[GHC] #16172: GHC 8.4 build failure on ARM

[GHC]

#16172: GHC 8.4 build failure on ARM
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           Reporter:  dustin    |             Owner:  (none)
               Type:  bug       |            Status:  new
           Priority:  normal    |         Milestone:
          Component:  Compiler  |           Version:  8.4.4
           Keywords:            |  Operating System:  Linux
       Architecture:  arm       |   Type of failure:  Building GHC failed
          Test Case:            |        Blocked By:
           Blocking:            |   Related Tickets:
Differential Rev(s):            |         Wiki Page:
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 Using the same environment I used to build 8.6 and got the following
 error:

 {{{
 ghc-stage1: panic! (the 'impossible' happened)
   (GHC version 8.4.4.20181014 for arm-unknown-linux):
         padLiveArgs -- i > regNum ??
 CallStack (from HasCallStack):
   error, called at compiler/llvmGen/LlvmCodeGen/Base.hs:194:27 in
 ghc:LlvmCodeGen.Base

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

 rts/ghc.mk:295: recipe for target 'rts/dist/build/HeapStackCheck.o' failed
 make[1]: *** [rts/dist/build/HeapStackCheck.o] Error 1
 make[1]: *** Waiting for unfinished jobs....
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16172>
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