https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101597
--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:ef9462581076218d2370fabb09c39d2c83814b9a commit r12-6487-gef9462581076218d2370fabb09c39d2c83814b9a Author: Jakub Jelinek <ja...@redhat.com> Date: Tue Jan 11 19:21:30 2022 +0100 c++: Fix ICEs with OBJ_TYPE_REF pretty printing [PR101597] The following testcase ICEs, because middle-end uses the C++ FE pretty printing code through langhooks in the diagnostics. The FE expects OBJ_TYPE_REF_OBJECT's type to be useful (pointer to the class type it is called on), but in the middle-end conversions between pointer types are useless, so the actual type can be some random unrelated pointer type (in the testcase void * pointer). The pretty printing code then ICEs on it. The following patch fixes that by sticking the original OBJ_TYPE_REF_OBJECT's also as type of OBJ_TYPE_REF_TOKEN operand. That one must be an INTEGER_CST, all the current uses of OBJ_TYPE_REF_TOKEN just use tree_to_uhwi or tree_to_shwi on it, and because it is constant, there is no risk of the middle-end propagating into it some other pointer type. So, approach similar to how MEM_REF treats its second operand or a couple of internal functions (e.g. IFN_VA_ARG) some of its parameters. 2022-01-11 Jakub Jelinek <ja...@redhat.com> PR c++/101597 gcc/ * tree.def (OBJ_TYPE_REF): Document type of OBJ_TYPE_REF_TOKEN. gcc/cp/ * class.c (build_vfn_ref): Build OBJ_TYPE_REF with INTEGER_CST OBJ_TYPE_REF_TOKEN with type equal to OBJ_TYPE_REF_OBJECT type. * error.c (resolve_virtual_fun_from_obj_type_ref): Use type of OBJ_TYPE_REF_TOKEN rather than type of OBJ_TYPE_REF_OBJECT as obj_type. gcc/objc/ * objc-act.c (objc_rewrite_function_call): Build OBJ_TYPE_REF with INTEGER_CST OBJ_TYPE_REF_TOKEN with type equal to OBJ_TYPE_REF_OBJECT type. * objc-next-runtime-abi-01.c (build_objc_method_call): Likewise. * objc-gnu-runtime-abi-01.c (build_objc_method_call): Likewise. * objc-next-runtime-abi-02.c (build_v2_objc_method_fixup_call, build_v2_build_objc_method_call): Likewise. gcc/testsuite/ * g++.dg/opt/pr101597.C: New test.
