[Bug target/53659] ARM: Using -mcpu=cortex-a9 option results in bad performance for Cortex-A9 processor in C-Ray phoronix benchmark

[tulipawn at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53659

--- Comment #4 from PeteVine <tulipawn at gmail dot com> ---
I've just done the obvious and run the resulting ARMv7 binaries on a Cortex A53
 in aarch32 mode and the difference is there (GCC 6.2.1 and 7.0.0) so I can
confirm the issue is present to this day.

Cortex-A5 vs Cortex-A9 codegen yields a 0.81x performance ratio.