lossless_negate   258 src/HexagonOptimize.cpp         Expr a = lossless_negate(m->a);
lossless_negate   262 src/HexagonOptimize.cpp         Expr b = lossless_negate(m->b);
lossless_negate   676 src/HexagonOptimize.cpp             Expr neg_b = lossless_negate(op->b);