agx: Fixes (and small opts) in prep for register spilling
Big pile of bug fixes (and a small optimization pass) I wrote while bringing up register spilling support in the compiler. These can go in first since most of them are valuable on their own.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Big pile of bug fixes (and a small optimization pass) I wrote while bringing up register spilling support in the compiler. These can go in first since most of them are valuable on their own.