https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115744
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #58563|0 |1 is obsolete| | Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 58580 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58580&action=edit gcc15-pr115744.patch With the PR115754 change in, this seems mostly about the FTMs and making placement new constexpr. The only thing that doesn't work is the new (p + 1) int[]{2, 3}; // error (in this paper) case from the paper xfailed in the last testcase, the IL has there <<< Unknown tree: expr_stmt (void) (TARGET_EXPR <D.2640, (void *) TARGET_EXPR <D.2641, VIEW_CONVERT_EXPR<int *>(b) + 4>>, TARGET_EXPR <D.2642, operator new [] (8, NON_LVALUE_EXPR <D.2640>)>, int * D.2643; <<< Unknown tree: expr_stmt (void) (D.2643 = (int *) D.2642) >>>; and so there is nothing that would trigger some error during constexpr evaluation. Shouldn't build_new_1 for maybe_constexpr_fn (current_function_decl) in the array_p case add some extra cast to the array type it is looking for rather than just the ultimate element type?