https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113636
--- Comment #11 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Richard Sandiford <rsand...@gcc.gnu.org>: https://gcc.gnu.org/g:aeec7d87a28ac80c64ebfa88cef3dccee3ba8efc commit r14-8518-gaeec7d87a28ac80c64ebfa88cef3dccee3ba8efc Author: Richard Sandiford <richard.sandif...@arm.com> Date: Tue Jan 30 09:30:35 2024 +0000 aarch64: Handle debug references to removed registers [PR113636] In this PR, we entered early-ra with quite a bit of dead code. The code was duly removed (to avoid wasting registers), but there was a dangling reference in debug instructions, which caused an ICE later. Fixed by resetting a debug instruction if it references a register that is no longer needed by non-debug instructions. gcc/ PR target/113636 * config/aarch64/aarch64-early-ra.cc (early_ra::replace_regs): Take the containing insn as an extra parameter. Reset debug instructions if they reference a register that is no longer used by real insns. (early_ra::apply_allocation): Update calls accordingly. gcc/testsuite/ PR target/113636 * go.dg/pr113636.go: New test.
