What optimizations are used in C and C++?

Question

C++ / C#

I would like to see a list of optimizations performed by the compiler. I don't need a full list of low-level optimizations, such as placing variables in registers, but rather things like evaluating constant expressions or expanding simple methods (get/set). What optimizations are different in C and C++? In particular, I'm considering gcc.

Answer 1

I don't need a full list of low-level optimizations, such as placing variables in registers, but rather things like evaluating constant expressions or expanding simple methods (get/set). What optimizations are different in C and C++? In particular, I'm considering gcc.

gcc -Q --help=optimizerswill list all currently enabled (other command line options) optimizations. What each of the -f* switches means can be found here: https://gcc.gnu.org/onlinedocs/gcc/Optimize-Option...