PR tree-optimization/85700 - Spurious -Wstringop-truncation warning with strncat
gcc/ChangeLog:
PR tree-optimization/85700
* gimple-fold.c (gimple_fold_builtin_strncat): Adjust comment.
* tree-ssa-strlen.c (is_strlen_related_p): Handle integer subtraction.
(maybe_diag_stxncpy_trunc): Distinguish strncat from strncpy.
gcc/testsuite/ChangeLog:
PR tree-optimization/85700
* gcc.dg/Wstringop-truncation-4.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@262110 138bc75d-0d04-0410-961f-82ee72b054a4