NFC. This just makes sure every file is formatted following the
formatting definition in .clang-format.
Re-formatted with:
$ clang-format -i $(find source tools include -name '*.cpp')
$ clang-format -i $(find source tools include -name '*.h')
This is experimental, and has not tests.
It's been used to debug validation of structured control flow.
- Has a legend describing special arcs to merge blocks and continue
targets.
- Labels the function entry block, with the Id of the function.
