#7446: GHC -O0 goes into a loop
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Reporter: EyalLotem | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.6.1 | Keywords:
Os: Linux | Architecture: x86
Failure: None/Unknown | Blockedby:
Blocking: | Related:
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Comment(by int-e):
Note that the second example,
{{{
data V = V {-# UNPACK #-} !L
data L = L V
}}}
produces an "unusable UNPACK pragma" warning (but not always, see #7447)
if compiled with -O1 or -O2. This also seems wrong -- I would expect the
compiler to unpack it into something isomorphic to {{{data V = V V}}}.
P.S. reproduced on x86_64.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7446#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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