https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108522
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Siddhesh Poyarekar <siddh...@gcc.gnu.org>: https://gcc.gnu.org/g:4526562a305b3bfc18485a2aa017500aa22aa14b commit r12-9112-g4526562a305b3bfc18485a2aa017500aa22aa14b Author: Siddhesh Poyarekar <siddh...@gotplt.org> Date: Tue Jan 24 19:47:05 2023 -0500 tree-optimization/108522 Use COMPONENT_REF offset when available Use the offset in TREE_OPERAND(component_ref, 2) when available instead of DECL_FIELD_OFFSET when trying to compute offset for a COMPONENT_REF. Co-authored-by: Jakub Jelinek <ja...@redhat.com> gcc/ChangeLog: PR tree-optimization/108522 * tree-object-size.cc (compute_object_offset): Use TREE_OPERAND(ref, 2) for COMPONENT_REF when available. gcc/testsuite/ChangeLog: PR tree-optimization/108522 * gcc.dg/builtin-dynamic-object-size-0.c (test_dynarray_struct_member): New test. (main): Call it. Signed-off-by: Siddhesh Poyarekar <siddh...@gotplt.org> (cherry picked from commit b851ee9fdf0f3023635f0cb1f7c607b2d6801053)