#6156: Optimiser bug on linux-powerpc
------------------------------------------+---------------------------------
Reporter: erikd | Owner: pcapriotti
Type: bug | Status: new
Priority: normal | Milestone: 7.6.1
Component: Compiler | Version: 7.4.1
Resolution: | Keywords:
Os: Linux | Architecture: powerpc
Failure: Incorrect result at runtime | Difficulty: Unknown
Testcase: | Blockedby:
Blocking: | Related:
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Comment(by erikd):
Have some time to work on this again. The problem revolves around the
following function:
{{{
word64ToWord32 :: Word64 -> Word32
word64ToWord32 (W64# x) = W32# (word64ToWord# x)
}}}
where `word64ToWord#` is defined in `libraries/ghc-prim/GHC/IntWord64.hs`
as:
{{{
foreign import ccall unsafe "hs_word64ToWord" word64ToWord# :: Word64# ->
Word#
}}}
and `hs_word64ToWord` is defined `libraries/ghc-prim/cbits/longlong.c` as:
{{{
HsWord hs_word64ToWord (HsWord64 w) {return (HsWord) w;}
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6156#comment:26>
GHC <http://www.haskell.org/ghc/>
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