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Side by Side Diff: src/arm/virtual-frame-arm.h

Issue 661171: Merge r3962 to trunk (Closed) Base URL: http://v8.googlecode.com/svn/trunk/
Patch Set: Created 10 years, 10 months ago
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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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55 SpilledScope() {} 55 SpilledScope() {}
56 }; 56 };
57 57
58 // An illegal index into the virtual frame. 58 // An illegal index into the virtual frame.
59 static const int kIllegalIndex = -1; 59 static const int kIllegalIndex = -1;
60 60
61 // Construct an initial virtual frame on entry to a JS function. 61 // Construct an initial virtual frame on entry to a JS function.
62 VirtualFrame(); 62 VirtualFrame();
63 63
64 // Construct a virtual frame as a clone of an existing one. 64 // Construct a virtual frame as a clone of an existing one.
65 explicit VirtualFrame(VirtualFrame* original); 65 explicit inline VirtualFrame(VirtualFrame* original);
66 66
67 CodeGenerator* cgen() { return CodeGeneratorScope::Current(); } 67 CodeGenerator* cgen() { return CodeGeneratorScope::Current(); }
68 MacroAssembler* masm() { return cgen()->masm(); } 68 MacroAssembler* masm() { return cgen()->masm(); }
69 69
70 // Create a duplicate of an existing valid frame element. 70 // Create a duplicate of an existing valid frame element.
71 FrameElement CopyElementAt(int index, 71 FrameElement CopyElementAt(int index,
72 NumberInfo::Type info = NumberInfo::kUnknown); 72 NumberInfo::Type info = NumberInfo::kUnknown);
73 73
74 // The number of elements on the virtual frame. 74 // The number of elements on the virtual frame.
75 int element_count() { return elements_.length(); } 75 int element_count() { return elements_.length(); }
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337 // Push an element on top of the expression stack and emit a 337 // Push an element on top of the expression stack and emit a
338 // corresponding push instruction. 338 // corresponding push instruction.
339 void EmitPush(Register reg); 339 void EmitPush(Register reg);
340 340
341 // Push multiple registers on the stack and the virtual frame 341 // Push multiple registers on the stack and the virtual frame
342 // Register are selected by setting bit in src_regs and 342 // Register are selected by setting bit in src_regs and
343 // are pushed in decreasing order: r15 .. r0. 343 // are pushed in decreasing order: r15 .. r0.
344 void EmitPushMultiple(int count, int src_regs); 344 void EmitPushMultiple(int count, int src_regs);
345 345
346 // Push an element on the virtual frame. 346 // Push an element on the virtual frame.
347 void Push(Register reg, NumberInfo::Type info = NumberInfo::kUnknown); 347 inline void Push(Register reg, NumberInfo::Type info = NumberInfo::kUnknown);
348 void Push(Handle<Object> value); 348 inline void Push(Handle<Object> value);
349 void Push(Smi* value) { Push(Handle<Object>(value)); } 349 inline void Push(Smi* value);
350 350
351 // Pushing a result invalidates it (its contents become owned by the frame). 351 // Pushing a result invalidates it (its contents become owned by the frame).
352 void Push(Result* result) { 352 void Push(Result* result) {
353 if (result->is_register()) { 353 if (result->is_register()) {
354 Push(result->reg()); 354 Push(result->reg());
355 } else { 355 } else {
356 ASSERT(result->is_constant()); 356 ASSERT(result->is_constant());
357 Push(result->handle()); 357 Push(result->handle());
358 } 358 }
359 result->Unuse(); 359 result->Unuse();
360 } 360 }
361 361
362 // Nip removes zero or more elements from immediately below the top 362 // Nip removes zero or more elements from immediately below the top
363 // of the frame, leaving the previous top-of-frame value on top of 363 // of the frame, leaving the previous top-of-frame value on top of
364 // the frame. Nip(k) is equivalent to x = Pop(), Drop(k), Push(x). 364 // the frame. Nip(k) is equivalent to x = Pop(), Drop(k), Push(x).
365 void Nip(int num_dropped); 365 inline void Nip(int num_dropped);
366 366
367 private: 367 private:
368 static const int kLocal0Offset = JavaScriptFrameConstants::kLocal0Offset; 368 static const int kLocal0Offset = JavaScriptFrameConstants::kLocal0Offset;
369 static const int kFunctionOffset = JavaScriptFrameConstants::kFunctionOffset; 369 static const int kFunctionOffset = JavaScriptFrameConstants::kFunctionOffset;
370 static const int kContextOffset = StandardFrameConstants::kContextOffset; 370 static const int kContextOffset = StandardFrameConstants::kContextOffset;
371 371
372 static const int kHandlerSize = StackHandlerConstants::kSize / kPointerSize; 372 static const int kHandlerSize = StackHandlerConstants::kSize / kPointerSize;
373 static const int kPreallocatedElements = 5 + 8; // 8 expression stack slots. 373 static const int kPreallocatedElements = 5 + 8; // 8 expression stack slots.
374 374
375 ZoneList<FrameElement> elements_; 375 ZoneList<FrameElement> elements_;
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450 void SyncRange(int begin, int end); 450 void SyncRange(int begin, int end);
451 451
452 // Sync a single unsynced element that lies beneath or at the stack pointer. 452 // Sync a single unsynced element that lies beneath or at the stack pointer.
453 void SyncElementBelowStackPointer(int index); 453 void SyncElementBelowStackPointer(int index);
454 454
455 // Sync a single unsynced element that lies just above the stack pointer. 455 // Sync a single unsynced element that lies just above the stack pointer.
456 void SyncElementByPushing(int index); 456 void SyncElementByPushing(int index);
457 457
458 // Push a copy of a frame slot (typically a local or parameter) on top of 458 // Push a copy of a frame slot (typically a local or parameter) on top of
459 // the frame. 459 // the frame.
460 void PushFrameSlotAt(int index); 460 inline void PushFrameSlotAt(int index);
461 461
462 // Push a the value of a frame slot (typically a local or parameter) on 462 // Push a the value of a frame slot (typically a local or parameter) on
463 // top of the frame and invalidate the slot. 463 // top of the frame and invalidate the slot.
464 void TakeFrameSlotAt(int index); 464 void TakeFrameSlotAt(int index);
465 465
466 // Store the value on top of the frame to a frame slot (typically a local 466 // Store the value on top of the frame to a frame slot (typically a local
467 // or parameter). 467 // or parameter).
468 void StoreToFrameSlotAt(int index); 468 void StoreToFrameSlotAt(int index);
469 469
470 // Spill all elements in registers. Spill the top spilled_args elements 470 // Spill all elements in registers. Spill the top spilled_args elements
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493 // should be equal. 493 // should be equal.
494 void MergeMoveMemoryToRegisters(VirtualFrame* expected); 494 void MergeMoveMemoryToRegisters(VirtualFrame* expected);
495 495
496 // Invalidates a frame slot (puts an invalid frame element in it). 496 // Invalidates a frame slot (puts an invalid frame element in it).
497 // Copies on the frame are correctly handled, and if this slot was 497 // Copies on the frame are correctly handled, and if this slot was
498 // the backing store of copies, the index of the new backing store 498 // the backing store of copies, the index of the new backing store
499 // is returned. Otherwise, returns kIllegalIndex. 499 // is returned. Otherwise, returns kIllegalIndex.
500 // Register counts are correctly updated. 500 // Register counts are correctly updated.
501 int InvalidateFrameSlotAt(int index); 501 int InvalidateFrameSlotAt(int index);
502 502
503 bool Equals(VirtualFrame* other); 503 inline bool Equals(VirtualFrame* other);
504 504
505 // Classes that need raw access to the elements_ array. 505 // Classes that need raw access to the elements_ array.
506 friend class DeferredCode; 506 friend class DeferredCode;
507 friend class JumpTarget; 507 friend class JumpTarget;
508 }; 508 };
509 509
510 510
511 } } // namespace v8::internal 511 } } // namespace v8::internal
512 512
513 #endif // V8_ARM_VIRTUAL_FRAME_ARM_H_ 513 #endif // V8_ARM_VIRTUAL_FRAME_ARM_H_
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