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Signed-off-by: Austin Seipp <austin@well-typed.com>
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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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We only use it for "compiler" sources, i.e. not for libraries.
Many modules have a -fno-warn-tabs kludge for now.
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- nativeGen/Instruction defines a type class for a generic
instruction set. Each of the instruction sets we have,
X86, PPC and SPARC are instances of it.
- The register alloctors use this type class when they need
info about a certain register or instruction, such as
regUsage, mkSpillInstr, mkJumpInstr, patchRegs..
- nativeGen/Platform defines some data types enumerating
the architectures and operating systems supported by the
native code generator.
- DynFlags now keeps track of the current build platform, and
the PositionIndependentCode module uses this to decide what
to do instead of relying of #ifdefs.
- It's not totally retargetable yet. Some info info about the
build target is still hardwired, but I've tried to contain
most of it to a single module, TargetRegs.
- Moved the SPILL and RELOAD instructions into LiveInstr.
- Reg and RegClass now have their own modules, and are shared
across all architectures.
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