------- Comment #12 from matz at gcc dot gnu dot org 2009-10-26 13:00 ------- Subject: Bug 41783
Author: matz Date: Mon Oct 26 13:00:36 2009 New Revision: 153551 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=153551 Log: PR tree-optimization/41783 * tree-ssa-alias.c (get_continuation_for_phi): Export, add a special case for simple diamonds * tree-ssa-alias.h (get_continuation_for_phi): Declare. * tree-ssa-pre.c (translate_vuse_through_block): Add same_valid argument, use alias oracle to skip some vdefs. (phi_translate_1): Change call to above, don't allocate new value ids if they can stay the same. (compute_avail): Allow vuse walking when looking up references. testsuite/ * gcc.dg/pr41783.c: New test. * gcc.dg/tree-ssa/ssa-pre-23.c: Adjust. * gcc.dg/tree-ssa/ssa-pre-24.c: Don't xfail anymore. * gcc.dg/tree-ssa/ssa-pre-27.c: New test. Added: trunk/gcc/testsuite/gcc.dg/pr41783.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-23.c trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-24.c trunk/gcc/tree-ssa-alias.c trunk/gcc/tree-ssa-alias.h trunk/gcc/tree-ssa-pre.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41783
