[GHC] #12455: Compact Regions

[GHC]

#12455: Compact Regions
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        Reporter:  simonmar          |                Owner:  simonmar
            Type:  task              |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       Component:  Runtime System    |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Marlow <marlowsd@…>):

 In [changeset:"55d535da10dd63bbaf03fb176ced7179087cd0d4/ghc" 55d535d/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="55d535da10dd63bbaf03fb176ced7179087cd0d4"
 Remove CONSTR_STATIC

 Summary:
 We currently have two info tables for a constructor

 * XXX_con_info: the info table for a heap-resident instance of the
   constructor, It has type CONSTR, or one of the specialised types like
   CONSTR_1_0

 * XXX_static_info: the info table for a static instance of this
   constructor, which has type CONSTR_STATIC or CONSTR_STATIC_NOCAF.

 I'm getting rid of the latter, and using the `con_info` info table for
 both static and dynamic constructors.  For rationale and more details
 see Note [static constructors] in SMRep.hs.

 I also removed these macros: `isSTATIC()`, `ip_STATIC()`,
 `closure_STATIC()`, since they relied on the CONSTR/CONSTR_STATIC
 distinction, and anyway HEAP_ALLOCED() does the same job.

 Test Plan: validate

 Reviewers: bgamari, simonpj, austin, gcampax, hvr, niteria, erikd

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2690

 GHC Trac Issues: #12455
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12455#comment:2>
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