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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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This changes the new code generator to make use of the Hoopl package
for dataflow analysis. Hoopl is a new boot package, and is maintained
in a separate upstream git repository (as usual, GHC has its own
lagging darcs mirror in http://darcs.haskell.org/packages/hoopl).
During this merge I squashed recent history into one patch. I tried
to rebase, but the history had some internal conflicts of its own
which made rebase extremely confusing, so I gave up. The history I
squashed was:
- Update new codegen to work with latest Hoopl
- Add some notes on new code gen to cmm-notes
- Enable Hoopl lag package.
- Add SPJ note to cmm-notes
- Improve GC calls on new code generator.
Work in this branch was done by:
- Milan Straka <fox@ucw.cz>
- John Dias <dias@cs.tufts.edu>
- David Terei <davidterei@gmail.com>
Edward Z. Yang <ezyang@mit.edu> merged in further changes from GHC HEAD
and fixed a few bugs.
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The type of the CmmLabel ctor is now
CmmLabel :: PackageId -> FastString -> CmmLabelInfo -> CLabel
- When you construct a CmmLabel you have to explicitly say what
package it is in. Many of these will just use rtsPackageId, but
I've left it this way to remind people not to pretend labels are
in the RTS package when they're not.
- When parsing a Cmm file, labels that are not defined in the
current file are assumed to be in the RTS package.
Labels imported like
import label
are assumed to be in a generic "foreign" package, which is different
from the current one.
Labels imported like
import "package-name" label
are marked as coming from the named package.
This last one is needed for the integer-gmp library as we want to
refer to labels that are not in the same compilation unit, but
are in the same non-rts package.
This should help remove the nasty #ifdef __PIC__ stuff from
integer-gmp/cbits/gmp-wrappers.cmm
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