[Bug target/58735] X86_64 sign extend on unsigned values

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58735

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
There is nothing wrong about it, just your expectations.
sval << scnt
is due to C/C++ integral promotions performed as ((int) sval) << scnt,
depending on the exact standard for 32-bit int is either undefined behavior or
-1442840576
and that is then extended to 64-bit type.