// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Tests coroutine switches.

//go:build ignore

package main

import (
	"iter"
	"log"
	"os"
	"runtime/trace"
	"sync"
)

func main() {
	// Start tracing.
	if err := trace.Start(os.Stdout); err != nil {
		log.Fatalf("failed to start tracing: %v", err)
	}

// 	return b[0], err
// }
//
// // type assertions and type switches over generic types are strict
// type I3 interface {
//         m(int)
// }
//
// type I4 interface {
//         m() int // different signature from I3.m
// }
//
// func _[T I3](x I3, p T) {
//         // type assertions and type switches over interfaces are not strict
//         _ = x.(I4)
//         switch x.(type) {

	MOVD	dst+0(FP), RARG0
	MOVD	src+8(FP), RARG1
	MOVD	sz+16(FP), RARG2
	// void __msan_memmove(void *dst, void *src, uintptr_t sz);
	MOVD	$__msan_memmove(SB), FARG
	JMP	msancall<>(SB)

// Switches SP to g0 stack and calls (FARG). Arguments already set.
TEXT	msancall<>(SB), NOSPLIT, $0-0
	MOVD	RSP, R19                  // callee-saved
	CBZ	g, g0stack                // no g, still on a system stack
	MOVD	g_m(g), R10

	// ITab is an expression that yields a *runtime.itab value
	// representing the asserted type within the assertee expression's
	// original interface type.
	//
	// ITab is only used for assertions (including type switches) from
	// non-empty interface type to a concrete (i.e., non-interface)
	// type. For all other assertions, ITab is nil.
	ITab Node
}

func NewDynamicType(pos src.XPos, rtype Node) *DynamicType {

	MOVD	addr+0(FP), RARG0
	MOVD	n+8(FP), RARG1
	// void __asan_register_globals_go(void *addr, uintptr_t n);
	MOVD	$__asan_register_globals_go(SB), FARG
	JMP	asancall<>(SB)

// Switches SP to g0 stack and calls (FARG). Arguments already set.
TEXT	asancall<>(SB), NOSPLIT, $0-0
	MOVD	RSP, R19                  // callee-saved
	CBZ	g, g0stack                // no g, still on a system stack
	MOVD	g_m(g), R10

	MOVV	dst+0(FP), RARG0
	MOVV	src+8(FP), RARG1
	MOVV	sz+16(FP), RARG2
	// void __msan_memmove(void *dst, void *src, uintptr_t sz);
	MOVV	$__msan_memmove(SB), FARG
	JMP	msancall<>(SB)

// Switches SP to g0 stack and calls (FARG). Arguments already set.
TEXT	msancall<>(SB), NOSPLIT, $0-0
	MOVV	R3, R23         // callee-saved
	BEQ	g, g0stack      // no g, still on a system stack
	MOVV	g_m(g), R14
	MOVV	m_g0(R14), R15

	MOVV	addr+0(FP), RARG0
	MOVV	n+8(FP), RARG1
	// void __asan_register_globals_go(void *addr, uintptr_t n);
	MOVV	$__asan_register_globals_go(SB), FARG
	JMP	asancall<>(SB)

// Switches SP to g0 stack and calls (FARG). Arguments already set.
TEXT	asancall<>(SB), NOSPLIT, $0-0
	MOVV	R3, R23         // callee-saved
	BEQ	g, g0stack      // no g, still on a system stack
	MOVV	g_m(g), R14
	MOVV	m_g0(R14), R15

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.annotation.CheckForNull;

/**
 * An {@link OutputStream} that starts buffering to a byte array, but switches to file buffering
 * once the data reaches a configurable size.
 *
 * <p>When this stream creates a temporary file, it restricts the file's permissions to the current

	MOVQ	dst+0(FP), RARG0
	MOVQ	src+8(FP), RARG1
	MOVQ	sz+16(FP), RARG2
	// void __msan_memmove(void *dst, void *src, uintptr_t sz);
	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

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.annotation.CheckForNull;

/**
 * An {@link OutputStream} that starts buffering to a byte array, but switches to file buffering
 * once the data reaches a configurable size.
 *
 * <p>When this stream creates a temporary file, it restricts the file's permissions to the current