https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81384
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- Author: msebor Date: Mon Jun 18 16:32:59 2018 New Revision: 261705 URL: https://gcc.gnu.org/viewcvs?rev=261705&root=gcc&view=rev Log: PR tree-optimization/81384 - built-in form of strnlen missing gcc/ChangeLog: PR tree-optimization/81384 * builtin-types.def (BT_FN_SIZE_CONST_STRING_SIZE): New. * builtins.c (expand_builtin_strnlen): New function. (expand_builtin): Call it. (fold_builtin_n): Avoid setting TREE_NO_WARNING. * builtins.def (BUILT_IN_STRNLEN): New. * calls.c (maybe_warn_nonstring_arg): Handle BUILT_IN_STRNLEN. Warn for bounds in excess of maximum object size. * tree-ssa-strlen.c (maybe_set_strlen_range): Return tree representing single-value ranges. Handle strnlen. (handle_builtin_strlen): Handle strnlen. (strlen_check_and_optimize_stmt): Same. * doc/extend.texi (Other Builtins): Document strnlen. gcc/testsuite/ChangeLog: PR tree-optimization/81384 * gcc.c-torture/execute/builtins/lib/strnlen.c: New test. * gcc.c-torture/execute/builtins/strnlen-lib.c: New test. * gcc.c-torture/execute/builtins/strnlen.c: New test. * gcc.dg/attr-nonstring-2.c: New test. * gcc.dg/attr-nonstring-3.c: New test. * gcc.dg/attr-nonstring-4.c: New test. * gcc.dg/strlenopt-45.c: New test. * gcc.dg/strlenopt.h (strnlen): Declare. Added: trunk/gcc/testsuite/gcc.c-torture/execute/builtins/lib/strnlen.c trunk/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen-lib.c trunk/gcc/testsuite/gcc.c-torture/execute/builtins/strnlen.c trunk/gcc/testsuite/gcc.dg/attr-nonstring-2.c trunk/gcc/testsuite/gcc.dg/attr-nonstring-3.c trunk/gcc/testsuite/gcc.dg/attr-nonstring-4.c trunk/gcc/testsuite/gcc.dg/strlenopt-45.c Modified: trunk/gcc/ChangeLog trunk/gcc/builtin-types.def trunk/gcc/builtins.c trunk/gcc/builtins.def trunk/gcc/calls.c trunk/gcc/doc/extend.texi trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/c-c++-common/attr-nonstring-3.c trunk/gcc/testsuite/gcc.dg/strlenopt.h trunk/gcc/tree-ssa-strlen.c
