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

Issue 164136: Change the SpilledScope scope and ...AndSpill functions on ARM so that... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 11 years, 4 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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45 45
46 class VirtualFrame : public ZoneObject { 46 class VirtualFrame : public ZoneObject {
47 public: 47 public:
48 // A utility class to introduce a scope where the virtual frame is 48 // A utility class to introduce a scope where the virtual frame is
49 // expected to remain spilled. The constructor spills the code 49 // expected to remain spilled. The constructor spills the code
50 // generator's current frame, but no attempt is made to require it 50 // generator's current frame, but no attempt is made to require it
51 // to stay spilled. It is intended as documentation while the code 51 // to stay spilled. It is intended as documentation while the code
52 // generator is being transformed. 52 // generator is being transformed.
53 class SpilledScope BASE_EMBEDDED { 53 class SpilledScope BASE_EMBEDDED {
54 public: 54 public:
55 SpilledScope() : previous_state_(cgen()->in_spilled_code()) { 55 SpilledScope() {}
56 ASSERT(cgen()->has_valid_frame());
57 cgen()->frame()->SpillAll();
58 cgen()->set_in_spilled_code(true);
59 }
60
61 ~SpilledScope() {
62 cgen()->set_in_spilled_code(previous_state_);
63 }
64
65 private:
66 bool previous_state_;
67
68 CodeGenerator* cgen() { return CodeGeneratorScope::Current(); }
69 }; 56 };
70 57
71 // An illegal index into the virtual frame. 58 // An illegal index into the virtual frame.
72 static const int kIllegalIndex = -1; 59 static const int kIllegalIndex = -1;
73 60
74 // Construct an initial virtual frame on entry to a JS function. 61 // Construct an initial virtual frame on entry to a JS function.
75 VirtualFrame(); 62 VirtualFrame();
76 63
77 // Construct a virtual frame as a clone of an existing one. 64 // Construct a virtual frame as a clone of an existing one.
78 explicit VirtualFrame(VirtualFrame* original); 65 explicit VirtualFrame(VirtualFrame* original);
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527 514
528 // Classes that need raw access to the elements_ array. 515 // Classes that need raw access to the elements_ array.
529 friend class DeferredCode; 516 friend class DeferredCode;
530 friend class JumpTarget; 517 friend class JumpTarget;
531 }; 518 };
532 519
533 520
534 } } // namespace v8::internal 521 } } // namespace v8::internal
535 522
536 #endif // V8_ARM_VIRTUAL_FRAME_ARM_H_ 523 #endif // V8_ARM_VIRTUAL_FRAME_ARM_H_
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