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Expression Simplification Some expressions can be simplified by replacing them with an equivalent expression that is more efficient. Example: The code fragment below contains several examples of expressions that can be simplified. void f (int i) { a[0] = i + 0; a[1] = i * 0; a[2] = i - i; a[3] = 1 + i + 1; } Below is the code fragment after expression simplification. void f (int i) { a[0] = i; a[1] = 0; a[2] = 0; a[3] = 2 + i; } Notes: Programmers generally do not write expressions like (i + 0) directly, but these expressions can be introduced after macro expansion, array index arithmetic expansion, and other optimizations. © 1990-2012 Nullstone Corporation. All Rights Reserved.