Re: [GHC] #5889: -fno-prof-count-entries leads to linking errors

12 Jan 2018

      #5889: -fno-prof-count-entries leads to linking errors
-------------------------------------+-------------------------------------
        Reporter:  akio              |                Owner:  bgamari
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  GHC rejects       |            Test Case:
  valid program                      |  profiling/should_compile/T5889
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by osa1):

 I wonder if this could be related with inlining worker for `split`. This
 program

 {{{
 import A

 {-# NOINLINE b #-}
 b :: Integer
 b = bar 100 Nothing
 }}}

 compiles to

 {{{
 ds_r4vL :: (Integer, Integer)
 [GblId]
 ds_r4vL
   = scc<bar>
     scc
     case B.$wsplit n_r4u9 (GHC.Base.Nothing @ Integer) of
     { (# ww1_s2sg, ww2_s2sh #) ->
     (ww1_s2sg, ww2_s2sh)
     }

 b [InlPrag=NOINLINE] :: Integer
 [GblId]
 b = scc<bar>
     plus_noinline
       (scc case ds_r4vL of { (y_a2pz, z_a2pB) -> y_a2pz })
       (scc case ds_r4vL of { (y_a2pz, z_a2pB) -> z_a2pB })
 }}}

 and fails the same way.

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/5889#comment:21
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