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This implements support for block group allocations which are aligned to
an integral number of blocks.
This will be used by the nonmoving garbage collector, which uses the
block allocator to allocate the segments which back its heap. These
segments are a fixed number of blocks in size, with each segment being
aligned to the segment size boundary. This allows us to easily find the
segment metadata stored at the beginning of the segment.
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The `nat` type was an alias for `unsigned int` with a comment saying
it was at least 32 bits. We keep the typedef in case client code is
using it but mark it as deprecated.
Test Plan: Validated on Linux, OS X and Windows
Reviewers: simonmar, austin, thomie, hvr, bgamari, hsyl20
Differential Revision: https://phabricator.haskell.org/D2166
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Summary:
The `lnat` type was deprecated in 2012 in commit 41737f12f9 with
a note to use `StgWord` instead.
Test Plan: Validate on Linux and OS X
Reviewers: simonmar, austin, Phyx, hvr, bgamari
Reviewed By: simonmar, Phyx, bgamari
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D2164
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Summary:
My understanding is that ghc 7.10 should be buildable with the last 3 versions
of ghc, i.e 7.6, 7.8 and 7.10 itself.
Test Plan: x
Reviewers: austin
Reviewed By: austin
Subscribers: hvr, simonmar, ezyang, carter, thomie
Differential Revision: https://phabricator.haskell.org/D254
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