On Mon, Sep 28, 2026 at 10:00 AM Alexey Lapshin <[email protected]> wrote: > > xt_true_regnum is used by move expanders and insn conditions, which > IRA invokes through emit_move_insn and recog_memoized when emitting > moves for regional allocation. At that point reg_renumber has not > been resized to cover the new pseudos, so indexing it reads out of > bounds. Before LRA starts reg_renumber holds no final assignments, > so only consult it once LRA is in progress or reload has completed. > > gcc/ChangeLog: > > * config/xtensa/xtensa.cc (xt_true_regnum): Don't index > reg_renumber before LRA starts. > --- > gcc/config/xtensa/xtensa.cc | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-)
Regtested for target=xtensa-linux-uclibc, no new regressions. Marked that it fixes PR target/107549 and committed to master. -- Thanks. -- Max
