https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91091
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- Author: rguenth Date: Fri Oct 11 13:10:15 2019 New Revision: 276882 URL: https://gcc.gnu.org/viewcvs?rev=276882&root=gcc&view=rev Log: 2019-10-11 Richard Biener <rguent...@suse.de> PR tree-optimization/90883 PR tree-optimization/91091 * tree-ssa-sccvn.c (vn_reference_lookup_3): Use correct alias-sets both for recording VN table entries and continuing walking after translating through copies. Handle same-sized reads from SSA names by returning the plain SSA name. (eliminate_dom_walker::eliminate_stmt): Properly handle non-size precision stores in redundant store elimination. * gcc.dg/torture/20191011-1.c: New testcase. * gcc.dg/tree-ssa/ssa-fre-82.c: Likewise. * gcc.dg/tree-ssa/ssa-fre-83.c: Likewise. * gcc.dg/tree-ssa/redundant-assign-zero-1.c: Disable FRE. * gcc.dg/tree-ssa/redundant-assign-zero-2.c: Likewise. Added: trunk/gcc/testsuite/gcc.dg/torture/20191011-1.c trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-82.c trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-83.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/gcc.dg/tree-ssa/redundant-assign-zero-1.c trunk/gcc/testsuite/gcc.dg/tree-ssa/redundant-assign-zero-2.c trunk/gcc/tree-ssa-sccvn.c
