static int zero(void) {
	return 0;
}
*/
import "C"

import (
	"runtime"
	"testing"
)

func testSigaltstack(t *testing.T) {
	switch {
	case runtime.GOOS == "solaris", runtime.GOOS == "illumos", runtime.GOOS == "ios" && runtime.GOARCH == "arm64":
		t.Skipf("switching signal stack not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
	}

	C.changeSignalStack()
	defer C.restoreSignalStack()
	defer func() {

  std::vector<Output> switch_trues(num_loop_vars);
  std::vector<Output> switch_falses(num_loop_vars);
  for (size_t i = 0; i < num_loop_vars; ++i) {
    auto switch_i = Switch(scope, merge_outputs[i], cond_out);
    switch_trues[i] = switch_i.output_true;
    switch_falses[i] = switch_i.output_false;
  }
  TF_RETURN_IF_ERROR(scope.status());

  std::vector<Output> body_outputs;

  ops::Switch switch_a(root.WithOpName("switch_a"), value, cond_a);
  ops::Switch switch_b(root.WithOpName("switch_b"), value, cond_b);

  Output add_a = ops::Add(root.WithOpName("add_a"), switch_a.output_true,
                          switch_b.output_true);
  Output add_b = ops::Add(root.WithOpName("add_b"), switch_a.output_true,
                          switch_b.output_true);

2020-06-29T23:37:27.336128Z	info	ccResolverWrapper: sending update to cc: {[{istiod.istio-system.svc:15012  <nil> 0 <nil>}] <nil> <nil>}
2020-06-29T23:37:27.336149Z	info	ClientConn switching balancer to "pick_first"
2020-06-29T23:37:27.336155Z	info	Channel switches to new LB policy "pick_first"
2020-06-29T23:37:27.336189Z	info	Subchannel Connectivity change to CONNECTING
2020-06-29T23:37:27.336222Z	info	Starting gateway SDS

	_Import      // import
	_Interface   // interface
	_Map         // map
	_Package     // package
	_Range       // range
	_Return      // return
	_Select      // select
	_Struct      // struct
	_Switch      // switch
	_Type        // type
	_Var         // var

	// empty line comment to exclude it from .String
	tokenCount //
)

const (
	// for BranchStmt
	Break       = _Break
	Continue    = _Continue

		}
		return p.simpleStmt(lhs, 0)
	}

	switch p.tok {
	case _Var:
		return p.declStmt(p.varDecl)

	case _Const:
		return p.declStmt(p.constDecl)

	case _Type:
		return p.declStmt(p.typeDecl)
	}

	p.clearPragma()

	switch p.tok {
	case _Lbrace:
		return p.blockStmt("")

	case _Operator, _Star:
		switch p.op {
		case Add, Sub, Mul, And, Xor, Not:

	MOVQ	$__msan_memmove(SB), AX
	JMP	msancall<>(SB)

// Switches SP to g0 stack and calls (AX). Arguments already set.
TEXT	msancall<>(SB), NOSPLIT, $0-0
	get_tls(R12)
	MOVQ	g(R12), R14
	MOVQ	SP, R12		// callee-saved, preserved across the CALL
	CMPQ	R14, $0
	JE	call	// no g; still on a system stack

	MOVQ	g_m(R14), R13
	// Switch to g0 stack.
	MOVQ	m_g0(R13), R10
	CMPQ	R10, R14
	JE	call	// already on g0

		t = n.Tag.Type()
	}

	var nilonly string
	if t != nil {
		switch {
		case t.IsMap():
			nilonly = "map"
		case t.Kind() == types.TFUNC:
			nilonly = "func"
		case t.IsSlice():
			nilonly = "slice"

		case !types.IsComparable(t):
			if t.IsStruct() {
				base.ErrorfAt(n.Pos(), errors.InvalidExprSwitch, "cannot switch on %L (struct containing %v cannot be compared)", n.Tag, types.IncomparableField(t).Type)

}

func switchBreak(x, y int) int { // ERROR "can inline switchBreak"
	var n int
	switch x {
	case 0:
		n = 1
	Done:
		switch y {
		case 0:
			n += 10
			break Done
		}
		n = 2
	}
	return n
}

func switchType(x interface{}) int { // ERROR "can inline switchType" "x does not escape"
	switch x.(type) {
	case int:
		return x.(int)
	default:
		return 0
	}
}

// The result of walkStmt MUST be assigned back to n, e.g.
//
//	n.Left = walkStmt(n.Left)
func walkStmt(n ir.Node) ir.Node {
	if n == nil {
		return n
	}

	ir.SetPos(n)

	walkStmtList(n.Init())

	switch n.Op() {
	default:
		if n.Op() == ir.ONAME {
			n := n.(*ir.Name)
			base.Errorf("%v is not a top level statement", n.Sym())
		} else {
			base.Errorf("%v is not a top level statement", n.Op())
		}