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| • | Common
sub-expression elimination CSE |
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| • | Loop unrolling |
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| • | Partial
redundancy elimination PRE |
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| • | Dead-code
elimination |
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| – | code never
accessed, or result never used |
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| • | Constant
propagation and folding |
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| Control-flow analysis |
| Program re-writing |
| Data-flow analysis |
