* This avoids the need to call printAsOperand that requires use of an
ostream and thus avoids a str copy.
* ModuleSlotTracker is used to get a BB # for BB's without names when
dumping SuspendCrossingInfo and materialization info.
* getBasicBlockLabel() is changed to dumpBasicBlockLabel() that directly
prints the label to dbgs()
* The label corresponds with the print-before BB #s.
* This change does not require any additional arguments to be added to
dump() methods, at least those that currently do not require any args.
Co-authored-by: tnowicki <tnowicki.nowicki@amd.com>