This isn't quite a 100% clean sweep of IWYU.
There are some false positives where clang fails.
Additionally there are still a few missed in the frontend side of things
that I didn't get to
Instead of having the configuration being loaded and stored in to a
frontend system. First moves the backing store of the configuration in
to FEXCore.
Each layer that is constructed then loads its particular configuration.
After the layers are loaded, then a meta layer is constructed that
merges the layers flat.
This means we will no longer hit the problem where a configuration is
stored in the "main" configuration file, then environment and arguments
passed manage to overwrite it.
The order of the layers going from inner most layer to outer most, with
outermost overwriting previous layer configurations is as follows:
Main < Global application < Local application < Arguments < Environment
One step that needs to be changed in the future is that FEXCore can then
just load its configuration from the layers directly since the data is
in FEXCore now. This will be reserved for a future change so we are less
disruptive.
This dumps the IR before and after optimizations
--dump-ir can be
"no" -> Do not dump
"stderr" -> Dump to stderr
"stdout" -> Dump to stdout
"some/path" -> Dump to "some/path/$GuestRip-pre.ir" and "some/path/$GuestRip-post.ir"
This is just a virtual number that the guest can query through the
various means. Will affect mesa with how many helper threads it
generates at the very least
Ryan Houdek