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that it can be used, without its rules and instances affecting (and being linked from!) the module being compiled.
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I also tidied up the interfaces for LoadIface to be a bit simpler
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linking scenarios. We weren't searching for .a archives to satisfy
-lfoo options on the GHCi command line, for example.
I've tidied up the code in this module so that dealing with -l options
on the command line is consistent with the handling of extra-libraries
for packages.
While I was here I moved some stuff out of Linker.hs that didn't seem
to belong here: dataConInfoPtrToName (now in new module DebuggerUtils)
and lessUnsafeCoerce (now in DynamicLoading, next to its only use)
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This patch was originally developed by Max Bolingbroke, and worked on
further by Austin Seipp. It allows you to write a Core-to-Core pass
and have it dynamically linked into an otherwise-unmodified GHC, and
run at a place you specify in the Core optimisation pipeline.
Main components:
- CoreMonad: new types Plugin, PluginPass
plus a new constructor CoreDoPluginPass in CoreToDo
- SimplCore: stuff to dynamically load any plugins, splice
them into the core-to-core pipeline, and invoke them
- Move "getCoreToDo :: DynFlags -> [CoreToDo]"
which constructs the main core-to-core pipeline
from CoreMonad to SimplCore
SimplCore is the driver for the optimisation pipeline, and it
makes more sense to have the pipeline construction in the driver
not in the infrastructure module.
- New module DynamicLoading: invoked by SimplCore to load any plugins
Some consequential changes in Linker.
- New module GhcPlugins: this should be imported by plugin modules; it
it not used by GHC itself.
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