v_0 := v.Args[0]
	b := v.Block
	// match: (Select0 (Mul64uhilo x y))
	// result: (MULHVU x y)
	for {
		if v_0.Op != OpMul64uhilo {
			break
		}
		y := v_0.Args[1]
		x := v_0.Args[0]
		v.reset(OpLOONG64MULHVU)
		v.AddArg2(x, y)
		return true
	}
	// match: (Select0 (Mul64uover x y))
	// result: (MULV x y)
	for {
		if v_0.Op != OpMul64uover {

	typ := &b.Func.Config.Types
	// match: (Select0 (Mul64uhilo x y))
	// result: (MULHDU x y)
	for {
		if v_0.Op != OpMul64uhilo {
			break
		}
		y := v_0.Args[1]
		x := v_0.Args[0]
		v.reset(OpPPC64MULHDU)
		v.AddArg2(x, y)
		return true
	}
	// match: (Select0 (Add64carry x y c))
	// result: (Select0 <typ.UInt64> (ADDE x y (Select1 <typ.UInt64> (ADDCconst c [-1]))))
	for {

// license that can be found in the LICENSE file.

package runtime

// This file contains the implementation of Go select statements.

import (
	"internal/abi"
	"unsafe"
)

const debugSelect = false

// Select case descriptor.
// Known to compiler.
// Changes here must also be made in src/cmd/compile/internal/walk/select.go's scasetype.
type scase struct {
	c    *hchan         // chan
	elem unsafe.Pointer // data element
}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test for select: Issue 2075
// A bug in select corrupts channel queues of failed cases
// if there are multiple waiters on those channels and the
// select is the last in the queue. If further waits are made
// on the channel without draining it first then those waiters

// license that can be found in the LICENSE file

// Test that a select statement proceeds when a value is ready.

package main

func f() *int {
	println("BUG: called f")
	return new(int)
}

func main() {
	var x struct {
		a int
	}
	c := make(chan int, 1)
	c1 := make(chan int)
	c <- 42
	select {
	case *f() = <-c1:
		// nothing
	case x.a = <-c:
		if x.a != 42 {

package clause

// Select select attrs when querying, updating, creating
type Select struct {
	Distinct   bool
	Columns    []Column
	Expression Expression
}

func (s Select) Name() string {
	return "SELECT"
}

func (s Select) Build(builder Builder) {
	if len(s.Columns) > 0 {
		if s.Distinct {
			builder.WriteString("DISTINCT ")
		}

		for idx, column := range s.Columns {
			if idx > 0 {
				builder.WriteByte(',')

// license that can be found in the LICENSE file.

// Test select when discarding a value.

package main

import "runtime"

func recv1(c <-chan int) {
	<-c
}

func recv2(c <-chan int) {
	select {
	case <-c:
	}
}

func recv3(c <-chan int) {
	c2 := make(chan int)
	select {
	case <-c:
	case <-c2:
	}
}

func send1(recv func(<-chan int)) {

	// optimization: zero-case select
	if ncas == 0 {
		return []ir.Node{mkcallstmt("block")}
	}

	// optimization: one-case select: single op.
	if ncas == 1 {
		cas := cases[0]
		ir.SetPos(cas)
		l := cas.Init()
		if cas.Comm != nil { // not default:
			n := cas.Comm
			l = append(l, ir.TakeInit(n)...)
			switch n.Op() {
			default:
				base.Fatalf("select %v", n.Op())

			case ir.OSEND:

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test simple select.

package main

var counter uint
var shift uint

func GetValue() uint {
	counter++
	return 1 << shift
}

func Send(a, b chan uint) int {
	var i int

LOOP:
	for {
		select {
		case a <- GetValue():
			i++
			a = nil
		case b <- GetValue():
			i++
			b = nil
		default:

// license that can be found in the LICENSE file.

package codegen

func f() {
	ch1 := make(chan int)
	ch2 := make(chan int)
	for {
		// amd64:-`MOVQ\t[$]0, command-line-arguments..autotmp_3`
		select {
		case <-ch1:
		case <-ch2:
		default:
		}
	}