In this case the STATIC_CAST_EXPR expressions in the call aren't
type nor value dependent, but maybe_constant_value still ICEs on those
when processing_template_decl. Calling fold_non_dependent_expr on it
instead fixes the ICE and folds them to INTEGER_CSTs.
2022-06-17 Jakub Jelinek <jakub@redhat.com>
PR c++/106001
* typeck.cc (build_x_shufflevector): Use fold_non_dependent_expr
instead of maybe_constant_value.
* g++.dg/ext/builtin-shufflevector-4.C: New test.
auto_vec<tree, 16> mask;
for (unsigned i = 2; i < args->length (); ++i)
{
- tree idx = maybe_constant_value ((*args)[i]);
+ tree idx = fold_non_dependent_expr ((*args)[i], complain);
mask.safe_push (idx);
}
tree exp = c_build_shufflevector (loc, arg0, arg1, mask, complain & tf_error);
--- /dev/null
+// PR c++/106001
+// { dg-do compile }
+
+typedef int V __attribute__((vector_size (2 * sizeof (int))));
+
+template <int>
+void
+foo ()
+{
+ V v = {};
+ v = __builtin_shufflevector (v, v, static_cast<char>(1), static_cast<char>(0));
+}
+
+void
+bar ()
+{
+ foo <0> ();
+}