Declare floating-point libcall selector overloads for each family.
Declared in <llvm/CodeGen/RuntimeLibcallUtil.h>
#define GET_RUNTIME_LIBCALL_FP_SELECTOR_DECLS
The floating-point selectors get<OP>(EVT) return the <OP> libcall for the given type, or UNKNOWN_LIBCALL. Generated from the RuntimeLibcallFamily table in RuntimeLibcalls.td.