One of the two passes to purge unused types from the model had a
ill-defined semantics.
This commit simplifies them in two passes: one that purges all the types
unreachable from outside `Binary::Types` and one that does the same but
also preserves types with a `CustomName` or an `OriginalName`.
This commit switches `model::Type::ID` from being a GUID to be a
progressive number, in order to make things easier for humans.
On top of this, this commit introduces the following changes:
* TypeCopier: import all the necessary PrimitiveTypes and improve
handling of CustomName.
* Move Kind as the last field of the key of each TupleTree type used in
an `UpcastablePointer`.
* Update the ground truth of tests to ignore the `CustomName` in favor
of focusing on `OriginalName`.
* Increase adoption of `model::Binary::makeType`, equivalent to
`Binary.recordNewType(makeType<model::*Type>())`.
Because it's often hard to predict the specific location of an argument when
non-natural alignment is concerned, this adds an extra check allowing
the cases to pass if they would be well-formed if only some pesky
"extra" bytes were to disappear.
Since dwarf sometimes misdetects abi pretty badly, to maintain
the usefulness of the test, it's beneficial to sometimes discard
the "detected" ABI by overriding it by the known value.
This also add a check ensuring that all the functions presents in
the artifact are also present in the binary.
The complicated error handling logic turned out to be more of
a nuisance than a useful debugging tool. This commit removes it
in favour of `revng_abort`'ing or `revng_check`'ing to make sure
the actual state is consistent with the expectations.
It also adds namespace to `std::size_t` mentions.
The architecture-specific pointer (generic register) size is used
instead.
For all the ABIs we support the value of this parameter was already
set to its pointer size. We might need to reintroduce the parameter
in the future if we want to support a super-exotic ABI with different
stack alignment requirements, but that seems highly unlikely.
This also introduces the argument extension helper for one stop all
treating small arguments when they are put into a register or pushed
into the stack.
Ivan Krysak