Commits since last release

Check upstream for the full history.

• Don't emit byte op-code annotations in LIMPLE to optimize for compile-time commit
• Memoize `comp-subtype-p' commit
• Constrain only mvars that are actually used commit
• Use `comp-assign-op-p' into dead code elimination pass commit
• Fix logic for constraining block with multiple predecessors commit
• Symplify (not t) => nil and (not nil) => t commit
• Extend cstrs pass to match `unless' like code commit
• Extend cstrs pass to match `when' like code commit
• Invert basic block argument order in LIMPLE cond-jump commit