diff options
| author | David Feuer <David.Feuer@gmail.com> | 2014-11-13 21:12:05 +0100 |
|---|---|---|
| committer | Herbert Valerio Riedel <hvr@gnu.org> | 2014-11-13 21:15:33 +0100 |
| commit | 603b7be7bd3abaf0e2c210e8d9015b1d613b4715 (patch) | |
| tree | 2a2256421922ff4ed3b93205f7c2c30cd04d32e1 /testsuite | |
| parent | 638991114f9358ee78f32d5d5c98bb3001b52ec9 (diff) | |
| download | haskell-603b7be7bd3abaf0e2c210e8d9015b1d613b4715.tar.gz | |
Implement amap/coerce for Array (re #9796)
Implement an `amap`/`coerce` rule in `GHC.Arr` to match the
`map`/`coerce` rule in GHC.Base.
In order to do so, delay inlining `amap` until phase 1.
To prevent the inlining delay from causing major inefficiencies due to
missed list fusion, rewrite `amap` to avoid relying on list fusion. This
has the extra benefit of reducing the size of the compiled amap code by
skipping the impossible case of an array with a negative size.
Reviewed By: nomeata
Differential Revision: https://phabricator.haskell.org/D471
Diffstat (limited to 'testsuite')
| -rw-r--r-- | testsuite/tests/simplCore/should_run/AmapCoerce.hs | 25 | ||||
| -rw-r--r-- | testsuite/tests/simplCore/should_run/AmapCoerce.stdout | 3 | ||||
| -rw-r--r-- | testsuite/tests/simplCore/should_run/all.T | 1 |
3 files changed, 29 insertions, 0 deletions
diff --git a/testsuite/tests/simplCore/should_run/AmapCoerce.hs b/testsuite/tests/simplCore/should_run/AmapCoerce.hs new file mode 100644 index 0000000000..01a9a5d5c6 --- /dev/null +++ b/testsuite/tests/simplCore/should_run/AmapCoerce.hs @@ -0,0 +1,25 @@ +{-# LANGUAGE MagicHash #-} + +import GHC.Exts +import Unsafe.Coerce +import Data.Array + +newtype Age = Age Int + +fooAge :: Array Int Int -> Array Int Age +fooAge = fmap Age +fooCoerce :: Array Int Int -> Array Int Age +fooCoerce = fmap coerce +fooUnsafeCoerce :: Array Int Int -> Array Int Age +fooUnsafeCoerce = fmap unsafeCoerce + +same :: a -> b -> IO () +same x y = case reallyUnsafePtrEquality# (unsafeCoerce x) y of + 1# -> putStrLn "yes" + _ -> putStrLn "no" + +main = do + let l = listArray (1,3) [1,2,3] + same (fooAge l) l + same (fooCoerce l) l + same (fooUnsafeCoerce l) l diff --git a/testsuite/tests/simplCore/should_run/AmapCoerce.stdout b/testsuite/tests/simplCore/should_run/AmapCoerce.stdout new file mode 100644 index 0000000000..55f7ebb441 --- /dev/null +++ b/testsuite/tests/simplCore/should_run/AmapCoerce.stdout @@ -0,0 +1,3 @@ +yes +yes +yes diff --git a/testsuite/tests/simplCore/should_run/all.T b/testsuite/tests/simplCore/should_run/all.T index 93dc4c66f9..364dfd694f 100644 --- a/testsuite/tests/simplCore/should_run/all.T +++ b/testsuite/tests/simplCore/should_run/all.T @@ -53,6 +53,7 @@ test('T5441', extra_clean(['T5441a.o','T5441a.hi']), multimod_compile_and_run, ['T5441','']) test('T5603', normal, compile_and_run, ['']) test('T2110', normal, compile_and_run, ['']) +test('AmapCoerce', normal, compile_and_run, ['']) # Run these tests *without* optimisation too test('T5625', [ only_ways(['normal','optasm']), exit_code(1) ], compile_and_run, ['']) |