[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 #3 from PeteVine <tulipawn at gmail dot com> ---
Curiously, up to gcc 6, targeting Cortex-A5 made virtually no difference, but
in gcc 7, generic codegen takes an 8% hit while -mcpu=cortex-a5 produces
roughly the same performance as before. (but that's a different issue so FWIW)