Add a mixin class for piperuns that work on an LLVM module and need
both the model function and the `llvm::Function`. Pipe that inherit this
mixin will receive both the model and LLVM function in the
`runOnLLVMFunction` method.
Change the `Register.*Pipe` functions to end in `Run` if the template
argument should be a pipe run. Also change the concepts `Is.*Pipe` to
also have the `Run` suffix if applicable.
Make the interface required by `SingleOutputPipe` similar to other
piperuns by requiring a constructor, the use of `PipeRunArgument`s and
the implementation of a non-static `run` function.
Contains APIs from upstream LLVM that are not yet present in the current
version, as well as helpers not present in upstream.
See upstream commit 42c31d8302ff8f716601df9c276a5cd9ace6b158.
The `Head` election now works in a bottom-up fashion (child regions are
processed before the parent ones), and ensures that the `Head` election
process is coherent across multiple nested regions.
This means that:
1) The late entries are coherent between the nested regions. If a node
is selected as a late entry for a region, the parent region must
follow this decision too.
2) If a node which is a `Head` candidate for a parent region, is
selected as the `Head` for a child region, the same choice must be
performed for the parent region too.
Before this commit the port number was incorrectly increased when there
were no arguments in a function type, causing edges to be routed in a
less accurate way.
This commit fixes the problem.
This uses the "rank=source" feature of graphviz, that allows to select
what are the nodes with mimimal rank in a graph.
We use this to mark all the nodes that represent functions and segments
so that the graph layout is more deterministic and readable across
multiple runs when the input Model is very similar.
Giacomo Vercesi