[GHC] #13900: Core lint in BuildFlavour=perf-llvm

[GHC]

#13900: Core lint in BuildFlavour=perf-llvm
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  bgamari
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by dfeuer):

 Actually, the `GHC.getModuleGraph` is ''not'' necessary. I can replace
 that line by

 {{{#!hs
 _graph <- return ()
 }}}

 but ''not'' by

 {{{#!hs
 return ()
 }}}

 That's subtle....

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13900#comment:11>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler