panic : Register allocator: out of stack slots (need 147)

Build current GHC HEAD on linux-powerpc.

Usign the stage1 to build compiler/main/DynFlags.hs -o compiler/stage2/build/DynFlags.o I get:

ghc-stage1: panic! (the 'impossible' happened)
  (GHC version 7.7.20121212 for powerpc-unknown-linux):
        Register allocator: out of stack slots (need 147)
   If you are trying to compile SHA1.hs from the crypto library then this
   is a known limitation in the linear allocator.

   Try enabling the graph colouring allocator with -fregs-graph instead.
   You can still file a bug report if you like.

Trac metadata

Trac field	Value
Version	7.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Linux
Architecture