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| 22 | <a href="./Home">MLton 20180207</a>\r |
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| 26 | <h1>SSA2Simplify</h1>\r |
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| 31 | <div class="paragraph"><p>The optimization passes for the <a href="SSA2">SSA2</a> <a href="IntermediateLanguage">IntermediateLanguage</a> are\r |
| 32 | collected and controlled by the <span class="monospaced">Simplify2</span> functor\r |
| 33 | (<a href="https://github.com/MLton/mlton/blob/master/mlton/ssa/simplify2.sig"><span class="monospaced">simplify2.sig</span></a>,\r |
| 34 | <a href="https://github.com/MLton/mlton/blob/master/mlton/ssa/simplify2.fun"><span class="monospaced">simplify2.fun</span></a>).</p></div>\r |
| 35 | <div class="paragraph"><p>The following optimization passes are implemented:</p></div>\r |
| 36 | <div class="ulist"><ul>\r |
| 37 | <li>\r |
| 38 | <p>\r |
| 39 | <a href="DeepFlatten">DeepFlatten</a>\r |
| 40 | </p>\r |
| 41 | </li>\r |
| 42 | <li>\r |
| 43 | <p>\r |
| 44 | <a href="RefFlatten">RefFlatten</a>\r |
| 45 | </p>\r |
| 46 | </li>\r |
| 47 | <li>\r |
| 48 | <p>\r |
| 49 | <a href="RemoveUnused">RemoveUnused</a>\r |
| 50 | </p>\r |
| 51 | </li>\r |
| 52 | <li>\r |
| 53 | <p>\r |
| 54 | <a href="Zone">Zone</a>\r |
| 55 | </p>\r |
| 56 | </li>\r |
| 57 | </ul></div>\r |
| 58 | <div class="paragraph"><p>There are additional analysis and rewrite passes that augment many of the other optimization passes:</p></div>\r |
| 59 | <div class="ulist"><ul>\r |
| 60 | <li>\r |
| 61 | <p>\r |
| 62 | <a href="Restore">Restore</a>\r |
| 63 | </p>\r |
| 64 | </li>\r |
| 65 | <li>\r |
| 66 | <p>\r |
| 67 | <a href="Shrink">Shrink</a>\r |
| 68 | </p>\r |
| 69 | </li>\r |
| 70 | </ul></div>\r |
| 71 | <div class="paragraph"><p>The optimization passes can be controlled from the command-line by the options</p></div>\r |
| 72 | <div class="ulist"><ul>\r |
| 73 | <li>\r |
| 74 | <p>\r |
| 75 | <span class="monospaced">-diag-pass <pass></span> — keep diagnostic info for pass\r |
| 76 | </p>\r |
| 77 | </li>\r |
| 78 | <li>\r |
| 79 | <p>\r |
| 80 | <span class="monospaced">-disable-pass <pass></span> — skip optimization pass (if normally performed)\r |
| 81 | </p>\r |
| 82 | </li>\r |
| 83 | <li>\r |
| 84 | <p>\r |
| 85 | <span class="monospaced">-enable-pass <pass></span> — perform optimization pass (if normally skipped)\r |
| 86 | </p>\r |
| 87 | </li>\r |
| 88 | <li>\r |
| 89 | <p>\r |
| 90 | <span class="monospaced">-keep-pass <pass></span> — keep the results of pass\r |
| 91 | </p>\r |
| 92 | </li>\r |
| 93 | <li>\r |
| 94 | <p>\r |
| 95 | <span class="monospaced">-loop-passes <n></span> — loop optimization passes\r |
| 96 | </p>\r |
| 97 | </li>\r |
| 98 | <li>\r |
| 99 | <p>\r |
| 100 | <span class="monospaced">-ssa2-passes <passes></span> — ssa optimization passes\r |
| 101 | </p>\r |
| 102 | </li>\r |
| 103 | </ul></div>\r |
| 104 | </div>\r |
| 105 | </div>\r |
| 106 | </div>\r |
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