//
// It returns an iterator that tiles typ.GCData starting from addr. It's the caller's
// responsibility to limit iteration.
//
// nosplit because its callers are nosplit and require all their callees to be nosplit.
//
//go:nosplit
func (span *mspan) typePointersOfType(typ *abi.Type, addr uintptr) typePointers {
	const doubleCheck = false

//
// Must be nosplit because it has callers that are nosplit.
//
//go:nosplit
func spanOfUnchecked(p uintptr) *mspan {
	ai := arenaIndex(p)
	return mheap_.arenas[ai.l1()][ai.l2()].spans[(p/pageSize)%pagesPerArena]
}

// spanOfHeap is like spanOf, but returns nil if p does not point to a
// heap object.
//
// Must be nosplit because it has callers that are nosplit.
//

// In case of index mode instructions, usage of
// (Rx)(R0) is equivalent to (Rx+R0)
// In case of base+displacement mode instructions if
// the offset is 0, usage of (Rx) is equivalent to 0(Rx)
TEXT asmtest(SB),DUPOK|NOSPLIT,$0
	// move constants
	MOVD $1, R3                     // 38600001
	MOVD $-1, R4                    // 3880ffff
	MOVD $65535, R5                 // 6005ffff
	MOVD $65536, R6                 // 3cc00001

// Returns the attributes of the i-th symbol.
func (l *Loader) SymAttr(i Sym) uint8 {
	if l.IsExternal(i) {
		// TODO: do something? External symbols have different representation of attributes.
		// For now, ReflectMethod, NoSplit, GoType, and Typelink are used and they cannot be
		// set by external symbol.
		return 0
	}
	r, li := l.toLocal(i)
	return r.Sym(li).Flag()
}

// Returns the size of the i-th symbol.

}

// gcTestPointerClass returns the category of what p points to, one of:
// "heap", "stack", "data", "bss", "other". This is useful for checking
// that a test is doing what it's intended to do.
//
// This is nosplit simply to avoid extra pointer shuffling that may
// complicate a test.
//
//go:nosplit
func gcTestPointerClass(p unsafe.Pointer) string {
	p2 := uintptr(noescape(p))
	gp := getg()

		sysStat.add(int64(size))
		memstats.other_sys.add(-int64(size))
	}
	return p
}

// inPersistentAlloc reports whether p points to memory allocated by
// persistentalloc. This must be nosplit because it is called by the
// cgo checker code, which is called by the write barrier code.
//
//go:nosplit
func inPersistentAlloc(p uintptr) bool {

	tg := testgo(t)
	defer tg.cleanup()
	tg.parallel()

	asm := `
#include "textflag.h"

DATA sym<>+0x0(SB)/8,$0
GLOBL sym<>(SB),(NOPTR+RODATA),$8

TEXT ·Data(SB),NOSPLIT,$0
	MOVB sym<>(SB), AX
	MOVB AX, ret+0(FP)
	RET
`
	tg.tempFile("go/src/a/a.s", asm)
	tg.tempFile("go/src/a/a.go", `package a; func Data() uint8`)
	tg.tempFile("go/src/b/b.s", asm)

			t.pos = pos
			p.next()
			t.Fun = x
			t.ArgList, t.HasDots = p.argList()
			x = t

		case _Lbrace:
			// operand may have returned a parenthesized complit
			// type; accept it but complain if we have a complit
			t := Unparen(x)
			// determine if '{' belongs to a composite literal or a block statement
			complit_ok := false
			switch t.(type) {
			case *Name, *SelectorExpr: