On Wed, Oct 28, 2009 at 6:34 PM, Basile STARYNKEVITCH <bas...@starynkevitch.net> wrote: > Hello All, > > Is there some way from a plugin to read and to write some plugin specific > LTO data? > > When glancing in lto-streamer.h I believe I see no such things. But I don't > understand all the details. > > I was thinking of e.g. functions like > > void lto_input_plugin_data(struct lto_file_decl_data*file_data, > const char* plugin_name, > char **datap, > size_t*sizep); > > A pass from the plugin FOO would call > > char* mydata = NULL; > size_t mydatasize = 0; > lto_input_plugin_data(file_data, "FOO", &mydata, &mydatasize); > > and then the buffer mydata would be malloc-ed by the LTO infrastructure and > it will be read, and mydatasize set to the size of the read data. > > For writing, I would be happy with > > void lto_output_plugin_data(struct lto_file_decl_data *file_data, > const char* plugin_name, > char* data, size_t size); > > and the plugin would call > lto_output_plugin_data(file_data, "FOO", mydata, mysize); > > Perhaps the lto_file_decl_data* type above is wrong (and should be something > else). > > Is it too late to add such a simple functionality in the LTO infrastructure.
You have to write an IPA pass, those can output/input pass specific data to the LTO sections. No need to add anything plugin specific. Richard.
