https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71947
--- Comment #12 from Jeffrey A. Law <law at gcc dot gnu.org> --- Author: law Date: Mon Oct 10 20:40:59 2016 New Revision: 240947 URL: https://gcc.gnu.org/viewcvs?rev=240947&root=gcc&view=rev Log: PR tree-optimization/71947 * tree-ssa-dom.c (cprop_into_stmt): Avoid replacing A with B, then B with A within a single statement. PR tree-optimization/71947 * gcc.dg/tree-ssa/pr71947-1.c: New test. * gcc.dg/tree-ssa/pr71947-2.c: New test. * gcc.dg/tree-ssa/pr71947-3.c: New test. * gcc.dg/tree-ssa/pr71947-4.c: New test. * gcc.dg/tree-ssa/pr71947-5.c: New test. * gcc.dg/tree-ssa/pr71947-6.c: New test. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/pr71947-1.c trunk/gcc/testsuite/gcc.dg/tree-ssa/pr71947-2.c trunk/gcc/testsuite/gcc.dg/tree-ssa/pr71947-3.c trunk/gcc/testsuite/gcc.dg/tree-ssa/pr71947-4.c trunk/gcc/testsuite/gcc.dg/tree-ssa/pr71947-5.c trunk/gcc/testsuite/gcc.dg/tree-ssa/pr71947-6.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-dom.c