https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763

--- Comment #24 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #22)
> Wonder though if it wouldn't give the RA more choices by also including
> another
> &r <- (r, m) alternative with bmi2 isa attribute.

This would be worse than r <- (0, m) alternative on register starved x86_32
architecture. The above approach can use up to 6 registers, while r <- (0, m)
uses up to 4.

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