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| 1 // Copyright 2008 the V8 project authors. All rights reserved. | 1 // Copyright 2008 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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| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | 27 |
| 28 #ifndef V8_VIRTUAL_FRAME_ARM_H_ | 28 #ifndef V8_VIRTUAL_FRAME_ARM_H_ |
| 29 #define V8_VIRTUAL_FRAME_ARM_H_ | 29 #define V8_VIRTUAL_FRAME_ARM_H_ |
| 30 | 30 |
| 31 #include "macro-assembler.h" | 31 #include "macro-assembler.h" |
| 32 #include "register-allocator.h" |
| 32 | 33 |
| 33 namespace v8 { namespace internal { | 34 namespace v8 { namespace internal { |
| 34 | 35 |
| 35 // ------------------------------------------------------------------------- | 36 // ------------------------------------------------------------------------- |
| 36 // Virtual frame elements | 37 // Virtual frame elements |
| 37 // | 38 // |
| 38 // The internal elements of the virtual frames. Elements are (currently) of | 39 // The internal elements of the virtual frames. Elements are (currently) of |
| 39 // only one kind, in-memory. Their actual location is given by their | 40 // only one kind, in-memory. Their actual location is given by their |
| 40 // position in the virtual frame. | 41 // position in the virtual frame. |
| 41 | 42 |
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| 70 return elements_.length() - expression_base_index(); | 71 return elements_.length() - expression_base_index(); |
| 71 } | 72 } |
| 72 | 73 |
| 73 // Add extra in-memory elements to the top of the frame without generating | 74 // Add extra in-memory elements to the top of the frame without generating |
| 74 // code. | 75 // code. |
| 75 void Adjust(int count); | 76 void Adjust(int count); |
| 76 | 77 |
| 77 // Forget frame elements without generating code. | 78 // Forget frame elements without generating code. |
| 78 void Forget(int count); | 79 void Forget(int count); |
| 79 | 80 |
| 81 // Ensure that this frame is in a state where an arbitrary frame of the |
| 82 // right size could be merged to it. May emit code. |
| 83 void MakeMergable() { } |
| 84 |
| 80 // Make this virtual frame have a state identical to an expected virtual | 85 // Make this virtual frame have a state identical to an expected virtual |
| 81 // frame. As a side effect, code may be emitted to make this frame match | 86 // frame. As a side effect, code may be emitted to make this frame match |
| 82 // the expected one. | 87 // the expected one. |
| 83 void MergeTo(VirtualFrame* expected); | 88 void MergeTo(VirtualFrame* expected); |
| 84 | 89 |
| 85 // Emit code for the physical JS entry and exit frame sequences. After | 90 // Emit code for the physical JS entry and exit frame sequences. After |
| 86 // calling Enter, the virtual frame is ready for use; and after calling | 91 // calling Enter, the virtual frame is ready for use; and after calling |
| 87 // Exit it should not be used. Note that Enter does not allocate space in | 92 // Exit it should not be used. Note that Enter does not allocate space in |
| 88 // the physical frame for storing frame-allocated locals. | 93 // the physical frame for storing frame-allocated locals. |
| 89 void Enter(); | 94 void Enter(); |
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| 189 int local0_index() const { return param0_index() + parameter_count_ + 4; } | 194 int local0_index() const { return param0_index() + parameter_count_ + 4; } |
| 190 | 195 |
| 191 // The index of the base of the expression stack. | 196 // The index of the base of the expression stack. |
| 192 int expression_base_index() const { return local0_index() + local_count_; } | 197 int expression_base_index() const { return local0_index() + local_count_; } |
| 193 }; | 198 }; |
| 194 | 199 |
| 195 | 200 |
| 196 } } // namespace v8::internal | 201 } } // namespace v8::internal |
| 197 | 202 |
| 198 #endif // V8_VIRTUAL_FRAME_ARM_H_ | 203 #endif // V8_VIRTUAL_FRAME_ARM_H_ |
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