[Bug target/71615] wrong float point result with {-Ofast, -march=native, and valgrind}

[wangmianzhi1 at linuxmail dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71615

--- Comment #3 from Mianzhi Wang <wangmianzhi1 at linuxmail dot org> ---
The bug disappears on an i7 3700k with the identical OS, GCC, and valgrind.
Should be something related to the AMD CPU.