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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 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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317 | 317 |
318 void VirtualFrame::SetElementAt(int index, Result* value) { | 318 void VirtualFrame::SetElementAt(int index, Result* value) { |
319 int frame_index = elements_.length() - index - 1; | 319 int frame_index = elements_.length() - index - 1; |
320 ASSERT(frame_index >= 0); | 320 ASSERT(frame_index >= 0); |
321 ASSERT(frame_index < elements_.length()); | 321 ASSERT(frame_index < elements_.length()); |
322 ASSERT(value->is_valid()); | 322 ASSERT(value->is_valid()); |
323 FrameElement original = elements_[frame_index]; | 323 FrameElement original = elements_[frame_index]; |
324 | 324 |
325 // Early exit if the element is the same as the one being set. | 325 // Early exit if the element is the same as the one being set. |
326 bool same_register = original.is_register() | 326 bool same_register = original.is_register() |
327 && value->is_register() | 327 && value->is_register() |
328 && original.reg().is(value->reg()); | 328 && original.reg().is(value->reg()); |
329 bool same_constant = original.is_constant() | 329 bool same_constant = original.is_constant() |
330 && value->is_constant() | 330 && value->is_constant() |
331 && original.handle().is_identical_to(value->handle()); | 331 && original.handle().is_identical_to(value->handle()); |
332 if (same_register || same_constant) { | 332 if (same_register || same_constant) { |
333 value->Unuse(); | 333 value->Unuse(); |
334 return; | 334 return; |
335 } | 335 } |
336 | 336 |
337 InvalidateFrameSlotAt(frame_index); | 337 InvalidateFrameSlotAt(frame_index); |
338 | 338 |
339 FrameElement new_element; | 339 FrameElement new_element; |
340 if (value->is_register()) { | 340 if (value->is_register()) { |
341 if (is_used(value->reg())) { | 341 if (is_used(value->reg())) { |
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470 // Specialization of List::ResizeAdd to non-inlined version for FrameElements. | 470 // Specialization of List::ResizeAdd to non-inlined version for FrameElements. |
471 // The function ResizeAdd becomes a real function, whose implementation is the | 471 // The function ResizeAdd becomes a real function, whose implementation is the |
472 // inlined ResizeAddInternal. | 472 // inlined ResizeAddInternal. |
473 template <> | 473 template <> |
474 void List<FrameElement, | 474 void List<FrameElement, |
475 FreeStoreAllocationPolicy>::ResizeAdd(const FrameElement& element) { | 475 FreeStoreAllocationPolicy>::ResizeAdd(const FrameElement& element) { |
476 ResizeAddInternal(element); | 476 ResizeAddInternal(element); |
477 } | 477 } |
478 | 478 |
479 } } // namespace v8::internal | 479 } } // namespace v8::internal |
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