[GHC] #14226: Common Block Elimination pass doesn't eliminate common blocks

[GHC]

#14226: Common Block Elimination pass doesn't eliminate common blocks
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.2.1
  (CodeGen)                          |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #9157             |  Differential Rev(s):  Phab:D3973,
       Wiki Page:                    |  Phab:D3999
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"9aa73892e10e90a1799b9277da593e816a827364/ghc"
 9aa73892/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="9aa73892e10e90a1799b9277da593e816a827364"
 cmm/CBE: Use foldLocalRegsDefd

 Simonpj suggested this as a follow-on to #14226 to avoid code
 duplication. This also gives us the ability to CBE cases involving
 foreign calls for free.

 Test Plan: Validate

 Reviewers: austin, simonmar, simonpj

 Reviewed By: simonpj

 Subscribers: michalt, simonpj, rwbarton, thomie

 GHC Trac Issues: #14226

 Differential Revision: https://phabricator.haskell.org/D3999
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14226#comment:13>
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