The goal is to support a jumptable testcase that is not supported by
the current jump bounds check. The jump bounds check needs to be
augmented so that it understands equality relationships between stack
values and registers, and bounds on both.
This patch tracks when a register points to a concrete stack offset.
As part of this, we droped the AbsDomain instance for AbsBlockState.
Clients should now likely use `fnStartAbsBlockState` in lieu of `top`.
The other client visible change is that the ClassifyFailure
constructor now has an extra argument with details about why
classification failure occured.
We were hitting a translation error for imul in another application - this test
case is a reduced example demonstrating the problem.
The root cause was that there were a few missing cases for the new signed
immediate values from flexdis; this caused a fallthrough that mis-identified
signed immediates as non-immediates, triggering an error.
Previously, we asked macaw to discover three functions in the tail-call
test. One of those only ever appeared as a tail call from another
function; currently macaw isn't smart enough to discover that as its own
function (and that's probably okay for now).
