Execution
Consider the sequential execution of the list of statements, s(i), and what can now be observed as the computation at statement, j:
- A definition at statement s(i) with i < j is alive at j, if it has a use at a statement s(k) with k ≥ j. The set of alive definitions at statement i is denoted as A(i) and the number of alive definitions as |A(i)|. (A(i) is a simple but powerful concept: theoretical and practical results in space complexity theory, access complexity(I/O complexity), register allocation and cache locality exploitation are based on A(i).)
- A definition at statement s(i) kills all previous definitions (s(k) with k < i) for the same variables.
Read more about this topic: Use-define Chain
Famous quotes containing the word execution:
“Those who govern, having much business on their hands, do not generally like to take the trouble of considering and carrying into execution new projects. The best public measures are therefore seldom adopted from previous wisdom, but forced by the occasion.”
—Benjamin Franklin (1706–1790)
“It is clear that in a monarchy, where he who commands the exceution of the laws generally thinks himself above them, there is less need of virtue than in a popular government, where the person entrusted with the execution of the laws is sensible of his being subject to their direction.”
—Charles Louis de Secondat Montesquieu (1689–1755)
“The application requisite to the duties of the office I hold [governor of Virginia] is so excessive, and the execution of them after all so imperfect, that I have determined to retire from it at the close of the present campaign.”
—Thomas Jefferson (1743–1826)