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This merge does not turn on the new codegen (which only compiles
a select few programs at this point),
but it does introduce some changes to the old code generator.
The high bits:
1. The Rep Swamp patch is finally here.
The highlight is that the representation of types at the
machine level has changed.
Consequently, this patch contains updates across several back ends.
2. The new Stg -> Cmm path is here, although it appears to have a
fair number of bugs lurking.
3. Many improvements along the CmmCPSZ path, including:
o stack layout
o some code for infotables, half of which is right and half wrong
o proc-point splitting
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C-- no longer has 'hints'; to guide parameter passing, it
has 'kinds'. Renamed type constructor, data constructor, and record
fields accordingly
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Nothing too deep here; primarily tinking with prettyprinting
and names. Also eliminated some warnings. This patch covers
most (but not all) of the code NR changed at the very end
of September 2007, just before ICFP hit...
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This allows the instance of UserOfLocalRegs to be within Haskell98, and IMHO
makes the code a little cleaner generally.
This is one small (though tedious) step towards making GHC's code more
portable...
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Fixes building with -Werror (i.e. validate) and GHC < 6.6
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I've renamed a number of type and data constructors within Cmm so that
the names used in the compiler may more closely reflect the C--
specification 2.1. I've done a bit of other renaming as well.
Highlights:
CmmFormal and CmmActual now bear a CmmKind (which for now is a
MachHint as before)
CmmFormals = [CmmFormal] and CmmActuals = [CmmActual]
suitable changes have been made to both code and nonterminals in the
Cmm parser (which is as yet untested)
For reasons I don't understand, parts of the code generator use a
sequence of 'formal parameters' with no C-- kinds. For these we now
have the types
type CmmFormalWithoutKind = LocalReg
type CmmFormalsWithoutKinds = [CmmFormalWithoutKind]
A great many appearances of (Tau, MachHint) have been simplified to
the appropriate CmmFormal or CmmActual, though I'm sure there are
more opportunities.
Kind and its data constructors are now renamed to
data GCKind = GCKindPtr | GCKindNonPtr
to avoid confusion with the Kind used in the type checker and with CmmKind.
Finally, in a somewhat unrelated bit (and in honor of Simon PJ, who
thought of the name), the Whalley/Davidson 'transaction limit' is now
called 'OptimizationFuel' with the net effect that there are no longer
two unrelated uses of the abbreviation 'tx'.
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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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This patch is a start on removing import lists and generally tidying
up the top of each module. In addition to removing import lists:
- Change DATA.IOREF -> Data.IORef etc.
- Change List -> Data.List etc.
- Remove $Id$
- Update copyrights
- Re-order imports to put non-GHC imports last
- Remove some unused and duplicate imports
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Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.
The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level. The build system now makes no
pretense at being multi-project, it is just the GHC build system.
No doubt this will break many things, and there will be a period of
instability while we fix the dependencies. A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.
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