https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114574
--- Comment #34 from GCC 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:a39983bf58d3097c472252f6989d19b60909dd9a commit r14-10045-ga39983bf58d3097c472252f6989d19b60909dd9a Author: Jakub Jelinek <ja...@redhat.com> Date: Sat Apr 20 00:05:21 2024 +0200 c: Fix ICE with -g and -std=c23 related to incomplete types [PR114361] We did not update TYPE_CANONICAL for incomplete variants when completing a structure. We now set for flag_isoc23 TYPE_STRUCTURAL_EQUALITY_P for incomplete structure and union types and then update TYPE_CANONICAL later, though update it only for the variants and derived pointer types which can be easily discovered. Other derived types created while the type was still incomplete will remain TYPE_STRUCTURAL_EQUALITY_P. See PR114574 for discussion. 2024-04-20 Martin Uecker <uec...@tugraz.at> Jakub Jelinek <ja...@redhat.com> PR lto/114574 PR c/114361 gcc/c/ * c-decl.cc (shadow_tag_warned): For flag_isoc23 and code not ENUMERAL_TYPE use SET_TYPE_STRUCTURAL_EQUALITY. (parser_xref_tag): Likewise. (start_struct): For flag_isoc23 use SET_TYPE_STRUCTURAL_EQUALITY. (c_update_type_canonical): New function. (finish_struct): Put NULL as second == operand rather than first. Assert TYPE_STRUCTURAL_EQUALITY_P. Call c_update_type_canonical. * c-typeck.cc (composite_type_internal): Use SET_TYPE_STRUCTURAL_EQUALITY. Formatting fix. gcc/testsuite/ * gcc.dg/pr114574-1.c: New test. * gcc.dg/pr114574-2.c: New test. * gcc.dg/pr114361.c: New test. * gcc.dg/c23-tag-incomplete-1.c: New test. * gcc.dg/c23-tag-incomplete-2.c: New test.
