SMI_ONLY          480 src/ast.cc         compare_type_ = SMI_ONLY;
SMI_ONLY          610 src/ast.cc         compare_type_ = SMI_ONLY;
SMI_ONLY         1003 src/ast.h        bool IsSmiCompare() { return compare_type_ == SMI_ONLY; }
SMI_ONLY         1854 src/ast.h        bool IsSmiCompare() { return compare_type_ == SMI_ONLY; }