compiler optimizations

[jaded7]

Is there a way to enforce a compiler (g++ 4.7) to not perform any optimizations within a certain block of code?

[MiiNiPaa]

asm{<assemly code here>}

Compiler will not change your assemly code.

[bartoli]

Put that code in a separate cpp file, and compile it without optimization then link back everything together

[Caligulaminus]

Maybe:
#pragma GCC optimize ("O0")