[Bug rtl-optimization/53908] [4.6/4.7 Regression] csa removes needed memory load

[hp at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53908

--- Comment #10 from Hans-Peter Nilsson <hp at gcc dot gnu.org> 2012-07-13 
06:53:30 UTC ---
Created attachment 27783
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27783
patch from Richard Sandiford

Updated patch, from http://gcc.gnu.org/ml/gcc-patches/2012-07/msg00463.html
(which wasn't in patch form).