope to indicate that there is a frame on the stack. The 171 // Open a frame scope to indicate that there is a frame on the stack. The
169 // MANUAL indicates that the scope shouldn't actually generate code to set up 172 // MANUAL indicates that the scope shouldn't actually generate code to set up
170 // the frame (that is done below). 173 // the frame (that is done below).
171 FrameScope frame_scope(masm_, StackFrame::MANUAL); 174 FrameScope frame_scope(masm_, StackFrame::MANUAL);
172 175
173 int locals_count = info->scope()->num_stack_slots(); 176 int locals_count = info->scope()->num_stack_slots();
174 177
178 // The following three instructions must remain together and unmodified for
179 // code aging to work properly.
175 __ Push(ra, fp, cp, a1); 180 __ Push(ra, fp, cp, a1);
176 if (locals_count > 0) { 181 // Load undefined value here, so the value is ready for the loop
177 // Load undefined value here, so the value is ready for the loop 182 // below.
178 // below. 183 __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
179 __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
180 }
181 // Adjust fp to point to caller's fp. 184 // Adjust fp to point to caller's fp.
182 __ Addu(fp, sp, Operand(2 * kPointerSize)); 185 __ Addu(fp, sp, Operand(2 * kPointerSize));
183 186
184 { Comment cmnt(masm_, "[ Allocate locals"); 187 { Comment cmnt(masm_, "[ Allocate locals");
185 for (int i = 0; i < locals_count; i++) { 188 for (int i = 0; i < locals_count; i++) {
186 __ push(at); 189 __ push(at);
187 } 190 }
188 } 191 }
189 192
190 bool function_in_register = true; 193 bool function_in_register = true;
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4568 *context_length = 0; 4571 *context_length = 0;
4569 return previous_; 4572 return previous_;
4570 } 4573 }
4571 4574
4572 4575
4573 #undef __ 4576 #undef __
4574 4577
4575 } } // namespace v8::internal 4578 } } // namespace v8::internal
4576 4579
4577 #endif // V8_TARGET_ARCH_MIPS 4580 #endif // V8_TARGET_ARCH_MIPS
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