------- Comment #24 from jakub at gcc dot gnu dot org 2010-06-30 15:34 ------- Subject: Bug 43866
Author: jakub Date: Wed Jun 30 15:34:09 2010 New Revision: 161609 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161609 Log: Backport from mainline 2010-06-25 Jakub Jelinek <ja...@redhat.com> PR middle-end/43866 * tree-ssa-loop-unswitch.c (tree_may_unswitch_on): If stmt is always true or always false, return NULL_TREE. (tree_unswitch_single_loop): Optimize conditions even when reaching max-unswitch-level parameter. If num > 0, optimize first all conditions using entry checks, then do still reachable block discovery and consider only conditions in still reachable basic blocks in the loop. * gfortran.dg/pr43866.f90: New test. Added: branches/gcc-4_5-branch/gcc/testsuite/gfortran.dg/pr43866.f90 - copied unchanged from r161375, trunk/gcc/testsuite/gfortran.dg/pr43866.f90 Modified: branches/gcc-4_5-branch/gcc/ChangeLog branches/gcc-4_5-branch/gcc/testsuite/ChangeLog branches/gcc-4_5-branch/gcc/tree-ssa-loop-unswitch.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43866
