base.Fatalf("unhandled declaration tag %v", d.tag)
		}
	}
}

// LookupCoverage looks up the Go function 'name' in package
// runtime/coverage. This function must follow the internal calling
// convention.
func LookupCoverage(name string) *ir.Name {
	sym := ir.Pkgs.Coverage.Lookup(name)
	if sym == nil {
		base.Fatalf("LookupCoverage: can't find runtime/coverage.%s", name)
	}
	return sym.Def.(*ir.Name)

// an exit hook to emit counter data).
func addInitHookCall(initfn *ir.Func, cmode coverage.CounterMode) {
	typecheck.InitCoverage()
	pos := initfn.Pos()
	istest := cmode == coverage.CtrModeTestMain
	initf := typecheck.LookupCoverage("initHook")
	istestNode := ir.NewBool(base.Pos, istest)
	args := []ir.Node{istestNode}
	callx := typecheck.Call(pos, initf, args, false)
	initfn.Body.Append(callx)