https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79777
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Author: rguenth Date: Thu Mar 2 07:53:42 2017 New Revision: 245830 URL: https://gcc.gnu.org/viewcvs?rev=245830&root=gcc&view=rev Log: 2017-03-02 Richard Biener <rguent...@suse.de> PR tree-optimization/79777 * tree-ssa-pre.c (eliminate_insert): Give up if we simplify the to insert expression to sth existing. * gcc.dg/torture/pr79777.c: New testcase. Added: trunk/gcc/testsuite/gcc.dg/torture/pr79777.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-pre.c