SYS_ADJTIME              = 421 // { int|sys|50|adjtime(const struct timeval *delta, struct timeval *olddelta); }
	SYS_FUTIMES              = 423 // { int|sys|50|futimes(int fd, const struct timeval *tptr); }
	SYS_LUTIMES              = 424 // { int|sys|50|lutimes(const char *path, const struct timeval *tptr); }

	SYS_ADJTIME              = 421 // { int|sys|50|adjtime(const struct timeval *delta, struct timeval *olddelta); }
	SYS_FUTIMES              = 423 // { int|sys|50|futimes(int fd, const struct timeval *tptr); }
	SYS_LUTIMES              = 424 // { int|sys|50|lutimes(const char *path, const struct timeval *tptr); }

	SYS_ADJTIME              = 421 // { int|sys|50|adjtime(const struct timeval *delta, struct timeval *olddelta); }
	SYS_FUTIMES              = 423 // { int|sys|50|futimes(int fd, const struct timeval *tptr); }
	SYS_LUTIMES              = 424 // { int|sys|50|lutimes(const char *path, const struct timeval *tptr); }

			switch t1.kind {
			case TINT8, TUINT8, TINT16, TUINT16, TINT32, TUINT32, TINT64, TUINT64, TINT, TUINT, TUINTPTR, TCOMPLEX64, TCOMPLEX128, TFLOAT32, TFLOAT64, TBOOL, TSTRING, TPTR, TUNSAFEPTR:
				return true
			}
			// fall through to unnamed type comparison for complex types.
			goto cont
		}
		// Special case: we keep byte/uint8 and rune/int32

	}
	if !t.HasPointers() {
		// Note: this case ensures that pointers to not-in-heap types
		// are not considered pointers by garbage collection and stack copying.
		return
	}

	switch t.Kind() {
	case types.TPTR, types.TUNSAFEPTR, types.TFUNC, types.TCHAN, types.TMAP:
		if off&int64(types.PtrSize-1) != 0 {
			base.Fatalf("typebits.Set: invalid alignment, %v", t)
		}
		bv.Set(int32(off / int64(types.PtrSize))) // pointer

	ir.OKForConst[types.TSTRING] = true

	okforlen[types.TARRAY] = true
	okforlen[types.TCHAN] = true
	okforlen[types.TMAP] = true
	okforlen[types.TSLICE] = true
	okforlen[types.TSTRING] = true

	okforeq[types.TPTR] = true
	okforeq[types.TUNSAFEPTR] = true
	okforeq[types.TINTER] = true
	okforeq[types.TCHAN] = true
	okforeq[types.TSTRING] = true
	okforeq[types.TBOOL] = true

	SYS_MKDIR         = 136 // { int mkdir(char *path, int mode); }
	SYS_RMDIR         = 137 // { int rmdir(char *path); }
	SYS_UTIMES        = 138 // { int utimes(char *path, struct timeval *tptr); }
	SYS_ADJTIME       = 140 // { int adjtime(struct timeval *delta, \
	SYS_SETSID        = 147 // { int setsid(void); }
	SYS_QUOTACTL      = 148 // { int quotactl(char *path, int cmd, int uid, \

		}

	case k == types.TARRAY, k == types.TSLICE, k == types.TPTR: // TPTR is pointer-to-array
		if nn := arrayRangeClear(nrange, v1, v2, a); nn != nil {
			base.Pos = lno
			return nn
		}

		// Element type of the iteration
		var elem *types.Type
		switch t.Kind() {
		case types.TSLICE, types.TARRAY:
			elem = t.Elem()
		case types.TPTR:
			elem = t.Elem().Elem()
		}

	SYS_MADVISE        = 75  // { int sys_madvise(void *addr, size_t len, int behav); }
	SYS_UTIMES         = 76  // { int sys_utimes(const char *path, const struct timeval *tptr); }
	SYS_FUTIMES        = 77  // { int sys_futimes(int fd, const struct timeval *tptr); }
	SYS_GETGROUPS      = 79  // { int sys_getgroups(int gidsetsize, gid_t *gidset); }
	SYS_SETGROUPS      = 80  // { int sys_setgroups(int gidsetsize, const gid_t *gidset); }

	SYS_MADVISE        = 75  // { int sys_madvise(void *addr, size_t len, int behav); }
	SYS_UTIMES         = 76  // { int sys_utimes(const char *path, const struct timeval *tptr); }
	SYS_FUTIMES        = 77  // { int sys_futimes(int fd, const struct timeval *tptr); }
	SYS_MINCORE        = 78  // { int sys_mincore(void *addr, size_t len, char *vec); }
	SYS_GETGROUPS      = 79  // { int sys_getgroups(int gidsetsize, gid_t *gidset); }