On Tue, Dec 19, 2017 at 4:15 PM, Bin Cheng <bin.ch...@arm.com> wrote: > Hi, > This patch backports revision 254777 and 254778 to GCC 7 branch. > Bootstrap and test on x86_64. Is it OK?
Ok. Richard. > Thanks, > bin > > 2017-12-18 Bin Cheng <bin.ch...@arm.com> > > Backport from mainline > 2017-11-15 Bin Cheng <bin.ch...@arm.com> > > PR tree-optimization/82726 > PR tree-optimization/70754 > * tree-predcom.c (order_drefs_by_pos): New function. > (combine_chains): Move code setting has_max_use_after to... > (try_combine_chains): ...here. New parameter. Sort combined chains > according to position information. > (tree_predictive_commoning_loop): Update call to above function. > (update_pos_for_combined_chains, pcom_stmt_dominates_stmt_p): New. > > 2017-11-15 Bin Cheng <bin.ch...@arm.com> > > > PR tree-optimization/82726 > Revert > 2017-01-23 Bin Cheng <bin.ch...@arm.com> > > PR tree-optimization/70754 > * tree-predcom.c (stmt_combining_refs): New parameter INSERT_BEFORE. > (reassociate_to_the_same_stmt): New parameter INSERT_BEFORE. Insert > combined stmt before it if not NULL. > (combine_chains): Process refs reversely and compute dominance point > for root ref. > > Revert > 2017-02-23 Bin Cheng <bin.ch...@arm.com> > > PR tree-optimization/79663 > * tree-predcom.c (combine_chains): Process refs in reverse order > only for ZERO length chains, and add explaining comment. > > gcc/testsuite > 2017-12-18 Bin Cheng <bin.ch...@arm.com> > > Backport from mainline > 2017-11-15 Bin Cheng <bin.ch...@arm.com> > > PR tree-optimization/82726 > * gcc.dg/tree-ssa/pr82726.c: New test.
