[MLton] different word sizes

Henry Cejtin henry@sourcelight.com
Fri, 23 Apr 2004 15:17:48 -0500


I  know that in the various manuals describing code optimization for `modern'
x86 CPUs they warn you that because of register renaming, it is a bad idea to
do  things  like load into an 8-bit register and then use the 32-bit register
which it is part of  as  an  operand.   The  point  is  that  underneath  the
renaming, those are different places.

I don't know if that is relevant to what you have in mind.