https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112845
--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:87d013f7c877f944adbbaa4e94244baf990cb9f2 commit r12-10054-g87d013f7c877f944adbbaa4e94244baf990cb9f2 Author: Jakub Jelinek <ja...@redhat.com> Date: Tue Dec 5 13:17:57 2023 +0100 i386: Fix -fcf-protection -Os ICE due to movabsq peephole2 [PR112845] The following testcase ICEs in the movabsq $(i32 << shift), r64 peephole2 I've added a while back to use smaller code than movabsq if possible. If i32 is 0xfa1e0ff3 and shift is not divisible by 8, then it creates an invalid insn (as 0xfa1e0ff3 CONST_INT is not allowed as x86_64_immediate_operand nor x86_64_zext_immediate_operand), the peephole2 even triggers on it again and again (this time with shift 0) until it gives up. The following patch fixes that. As ix86_endbr_immediate_operand needs a CONST_INT and it is hopefully rare, I chose to use FAIL rather than handling it in the condition (where I'd probably need to call ctz_hwi again etc.). 2023-12-05 Jakub Jelinek <ja...@redhat.com> PR target/112845 * config/i386/i386.md (movabsq $(i32 << shift), r64 peephole2): FAIL if the new immediate is ix86_endbr_immediate_operand. (cherry picked from commit e0786ca9a18c50ad08c40936b228e325193664b8)
