[GHC] #15237: New SRT scheme breaks -fvia-C

[GHC]

#15237: New SRT scheme breaks -fvia-C
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4837
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"0238a6c78102d43dae2f56192bd3486e4f9ecf1d/ghc" 0238a6c/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="0238a6c78102d43dae2f56192bd3486e4f9ecf1d"
 UNREG: PprC: add support for of W32 literals

 Today UNREG build fails to generate sub-word literals:
 ```
   rts_dist_HC rts/dist/build/StgStartup.o
 ghc-stage1: panic! (the 'impossible' happened)
   (GHC version 8.5.20180612 for x86_64-unknown-linux):
         pprStatics: cannot emit a non-word-sized static literal
   W32
 ```

 The change allows combining two subwords into one word.

 Signed-off-by: Sergei Trofimovich <slyfox at gentoo.org>

 Reviewers: simonmar, bgamari

 Reviewed By: bgamari

 Subscribers: rwbarton, thomie, carter

 GHC Trac Issues: #15237

 Differential Revision: https://phabricator.haskell.org/D4837
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15237#comment:7>
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