[GHC] #14573: runtimeRepPrimRep panic when building GHC 8.2.2 with -fprof-auto-exported

[GHC]

#14573: runtimeRepPrimRep panic when building GHC 8.2.2 with -fprof-auto-exported
-------------------------------------+-------------------------------------
           Reporter:  luite          |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.2.2
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 When building GHC 8.2.2 with the following options in `build.mk`, the
 stage1 compiler panics when building `StgCmmMonad.p_o`

 {{{
 SRC_HC_OPTS        = -O -H64m
 GhcStage1HcOpts    = -O
 GhcStage2HcOpts    = -O2 -fprof-auto-exported
 GhcLibHcOpts          = -O2 -fprof-auto-exported
 BUILD_PROF_LIBS    = YES
 }}}


 {{{
 ghc-stage1: panic! (the 'impossible' happened)
   (GHC version 8.2.2 for x86_64-unknown-linux):
         runtimeRepPrimRep
   typePrimRep (a_12 :: TYPE k0_10)
   k0_10
   Call stack:
       CallStack (from HasCallStack):
         prettyCurrentCallStack, called at
 compiler/utils/Outputable.hs:1133:58 in ghc:Outputable
         callStackDoc, called at compiler/utils/Outputable.hs:1137:37 in
 ghc:Outputable
         pprPanic, called at compiler/simplStg/RepType.hs:360:5 in
 ghc:RepType

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
 }}}

 (tested on x86_64 linux with GHC 8.0.2 as bootstrap compiler)

 The GHC 8.4 branch doesn't appear to do this, but I'm not sure if the
 underlying problem has been fixed.

 Compiling only the `StgCmmMonad` module with `-fprof-auto-exported` does
 not trigger the panic

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14573>
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