On 6/17/22 03:28, Jakub Jelinek wrote:
Hi!
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.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
OK.
2022-06-17 Jakub Jelinek <ja...@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.
--- gcc/cp/typeck.cc.jj 2022-06-04 10:34:26.261505682 +0200
+++ gcc/cp/typeck.cc 2022-06-16 19:38:04.397979247 +0200
@@ -6344,7 +6344,7 @@ build_x_shufflevector (location_t loc, v
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);
--- gcc/testsuite/g++.dg/ext/builtin-shufflevector-4.C.jj 2022-06-16
19:43:13.103935249 +0200
+++ gcc/testsuite/g++.dg/ext/builtin-shufflevector-4.C 2022-06-16
19:42:37.534401207 +0200
@@ -0,0 +1,18 @@
+// 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> ();
+}
Jakub
