[Bug target/64941] -O3 breaks tar

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64941

Mikael Pettersson <mikpelinux at gmail dot com> changed:

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--- Comment #4 from Mikael Pettersson <mikpelinux at gmail dot com> ---
I can't reproduce on Ivy Bridge, but the OP's machine is Haswell so
-march=native -mtune=native may cause different behaviour there.  Could someone
try this on Haswell?