Re: PATCH: PR rtl-optimization/50696: [x32] Unnecessary lea

[Richard Kenner]

> An and:DI is cheaper than a zero_extend:DI of an and:SI.  

That depends strongly on the constants and whether the machine is 32-bit
or 64-bit. 

But that's irrelevant in this case since the and:SI will be removed (it
reflects what already been done).