Safe transposition of logical and operands

[Andreas Schwab]

On Sep 17 2023, Paul Floyd via Gcc wrote:

> However, Valgrind thinks that these transpositions can't be done when
> there are potentially trapping memory loads like *f.

*f is not doing any pointer dereference.  It just reads the _M_payload
member of f.

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Andreas Schwab, SUSE Labs, schwab@suse.de
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