// For example:
// s = {a1, a2, a3}
// s2 = {a1, a2, a4, a5}
// s.Union(s2) = s2.Union(s) = {a1, a2, a3, a4, a5}
func (s Set[T]) Union(s2 Set[T]) Set[T] {
	result := s.Copy()
	for key := range s2 {
		result.Insert(key)
	}
	return result
}

// Difference returns a set of objects that are not in s2
// For example:
// s = {a1, a2, a3}
// s2 = {a1, a2, a4, a5}
// s.Difference(s2) = {a3}

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

#include "textflag.h"

// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
TEXT ·Syscall6(SB),NOSPLIT,$0-80
	MOVD	num+0(FP), R8	// syscall entry
	MOVD	a1+8(FP), R0
	MOVD	a2+16(FP), R1
	MOVD	a3+24(FP), R2
	MOVD	a4+32(FP), R3
	MOVD	a5+40(FP), R4
	MOVD	a6+48(FP), R5
	SVC
	CMN	$4095, R0
	BCC	ok
	MOVD	$-1, R4
	MOVD	R4, r1+56(FP)

	return newoffset, err
}

func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (int, syscall.Errno) {
	fd, _, err := Syscall(SYS_SOCKETCALL, uintptr(call), uintptr(unsafe.Pointer(&a0)), 0)
	return int(fd), err
}

func rawsocketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (int, syscall.Errno) {
	fd, _, err := RawSyscall(SYS_SOCKETCALL, uintptr(call), uintptr(unsafe.Pointer(&a0)), 0)

//go:build linux && (mips64 || mips64le)

#include "textflag.h"

// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
TEXT ·Syscall6(SB),NOSPLIT,$0-80
	MOVV	num+0(FP), R2	// syscall entry
	MOVV	a1+8(FP), R4
	MOVV	a2+16(FP), R5
	MOVV	a3+24(FP), R6
	MOVV	a4+32(FP), R7
	MOVV	a5+40(FP), R8
	MOVV	a6+48(FP), R9
	MOVV	R0, R3	// reset R3 to 0 as 1-ret SYSCALL keeps it
	SYSCALL

// Implemented in assembly to avoid allocation.
func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno)

func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err syscall.Errno)

00000160  10 c9 1d 51 3e 93 5f 6c  02 1c 38 fe 78 44 1a ea  |...Q>._l..8.xD..|
00000170  99 a4 ef 7d 03 ce 71 95  d7 1d e1 b3 b8 e2 20 99  |...}..q....... .|
00000180  aa 30 0f c1 75 a7 0d 39  98 12 96 27 c6 39 b8 57  |.0..u..9...'.9.W|
00000190  6e ab 79 c7 91 c2 56 9d  b3 e1 cb 17 6a cc 42 47  |n.y...V.....j.BG|
000001a0  fc a4 52 10 ab cd 4b 1f  65 3e 35 61 ed 38 99 7b  |..R...K.e>5a.8.{|

	t.a = &B{91, 92, 93, 94}
	runtime.GC()
	return t
}

// large (non-SSAable) struct
type A4 struct {
	a, b, c, d, e, f *B
}

//go:noinline
func f4() (t A4) {
	t.a = &B{91, 92, 93, 94}
	runtime.GC()
	return t
}

var sink *B

func f5() int {
	b := &B{91, 92, 93, 94}
	t := A4{b, nil, nil, nil, nil, nil}
	sink = b   // make sure b is heap allocated ...
	sink = nil // ... but not live

package unix

import "syscall"

// Implemented as sysvicall6 in runtime/syscall_solaris.go.
func syscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno)

// Implemented as rawsysvicall6 in runtime/syscall_solaris.go.
func rawSyscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno)

//go:cgo_import_dynamic libc_fstatat fstatat "libc.so"

// Valid type alias declarations.

type _ = T0
type _ = int
type _ = struct{}
type _ = reflect.Value
type _ = Value

type (
	A0 = T0
	A1 = int
	A2 = struct{}
	A3 = reflect.Value
	A4 = Value
	A5 = Value

	N0 A0
)

// Methods can be declared on the original named type and the alias.
func (T0) m1()  {} // GCCGO_ERROR "previous"

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

#include "textflag.h"

// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
TEXT ·Syscall6(SB),NOSPLIT,$0-80
	MOVD	num+0(FP), R1	// syscall entry
	MOVD	a1+8(FP), R2
	MOVD	a2+16(FP), R3
	MOVD	a3+24(FP), R4
	MOVD	a4+32(FP), R5
	MOVD	a5+40(FP), R6
	MOVD	a6+48(FP), R7
	SYSCALL
	MOVD	$0xfffffffffffff001, R8
	CMPUBLT	R2, R8, ok