diff options
Diffstat (limited to 'testsuite/tests/codeGen/should_compile/cg008.hs')
-rw-r--r-- | testsuite/tests/codeGen/should_compile/cg008.hs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/testsuite/tests/codeGen/should_compile/cg008.hs b/testsuite/tests/codeGen/should_compile/cg008.hs new file mode 100644 index 0000000000..10099c1b48 --- /dev/null +++ b/testsuite/tests/codeGen/should_compile/cg008.hs @@ -0,0 +1,21 @@ +{-# LANGUAGE MagicHash, BangPatterns #-} +{-# OPTIONS_GHC -O0 #-} + +-- Variant of cgrun066; compilation as a module is different. + +module Cg008 (hashStr) where + +import Foreign.C +import Data.Word +import Foreign.Ptr +import GHC.Exts + +import Control.Exception + +hashStr :: Ptr Word8 -> Int -> Int +hashStr (Ptr a#) (I# len#) = loop 0# 0# + where + loop h n | n GHC.Exts.==# len# = I# h + | otherwise = loop h2 (n GHC.Exts.+# 1#) + where !c = ord# (indexCharOffAddr# a# n) + !h2 = (c GHC.Exts.+# (h GHC.Exts.*# 128#)) `remInt#` 4091# |