Faster deadregs

See merge request !25

Add debugging output for palignr operands.

See merge request !24

Convert default arg of SMPFunction::Dump() to explicit arg; add assertions to debug palignr operand issues.

Handle calls to external funcs cleanly; handle corner case of leaf func with pushes but no local frame with access below stack ptr.

Ubuntu22 support

See merge request !23

Fix issue 28 assertion error on indexed EBP-relative operands when testing for accesses above the stack frame.

Merge old SPARK changes into master.

See merge request !21