diff options
Diffstat (limited to 'gcc/cp/constexpr.c')
| -rw-r--r-- | gcc/cp/constexpr.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c index a6ac3c1468d..8213ef29bc8 100644 --- a/gcc/cp/constexpr.c +++ b/gcc/cp/constexpr.c @@ -3239,6 +3239,11 @@ cxx_eval_store_expression (const constexpr_ctx *ctx, tree t, tree fields = TYPE_FIELDS (DECL_CONTEXT (index)); unsigned HOST_WIDE_INT idx; + if (code == UNION_TYPE && CONSTRUCTOR_NELTS (*valp) + && CONSTRUCTOR_ELT (*valp, 0)->index != index) + /* Changing active member. */ + vec_safe_truncate (CONSTRUCTOR_ELTS (*valp), 0); + for (idx = 0; vec_safe_iterate (CONSTRUCTOR_ELTS (*valp), idx, &cep); idx++, fields = DECL_CHAIN (fields)) |