| 摘要 |
A method system for optimizing a computer program. In one embodiment, the system identifies depths of blocks of a computer program and identifies the availability of expressions of the computer program. The system then modifies the computer program when he identified availability of the expression and the identified depth of a block indicate that the expression can be moved to the block. The depth of the block may represent the number of dominator blocks of that block. The availability of the expression may represent the depth of a block to which the expression may be moved. In one embodiment, when the identified availability of the expression is less than the identified depth of the block, the expression can be moved to the block. |
