If I have an optimization set up to run in LTO (call it my_opt) and the flags -flto-partition=one, -flto options and -fmy-opt are set then the optimization might or might not be run depending of whether it can all fit in one partition.
What I'm thinking is as long as it's a fatal error detectable anywhere upstream in the compilation to not specify -fmy-opt without -flto-partition=one then all will be well. So how do I detect it at all and where would I put the checking? Gary ________________________________ From: Richard Biener <richard.guent...@gmail.com> Sent: Monday, January 13, 2020 2:30 AM To: Gary Oblock <gobl...@marvell.com>; Jan Hubicka <hubi...@ucw.cz> Cc: gcc@gcc.gnu.org <gcc@gcc.gnu.org> Subject: [EXT] Re: Option processing question External Email ---------------------------------------------------------------------- On Sat, Jan 11, 2020 at 4:47 AM Gary Oblock <gobl...@marvell.com> wrote: > > I'm writing an LTO optimization that requires "-flto-partition=one" How can I > make > sure that this is the case? I've spent hours greping the code and the > Internals Doc is > worth less than nothing for something like this. That's of course because you shouldn't be doing this ;) > If you have an answer or even > I good idea of where to look please let me know. Note, for an normal "-fbalh" > there's > a flag_blah that I could look at but for this there seems to be zip, nil, > diddly squat, etc. At LTRANS time you indeed don't know. But there's -flto-partition=none (none, not one), that you can detect somehow (I think in_lto_p && !flag_ltrans && !flag_wpa). Richard. > Many thanks, > > Gary
