func convT64(val uint64) unsafe.Pointer
func convTstring(val string) unsafe.Pointer
func convTslice(val []uint8) unsafe.Pointer

// interface type assertions x.(T)
func assertE2I(inter *byte, typ *byte) *byte
func assertE2I2(inter *byte, typ *byte) *byte
func panicdottypeE(have, want, iface *byte)
func panicdottypeI(have, want, iface *byte)
func panicnildottype(want *byte)
func typeAssert(s *byte, typ *byte) *byte

		x := s.expr(n.X)
		if to == from {
			return x
		}

		// Special case for not confusing GC and liveness.
		// We don't want pointers accidentally classified
		// as not-pointers or vice-versa because of copy
		// elision.
		if to.IsPtrShaped() != from.IsPtrShaped() {
			return s.newValue2(ssa.OpConvert, to, x, s.mem())
		}

//	    }
//	    // clear the new portion of the underlying array.
//	    hp := &s[len(s)-l2]
//	    hn := l2 * sizeof(T)
//	    memclr(hp, hn)
//	  }
//	}
//	s
//
//	if T has pointers, the final memclr can go inside the "then" branch, as
//	growslice will have done the clearing for us.

func extendSlice(n *ir.CallExpr, init *ir.Nodes) ir.Node {

// StaticName returns a name backed by a (writable) static data symbol.
// Use readonlystaticname for read-only node.
func StaticName(t *types.Type) *ir.Name {
	// Don't use LookupNum; it interns the resulting string, but these are all unique.
	sym := typecheck.Lookup(fmt.Sprintf("%s%d", obj.StaticNamePref, statuniqgen))
	statuniqgen++

	n := ir.NewNameAt(base.Pos, sym, t)
	sym.Def = n

// allocated temporary variable of type [len]elem. This variable is
// initialized, and elem must not contain pointers.
func stackBufAddr(len int64, elem *types.Type) *ir.AddrExpr {
	if elem.HasPointers() {
		base.FatalfAt(base.Pos, "%v has pointers", elem)
	}
	tmp := typecheck.TempAt(base.Pos, ir.CurFunc, types.NewArray(elem, len))
	return typecheck.Expr(typecheck.NodAddr(tmp)).(*ir.AddrExpr)

always include Go pointers. This is true of string, slice, interface,
channel, map, and function types. A pointer type may hold a Go pointer
or a C pointer. Array and struct types may or may not include Go
pointers, depending on the element types. All the discussion below
about Go pointers applies not just to pointer types, but also to other
types that include Go pointers.

	AMEM           // Type can be compared/hashed as regular memory.
	AMEM0          // Specific subvariants of AMEM (TODO: move to ../reflectdata?)
	AMEM8
	AMEM16
	AMEM32
	AMEM64
	AMEM128
	ASTRING
	AINTER
	ANILINTER
	AFLOAT32
	AFLOAT64
	ACPLX64
	ACPLX128
	ASPECIAL // Type needs special comparison/hashing functions.
)

// Most kinds are priority 0. Higher numbers are higher priority, in that

		for _, k := range nameKinds {
			if strings.HasPrefix(t, k+"_") {
				return true
			}
		}
	}
	return false
}

// rewriteCalls rewrites all calls that pass pointers to check that
// they follow the rules for passing pointers between Go and C.
// This reports whether the package needs to import unsafe as _cgo_unsafe.
func (p *Package) rewriteCalls(f *File) bool {
	needsUnsafe := false

// corresponding object, and that object's type is the (possibly generic) Named
// type. Declared Named types are identical if and only if their pointers are
// identical. On the other hand, multiple instantiated Named types may be
// identical even though their pointers are not identical. One has to use
// Identical to compare them. For instantiated named types, their obj is a

			reported[key] = true
			base.Errorf("internal error: duplicate loads of %s", pkg.ImportPath)
		}
		seen[key] = true
	}
	base.ExitIfErrors()
}

// mainPackagesOnly filters out non-main packages matched only by arguments
// containing "..." and returns the remaining main packages.
//
// Packages with missing, invalid, or ambiguous names may be treated as
// possibly-main packages.
//