diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/tree-ssa-strlen.c | 7 |
2 files changed, 12 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 741c02d..e79809c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2018-12-28 Martin Sebor <msebor@redhat.com> + + * tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Avoid + undesirable warning. + 2018-12-28 Thomas Schwinge <thomas@codesourcery.com> * omp-expand.c (expand_omp_target): Restructure OpenACC vs. OpenMP diff --git a/gcc/tree-ssa-strlen.c b/gcc/tree-ssa-strlen.c index 669c315..c74ce0f 100644 --- a/gcc/tree-ssa-strlen.c +++ b/gcc/tree-ssa-strlen.c @@ -2114,6 +2114,13 @@ maybe_diag_stxncpy_trunc (gimple_stmt_iterator gsi, tree src, tree cnt) if (wi::to_wide (dstsize) != cntrange[1]) return false; + /* Avoid warning for strncpy(a, b, N) calls where the following + equalities hold: + N == sizeof a && N == sizeof b */ + if (tree srcsize = compute_objsize (src, 1)) + if (wi::to_wide (srcsize) == cntrange[1]) + return false; + if (cntrange[0] == cntrange[1]) return warning_at (callloc, OPT_Wstringop_truncation, "%G%qD specified bound %E equals destination size", |