http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55079
--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> 2012-11-02 16:35:01 UTC --- Author: hubicka Date: Fri Nov 2 16:34:52 2012 New Revision: 193098 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193098 Log: PR middle-end/55079 * tree-ssa-loop-niter.c (number_of_iterations_exit): Update MAX field if NITER was folded to contant. (record_estimate): Sanity check. * tree-ssa-loop-ivcanon.c (remove_exits_and_undefined_stmts): New function. (remove_redundant_iv_test): New function. (loops_to_unloop, loops_to_unloop_nunroll): New static vars. (unloop_loops): Break out from ... (try_unroll_loop_completely): ... here; Pass in MAXITER; use remove_exits_and_undefined_stmts; do not unloop. (canonicalize_loop_induction_variables): Compute MAXITER; use remove_redundant_iv_test; remove loop_close_ssa_invalidated and irred_invalidated arguments. (canonicalize_induction_variables): Compute fresh bound estimates; unloop; walk from innermost. (tree_unroll_loops_completely): Likewise. * gcc.dg/tree-ssa/cunroll-10.c: New testcase. * gcc.dg/tree-ssa/cunroll-9.c: New testcase. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/cunroll-10.c trunk/gcc/testsuite/gcc.dg/tree-ssa/cunroll-9.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-loop-ivcanon.c trunk/gcc/tree-ssa-loop-niter.c
