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Other than that:
* Fix T16167,json,json2,T7478,T10637 tests to reflect the introduction of
the `MessageClass` type
* Remove `makeIntoWarning`
* Remove `warningsToMessages`
* Refactor GHC.Tc.Errors
1. Refactors GHC.Tc.Errors so that we use `DiagnosticReason` for "choices"
(defer types errors, holes, etc);
2. We get rid of `reportWarning` and `reportError` in favour of a general
`reportDiagnostic`.
* Introduce `DiagnosticReason`, `Severity` is an enum: This big commit makes
`Severity` a simple enumeration, and introduces the concept of `DiagnosticReason`,
which classifies the /reason/ why we are emitting a particular diagnostic.
It also adds a monomorphic `DiagnosticMessage` type which is used for
generic messages.
* The `Severity` is computed (for now) from the reason, statically.
Later improvement will add a `diagReasonSeverity` function to compute
the `Severity` taking `DynFlags` into account.
* Rename `logWarnings` into `logDiagnostics`
* Add note and expand description of the `mkHoleError` function
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In the future, we want `HscEnv` to support multiple home units
at the same time. This means, that there will be 'Target's that do
not belong to the current 'HomeUnit'.
This is an API change without changing behaviour.
Update haddock submodule to incorporate API changes.
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Before this patch, the only way to override GHC's default logging
behavior was to set `log_action`, `dump_action` and `trace_action`
fields in DynFlags. This patch introduces a new Logger abstraction and
stores it in HscEnv instead.
This is part of #17957 (avoid storing state in DynFlags). DynFlags are
duplicated and updated per-module (because of OPTIONS_GHC pragma), so
we shouldn't store global state in them.
This patch also fixes a race in parallel "--make" mode which updated
the `generatedDumps` IORef concurrently.
Bump haddock submodule
The increase in MultilayerModules is tracked in #19293.
Metric Increase:
MultiLayerModules
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Updates Haddock submodule
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Related to a future change in Data.List,
https://downloads.haskell.org/ghc/8.10.3/docs/html/users_guide/using-warnings.html?highlight=wcompat#ghc-flag--Wcompat-unqualified-imports
Companion pull&merge requests:
- https://github.com/judah/haskeline/pull/153
- https://github.com/haskell/containers/pull/762
- https://gitlab.haskell.org/ghc/packages/hpc/-/merge_requests/9
After these the actual change in Data.List should be easy to do.
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This commit removes the errShortString field from the ErrMsg type,
allowing us to cleanup a lot of dynflag-dependent error functions, and
move them in a more specialised 'GHC.Driver.Errors' closer to the
driver, where they are actually used.
Metric Increase:
T4801
T9961
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mode backpack edges
Backpack instantiations need to be typechecked to make sure that the
arguments fit the parameters. `tcRnInstantiateSignature` checks
instantiations with concrete modules, while `tcRnCheckUnit` checks
instantiations with free holes (signatures in the current modules).
Before this change, it worked that `tcRnInstantiateSignature` was called
after typechecking the argument module, see `HscMain.hsc_typecheck`,
while `tcRnCheckUnit` was called in `unsweep'` where-bound in
`GhcMake.upsweep`. `tcRnCheckUnit` was called once per each
instantiation once all the argument sigs were processed. This was done
with simple "to do" and "already done" accumulators in the fold.
`parUpsweep` did not implement the change.
With this change, `tcRnCheckUnit` instead is associated with its own
node in the `ModuleGraph`. Nodes are now:
```haskell
data ModuleGraphNode
-- | Instantiation nodes track the instantiation of other units
-- (backpack dependencies) with the holes (signatures) of the current package.
= InstantiationNode InstantiatedUnit
-- | There is a module summary node for each module, signature, and boot module being built.
| ModuleNode ExtendedModSummary
```
instead of just `ModSummary`; the `InstantiationNode` case is the
instantiation of a unit to be checked. The dependencies of such nodes
are the same "free holes" as was checked with the accumulator before.
Both versions of upsweep on such a node call `tcRnCheckUnit`.
There previously was an `implicitRequirements` function which would
crawl through every non-current-unit module dep to look for all free
holes (signatures) to add as dependencies in `GHC.Driver.Make`. But this
is no good: we shouldn't be looking for transitive anything when
building the graph: the graph should only have immediate edges and the
scheduler takes care that all transitive requirements are met.
So `GHC.Driver.Make` stopped using `implicitRequirements`, and instead
uses a new `implicitRequirementsShallow`, which just returns the
outermost instantiation node (or module name if the immediate dependency
is itself a signature). The signature dependencies are just treated like
any other imported module, but the module ones then go in a list stored
in the `ModuleNode` next to the `ModSummary` as the "extra backpack
dependencies". When `downsweep` creates the mod summaries, it adds this
information too.
------
There is one code quality, and possible correctness thing left: In
addition to `implicitRequirements` there is `findExtraSigImports`, which
says something like "if you are an instantiation argument (you are
substituted or a signature), you need to import its things too". This
is a little non-local so I am not quite sure how to get rid of it in
`GHC.Driver.Make`, but we probably should eventually.
First though, let's try to make a test case that observes that we don't
do this, lest it actually be unneeded. Until then, I'm happy to leave it
as is.
------
Beside the ability to use `-j`, the other major user-visibile side
effect of this change is that that the --make progress log now includes
"Instantiating" messages for these new nodes. Those also are numbered
like module nodes and count towards the total.
------
Fixes #17188
Updates hackage submomdule
Metric Increase:
T12425
T13035
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The unit database cache, the home unit and the unit state were stored in
DynFlags while they ought to be stored in the compiler session state
(HscEnv). This patch fixes this.
It introduces a new UnitEnv type that should be used in the future to
handle separate unit environments (especially host vs target units).
Related to #17957
Bump haddock submodule
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1) Don't modify DynFlags (too much) for -dynamic-too: now when we
generate dynamic outputs for "-dynamic-too", we only set "dynamicNow"
boolean field in DynFlags instead of modifying several other fields.
These fields now have accessors that take dynamicNow into account.
2) Use DynamicTooState ADT to represent -dynamic-too state. It's much
clearer than the undocumented "DynamicTooConditional" that was used
before.
As a result, we can finally remove the hscs_iface_dflags field in
HscRecomp. There was a comment on this field saying:
"FIXME (osa): I don't understand why this is necessary, but I spent
almost two days trying to figure this out and I couldn't .. perhaps
someone who understands this code better will remove this later."
I don't fully understand the details, but it was needed because of the
changes made to the DynFlags for -dynamic-too.
There is still something very dubious in GHC.Iface.Recomp: we have to
disable the "dynamicNow" flag at some point for some Backpack's "heinous
hack" to continue to work. It may be because interfaces for indefinite
units are always non-dynamic, or because we mix and match dynamic and
non-dynamic interfaces (#9176), or something else, who knows?
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I was working on making DynFlags stateless (#17957), especially by
storing loaded plugins into HscEnv instead of DynFlags. It turned out to
be complicated because HscEnv is in GHC.Driver.Types but LoadedPlugin
isn't: it is in GHC.Driver.Plugins which depends on GHC.Driver.Types. I
didn't feel like introducing yet another hs-boot file to break the loop.
Additionally I remember that while we introduced the module hierarchy
(#13009) we talked about splitting GHC.Driver.Types because it contained
various unrelated types and functions, but we never executed. I didn't
feel like making GHC.Driver.Types bigger with more unrelated Plugins
related types, so finally I bit the bullet and split GHC.Driver.Types.
As a consequence this patch moves a lot of things. I've tried to put
them into appropriate modules but nothing is set in stone.
Several other things moved to avoid loops.
* Removed Binary instances from GHC.Utils.Binary for random compiler
things
* Moved Typeable Binary instances into GHC.Utils.Binary.Typeable: they
import a lot of things that users of GHC.Utils.Binary don't want to
depend on.
* put everything related to Units/Modules under GHC.Unit:
GHC.Unit.Finder, GHC.Unit.Module.{ModGuts,ModIface,Deps,etc.}
* Created several modules under GHC.Types: GHC.Types.Fixity, SourceText,
etc.
* Split GHC.Utils.Error (into GHC.Types.Error)
* Finally removed GHC.Driver.Types
Note that this patch doesn't put loaded plugins into HscEnv. It's left
for another patch.
Bump haddock submodule
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- put panic related functions into GHC.Utils.Panic
- put trace related functions using DynFlags in GHC.Driver.Ppr
One step closer making Outputable fully independent of DynFlags.
Bump haddock submodule
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`DynFlags.buildTag` was a field created from the set of Ways in
`DynFlags.ways`. It had to be kept in sync with `DynFlags.ways` which
was fragile. We want to avoid global state like this (#17957).
Moreover in #14335 we also want to support loading units with different
ways: target units would still use `DynFlags.ways` but plugins would use
`GHC.Driver.Ways.hostFullWays`. To avoid having to deal both with build
tag and with ways, we recompute the buildTag on-the-fly (should be
pretty cheap) and we remove `DynFlags.buildTag` field.
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Preload units can be retrieved in UnitState when needed (i.e. in GHCi)
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We often have (ModuleName, Bool) or (Module, Bool) pairs for "extended"
module names (without or with a unit id) disambiguating boot and normal
modules. We think this is important enough across the compiler that it
deserves a new nominal product type. We do this with synnoyms and a
functor named with a `Gen` prefix, matching other newly created
definitions.
It was also requested that we keep custom `IsBoot` / `NotBoot` sum type.
So we have it too. This means changing many the many bools to use that
instead.
Updates `haddock` submodule.
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Introduce GHC.Unit.* hierarchy for everything concerning units, packages
and modules.
Update Haddock submodule
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Update Haddock submodule
Metric Increase:
haddock.compiler
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* SysTools
* Parser
* GHC.Builtin
* GHC.Iface.Recomp
* Settings
Update Haddock submodule
Metric Decrease:
Naperian
parsing001
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Update Haddock submodule
Metric Increase:
haddock.compiler
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Should make `member` queries faster and avoid messing up with missing
`nubSort`.
Metric Increase:
hie002
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* extract flags and ways into their own modules (with some renaming)
* remove one SOURCE import of GHC.Driver.Session from GHC.Driver.Phases
* when GHC uses dynamic linking (WayDyn), `interpWays` was only
reporting WayDyn even if the host was profiled (WayProf). Now it
returns both as expected (might fix #16803).
* `mkBuildTag :: [Way] -> String` wasn't reporting a canonical tag for
differently ordered lists. Now we sort and nub the list to fix this.
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submodule updates: nofib, haddock
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