libgccjit fails on startup on aarch64 (and probably other archs).
The issues are that
(a) within jit_langhook_init the call to
targetm.init_builtins can use types that aren't representable
via jit::recording::type, and
(b) targetm.init_builtins can call lang_hooks.decls.pushdecl, which
although a no-op for libgccjit has a gcc_unreachable.
Fixed thusly.
Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu.
Pushed to trunk as r15-7126-g27470f9a818538.
gcc/jit/ChangeLog:
* dummy-frontend.cc (tree_type_to_jit_type): For POINTER_TYPE,
bail out if the inner call to tree_type_to_jit_type fails.
Don't abort on unknown types.
(jit_langhook_pushdecl): Replace gcc_unreachable with return of
NULL_TREE.
Signed-off-by: David Malcolm <dmalc...@redhat.com>
---
gcc/jit/dummy-frontend.cc | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/gcc/jit/dummy-frontend.cc b/gcc/jit/dummy-frontend.cc
index 574851696311..1d0080d6fecb 100644
--- a/gcc/jit/dummy-frontend.cc
+++ b/gcc/jit/dummy-frontend.cc
@@ -1278,6 +1278,8 @@ recording::type* tree_type_to_jit_type (tree type)
{
tree inner_type = TREE_TYPE (type);
recording::type* element_type = tree_type_to_jit_type (inner_type);
+ if (!element_type)
+ return nullptr;
return element_type->get_pointer ();
}
else
@@ -1299,10 +1301,6 @@ recording::type* tree_type_to_jit_type (tree type)
}
}
}
-
- fprintf (stderr, "Unknown type:\n");
- debug_tree (type);
- abort ();
}
return NULL;
@@ -1372,7 +1370,7 @@ jit_langhook_global_bindings_p (void)
static tree
jit_langhook_pushdecl (tree decl ATTRIBUTE_UNUSED)
{
- gcc_unreachable ();
+ return NULL_TREE;
}
static tree
--
2.26.3
