[GHC] #12070: SMP primitives broken on power(pc)

[GHC]

#12070: SMP primitives broken on power(pc)
-------------------------------------+-------------------------------------
        Reporter:  hvr               |                Owner:  trommler
            Type:  bug               |               Status:  patch
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Runtime System    |              Version:  8.0.1-rc4
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  powerpc
 Type of failure:  None/Unknown      |            Test Case:
                                     |  concurrent/prog001/concprog001
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2225
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"563a4857abcee4a6e43c68323274309c58f42aa0/ghc" 563a485/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="563a4857abcee4a6e43c68323274309c58f42aa0"
 PPC: Implement SMP primitives using gcc built-ins

 The SMP primitives were missing appropriate memory barriers
 (sync, isync instructions) on all PowerPCs.

 Use the built-ins _sync_* provided by gcc and clang. This
 reduces code size significantly.

 Remove broken mark for concprog001 on powerpc64. The referenced
 ticket number (11259) was wrong.

 Test Plan: validate on powerpc and ARM

 Reviewers: erikd, austin, simonmar, bgamari, hvr

 Reviewed By: bgamari, hvr

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2225

 GHC Trac Issues: #12070
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12070#comment:6>
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