return
	}

	// determine token string
	var tok string
	switch p.tok {
	case _Name:
		tok = "name " + p.lit
	case _Semi:
		tok = p.lit
	case _Literal:
		tok = "literal " + p.lit
	case _Operator:
		tok = p.op.String()
	case _AssignOp:
		tok = p.op.String() + "="
	case _IncOp:
		tok = p.op.String()
		tok += tok
	default:
		tok = tokstring(p.tok)
	}

	for i, rc := range cases {
		var j int
		switch rc.dir {
		case selectDefault:
			dflt = i
			continue
		case selectSend:
			j = nsends
			nsends++
		case selectRecv:
			nrecvs++
			j = len(cases) - nrecvs
		}

		sel[j] = scase{c: rc.ch, elem: rc.val}
		orig[j] = i
	}

	// Only a default case.
	if nsends+nrecvs == 0 {
		return dflt, false
	}

	// Now generate all the case bodies
	for i, ncase := range sw.Cases {
		sw.Compiled.Append(ir.NewLabelStmt(ncase.Pos(), labels[i]))
		if caseVar := ncase.Var; caseVar != nil {
			val := s.srcName
			if len(ncase.List) == 1 {
				// single type. We have to downcast the input value to the target type.
				if ncase.List[0].Op() == ir.OTYPE { // single compile-time known type

				case 'D':
					src = 8
				}
			}
		case "loong64", "mips", "mipsle", "mips64", "mips64le":
			switch op {
			case "MOVB", "MOVBU":
				src = 1
			case "MOVH", "MOVHU":
				src = 2
			case "MOVW", "MOVWU", "MOVF":
				src = 4
			case "MOVV", "MOVD":
				src = 8
			}
		case "s390x":
			switch op {
			case "MOVB", "MOVBZ":
				src = 1
			case "MOVH", "MOVHZ":
				src = 2

	case REG_CR + 5:
		return Ycr5
	case REG_CR + 6:
		return Ycr6
	case REG_CR + 7:
		return Ycr7
	case REG_CR + 8:
		return Ycr8

	case REG_DR + 0:
		return Ydr0
	case REG_DR + 1:
		return Ydr1
	case REG_DR + 2:
		return Ydr2
	case REG_DR + 3:
		return Ydr3
	case REG_DR + 4:
		return Ydr4
	case REG_DR + 5:
		return Ydr5
	case REG_DR + 6:
		return Ydr6

		refull    *Regexp
		nfail     int
		ncase     int
	)
	for lineno := 1; scanner.Scan(); lineno++ {
		line := scanner.Text()
		switch {
		case line == "":
			t.Fatalf("%s:%d: unexpected blank line", file, lineno)
		case line[0] == '#':
			continue
		case 'A' <= line[0] && line[0] <= 'Z':
			// Test name.
			t.Logf("%s\n", line)
			continue
		case line == "strings":
			str = str[:0]

	case C_S16CON:
		return cmp(C_U15CON, b)
	case C_U16CON:
		return cmp(C_U15CON, b)
	case C_16CON:
		return cmp(C_S16CON, b) || cmp(C_U16CON, b)
	case C_U31CON:
		return cmp(C_U16CON, b)
	case C_U32CON:
		return cmp(C_U31CON, b)
	case C_S32CON:
		return cmp(C_U31CON, b) || cmp(C_S16CON, b)
	case C_32CON:
		return cmp(C_S32CON, b) || cmp(C_U32CON, b)
	case C_S34CON:

	case *ExprStmt:
		Walk(v, n.X)

	case *SendStmt:
		Walk(v, n.Chan)
		Walk(v, n.Value)

	case *IncDecStmt:
		Walk(v, n.X)

	case *AssignStmt:
		walkList(v, n.Lhs)
		walkList(v, n.Rhs)

	case *GoStmt:
		Walk(v, n.Call)

	case *DeferStmt:
		Walk(v, n.Call)

	case *ReturnStmt:
		walkList(v, n.Results)

	case *BranchStmt:
		if n.Label != nil {
			Walk(v, n.Label)
		}

	case ObjectAccessedHead:
		return "s3:ObjectAccessed:Head"
	case ObjectAccessedAttributes:
		return "s3:ObjectAccessed:Attributes"
	case ObjectCreatedAll:
		return "s3:ObjectCreated:*"
	case ObjectCreatedCompleteMultipartUpload:
		return "s3:ObjectCreated:CompleteMultipartUpload"
	case ObjectCreatedCopy:
		return "s3:ObjectCreated:Copy"
	case ObjectCreatedPost:
		return "s3:ObjectCreated:Post"
	case ObjectCreatedPut:

	case DestinationRule_v1beta1:
		return false
	case DestinationRule_v1:
		return false
	case EndpointSlice:
		return false
	case Endpoints:
		return false
	case EnvoyFilter:
		return false
	case GRPCRoute:
		return false
	case GRPCRoute_v1alpha2:
		return false
	case Gateway:
		return false
	case Gateway_v1beta1:
		return false
	case Gateway_v1:
		return false
	case GatewayClass: