Bad code for ia64 with function pointer

[Jim Wilson]

Your program is broken.  You made assumptions about the form of a function
pointer which are wrong.

On IA-64, and some other targets, function pointers are represented
differently than pointers to objects.  On IA-64, a function pointer is a double
word descriptor that holds the function address and the function GP value.
Thus you can't get a valid function pointer by casting a char * pointer to a
function pointer type.

Jim