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ramntry/SCEV.md

Created July 13, 2018 00:35
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SCEV.md 
  // |  Expression   |     ConstantRange      |       KnownBits       |
  // |---------------|------------------------|-----------------------|
  // | i8 4 * X      | [L: 0, U: 253)         | XXXX XX00             |
  // |               |   => Min: 0, Max: 252  |   => Min: 0, Max: 252 |
  // |               |                        |                       |
  // | i8 4 * X + 5  | [L: 5, U: 2) (wrapped) | YYYY YY01             |
  // |         (101) |   => Min: 0, Max: 255  |   => Min: 1, Max: 253 |
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