[Bug tree-optimization/122533] x86 with -O2 --- uses mov+and instead of test, moves register back and forth, might omit memcpy()

[roger at nextmovesoftware dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122533

Roger Sayle <roger at nextmovesoftware dot com> changed:

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--- Comment #8 from Roger Sayle <roger at nextmovesoftware dot com> ---
Just for completeness, I'll mention that -fdisable-tree-uncprop1 works around
this issue.