[GHC] #9806: malloc and mallocArray ignore Storable alignment requirements

[GHC]

#9806: malloc and mallocArray ignore Storable alignment requirements
-------------------------------------+-------------------------------------
              Reporter:  ekmett      |            Owner:  ekmett
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Core        |          Version:  7.8.3
  Libraries                          |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:  #8627
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by carter):

 {{{
 [14/11/22-17:13:25]  <edwardk>   the posix_memalign thing is probably the
 right fix
 [14/11/22-17:13:37]  <edwardk>   that'd ensure that malloc aligns to
 whatever boundary the actual storable requires
 [14/11/22-17:13:50]  <edwardk>   so when folks make data types for SIMD
 blocks of floats they work right
 [14/11/22-17:14:30]  <edwardk>   in theory it could affect even old x86
 stuff with the old 10 byte long doubles
 [14/11/22-17:14:35]  <edwardk>   which want a 16 byte alignment
 }}}

 notes by edward for this ticket

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9806#comment:2>
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