https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88775
--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Tue Jan 15 08:11:00 2019 New Revision: 267931 URL: https://gcc.gnu.org/viewcvs?rev=267931&root=gcc&view=rev Log: PR tree-optimization/88775 * match.pd (cmp (convert1?@2 addr@0) (convert2? addr@1)): Optimize equal == 0 equality pointer comparisons some more if compared in integral types and either one points to an automatic var and the other to a global, or we can prove at least one points to the middle or both point to start or both point to end. * gcc.dg/tree-ssa/pr88775-1.c: New test. * gcc.dg/tree-ssa/pr88775-2.c: New test. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/pr88775-1.c trunk/gcc/testsuite/gcc.dg/tree-ssa/pr88775-2.c Modified: trunk/gcc/ChangeLog trunk/gcc/match.pd trunk/gcc/testsuite/ChangeLog
