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| author | Martin Sebor <msebor@redhat.com> | 2018-12-28 19:26:14 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2018-12-28 12:26:14 -0700 |
| commit | 3a03bffd4873ae4efa21c360cc6d147fee7365a7 (patch) | |
| tree | 7e048a29f41d9d0f464248573f97e149b4fea3b7 | |
| parent | 766d4a59256eba5112d1d46e41565157c0edef67 (diff) | |
| download | gcc-3a03bffd4873ae4efa21c360cc6d147fee7365a7.zip gcc-3a03bffd4873ae4efa21c360cc6d147fee7365a7.tar.gz gcc-3a03bffd4873ae4efa21c360cc6d147fee7365a7.tar.bz2 | |
tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Avoid undesirable warning.
* tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Avoid
undesirable warning.
From-SVN: r267454
| -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", |