On Wed, Jun 21, 2023 at 8:55 AM Gerd Hoffmann <kra...@redhat.com> wrote: > > On Wed, Jun 21, 2023 at 01:40:06AM +0100, Pedro Falcato wrote: > > On Tue, 20 Jun 2023, 12:11 Li, Yi, <yi1...@intel.com> wrote: > > > > > The effect of LTO is limited with optimization turned off, and blocked > > > the upgrade of Openssl3.0. We already skipped this build with VS2019, > > > skip the GCC NOOPT build also. > > > > > Hi, > > > > If LTO is the problem here, have you given ffunction-sections + > > fdata-sections + gc-sections a spin? > > lto alone works and reduces size a bit, also turning on optimizations > has a much bigger effect though. Which I suspect happens because gcc > detects constant expressions then, calculates them at compile time > instead of runtime, which in turn removes function calls in code paths > never taken.
Right, LTO is of course a lot less limited when it comes to this and may give out further size reductions. But if we can't enable LTO (as in NOOPT), gc-sections /may/ help here; gc-sections will *not* affect debugging whatsoever. Of course, whether this works is pure speculation; I personally haven't tested this. -- Pedro -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#106263): https://edk2.groups.io/g/devel/message/106263 Mute This Topic: https://groups.io/mt/99641869/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
