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:
“I am gradually drifting to the opinion that this Rebellion can only be crushed finally by either the execution of all the traitors or the abolition of slavery. Crushed, I mean, so as to remove all danger of its breaking out again in the future.”
—Rutherford Birchard Hayes (1822–1893)
“Union of Religious Sentiments begets a surprising confidence and Ecclesiastical Establishments tend to great ignorance and corruption, all of which facilitate the Execution of Mischievous Projects.”
—James Madison (1751–1836)
“My weakness has always been to prefer the large intention of an unskilful artist to the trivial intention of an accomplished one: in other words, I am more interested in the high ideas of a feeble executant than in the high execution of a feeble thinker.”
—Thomas Hardy (1840–1928)