1917     wordnode_T	*si_foldroot;	// tree with case-folded words  member
4400 	    res = tree_add_word(spin, foldword, spin->si_foldroot, ct | flags,  in store_word()
4596 	wordtree_compress(spin, spin->si_foldroot, "case-folded");  in tree_add_word()
5230 	    tree = spin->si_foldroot->wn_sibling;  in write_vim_spell()
5519     wordtree_compress(spin, spin->si_foldroot, "case-folded");  in spell_make_sugfile()
5561     spin->si_foldroot = wordtree_alloc(spin);  in sug_filltree()
5562     if (spin->si_foldroot == NULL)  in sug_filltree()
5608 		if (tree_add_word(spin, tsalword, spin->si_foldroot,  in sug_filltree()
5668     if (sug_filltable(spin, spin->si_foldroot->wn_sibling, 0, &ga) == -1)  in sug_maketable()
5830     tree = spin->si_foldroot->wn_sibling;  in sug_write()
6014 	spin.si_foldroot = wordtree_alloc(&spin);  in mkspell()
6017 	if (spin.si_foldroot == NULL  in mkspell()
6081 	    wordtree_compress(&spin, spin.si_foldroot, "case-folded");  in mkspell()