On 2026/09/29 18:33, Max Filippov wrote:
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.
This patch clearly targets the LRA transition code; so, wouldn't it be better to backport it to the releases following the transition to LRA - specifically GCC 14 through 16? ===== mailto:[email protected]
