[GHC] #15013: Building nofib using llvm and HEAD fails

[GHC]

#15013: Building nofib using llvm and HEAD fails
-------------------------------------+-------------------------------------
           Reporter:  AndreasK       |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.4.2
          Component:  Compiler       |           Version:
  (LLVM)                             |
           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:
-------------------------------------+-------------------------------------
 {{{
 == make all ;
  in /home/Andi/ghc_head/nofib/shootout/pidigits
 ------------------------------------------------------------------------
 HC = /home/Andi/ghc_head/inplace/bin/ghc-stage2
 HC_OPTS = -O2 -Rghc-timing -H32m -hisuf hi -fllvm -rtsopts -O2
 RUNTEST_OPTS = -ghc-timing
 ==nofib== pidigits: time to compile Main follows...
 /home/Andi/ghc_head/inplace/bin/ghc-stage2 -O2 -Rghc-timing -H32m -hisuf
 hi -fllvm -rtsopts -O2 -c Main.hs -o Main.o
 ghc-stage2.exe: panic! (the 'impossible' happened)
   (GHC version 8.5.20180401 for x86_64-unknown-mingw32):
         Each block should be reachable from only one ProcPoint

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

 <<ghc: 506688344 bytes, 156 GCs, 7738569/16639872 avg/max bytes residency
 (5 samples), 37M in use, 0.000 INIT (0.000 elapsed), 0.344 MUT (0.333
 elapsed), 0.062 GC (0.112 elapsed) :ghc>>
 make[1]: *** [../../mk/suffix.mk:23: Main.o] Error 1
 Failed making all in pidigits: 1
 make: *** [../mk/ghc-recurse.mk:69: all] Error 1

 $ opt --version
 LLVM (http://llvm.org/):
   LLVM version 5.0.1
   Optimized build.
   Default target: x86_64-w64-windows-gnu
   Host CPU: skylake

 }}}

 This is on commit 8b823f270e53627ddca1a993c05f1ab556742d96

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15013>
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