https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118342
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, there is also the
"On some older processors, use of a 32-bit operand size may clear the upper 32
bits of a 64-bit destination while leaving the lower 32 bits unmodified."
footnote in the Intel manual. So we can use it for 64 value or perhaps others
which have the upper 32 bits clear, but not say for -1.
