[Bug target/113625] Interesting behavior with and without -mcpu=generic

[tnfchris at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113625

Tamar Christina  changed:

   What|Removed |Added

 CC||tnfchris at gcc dot gnu.org

--- Comment #4 from Tamar Christina  ---
Generic is not the default for aarch64 and the default depends on the
architecture revision.

The documentation patch got stuck on bike shedding on the list.

I'll resubmit it tomorrow.

Generic was kept around for backwards compatibility reasons.

That said, both codegen below are suboptimal...

[Bug target/113625] Interesting behavior with and without -mcpu=generic

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113625

--- Comment #3 from Andrew Pinski  ---
I should note that gcc.target/aarch64 tests are explicitly tested with
-mtune=generic ...

[Bug target/113625] Interesting behavior with and without -mcpu=generic

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113625

--- Comment #2 from Andrew Pinski  ---
Just FYI this is how I configured GCC:
```
Configured with: ../configure --target=aarch64-linux-gnu
--prefix=/home/apinski/src/upstream-full-cross/install
--enable-languages=c,c++,fortran,go
--with-sysroot=/home/apinski/src/upstream-full-cross/install//sysroot
```

Nothing special even.

[Bug target/113625] Interesting behavior with and without -mcpu=generic

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113625

--- Comment #1 from Richard Biener  ---
Other targets (x86_64) default to -mtune=generic.  Maybe configure time
selection somehow interferes with this on aarch64?