diff options
Diffstat (limited to 'gcc/fold-const-call.c')
| -rw-r--r-- | gcc/fold-const-call.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/gcc/fold-const-call.c b/gcc/fold-const-call.c index 439043a..702c8b4 100644 --- a/gcc/fold-const-call.c +++ b/gcc/fold-const-call.c @@ -665,8 +665,17 @@ fold_const_vec_convert (tree ret_type, tree arg) && SCALAR_FLOAT_TYPE_P (TREE_TYPE (ret_type))) code = FLOAT_EXPR; + /* We can't handle steps directly when extending, since the + values need to wrap at the original precision first. */ + bool step_ok_p + = (INTEGRAL_TYPE_P (TREE_TYPE (ret_type)) + && INTEGRAL_TYPE_P (TREE_TYPE (arg_type)) + && (TYPE_PRECISION (TREE_TYPE (ret_type)) + <= TYPE_PRECISION (TREE_TYPE (arg_type)))); tree_vector_builder elts; - elts.new_unary_operation (ret_type, arg, true); + if (!elts.new_unary_operation (ret_type, arg, step_ok_p)) + return NULL_TREE; + unsigned int count = elts.encoded_nelts (); for (unsigned int i = 0; i < count; ++i) { |