28937f1196
PR middle-end/56461 * internal.h (struct cpp_buffer): Add to_free field. (_cpp_pop_file_buffer): Add third argument. * files.c (_cpp_stack_file): Set buffer->to_free. (_cpp_pop_file_buffer): Add to_free argument. Free to_free if non-NULL, and if equal to file->buffer_start, also clear file->buffer{,_start,_valid}. * directives.c (_cpp_pop_buffer): Pass buffer->to_free to _cpp_pop_file_buffer. From-SVN: r196497