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| 2 | <html> |
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| 3 | <head> |
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| 4 | <title> |
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| 5 | Demo page information |
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| 6 | </title> |
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| 7 | </head> |
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| 8 | |
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| 9 | <body> |
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| 10 | |
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| 11 | <h1>Demo page information</h1> |
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| 12 | |
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| 13 | <p>Press "back" or <a href=".">click here</a> to return to the demo |
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| 14 | page.</p> |
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| 15 | |
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| 16 | <h2><a name="hints">Hints and Advice</a></h2> |
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| 17 | |
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| 18 | <ul> |
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| 19 | <li>The generated LLVM code will be easier to read if |
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| 20 | you use stdio (e.g., printf) than iostreams (e.g., std::cout).</li> |
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| 21 | |
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| 22 | <li>Unused inline functions and methods are not generated. Instead |
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| 23 | of '<tt>class foo { void bar() {}};</tt>', |
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| 24 | try writing '<tt>class foo { void bar(); }; void foo::bar() {}</tt>'.</li> |
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| 25 | |
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| 26 | <li>If you want to try out a file that uses non-standard header files, you should |
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| 27 | preprocess it (e.g., with the <tt>-save-temps</tt> or <tt>-E</tt> options to |
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| 28 | <tt>gcc</tt>) then upload the result.</li> |
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| 29 | |
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| 30 | </ul> |
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| 31 | |
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| 32 | |
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| 33 | <h2><a name="demangle">Demangle C++ names with C++ filt</a></h2> |
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| 34 | |
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| 35 | <p> |
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| 36 | Select this option if you want to run the output LLVM IR through "c++filt", |
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| 37 | which converts 'mangled' C++ names to their unmangled version. |
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| 38 | Note that LLVM code produced will not be lexically valid, but it will |
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| 39 | be easier to understand. |
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| 40 | </p> |
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| 41 | |
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| 42 | <h2><a name="lto">Run link-time optimizer</a></h2> |
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| 43 | |
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| 44 | <p> |
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| 45 | Select this option to run the LLVM link-time optimizer, which is designed to |
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| 46 | optimize across files in your application. Since the demo page doesn't allow |
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| 47 | you to upload multiple files at once, and does not link in any libraries, we |
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| 48 | configured the demo page optimizer to assume there are no calls |
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| 49 | coming in from outside the source file, allowing it to optimize more |
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| 50 | aggressively.</p> |
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| 51 | |
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| 52 | <p>Note that you have to define 'main' in your program for this |
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| 53 | to make much of a difference. |
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| 54 | </p> |
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| 55 | |
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| 56 | <h2><a name="stats">Show detailed pass statistics</a></h2> |
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| 57 | |
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| 58 | <p> |
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| 59 | Select this option to enable compilation timings and statistics from various |
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| 60 | optimizers.</p> |
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| 61 | |
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| 62 | |
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| 63 | <h2><a name="bcanalyzer">Analyze generated bytecode</a></h2> |
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| 64 | |
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| 65 | <p> |
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| 66 | Select this option to run the <a |
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| 67 | href="http://llvm.org/cmds/llvm-bcanalyzer.html">llvm-bcanalyzer</a> tool |
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| 68 | on the generated bytecode, which introspects into the format of the .bc file |
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| 69 | itself. </p> |
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| 70 | |
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| 71 | |
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| 72 | <h2><a name="llvm2cpp">Show C++ API code</a></h2> |
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| 73 | |
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| 74 | <p> |
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| 75 | Select this option to run the <a |
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| 76 | href="http://llvm.org/cmds/llvm2cpp.html">llvm2cpp</a> tool |
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| 77 | on the generated bytecode, which auto generates the C++ API calls that could |
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| 78 | be used to create the .bc file. |
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| 79 | </p> |
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| 80 | |
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| 81 | </body> |
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| 82 | </html> |
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| 83 | |
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| 84 | |
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