go/src/cmd/compile/internal/gc/main.go

// handlePanic ensures that we print out an "internal compiler error" for any panic
// or runtime exception during front-end compiler processing (unless there have
// already been some compiler errors). It may also be invoked from the explicit panic in
// hcrash(), in which case, we pass the panic on through.
func handlePanic() { … }

// Main parses flags and Go source files specified in the command-line
// arguments, type-checks the parsed Go package, compiles functions to machine
// code, and finally writes the compiled package definition to disk.
func Main(archInit func(*ssagen.ArchInfo)) { … }

func writebench(filename string) error { … }

func makePos(b *src.PosBase, line, col uint) src.XPos { … }