[Bug c++/85746] Premature evaluation of __builtin_constant_p?

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85746

Marc Glisse <glisse at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |rsandifo at gcc dot gnu.org

--- Comment #7 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #6)
>              && xi.val[0] <= (HOST_WIDE_INT) ((unsigned HOST_WIDE_INT)
>                                               HOST_WIDE_INT_MAX >> shift))

The issue occurs with xi.val[0] == -9223372036854775808 (lshift_large returns a
result of length 2 for that). I don't know if the code mishandles this case, or
if such a number is not supposed to exist in the first place, but that does
seem like a bug.