-ansi-alias is a more "generic" option than the alias options you used.  It asserts that your code complies with the standard on typed aliasing, corresponding to the default of most linux compilers.
If your code depends for performance or accuracy on performing operations in order specified by parentheses, you may find better results by adding -fp-model source  .
The optimization performed by icc is more effective on barcelona and newer AMD CPUs; there is no choice specifically for older CPUs.