On Thu, 4 Mar 2021 07:46:18 -0600 Adam Ford <[email protected]> wrote:
> On Thu, Mar 4, 2021 at 4:43 AM Marek Behun <[email protected]> wrote: > > > > On Wed, 3 Mar 2021 16:36:05 -0500 > > Tom Rini <[email protected]> wrote: > > > > > So, as I start testing things locally with two additional changes (1. > > > LTO by default 2. No ffunction/data-sections with LTO) we see: > > > https://gist.github.com/trini/350ab850c42293563228b8d68a1bb89a > > > as the detailed size reduction. This also shows that with LTO we want > > > to turn off -ffunction-sections/etc as it's not useful now. > > > > Tom, I have pushed another version to github PR to trigger CI, and am > > still working on clang. You can look at the github PR if you want to > > try yourself. I have also added patch that disables > > -ffunction-section/fdata-section on arm. > > > > After I manage to make it all work in CI I will send v2 to mailing list. > > I tested this with the imx6q_logic board. I only tested the U-Boot > portion, but it appeared to work and it booted the kernel. The U-Boot > size reduced -7182 bytes (about 3% smaller). > > I haven't been able to successfully boot the OMAP3 boards I have yet. > I'm still looking into this. > > I don't think we should enable LTO by default for all boards yet. Adam, did you try the current version from github.com/elkablo/u-boot branch lto ?
