This commit changes the prototype of getCopeType, so that it now takes 2
arguments.
1. The llvm::Type returned by the Copy function. This can be any scalar
llvm::Type.
2. The llvm::type of the argument representing the reference to the
value being copied. This should be a pointer-sized integer, where
pointer-sized means with the same size of a pointer in the
architecture in the input binary.
The second argument is not strictly necessary for now, because the whole
decompilation framework expects a binary with a single architecture,
hence a well defined unambiguous pointer size.
This will be used fully only when we start supporting multiple binaries.
Whenever that happens, if we haven't already fully dropped the Copy
helper function we will have to update the associated
OpaqueFunctionsPool to a type pair as key: the return type and the type
of the argument.
Before this commit `StoreInst` weren't supported because they weren't
expected to reach the late stages of the decompilation pipeline where
the `hasSideEffects` helper function is used.
They were expected to be replaced by custom opcodes marked with
`FunctionTags::Assign`.
With the upcoming switch to the new decompilation pipeline, this helper
needs to be able to handle `StoreInst`s, because the custom opcode
functions will be dropped in favor of regular LLVM memory accesses.
Introduce the `ScopeCloser` and `GotoTarget` annotations in the IR, and
the relative necessary machinery, needed to handle scope closer and goto
edges for the new backend.
A specialization of the `llvm::GraphTraits`, called `ScopeGraph`, that
is able to handle both the above mentioned annotations is provided.
For the `llvm::GraphTraits` implementation, we introduce the
`GeneratorIterator` class, which uses a coroutine to store the status of
the iteration.
A debug logger pass is added, so that we are able to test the
functionality with `FileCheck`.
Implement the `zstdCompress` and `zstdDecompress` functions. Also
implement the `ZstdCompressedOstream` which is a `llvm::raw_ostream`
which compresses data on the fly.
Make the cache directory logic uniform in Python and C++, move the
respective implementations under support since it's project-wide logic
and not exclusive to debug-info.
Introduce the `Undirected` GraphTraits, which treats a `MutableEdgeNode`
`GenericGraph` as an undirected graph.
The trait uses the newly introduced `UndirectedChildIterator`, which is
a special custom iterator to get successors and predecessors
concatenated together.
Add some unit tests for `UndirectedChildIterator`.
This commit introduces new tags to specify how LLVMContainer should
deduplicate sets of equivalent functions, typically managed by an
`OpaqueFunctionPool`.
This commit introduces a function to obtain the name assigned to a
`llvm::Function` associated to a `model::Function`. This simplifies the
codebase but also enables us to introduce an option to produce
human-friendly names for debugging/testing purposes.
Before this commit, we used to attach to call site a metadata to trace
back the call site to the CFG (i.e., `FunctionMetadata`).
This led several passes in revng-c to depend on `FunctionMetadata` just
for this.
This commit, attaches to call sites a reference to the prototype itself
(on the `revng.prototype` metadata), breaking many of such dependencies.
Pietro Fezzardi