func (t *funcTab) add(min, max core.Address, f *Func) {
	t.entries = append(t.entries, funcTabEntry{min: min, max: max, f: f})
}
func (t *funcTab) add(min, max core.Address, f *Func) {
	t.entries = append(t.entries, funcTabEntry{min: min, max: max, f: f})
}
func ( t * funcTab ) add ( min , max core . Address , f * Func ) { t . entries = append ( t . entries , funcTabEntry { min : min , max : max , f : f } ) }
// add records that PCs in the range [min,max) map to function f.
add records that PCs in the range [ min max ) map to function f .