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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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_REWRITER_H_ | 28 #ifndef V8_REWRITER_H_ |
29 #define V8_REWRITER_H_ | 29 #define V8_REWRITER_H_ |
30 | 30 |
31 namespace v8 { namespace internal { | 31 namespace v8 { |
| 32 namespace internal { |
32 | 33 |
33 | 34 |
34 // Currently, the rewriter takes function literals (only top-level) | 35 // Currently, the rewriter takes function literals (only top-level) |
35 // and rewrites them to return the value of the last expression in | 36 // and rewrites them to return the value of the last expression in |
36 // them. | 37 // them. |
37 // | 38 // |
38 // The rewriter adds a (hidden) variable, called .result, to the | 39 // The rewriter adds a (hidden) variable, called .result, to the |
39 // activation, and tries to figure out where it needs to store into | 40 // activation, and tries to figure out where it needs to store into |
40 // this variable. If the variable is ever used, we conclude by adding | 41 // this variable. If the variable is ever used, we conclude by adding |
41 // a return statement that returns the variable to the body of the | 42 // a return statement that returns the variable to the body of the |
42 // given function. | 43 // given function. |
43 | 44 |
44 class Rewriter { | 45 class Rewriter { |
45 public: | 46 public: |
46 static bool Process(FunctionLiteral* function); | 47 static bool Process(FunctionLiteral* function); |
47 static bool Optimize(FunctionLiteral* function); | 48 static bool Optimize(FunctionLiteral* function); |
48 }; | 49 }; |
49 | 50 |
50 | 51 |
51 } } // namespace v8::internal | 52 } } // namespace v8::internal |
52 | 53 |
53 #endif // V8_REWRITER_H_ | 54 #endif // V8_REWRITER_H_ |
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