[GHC] #7821: PPC cross-compile impossible happened

[GHC]

#7821: PPC cross-compile impossible happened
--------------------------------+-------------------------------------------
Reporter:  matts                |          Owner:                  
    Type:  bug                  |         Status:  new             
Priority:  normal               |      Component:  Compiler        
 Version:  7.7                  |       Keywords:                  
      Os:  Linux                |   Architecture:  Unknown/Multiple
 Failure:  Building GHC failed  |      Blockedby:                  
Blocking:                       |        Related:                  
--------------------------------+-------------------------------------------
 While trying to build a powerpc targetted GHC cross compiler from current
 GIT head version I saw the impossible happened message below:

 echo 'export LD_LIBRARY_PATH=":$LD_LIBRARY_PATH"' >> inplace/bin/genapply
 echo 'exec "$executablename" ${1+"$@"}'                     >>
 inplace/bin/genapply
 chmod +x
 inplace/bin/genapply
 "inplace/bin/ghc-stage1" -hisuf hi -osuf  o -hcsuf hc -static  -H64m -O0
 -fasm    -package-name
 ghc-prim-0.3.1.0 -hide-all-packages -i -ilibraries/ghc-prim/. -ilibraries
 /ghc-prim/dist-install/
 build -ilibraries/ghc-prim/dist-install/build/autogen -Ilibraries/ghc-prim
 /dist-install/build -I
 libraries/ghc-prim/dist-install/build/autogen -Ilibraries/ghc-prim/.
 -optP-include -optPlibra
 ries/ghc-prim/dist-install/build/autogen/cabal_macros.h -package rts-1.0
 -package-name ghc-prim
 -XHaskell98 -XCPP -XMagicHash -XForeignFunctionInterface
 -XUnliftedFFITypes -XUnboxedTuples -XEm
 ptyDataDecls -XNoImplicitPrelude -O -fasm  -no-user-package-db -rtsopts
 -odir libraries/ghc
 -prim/dist-install/build -hidir libraries/ghc-prim/dist-install/build
 -stubdir libraries/ghc-pri
 m/dist-install/build  -dynamic-too -c libraries/ghc-prim/./GHC/Classes.hs
 -o libraries/ghc-prim/
 dist-install/build/GHC/Classes.o -dyno libraries/ghc-prim/dist-
 install/build/GHC/Classes.dyn_o
 ghc-stage1: panic! (the 'impossible' happened)
   (GHC version 7.7.20130407 for powerpc-e500v2-linux):
         allocateRegsAndSpill: Cannot read from uninitialized register
     %vI_nvZF

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

 make[1]: *** [libraries/ghc-prim/dist-install/build/GHC/Classes.o] Error 1
 make[1]: *** Deleting file `libraries/ghc-prim/dist-
 install/build/GHC/Classes.o'

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7821>
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