deadhead 2002 src/cmd/cc/sub.c if(!deadhead(n->left, caseok)) deadhead 2023 src/cmd/cc/sub.c return deadhead(n->right, 1); deadhead 2039 src/cmd/cc/sub.c return deadhead(n->right->left, caseok) && deadhead(n->right->right, caseok); deadhead 2051 src/cmd/cc/sub.c return deadhead(c->left, 0) && deadhead(c->right, 0);