Hi!
This ICEs because node->alias_target is (not yet) a FUNCTION_DECL, but
IDENTIFIER_NODE.
I guess we should retry the discovery before LTO streaming out, the reason
to do it this early is that it can affect the gimplification and omp lowering.
Bootstrapped/regtested on x86_64-linux and i686-linux, committed to trunk.
2020-10-06 Jakub Jelinek <ja...@redhat.com>
PR middle-end/97289
* omp-offload.c (omp_discover_declare_target_tgt_fn_r): Only follow
node->alias_target if it is a FUNCTION_DECL.
* c-c++-common/gomp/pr97289.c: New test.
--- gcc/omp-offload.c.jj 2020-10-01 10:40:10.000000000 +0200
+++ gcc/omp-offload.c 2020-10-05 11:45:40.450501897 +0200
@@ -203,7 +203,8 @@ omp_discover_declare_target_tgt_fn_r (tr
symtab_node *node = symtab_node::get (*tp);
if (node != NULL)
{
- while (node->alias_target)
+ while (node->alias_target
+ && TREE_CODE (node->alias_target) == FUNCTION_DECL)
{
if (!omp_declare_target_fn_p (node->decl)
&& !lookup_attribute ("omp declare target host",
--- gcc/testsuite/c-c++-common/gomp/pr97289.c.jj 2020-10-05
11:48:58.818623202 +0200
+++ gcc/testsuite/c-c++-common/gomp/pr97289.c 2020-10-05 11:48:38.631916154
+0200
@@ -0,0 +1,14 @@
+/* PR middle-end/97289 */
+/* { dg-do compile } */
+/* { dg-require-weak "" } */
+/* { dg-skip-if "" { "hppa*-*-hpux*" "*-*-aix*" "nvptx-*-*" } } */
+
+void foo (void);
+static void bar (void) __attribute__ ((__weakref__ ("foo")));
+
+void
+baz (void)
+{
+#pragma omp target
+ bar ();
+}
Jakub
