https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85620
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by H.J. Lu <h...@gcc.gnu.org>: https://gcc.gnu.org/g:2582080f19e8fe9c1204dfb6fecf744311f00777 commit r13-1717-g2582080f19e8fe9c1204dfb6fecf744311f00777 Author: H.J. Lu <hjl.to...@gmail.com> Date: Thu Jul 14 10:31:21 2022 -0700 x86: Disable sibcall if indirect_return attribute doesn't match When shadow stack is enabled, function with indirect_return attribute may return via indirect jump. In this case, we need to disable sibcall if caller doesn't have indirect_return attribute and indirect branch tracking is enabled since compiler won't generate ENDBR when calling the caller. gcc/ PR target/85620 * config/i386/i386.cc (ix86_function_ok_for_sibcall): Return false if callee has indirect_return attribute and caller doesn't. gcc/testsuite/ PR target/85620 * gcc.target/i386/pr85620-2.c: Updated. * gcc.target/i386/pr85620-5.c: New test. * gcc.target/i386/pr85620-6.c: Likewise. * gcc.target/i386/pr85620-7.c: Likewise.
