diff options
Diffstat (limited to 'testsuite/tests/numeric/should_run/arith018.hs')
| -rw-r--r-- | testsuite/tests/numeric/should_run/arith018.hs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/testsuite/tests/numeric/should_run/arith018.hs b/testsuite/tests/numeric/should_run/arith018.hs new file mode 100644 index 0000000000..b73fd5a685 --- /dev/null +++ b/testsuite/tests/numeric/should_run/arith018.hs @@ -0,0 +1,12 @@ +-- exposes a bug in the native code generator in GHC 6.4.1. Division by +-- a power of 2 was being mis-optimsed to a direct shift. + +main = do + print (map f4 [(-20) .. (-1)]) + print (map f8 [(-20) .. (-1)]) + +f4 :: Int -> Int +f4 x = x `quot` 4 + +f8 :: Int -> Int +f8 x = x `quot` 8 |