such as that of coerce.

just like boxed type equalities.

we want a rule "map coerce = coerce" to match the core generated for
"map Age" (this is #2110).

Some nice improvements on already succeeding test cases (#876, #7954
and #4267)

Test #149 needed a little change, lest call arity causes a allocation
change that we do not want to test here.

This also sets precedence for testing internals of GHC directly, i.e.
without trying to come up with Haskell code and observable effects.
Let's see how that goes.

I put all the tests (including those where the analysis could do better)
in one file because starting the GHC API is quite slow.

This analysis finds out if a let-bound expression with lower manifest
arity than type arity is always called with more arguments, as in that
case eta-expansion is allowed and often viable. The analysis is very
much tailored towards the code generated when foldl is implemented via
foldr; without this analysis doing so would be a very bad idea!

There are other ways to improve foldr/builder-fusion to cope with foldl,
if any of these are implemented then this step can probably be moved to
-O2 to save some compilation times. The current impact of adding this
phase is just below +2% (measured running GHC's "make").

yoeight authored Jan 11, 2014 and eir@cis.upenn.edu committed Feb 09, 2014

Signed-off-by: Richard Eisenberg <eir@cis.upenn.edu>

yoeight authored Jan 11, 2014 and eir@cis.upenn.edu committed Feb 09, 2014

Signed-off-by: Richard Eisenberg <eir@cis.upenn.edu>

We should still have pattern synonyms in TH, though.

These files are created during `./configure` and therefore
by convention are expected to be removed by `make distclean`.

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

This was causing `utils/ghctags/dist-install` to not get removed
on `make clean` as `Stage1Only` was unset. So testing for `!= YES` is
less fragile than testing for `== NO` in this case.

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

This also fixes the internal crash when using pattern synonyms
in GHCi (#8749)

This patch allows turning on ImpredicativeTypes while type-checking
the code generated by GeneralizedNewtypeDeriving. It does this
by adding a field ib_extensions to InstBindings, informing the
type-checker what extensions should be enabled while type-checking
the instance.

the ConTag may be out of range (e.g. if the type constructor is imported
via SOURCE and we don't know any of its data constructors); just return
Nothing without complaining in that case. This fixes #8743.

which only occurs when the instance being compiled is also present from
a .hs-boot file.

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

Following 298a25bd

 and #8722 as Peter mentioned, this probably isn't
needed anymore.

Signed-off-by: Austin Seipp <austin@well-typed.com>

Signed-off-by: Austin Seipp <austin@well-typed.com>

Suggested by Gabor Greif on ghc-devs

Previously, the `http://`-protocol part was hardcoded in the URLs, causing
the initial clone process to fall back to `http://` even when the ghc.git repo
was cloned via one of the other 3 supported transport protocols.

This is slightly related to #8545, as it will make it possible to e.g.

    git clone --recursive git://git.haskell.org/ghc



and clone ghc.git including all submodules in one go (i.e. w/o `sync-all`),
and w/o falling back to a different (hardwired) Git transport protocol for
the submodules.

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

Our old function for searching for sections could only deal
with section names that were eight bytes or shorter; this
patch adds support for long section names.

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

type holes -> typed holes, reorder, minor changes

Signed-off-by: Austin Seipp <austin@well-typed.com>

End of Cmm pipeline used to be split into two alternative flows,
depending on whether we did proc-point splitting or not. There
was a lot of code duplication between these two branches. But it
wasn't really necessary as the differences can be easily enclosed
within an if-then-else. I observed no impact of this change on
compilation performance.

This tests various properties expected to hold for
quotRem, divMod, div, mod, quot, and rem.

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>