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Use DiagOpts for diagnostic options instead of directly querying
DynFlags (#17957).
Surprising performance improvements on CI:
T4801(normal) ghc/alloc 313236344.0 306515216.0 -2.1% GOOD
T9961(normal) ghc/alloc 384502736.0 380584384.0 -1.0% GOOD
ManyAlternatives(normal) ghc/alloc 797356128.0 786644928.0 -1.3%
ManyConstructors(normal) ghc/alloc 4389732432.0 4317740880.0 -1.6%
T783(normal) ghc/alloc 408142680.0 402812176.0 -1.3%
Metric Decrease:
T4801
T9961
T783
ManyAlternatives
ManyConstructors
Bump haddock submodule
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This is an attempt at reducing the number of dependencies of the Parser
(as reported by CountParserDeps). Modules in GHC.Parser.* don't import
GHC.Driver.Session directly anymore.
Sadly some GHC.Driver.* modules are still transitively imported and the
number of dependencies didn't decrease. But it's a step in the right
direction.
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Introduce LogFlags as a independent subset of DynFlags used for logging.
As a consequence in many places we don't have to pass both Logger and
DynFlags anymore.
The main reason for this refactoring is that I want to refactor the
systools interfaces: for now many systools functions use DynFlags both
to use the Logger and to fetch their parameters (e.g. ldInputs for the
linker). I'm interested in refactoring the way they fetch their
parameters (i.e. use dedicated XxxOpts data types instead of DynFlags)
for #19877. But if I did this refactoring before refactoring the Logger,
we would have duplicate parameters (e.g. ldInputs from DynFlags and
linkerInputs from LinkerOpts). Hence this patch first.
Some flags don't really belong to LogFlags because they are subsystem
specific (e.g. most DumpFlags). For example -ddump-asm should better be
passed in NCGConfig somehow. This patch doesn't fix this tight coupling:
the dump flags are part of the UI but they are passed all the way down
for example to infer the file name for the dumps.
Because LogFlags are a subset of the DynFlags, we must update the former
when the latter changes (not so often). As a consequence we now use
accessors to read/write DynFlags in HscEnv instead of using `hsc_dflags`
directly.
In the process I've also made some subsystems less dependent on DynFlags:
- CmmToAsm: by passing some missing flags via NCGConfig (see new fields
in GHC.CmmToAsm.Config)
- Core.Opt.*:
- by passing -dinline-check value into UnfoldingOpts
- by fixing some Core passes interfaces (e.g. CallArity, FloatIn)
that took DynFlags argument for no good reason.
- as a side-effect GHC.Core.Opt.Pipeline.doCorePass is much less
convoluted.
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