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[Bug rtl-optimization/51856] [4.7 Regression] ICE in reload_cse_simplify_operands


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51856

--- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> 2012-01-19 14:38:46 UTC ---
Created attachment 26379
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26379
Fix

I've introduced that bug with:
http://gcc.gnu.org/ml/gcc-patches/2011-03/msg01527.html

So it's fair to hit s390 first :(

In find_reloads_subreg_address the -1 value is not properly propagated from
find_reloads_address invocation so find_reloads wrongly assumes that the
address has been fully reloaded into a register.


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