GCC 4.4: Avoid range check on switch/case statement in gcc?

Question

This is only an issue on GCC versions prior to 4.4, this was fixed in GCC 4.5.

Is it possible to tell the compiler the variable used in a switch fits within the provided

Answer 1

Have you tried declaring the switch variable as a bitfield?

struct Container {
  uint16_t a:3;
  uint16_t unused:13;
};

struct Container cont;

cont.a = 5;  /* assign some value */
switch( cont.a ) {
...
}

Hope this works!