(SPARC) #pragma no_side_effect (funcname)

funcname specifies the name of a function within the current translation unit. The function must be declared prior to the pragma. The pragma must be specified prior to the function's definition. For the named function, funcname, the pragma declares that the function has no side effects of any kind. The compiler can use this information when doing optimizations using the function. If the function does have side effects, the results of executing a program which calls this function are undefined. The compiler takes advantage of this information at optimization level of 3 or above.