patch applied (ghc): NCG: Add sanity checking to linear allocator

[Ben Lippmeier]

Thu Sep 17 02:03:35 PDT 2009  Ben.Lippmeier at anu.edu.au
  * NCG: Add sanity checking to linear allocator
  If there are are unreachable basic blocks in the native code then the 
  linear allocator might loop. Detect this case and panic instead.

    M ./compiler/nativeGen/RegAlloc/Linear/Main.hs -7 +17

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20090917090335-43c66-ae46903d8e64cca7bcd59aaf5e3bdc24f0b80ea9.gz