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Diffstat (limited to 'gcc/c/c-decl.c')
| -rw-r--r-- | gcc/c/c-decl.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c index cdd10ab..b50f2bf 100644 --- a/gcc/c/c-decl.c +++ b/gcc/c/c-decl.c @@ -11061,12 +11061,15 @@ struct c_declspecs * declspecs_add_alignas (location_t loc, struct c_declspecs *specs, tree align) { - int align_log; specs->alignas_p = true; specs->locations[cdw_alignas] = loc; if (align == error_mark_node) return specs; - align_log = check_user_alignment (align, false, true); + + /* Only accept the alignment if it's valid and greater than + the current one. Zero is invalid but by C11 required to + be silently ignored. */ + int align_log = check_user_alignment (align, false, /* warn_zero = */false); if (align_log > specs->align_log) specs->align_log = align_log; return specs; |