FunctionMetadata was being deserialized every time they were
inspected. This commit introduces a cache structure to prevent this
excessive deserializations.
EarlyFunctionAnalysis now can be invoked to schedule a full
ABI analysis over the collected functions via `--detect-abi`
option, or it can limit itself to simply recover the CFG and
serialize it onto the LLVM IR via `--collect-cfg` option.
The control-flow graph and all its hierarchy components
have been moved from `model` to `efa`. The CFG is now
serialized onto the LLVM IR module as a metadata.
The collection of the function entry-points has now been separated
from EarlyFunctionAnalysis into two distinct passes: the first one,
which collects functions which are in call-sites of a direct call,
and the second one which collects code pointers in `.rodata` (e.g.,
function pointers, vtables; jump-tables are possibly skipped).
This is a big step to split revng-lift in two parts: one that only
writes the model and one that actually lifts to LLVM IR.
* Introduce `revng import binary`
* Split off `BinaryFile.h`
* Drop `revng.h`
* `GeneratedCodeBasicInfo`: use model
* Reduce role of `GeneratedCodeBasicInfo` in favor of
`model::Architecture` and `model::Register` methods
* `CodeGenerator`: adopt `RawBinaryView` and model
* `JumpTargetManager`: adopt `RawBinaryView` and model
* `ExternalJumpsHandler`: adopt model
* `InstructionTranslator`: discard `Architecture` in favor of
`EndianessMismatch`
* Many other changes
Model classes are now described by a YAML document, which is used to
generate C++ headers containing classes and all the boilerplate
required for YAML serialization/deserialization, usage in
SortedVectors, etc. See the README in include/revng/Model for more
info.
Massimo Fioravanti