On Thu, 25 Oct 2012, Jan Hubicka wrote: > > > * tree-ssa-loop-ivcanon.c (tree_estimate_loop_size): Add > > > edge_to_cancel > > > parameter and use it to estimate code optimized out in the final > > > iteration. > > > (loop_edge_to_cancel): New function. > > > (try_unroll_loop_completely): New IRRED_IVALIDATED parameter; > > > handle unrolling loops with bounds given via max_loop_iteratins; > > > handle unrolling non-inner loops when code size shrinks; > > > tidy dump output; when the last iteration loop still stays > > > as loop in the CFG forcongly redirect the latch to > > > __builtin_unreachable. > > > (canonicalize_loop_induction_variables): Add irred_invlaidated > > > parameter; record niter bound derrived; dump > > > max_loop_iterations bounds; call try_unroll_loop_completely > > > even if no niter bound is given. > > > (canonicalize_induction_variables): Handle irred_invalidated. > > > (tree_unroll_loops_completely): Handle non-innermost loops; > > > handle irred_invalidated. > > > * cfgloop.h (unlop): Declare. > > > * cfgloopmanip.c (unloop): Export. > > > * tree.c (build_common_builtin_nodes): Build BULTIN_UNREACHABLE. > > > > > > > This caused: > > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55051 > Oops, I did not really anticipated this to happen during profiledbootstrap, > but I > discussed the problem in > http://gcc.gnu.org/ml/gcc-patches/2012-10/msg01103.html > I suppose we will need to find porper fix for this long lasting issue more > urgently now :(
Please try to construct a testcase I can look at. Richard.
