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This switches the compiler/ component to get compiled with
-XNoImplicitPrelude and a `import GhcPrelude` is inserted in all
modules.
This is motivated by the upcoming "Prelude" re-export of
`Semigroup((<>))` which would cause lots of name clashes in every
modulewhich imports also `Outputable`
Reviewers: austin, goldfire, bgamari, alanz, simonmar
Reviewed By: bgamari
Subscribers: goldfire, rwbarton, thomie, mpickering, bgamari
Differential Revision: https://phabricator.haskell.org/D3989
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Starting with GHC 7.10 and base-4.8, `Monad` implies `Applicative`,
which allows to simplify some definitions to exploit the superclass
relationship. This a first refactoring to that end.
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Since GHC 8.1/8.2 only needs to be bootstrap-able by GHC 7.10 and
GHC 8.0 (and GHC 8.2), we can now finally drop all that pre-AMP
compatibility CPP-mess for good!
Reviewers: austin, goldfire, bgamari
Subscribers: goldfire, thomie, erikd
Differential Revision: https://phabricator.haskell.org/D1724
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This patch refactors pure/(*>) and return/(>>) in MRP-friendly way, i.e.
such that the explicit definitions for `return` and `(>>)` match the
MRP-style default-implementation, i.e.
return = pure
and
(>>) = (*>)
This way, e.g. all `return = pure` definitions can easily be grepped and
removed in GHC 8.1;
Test Plan: Harbormaster
Reviewers: goldfire, alanz, bgamari, quchen, austin
Reviewed By: quchen, austin
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D1312
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Summary:
Introduced in 6c7b41cc2b24f533697a62bf1843507ae043fc97.
I checked the rest of that commit, and this is all that was left to revert.
Test Plan: x
Reviewers: ezyang, austin
Reviewed By: ezyang, austin
Subscribers: simonmar, ezyang, carter, thomie
Differential Revision: https://phabricator.haskell.org/D241
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In some cases, the layout of the LANGUAGE/OPTIONS_GHC lines has been
reorganized, while following the convention, to
- place `{-# LANGUAGE #-}` pragmas at the top of the source file, before
any `{-# OPTIONS_GHC #-}`-lines.
- Moreover, if the list of language extensions fit into a single
`{-# LANGUAGE ... -#}`-line (shorter than 80 characters), keep it on one
line. Otherwise split into `{-# LANGUAGE ... -#}`-lines for each
individual language extension. In both cases, try to keep the
enumeration alphabetically ordered.
(The latter layout is preferable as it's more diff-friendly)
While at it, this also replaces obsolete `{-# OPTIONS ... #-}` pragma
occurences by `{-# OPTIONS_GHC ... #-}` pragmas.
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Work around various problems caused by some of the monadification patches
not being applied.
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Older GHCs can't parse OPTIONS_GHC.
This also changes the URL referenced for the -w options from
WorkingConventions#Warnings to CodingStyle#Warnings for the compiler
modules.
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Refactored linear allocator into separate liveness annotation and allocation stages.
Added graph coloring allocator, use -fregs-graph to enable.
New dump flags are
-ddump-asm-native -- output of cmm -> native transform.
-ddump-asm-liveness -- code annotated with register liveness info
-ddump-asm-coalesce -- output of register move coalescing
(this is a separate pass when using the coloring allocator)
(this could change in the future)
-ddump-asm-regalloc -- code after register allocation
-ddump-asm-regalloc-stages -- blocks after each build/spill stage of coloring allocator
-ddump-asm-conflicts -- a global register liveness graph in graphviz format
The new register allocator will allocate some registers, but it's not
quite ready for prime-time yet. The spill code generator needs some work...
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