https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91222
--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
This patch fixes the ICE
Index: ipa-devirt.c
===================================================================
--- ipa-devirt.c (revision 273865)
+++ ipa-devirt.c (working copy)
@@ -1003,7 +1003,7 @@ warn_types_mismatch (tree t1, tree t2, l
n2 = DECL_NAME (n2);
/* Most of the time, the type names will match, do not be unnecesarily
verbose. */
- if (IDENTIFIER_POINTER (n1) != IDENTIFIER_POINTER (n2))
+ if (n1 != n2)
inform (loc_t1,
"type %qT defined in anonymous namespace cannot match "
"type %qT across the translation unit boundary",
however the warnings output are:
2.ii:62:3: warning: ‘ml_bssnrest_’ violates the C++ One Definition Rule [-Wodr]
62 | } ml_bssnrest_;
| ^
1.ii:2:8: note: type ‘struct <anon>’ defined in anonymous namespace cannot
match across the translation unit boundary
2 | struct {
| ^
2.ii:2:15: note: the incompatible type defined in another translation unit
2 | extern struct {
| ^
1.ii:62:3: note: ‘ml_bssnrest_’ was previously declared here
62 | } ml_bssnrest_;
| ^
Now I wonder why C++ FE makes the struct anonymous namespace when it is
declared with extern "C".
I have checked that type_in_anonymous_namespace_p(prevailing_type) returns true
because mangled name is <anon> which comes from C++ FE.
I will check in the patch to avoid ICE. Jason, can you please look if it is
correct to consider these types anonymous?
