https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101515
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:f70464efbfa9469c57ac75b9aa5a62a2cff4f1fe commit r11-9732-gf70464efbfa9469c57ac75b9aa5a62a2cff4f1fe Author: Jakub Jelinek <ja...@redhat.com> Date: Sat Mar 19 08:40:47 2022 +0100 c-family: Fix up ICE during pretty-printing of PMF related expression [PR101515] The intent of r11-6729 is that it prints something that helps user to figure out what exactly is being accessed. When we find a unique non-static data member that is being accessed, even when we can't fold it nicely, IMNSHO it is better to print ((sometype *)&var)->field or (*(sometype *)&var).field instead of *(fieldtype *)((char *)&var + 56) because the user doesn't know what is at offset 56, we shouldn't ask user to decipher structure layout etc. One question is if we could return something better for the TYPE_PTRMEMFUNC_FLAG RECORD_TYPE members here (something that would print it more naturally/readably in a C++ way), though the fact that the routine is in c-family makes it harder. Another one is whether we shouldn't punt for FIELD_DECLs that don't have nicely printable name of its containing scope, something like: if (tree scope = get_containing_scope (field)) if (TYPE_P (scope) && TYPE_NAME (scope) == NULL_TREE) break; return cop; or so. This patch implements that. Note the returned cop is a COMPONENT_REF where the first argument has a nicely printable type name (x with type sp), but sp's TYPE_MAIN_VARIANT is the unnamed TYPE_PTRMEMFUNC_FLAG. So another possibility would be if we see such a problem for the FIELD_DECL's scope, check if TYPE_MAIN_VARIANT of the first COMPONENT_REF's argument is equal to that scope and in that case use TREE_TYPE of the first COMPONENT_REF's argument as the scope instead. 2022-03-19 Jakub Jelinek <ja...@redhat.com> PR c++/101515 * c-pretty-print.c (c_fold_indirect_ref_for_warn): For C++ don't return COMPONENT_REFs with FIELD_DECLs whose containing scope can't be printed. * g++.dg/warn/pr101515.C: New test. (cherry picked from commit 2663d18356b0a62f5a800c7e5596d814cd3c2c41)
