[Bug target/59573] aarch64: commit 07ca5686e64 broken glibc-2.17

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59573

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Dennis.Yxun from comment #2)
> 1) I still don't get why with this commit, it will lead to generate "cmeq"
> instruction, is this really necessary?

Well the register allocator changed which leads to a different alternative
being selected here so most likely.

> 
> 2) yes, I'd admit that the qemu I built did *not* support cmeq scalar mode,
> but I do have a patch which implemented this insn. and it still result at an
> un-usable system, very weird error.,, also I will ping qemu maintainer for
> suggestion.

Can you try using ARM's foundation model (or another simulator) which should be
easier to compare against?