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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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21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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_JUMP_TARGET_H_ | 28 #ifndef V8_JUMP_TARGET_H_ |
29 #define V8_JUMP_TARGET_H_ | 29 #define V8_JUMP_TARGET_H_ |
30 | 30 |
31 #include "virtual-frame.h" | 31 namespace v8 { namespace internal { |
32 | 32 |
33 namespace v8 { namespace internal { | 33 // Forward declarations. |
| 34 class FrameElement; |
| 35 class Result; |
| 36 class VirtualFrame; |
| 37 |
34 | 38 |
35 // ------------------------------------------------------------------------- | 39 // ------------------------------------------------------------------------- |
36 // Jump targets | 40 // Jump targets |
37 // | 41 // |
38 // A jump target is an abstraction of a basic-block entry in generated | 42 // A jump target is an abstraction of a basic-block entry in generated |
39 // code. It collects all the virtual frames reaching the block by | 43 // code. It collects all the virtual frames reaching the block by |
40 // forward jumps and pairs them with labels for the merge code along | 44 // forward jumps and pairs them with labels for the merge code along |
41 // all forward-reaching paths. When bound, an expected frame for the | 45 // all forward-reaching paths. When bound, an expected frame for the |
42 // block is determined and code is generated to merge to the expected | 46 // block is determined and code is generated to merge to the expected |
43 // frame. For backward jumps, the merge code is generated at the edge | 47 // frame. For backward jumps, the merge code is generated at the edge |
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303 bool is_shadowing_; | 307 bool is_shadowing_; |
304 #endif | 308 #endif |
305 | 309 |
306 DISALLOW_COPY_AND_ASSIGN(ShadowTarget); | 310 DISALLOW_COPY_AND_ASSIGN(ShadowTarget); |
307 }; | 311 }; |
308 | 312 |
309 | 313 |
310 } } // namespace v8::internal | 314 } } // namespace v8::internal |
311 | 315 |
312 #endif // V8_JUMP_TARGET_H_ | 316 #endif // V8_JUMP_TARGET_H_ |
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