GitLab

I'd been meaning to do this for some time, but finally got around to it
due to the overflowing literals warning. With that enabled, we were
getting a warning for
    -128 :: Int8
as that is parsed as
    negate (fromInteger 128)
which just happens to do the right thing, as
    negate (fromInteger 128) = negate (-128) = -128

This patch adds rules for converting floating point multiplication
of the form 2.0 * x and x * 2.0 into addition x + x.

It thought that .cmm files were Haskellish, but then didn't know
how to compile them. Now they aren't treated as Haskellish, and
it can compile and link them.

Makes it look less likely that people will confuse what it is for
(e.g. #8104).

This means that ghc-tarballs is only needed on Windows

We need to desugar the code, or we don't get the warnings from the
desugarer.

No functional changes

Signed-off-by: Austin Seipp <aseipp@pobox.com>

We weren't properly tracking the number of stack arguments in the
continuation of a foreign call.  It happened to work when the
continuation was not a join point, but when it was a join point we
were using the wrong amount of stack fixup.

I think the alternative layout rule flags are deliberately not
documented at the moment.

The readMVar implementation had only partially implemented
a micro-optimization which allows us to avoid adding an MVar
to the mutable list if the MVar was not changed.  However,
this was not applied to the release method on the fast path,
resulting in dirty MVars which were not added to the mutable list.
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>

  * Exposes bSwap{,16,32,64}# primops
  * Add a new machop: MO_BSwap
  * Use a Stg implementation (hs_bswap{16,32,64}) for other implementation
    in NCG.
  * Generate bswap in X86 NCG for 32 and 64 bits, and for 16 bits, bswap+shr
    instead of using xchg.
  * Generate llvm.bswap intrinsics in llvm codegen.
Authored-by: Vincent Hanquez <tab@snarc.org>
Signed-off-by: Austin Seipp <aseipp@pobox.com>

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>

This reverts commit 163de258 and commit 279ac9f6.