On Thu, Dec 5, 2013 at 3:54 PM, Jan Hubicka <hubi...@ucw.cz> wrote: >> On Thu, 21 Nov 2013, Jan Hubicka wrote: >> >> > > >> > > Why do you need an additional -fparallelism? Wouldn't >> > > -fwpa=... be a better match, matching -flto=...? As we already >> > > pass down a -fwpa option to WPA this would make things easier, no? >> > >> > My plan was to possibly use same option later for parallelizing more parts >> > of >> > compiler, not only WPA streaming. Streaming in may have some chance if we >> > get >> > into thread safety of GGC or move sufficient amount of stuff out of GGC. >> > Also >> > we can parallelize inliner heuristic or IPA-PTA if it will ever work. So it >> > would make sense with -flto-partition=none and perhaps with local >> > optimization, >> > too. >> >> I'd like to drop -flto-partition=none eventually. It's just one more >> path through the compiler to support ... >> >> > But I can definitely update the patch to use -fwpa=N and we can deal with >> > this >> > once this becomes real. (i.e. I have no clue how to parallelize inliner >> > without >> > making its decisions dependent on the parallelizm and declining with >> > parallelizm >> > increased nor I have real plans for stream in procedure) >> >> Please. >> > > Hi, > here is updated patch. Sorry for taking time, I should have more time for > hacking again > now... > > Honza > > * lto-cgraph.c (asm_nodes_output): Make global. > * lto-wrapper.c (run_gcc): Pass down paralelizm to WPA. > * lto.c (lto_parallelism): New static var. > (do_stream_out, wait_for_child, stream_out): New static functions. > (lto_wpa_write_files): Add support for parallel streaming. > (do_whole_program_analysis): Set parallelism. > * lang.opt (fwpa): Add parameter. > * lto-lang.c (lto_handle_option): Handle flag_wpa. > (lto_init): Update use of flag_wpa. > * lto-streamer.h (asm_nodes_output): Declare.
This caused: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60295 H.J.
