https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122867
--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-14 branch has been updated by Richard Earnshaw <[email protected]>: https://gcc.gnu.org/g:5de80e305c82dc113b24de152671bf3b572a9f7c commit r14-12179-g5de80e305c82dc113b24de152671bf3b572a9f7c Author: Richard Earnshaw <[email protected]> Date: Tue Nov 25 15:47:05 2025 +0000 arm: handle long-range CBZ/CBNZ patterns [PR122867] The CBN?Z instructions have a very small range (just 128 bytes forwards). The compiler knows how to handle cases where we exceed that, but only if the range remains within that which a condition branch can support. When compiling some machine generated code it is not too difficult to exceed this limit, so arrange to fall back to a conditional branch over an unconditional one in this extreme case. gcc/ChangeLog: PR target/122867 * config/arm/arm.cc (arm_print_operand): Use %- to emit LOCAL_LABEL_PREFIX. (arm_print_operand_punct_valid_p): Allow %- for punct and make %_ valid for all compilation variants. * config/arm/thumb2.md (*thumb2_cbz): Handle very large branch ranges that exceed the limit of b<cond>. (*thumb2_cbnz): Likewise. gcc/testsuite/ChangeLog: PR target/122867 * gcc.target/arm/cbz-range.c: New test. (cherry picked from commit e97550a7d0e1a8b31a76b0877c0e90a0163da7ee)
