https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112559
Bug ID: 112559 Summary: The -fno-builtin option affects the instruction generation of the program Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: mumuxi_ll at outlook dot com Target Milestone: --- Created attachment 56600 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56600&action=edit C source code Upon compiling a function, it was observed that adding the -fno-builtin option resulted in the compilation of line 2795, where the set_head_size function in the mEMALIGn function occurs. Without the -fno-builtin option, the set_head_size does not appear in the assembly code. Does the gcc behavior change when processing -fno-builtin?