http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50463
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-09-20 16:57:28 UTC --- This is caused/exposed by revision 165422 Author: rguenth Date: Wed Oct 13 13:03:31 2010 New Revision: 165422 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=165422 Log: 2010-10-13 Richard Guenther <rguent...@suse.de> PR tree-optimization/45970 * tree-ssa-alias.h (stmt_kills_ref_p): Declare. * tree-ssa-alias.c (stmt_kills_ref_p_1): New function. (stmt_kills_ref_p): Likewise. * tree-ssa-dse.c (dse_optimize_stmt): Use it. * gcc.dg/tree-ssa/ssa-dse-13.c: New testcase. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-13.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-alias.c trunk/gcc/tree-ssa-alias.h trunk/gcc/tree-ssa-dse.c If I revert the patch for trunk/gcc/tree-ssa-dse.c in revision 179007, the wrong code is fixed (however gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-13.c fails). I don't know if the cause is in the fortran front-end or in the middle-end, but in my opinion writing such code is asking for trouble;-(
