Another change that's required is (something like) the following. For
ptx, we need to know whether to output something as a .func (callable
from ptx code) or a .kernel (callable from the host). That means we need
to mark the kernel functions somehow in omp-low.c, and the following
does that by way of a new attribute (already recognized by the nvptx
backend).
Bernd
* omp-low.c (create_omp_child_function): Tag entrypoint
functions with a special attribute.
diff --git a/gcc/omp-low.c b/gcc/omp-low.c
index 42ba317..8408025 100644
--- a/gcc/omp-low.c
+++ b/gcc/omp-low.c
@@ -2228,6 +2228,12 @@ create_omp_child_function (omp_context *ctx, bool
task_copy)
break;
}
}
+ if (cgraph_node::get_create (decl)->offloadable
+ && !lookup_attribute ("omp declare target",
+ DECL_ATTRIBUTES (current_function_decl)))
+ DECL_ATTRIBUTES (decl)
+ = tree_cons (get_identifier ("omp target entrypoint"),
+ NULL_TREE, DECL_ATTRIBUTES (decl));
t = build_decl (DECL_SOURCE_LOCATION (decl),
RESULT_DECL, NULL_TREE, void_type_node);
