[Bug rtl-optimization/68282] Optimization fails to remove unnecessary sign extension instruction

[stanshebs at earthlink dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68282

--- Comment #3 from Stan Shebs <stanshebs at earthlink dot net> ---
Sorry, left out a detail - the cltq output is compilation as C++.  Compiled as
a C file, the code does have the andl as noted.  (I'm sure there are good
reasons why the *exact* *same* source text ends up with two completely
different asm sequences, ahem.)