[Bug tree-optimization/102448] [12 Regression] wrong codegen in gcc in spec2017 since 24f99147b9264f8f7d9cfb2fa6bd431edfa252d2

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102448

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Tamar Christina from comment #2)
> I have double checked the revision and it does start happening with it.
> 
> Though I can only reproduce it with -flto.  the codegen without lto seems
> the same.
> 
> Any ideas how to debug further?

Since you identified the offending assembler see what's the corresponding
source portion - there look at the .optimized gimple dumps and see when the bad
code was introduced.  I'll see if the issue reproduces on x86_64.

What options are you using for aarch64 besides -flto and which -march?