Const and Optimization in CToday there was a question on /r/C_Programming about the effect of C’s const on optimization. Variations of this question have been asked many times over the past two decades. Personally, I blame naming of const. Given this program: void foo(const int *); int bar(void) { int x = 0; int y = 0; for (int i = 0; i < 10; i++) { foo(&x); y += x; // this load not optimized out } return y; } The function
