[GHC] #12207: CgStaticPointers fails with -O

[GHC]

#12207: CgStaticPointers fails with -O
-------------------------------------+-------------------------------------
        Reporter:  thomie            |                Owner:
                                     |  facundo.dominguez
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  8.1
  (CodeGen)                          |             Keywords:
      Resolution:                    |  StaticPointers
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  codeGen/should_run/CgStaticPointers
      Blocked By:                    |             Blocking:
 Related Tickets:  #11656            |  Differential Rev(s):  Phab:D2355
       Wiki Page:                    |  Phab:D2366
-------------------------------------+-------------------------------------

Comment (by Facundo Domínguez <facundo.dominguez@…>):

 In [changeset:"dd92c67be573604290560b93890ce4b8eccd40b3/ghc"
 dd92c67b/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="dd92c67be573604290560b93890ce4b8eccd40b3"
 Stop the simplifier from removing StaticPtr binds.

 Summary:
 We have the FloatOut pass create exported ids for floated StaticPtr
 bindings. The simplifier doesn't try to remove those.

 This patch also improves on 7fc20b by making a common definition
 collectStaticPtrSatArgs to test for StaticPtr binds.

 Fixes #12207.

 Test Plan: ./validate

 Reviewers: simonpj, austin, bgamari, simonmar, goldfire

 Reviewed By: simonpj

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2366

 GHC Trac Issues: #12207
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12207#comment:10>
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