[PATCH 0/7] ira/lra: Support subreg coalesce

[Dimitar Dimitrov]

On Fri, Nov 10, 2023 at 04:53:57PM +0800, Lehua Ding wrote:
> > > The divide by zero error above is interesting. I'm not sure why
> > > ira_reg_class_max_nregs[] yields 0 for the pseudo register 168 in
> > > the following rtx:
> > > (debug_insn 168 167 169 19 (var_location:SI encoding (reg/v:SI 168 [
> > > encoding ])) -1
> > >       (nil))
> > 
> > I just cross compiled an arm-none-eabi compiler and didn't encounter
> > this error, can you give me a little more config info about build? For
> > example, flags_for_target, etc. Thanks again.
> > 
> 
> Forgot, please also provide the version information of newlib code.
> 

These are the GIT commit hashes which I tested:
  gcc 39d81b667373b0033f44702a4b532a4618dde9ff
  binutils c96ceed9dce7617f270aa4742645706e535f74b7
  newlib 39f734a857e2692224715b03b99fc7bd83e94a0f

This is the script I'm using to build arm-none-eabi:
   https://github.com/dinuxbg/gnupru/blob/master/testing/manual-build-arm.sh
The build steps and config parameters are easily seen there.

Note that the Linaro CI is also detecting issues. It hits ICEs when
building libgcc:
  https://patchwork.sourceware.org/project/gcc/patch/20231108034740.834590-8-lehua.ding@rivai.ai/

Regards,
Dimitar