Summary:
The LBR only has information about taken branches and does not record
information when a branch is not taken. In our CFG, we call these edges
"fall-through" edges. This patch teaches llvm-flo how to infer fall-through
edge frequencies.
(cherry picked from FBD2536633)
Summary:
Changes DataReader to organize branch perf data per function name and
sets up logistics to bring this data to BinaryFunction::buildCFG(). To do this,
we expand BinaryContext with a const reference to DataReader. This patch also
adds the "-dump-functions" flag to force llvm-flo to dump the current state of
BinaryFunctions once they are disassembled and their CFG built, allowing us to
test whether the builder is sane with LLVM LIT tests.
(cherry picked from FBD2534675)
Summary:
This patch introduces DataReader, a module responsible for
parsing llvm flo data files into in-memory data structures.
(cherry picked from FBD2515754)
