https://sourceware.org/bugzilla/show_bug.cgi?id=22871
--- Comment #10 from Linus Torvalds <torva...@linux-foundation.org> ---
(In reply to H.J. Lu from comment #7)
>
> Good point. I will remove "testq $imm31, mem". I will add
> "test{q,l,w} $imm8,%r{64,32,16}" to "testb $imm8,%r8" to -O3.
I'm assuming that you limit the immediate to just 7 bits for the testb case.
But I think you can do the register versions at -O2. Unlike the memory ops,
there are no faulting behaviors there.
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